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Carbon Capture and Storage in the Biofouling Tubeworm Ficopomatus Enigmaticus
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作者 Doimi Mauro 《Journal of Environmental Science and Engineering(A)》 CAS 2024年第4期128-135,共8页
The study investigates the potential of the serpulid tubeworm Ficopomatus sp.,sourced from Jesolo Lido(Venice,Italy),for CCS(Carbon Capture and Storage).Specimens were processed to extract bioactive compounds using a ... The study investigates the potential of the serpulid tubeworm Ficopomatus sp.,sourced from Jesolo Lido(Venice,Italy),for CCS(Carbon Capture and Storage).Specimens were processed to extract bioactive compounds using a 50%polypropylene glycol-water solvent system.Extracts were analysed and purified using column gel filtration chromatography,with fractions identified by TLC(Thin Layer Chromatography)and further characterized for antioxidant and antibacterial activities.Antioxidant activity was detected via DPPH(2,2-Diphenyl-1-Picrylhydrazyl)spraying on TLC plates,while antibacterial activity was evaluated using the antibiogram paper disk diffusion method.Enzyme activity in the fractions was previously confirmed through a bromothymol blue test followed by spectrophotometric analysis.The primary goal was to explore the CCS potential,using an experimental module involving Arduino Uno embedded microprocessor for the CO_(2) measurement and to confirm the conversion into insoluble carbonates(storage).The most active fraction,identified as S1,showed significant CCS action,confirmed by microscopic observation of calcareous deposits on treated sponges.These findings suggest that Ficopomatus sp.can be used in CCS research highlighting its potential for biotechnological applications in mitigating climate change.The paper underscores the importance of marine organisms in CCS and offers insights into innovative strategies for environmental conservation and carbon management. 展开更多
关键词 CCS CO_(2) marine carbonic anhydrase Jesolo beach(VE Italy) biofouling beach rock
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MARINE BIOFOULING IN OFFSHORE AREAS SOUTH OF HAINAN ISLAND, NORTHERN SOUTH CHINA SEA 被引量:2
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作者 严涛 严文侠 +3 位作者 梁冠和 董玉 王华接 严岩 《Chinese Journal of Oceanology and Limnology》 SCIE CAS CSCD 2000年第2期132-139,共8页
This study on the characteristics of fouling communities in offshore areas south of Hainan Island, northern South China Sea, was conducted at four sites there. At each station, test panels on iron frames were hung on ... This study on the characteristics of fouling communities in offshore areas south of Hainan Island, northern South China Sea, was conducted at four sites there. At each station, test panels on iron frames were hung on the mooring system at different depths. Data on biofouling were mainly obtained by examination of the fouled test panels. Organisms attached to buoys and anchors were scraped off and examined also. The results showed that the thickness and biomass of marine growth that increased the fluid loading on offshore installations depended to a large extent on hard foulers, i.e. mollusks and acorn barnacles. Algae, hydroids, stalked barnacles and bryozoans were important fouling species. The occurrence frequency and biomass of acorn barnacles decreased with increasing distance from the shore. 展开更多
关键词 SOUTH China SEA OFFSHORE biofouling
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Experimental Study of Invasion and Biofouling of Freshwater Mussel <i>Limnoperna fortunei</i> 被引量:4
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作者 Mengzhen Xu Zhaoyin Wang +2 位作者 Cheng Chieh Lin Baozhu Pan Na Zhao 《International Journal of Geosciences》 2013年第5期1-7,共7页
Golden mussel Limnoperna fortunei(Dunker 1857) is a filter-collector species of fresh water mussel originating from southern China. In the water transfer tunnels from the East River to Shenzhen and Hong Kong, golden m... Golden mussel Limnoperna fortunei(Dunker 1857) is a filter-collector species of fresh water mussel originating from southern China. In the water transfer tunnels from the East River to Shenzhen and Hong Kong, golden mussels attach to the walls of pipelines and gates, causing serious biofouling, increased flow resistance, and resulted in corrosion of the tunnel wall. Golden mussel has very high environmental adaptability and may colonize habitats with low dissolved oxygen and a wide range of trophic levels. The colonization process of the species on solid surface was studied in the Xizhijiang River, a tributary of the East River and the main water resource of Shenzhen from March 2010 to April 2011. The results showed that the golden mussel completed three generations and reproduced six cohorts per year in the tropic zone. Water temperature was the controlling factor for the growth rate and maturity of each cohort. Based on the results, an ecological method for controlling the invasion of golden mussels in water transfer tunnels was proposed. 展开更多
关键词 biofouling of Water Transfer TUNNELS Golden MUSSEL (Limnoperna fortunei) Reproduction INVASION Control
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Effects of Nutrients on Biofouling Formation and Preponderant Bacteria Diversity in Recirculating Cooling Water System 被引量:2
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作者 Ma Tao Liu Fang +1 位作者 Zhang Guizhi Zhao Chaocheng (College of Chemistry and Chemical Engineering,China University of Petroleum,Qingdao 266555) 《China Petroleum Processing & Petrochemical Technology》 SCIE CAS 2010年第4期57-62,共6页
A series of orthogonal array experiments were conducted using carbon source, ammonia nitrogen and total phosphorus (TP) as major influencing factors to investigate the effects of nutrients on biofouling formation an... A series of orthogonal array experiments were conducted using carbon source, ammonia nitrogen and total phosphorus (TP) as major influencing factors to investigate the effects of nutrients on biofouling formation and preponderant bacteria diversity in the recirculatiug cooling water system. Carbon source was demonstrated to be the most significant determinant affecting the biofouling formation. A minimum biofouling outcome was obtained when BOD2, NHa+-N and TP were 25, 10, and 1 mg/L, respectively. Then the preponderant bacteria strains in biofouling mass under two typical culture conditions (negative and favorable) were identified applying both traditional biochemical methods and further molecular biology technology with phylogenetic affiliation analysis, which indicated that Enterobacteriaceae Enterobacter, Micrococcaceae Staphylococcus, Bacillaceae Bacillus, Enterobacteriaceae Proteus, Neisseriaceae Neisseria and Pseudomonadaceae Pseudomonas were dominant under negative condition, while Enterobacteriaceae Klebsiella, Enterobacteriaceae Enterobacter and Microbacterium - under favorable one. 展开更多
关键词 recirculating cooling water biofouling numerical analysis polymerase chain reaction
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A Method and a Surface Treatment Agent for Preventing Biofouling on Surfaces under Water 被引量:1
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《Journal of Chemistry and Chemical Engineering》 2012年第3期227-232,共6页
This paper presents an environm centally friendly method of inhibiting biofouling especially acorn barnacles on surfaces under water by using nicotine and selenium in the form of Se(0), or such a substance which can... This paper presents an environm centally friendly method of inhibiting biofouling especially acorn barnacles on surfaces under water by using nicotine and selenium in the form of Se(0), or such a substance which can be converted into them. Both of the substances are necessary to oxygen dependent organisms and will be used after conversion, but are toxic in high doses. By adding the substances to paint or other surface treatment agent which marine surfaces are treated with, organisms which are trying to establish themselves on the surfaces will be exposed to so high doses, the reactions which the settling is based on are disturbed. When the substances leak out into the seas, they will act as environment protectors, as they promote the development of organisms. Nicotine is transformed to nicotine amid which is the reactive part in NADH and one of the most important substances for the transference of hydrogen. Selenite is reduced to Se(0), also involved in the transport chain of hydrogen to reducible oxygen. However, large quantities Se(0) may disturb the reactions of sulphur b'./binding to it and impairing the formation of S-S-bridges. 展开更多
关键词 Marine biofouling environment protection crustaceans catemines NICOTINE selenite.
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Seasonal Variability of Biofouling Community Structure in the Gulf of Mannar,Southeast Coast of India:A Multivariate Approach
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作者 MARIMUTHU Nithyanandam WILSON James Jerald KUMARAGURU Arumugam Kuppuswamy 《Journal of Ocean University of China》 SCIE CAS CSCD 2023年第3期766-776,共11页
In this research,an Underwater Biofouling Panel(UWBFP)system was erected for the qualitative and quantitative estimation of macro fouling organisms in the Gulf of Mannar.Forty-four biofoulers were identified from four... In this research,an Underwater Biofouling Panel(UWBFP)system was erected for the qualitative and quantitative estimation of macro fouling organisms in the Gulf of Mannar.Forty-four biofoulers were identified from four types of selected test panels.Among these biofoulers,Amphibalanus amphitrite(Darwin,1854)was the dominant one.The concrete panel encouraged the highest barnacle density compared to the other panels.Three series of test panels were used to assess the seasonal density of biofouling communities.The overall variation in barnacle count in the seaward and shoreward sides of all these three series were tested.They were found to be significantly different from each other.The greater variations in the barnacle density observed in this study in A-series of test panels could be due to the lack of or absence of other foulers to compete within the fortnight.The Shannon-Wiener species diversity index showed the highest diversity in wood substratum among the three series with greater accumulation of different types of fouling organisms.Multivariate analyses were also performed to understand the seasonal variation as well as the settlement pattern on the different directions of test panels based on validated data.PCA showed a strong variability(PC1 between 70.8%and 98.6%variance)between the directions of the panels in connection with barnacle density.The shade plot and CAP analysis segregated the short-term A-series test panels from the long-term(B-and C-series)test panels.Hence,the output was helpful in understanding the recruitment status of various faunal resources involved in the biofouling processes. 展开更多
关键词 biofouling BARNACLE hard fouler multivariate analysis fouling biomass Gulf of Mannar
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Notes Marine biofouling in Hong Kong: a review
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作者 Zongguo Huang Third Institute of Oceanography, State Oceanic Administration, Xiamen 361005,China.E-mail:hzg@public.xm.fj.cn 《Acta Oceanologica Sinica》 SCIE CAS CSCD 2003年第3期467-482,共16页
From 1980 to 1998, biofouling communities in Hong Kong waters, the Zhujiang River Estuary and the Mirs Bay were studied and a total of 610 samples. The samples were collected from vessels, buoys, piers and cages. Tota... From 1980 to 1998, biofouling communities in Hong Kong waters, the Zhujiang River Estuary and the Mirs Bay were studied and a total of 610 samples. The samples were collected from vessels, buoys, piers and cages. Totally, 340 species (see Appendix I) have been recorded and identified, six of which are new. At the same time, research on the biology of the cirripede, bryozoan, polychaete and mollusc communities were also conducted. Twenty-three related papers have been published. This review summarizes works in Hong Kong over past twenty years, and some unpublished data are also reported. 展开更多
关键词 biofouling communities DISTRIBUTION Hong Kong waters
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Piloting Study on Biofouling Control of Reverse Osmosis System in Steel Mill Wastewater Reuse
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作者 Cheng Yang Tina Arrowood Jon Johnson 《Journal of Environmental Science and Engineering(A)》 2017年第9期453-461,共9页
The biofouling of RO (Reverse Osmosis) system is one of the most common problems in highly contaminated demineralization and wastewater reuse system. The biological fouling occurs due to the bacteria growth and prol... The biofouling of RO (Reverse Osmosis) system is one of the most common problems in highly contaminated demineralization and wastewater reuse system. The biological fouling occurs due to the bacteria growth and proliferation under nutritive environment, resulting in a dramatic increase of dP (differential pressure) in the RO system, which requires frequent system shutdown for cleaning. This paper discusses the effectiveness of low-dP RO element and periodic flushing on the biofouling scheme of industrial steel mill wastewater reuse system. The low-dP RO element is able to provide low RO system dP, which is expressed to be lower biofouling starting point during the industrial system operation. However, the periodic flushing utilizes fresh water to remove the biofilm deposit along with feed channel. The long term operation performance demonstrated strong caustic is effective in removing the biofilm and recovering RO system performance. It is experimentally validated that, in the case of a high biofouling environment, low-dP RO element and periodic flushing is able to extend the cleaning cycles by 36.6% and 11.4%, respectively. Meanwhile, a joint application of both methods is proven to improve the biofouling control and extend the cleaning cycle by 62.5%, as compared to standard RO technology. 展开更多
关键词 RO (Reverse Osmosis) biofouling MEMBRANE dP (Differential Pressure) wastewater reuse
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Assessment of Biofouling Using Leaching Rate of Antifouling Agents and Bioluminescent Assay
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作者 Ryuji Kojima Shoko Imai +1 位作者 Toshiaki Shibata Koichi Ueda 《Journal of Shipping and Ocean Engineering》 2014年第7期214-224,共11页
The authors investigated the leaching rate of antifouling agents from marine paint using an instrument that allows direct measurement from the flat bottom of ship hulls shortly after dry dock. A similar procedure was ... The authors investigated the leaching rate of antifouling agents from marine paint using an instrument that allows direct measurement from the flat bottom of ship hulls shortly after dry dock. A similar procedure was also used for painted flat panels that were immersed in the ocean. The relationship between leaching rate and fouling condition was considered by quantifying the amount of ATP (adenosine triphosphate) on the surface of immersed flat panel using fluorescence spectroscopy. The leaching rate results from ship hulls showed good agreement with the value by reporting of leaching rate of antifouling agents. The fluorescence spectroscopy results showed that the amount of ATP on the surface of the panel increased over time as the leaching rate fell, which implies an inverse relationship between leaching rate and fouling index. Fluorescence spectroscopy was also seen to be a simple method for evaluating the relationship between biofouling indexes and leaching rate. 展开更多
关键词 Antifouling agent biofouling leaching rate BIOMASS ATP fluorescence spectroscopy.
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A Study on the Composition of Wastewater Produced during Ship Biofouling Management
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作者 Sangho Park Mansoo Kim +3 位作者 YoungChae Song Kyujung Chae Joohyung Choi Junhyuk Yang 《Journal of Environmental Science and Engineering(B)》 2023年第6期249-256,共8页
The IMO(International Maritime Organization)recognized the problem of invasive species invasion and adopted the“International Convention for the Control and Management of Ships’Ballast Water and Sediments”in 2004,w... The IMO(International Maritime Organization)recognized the problem of invasive species invasion and adopted the“International Convention for the Control and Management of Ships’Ballast Water and Sediments”in 2004,which came into force on September 8,2017.In 2011,the IMO approved the“Guidelines for the Control and Management of Ships’Biofouling to Minimize the Transfer of Invasive Aquatic Species”to minimize the movement of invasive species by hull-attached organisms and required ships to manage the organisms attached to their hulls.Invasive species enter new environments through ships’ballast water and hull attachment.However,several obstacles to implementing these guidelines have been identified,including a lack of underwater cleaning equipment,regulations on underwater cleaning activities in ports,and difficulty in accessing crevices in underwater areas.The shipping industry,which is the party responsible for understanding these guidelines,wants to implement them for fuel cost savings resulting from the removal of organisms attached to the hull,but they anticipate significant difficulties in implementing the guidelines due to the obstacles mentioned above.Robots or people remove the organisms attached to the hull underwater,and the resulting wastewater includes various species of organisms and particles of paint and other pollutants.Currently,there is no technology available to sterilize the organisms in the wastewater or stabilize the heavy metals in the paint particles.In this study,we aim to analyse the characteristics of the wastewater generated from the removal of hull-attached organisms and select the optimal treatment technology.The organisms in the wastewater generated from the removal of the attached organisms meet the biological treatment standard(D-2)using the sterilization technology applied in the ships’ballast water treatment system.The heavy metals and other pollutants in the paint particles generated during removal are treated using stabilization technologies such as thermal decomposition.The wastewater generated is treated using a two-step process:(1)development of sterilization technology through pretreatment filtration equipment and electrolytic sterilization treatment and(2)development of technology for removing particle pollutants such as heavy metals and dissolved inorganic substances.Through this study,we will develop a biological removal technology and an environmentally friendly processing system for the waste generated after removal that meets the requirements of the government and the shipping industry and lay the groundwork for future treatment standards. 展开更多
关键词 biofouling ballast water treatment system FILTRATION STERILIZATION WASTEWATER
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A state-of-the-art review on passivation and biofouling of Ti and its alloys in marine environments 被引量:13
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作者 Shaokun Yan Guang-Ling Song +6 位作者 Zhengxian Li Haonan Wang Dajiang Zheng Fuyong Cao Miroslava Horynova Matthew S.Dargusch Lian Z-hou 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2018年第3期421-435,共15页
High strength-to-weight ratio, commendable biocompatibility and excellent corrosion resistance make Ti alloys widely applicable in aerospace, medical and marine industries. However, these alloys suffer from serious bi... High strength-to-weight ratio, commendable biocompatibility and excellent corrosion resistance make Ti alloys widely applicable in aerospace, medical and marine industries. However, these alloys suffer from serious biofouling, and may become vulnerable to corrosion attack under some extreme marine conditions. The passivating and biofouling performance of Ti alloys can be attributed to their compact, stable and protective films. This paper comprehensively reviews the passivating and biofouling behavior, as well as their mechanisms, for typical Ti alloys in various marine environments. This review aims to help extend applications of Ti alloys in extremely harsh marine conditions. 展开更多
关键词 Ti alloy Passivity biofouling
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Biocorrosion induced by red-tide alga-bacterium symbiosis and the biofouling induced by dissolved iron for carbon steel in marine environment 被引量:1
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作者 Yuqiao Dong Guang-Ling Song +3 位作者 Jiawei Zhang Yahui Gao Zi Ming Wang Dajiang Zheng 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2022年第33期107-117,共11页
The assemblages of unicellular microalgae and bacteria in phytoplankton communities can generally result in biodeterioration of metals in marine environment.In this study,the self-promoted biofouling mechanism underne... The assemblages of unicellular microalgae and bacteria in phytoplankton communities can generally result in biodeterioration of metals in marine environment.In this study,the self-promoted biofouling mechanism underneath red-tide alga Phaeodactylum tricornutum and its symbiotic bacterium Bacillus altitudinis was systematically revealed.The mutualistic interaction of the bacteria and algae quadrupled the corrosion rate in comparison to the individual effect of the bacterium or algal strain alone.Reversely,the corroded metal appeared to be an accelerator that can stimulate the activity of the P.tricornutum and aggravate the biological pollution based on the result of 62.3%up-regulation of the key photosynthesis genes.The corrosion-biofouling-accelerated corrosion-deteriorated biofouling formed a vicious cycle. 展开更多
关键词 Algal-bacterial symbiosis Marine biofouling Carbon steel Corrosion products
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Impact assessment of biofouling resistant nano copper oxide-polyaniline coating on aquaculture cage nets 被引量:1
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作者 Pachareentavita Muhamed Ashraf Nalini Manju Lekshmi +5 位作者 Shunmugavel Chinnadurai Sajeevan Anjitha Mathath Archana Chirayil Meethalepurayil Vineeth Kumar Kavitha Mandhiram Sandhya Ambarish Purackattu Gop 《Aquaculture and Fisheries》 CSCD 2023年第5期538-543,共6页
Biofouling is a major issue in aquaculture cages and nano materials based antifouling strategies became more prominent in recent years.Polyethylene aquaculture cage net surface which is modified with polyaniline and n... Biofouling is a major issue in aquaculture cages and nano materials based antifouling strategies became more prominent in recent years.Polyethylene aquaculture cage net surface which is modified with polyaniline and nano-copper oxide(CuO),reported to have biofouling resistance.Leaching of nano CuO from the net to the aquatic environment and its bioaccumulation in fish is the major concern against the technology adoption.The present study aimed to understand the accumulation of copper in fishes grown in a nano CuO treated aquaculture cage net.Studied the leaching pattern of nano CuO,biofouling inhibition and changes in strength of the cage net due to the nano CuO treatments.Fishes grown in the treated cages exhibited normal growth characteristics with no signs of abnormalities and also copper in their organs were within the prescribed standard limit.The CuO treated cage net exhibited excellent biofouling resistance and the percentage of occlusion of mesh by foulers were 56.77%more efficient than untreated cage net.Rate of nano CuO leached to the aquatic system was less than 8μg/g⋅d.The fouling organism assemblage on untreated and treated net was 18 and 11 species,respectively.Major calcareous shelled foulers were absent on treated nets.The study highlighted the potential application of nano CuO treatment to control biofouling in aquaculture cages. 展开更多
关键词 AQUACULTURE BIOACCUMULATION biofouling POLYANILINE Nano copper oxide Nano toxicity
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Transparent exopolymer particles(TEPs)-associated protobiofilm:A neglected contributor to biofouling during membrane filtration 被引量:1
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作者 Shujuan Meng Rui Wang +6 位作者 Kaijing Zhang Xianghao Meng Wenchao Xue Hongju Liu Dawei Liang Qian Zhao Yu Liu 《Frontiers of Environmental Science & Engineering》 SCIE EI CSCD 2021年第4期205-214,共10页
Transparent exopolymer particles(TEPs)are a class of transparent gel-like polysaccharides,which have been widely detected in almost every kind of feed water to membrane systems,including freshwater,seawater and wastew... Transparent exopolymer particles(TEPs)are a class of transparent gel-like polysaccharides,which have been widely detected in almost every kind of feed water to membrane systems,including freshwater,seawater and wastewater.Although TEP have been thought to be related to the membrane fouling,little information is currently available for their influential mechanisms and the pertinence to biofouling development.The present study,thus,aims to explore the impact of TEPs on biofouling development during ultrafiltration.TEP samples were inoculated with bacteria for several hours before filtration and the formation of“protobiofilm”(pre-colonized TEP by bacteria)was examined and its influence on biofouling was determined.It was observed that the bacteria can easily and quickly attach onto TEPs and form protobiofilms.Ultrafiltration experiments further revealed that TEP-protobiofilms served as carriers which facilitated and accelerated transport of bacteria to membrane surface,leading to rapid development of biofouling on the ultrafiltration membrane surfaces.Moreover,compared to the feed water containing independent bacteria and TEPs,more flux decline was observed with TEP-protobiofilms.Consequently,it appeared from this study that TEP-protobiofilms play a vital role in the development of membrane biofouling,but unfortunately,this phenomenon has been often overlooked in the literature.Obviously,these findings in turn may also challenge the current understanding of organic fouling and biofouling as membrane fouling caused by TEP-protobiofilm is a combination of both.It is expected that this study might promote further research in general membrane fouling mechanisms and the development of an effective mitigation strategy. 展开更多
关键词 Transparent exopolymer particles(TEPs) TEP-protobiofilm Bacteria attachment biofouling of membrane
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Cathodic biofouling control by microbial separators in air-breathing microbial fuel cells 被引量:1
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作者 Chao Li Kexin Yi +1 位作者 Shaogang Hu Wulin Yang 《Environmental Science and Ecotechnology》 SCIE 2023年第3期35-43,共9页
Microbial fuel cells(MFCs)incorporating air-breathing cathodes have emerged as a promising ecofriendly wastewater treatment technology capable of operating on an energy-free basis.However,the inevitable biofouling of ... Microbial fuel cells(MFCs)incorporating air-breathing cathodes have emerged as a promising ecofriendly wastewater treatment technology capable of operating on an energy-free basis.However,the inevitable biofouling of these devices rapidly decreases cathodic catalytic activity and also reduces the stability of MFCs during long-term operation.The present work developed a novel microbial separator for use in air-breathing MFCs that protects cathodic catalytic activity.In these modified devices,microbes preferentially grow on the microbial separator rather than the cathodic surface such that biofouling is prevented.Trials showed that this concept provided low charge transfer and mass diffusion resistance values during the cathodic oxygen reduction reaction of 4.6±1.3 and 17.3±6.8 U,respectively,after prolonged operation.The maximum power density was found to be stable at 1.06±0.07 W m2 throughout a long-term test and the chemical oxygen demand removal efficiency was increased to 92%compared with a value of 83%for MFCs exhibiting serious biofouling.In addition,a cathode combined with a microbial separator demonstrated less cross-cathode diffusion of oxygen to the anolyte.This effect indirectly induced the growth of electroactive bacteria and produced higher currents in air-breathing MFCs.Most importantly,the present microbial separator concept enhances both the lifespan and economics of air-breathing MFCs by removing the need to replace or regenerate the cathode during longterm operation.These results indicate that the installation of a microbial separator is an effective means of stabilizing power generation and ensuring the cost-effective performance of air-breathing MFCs intended for future industrial applications. 展开更多
关键词 Air-breathing MFC Microbial separator Niche-selective superiority biofouling elimination Stability and sustainability
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Advanced strategies for marine antifouling based on nanomaterial-enhanced functional PDMS coatings
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作者 Xiaohui Shi Hao Wei +4 位作者 Wenjun Zhou Paul E.D.Soto Rodriguez Cunguo Lin Lei Wang Zhijia Zhang 《Nano Materials Science》 EI CAS CSCD 2024年第4期375-395,共21页
Marine biofouling seriously affects human marine exploitation and transportation activities,to which marine antifouling(AF)coatings are considered to be the most cost-effective solution.Since the mid-20th century,huma... Marine biofouling seriously affects human marine exploitation and transportation activities,to which marine antifouling(AF)coatings are considered to be the most cost-effective solution.Since the mid-20th century,human beings have dedicated their efforts on developing AF coatings with long cycle and high performance,leading to a large number of non-target organisms?distortion,death and marine environmental pollution.Polydimethylsiloxane(PDMS),is considered as one of the representative environment-friendly AF materials thanks to its non-toxic,hydrophobic,low surface energy and AF properties.However,PDMS AF coatings are prone to mechanical damage,weak adhesion strength to substrate,and poor static AF effect,which seriously restrict their use in the ocean.The rapid development of various nanomaterials provides an opportunity to enhance and improve the mechanical properties and antifouling properties of PDMS coating by embedding nanomaterials.Based on our research background and the problems faced in our laboratory,this article presents an overview of the current progress in the fields of PDMS composite coatings enhanced by different nanomaterials,with the discussion focused on the advantages and main bottlenecks currently encountered in this field.Finally,we propose an outlook,hoping to provide fundamental guidance for the development of marine AF field. 展开更多
关键词 NANOMATERIALS ANTIFOULING PDMS composites ENVIRONMENT-FRIENDLY Marine biofouling
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利用纳米气泡控制农业废水灌溉系统复合污垢的机制
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作者 Yang Xiao Bo Zhou +6 位作者 Siyuan Tan Lei Li Tahir Muhammad Buchun Si Changjian Ma Sunny C.Jiang Yunkai Li 《Engineering》 SCIE EI CAS CSCD 2024年第4期214-225,共12页
The increasing demand for wastewater treatment has become a notable trend for addressing global water scarcity.However,fouling is a significant challenge for wastewater distribution engineering systems.This study prov... The increasing demand for wastewater treatment has become a notable trend for addressing global water scarcity.However,fouling is a significant challenge for wastewater distribution engineering systems.This study provides an approach using nanobubbles(NBs)to control fouling.The antifouling capacities of three types of NBs,six oxygen concentrations,and two application procedures(prevention and removal)are investigated.The results show that NBs effectively mitigate composite fouling—including biofouling,inorganic scaling,and particulate fouling—in comparison with the non-NBs group.More specifically,hydroxyl radicals generated by the self-collapse of NBs oxidize organics and kill microorganisms in wastewater.The negatively charged surfaces of the NBs transform the crystalline form of CaCO_(3)from calcite to looser aragonite,which reduces the likelihood of ion precipitation.Furthermore,the NBs gas-liquid interfaces act as gas"bridges"between colloidal particles,enhancing the removal of particles from wastewater.Lastly,although the NBs inhibit the growth of fouling,they do not significantly remove the already adhered fouling in non-NBs treated groups.This study anticipates that the application of NBs will address the significant fouling issue for various wastewater distribution engineering systems in order to meet the global challenge of sustainable water supplies. 展开更多
关键词 biofouling SCALING Colloidal fouling WASTEWATER Antifouling mechanism
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Review of Underwater Ship Hull Cleaning Technologies 被引量:10
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作者 Changhui Song Weicheng Cui 《Journal of Marine Science and Application》 CSCD 2020年第3期415-429,共15页
This paper presents a comprehensive review and analysis of ship hull cleaning technologies.Various cleaning methods and devices applied to dry-dock cleaning and underwater cleaning are introduced in detail,including r... This paper presents a comprehensive review and analysis of ship hull cleaning technologies.Various cleaning methods and devices applied to dry-dock cleaning and underwater cleaning are introduced in detail,including rotary brushes,high-pressure and cavitation water jet technology,ultrasonic technology,and laser cleaning technology.The application of underwater robot technology in ship cleaning not only frees divers from engaging in heavy work but also creates safe and efficient industrial products.Damage to the underlying coating of the ship caused by the underwater cleaning operation can be minimized by optimizing the working process of the underwater cleaning robot.With regard to the adhesion technology mainly used in underwater robots,an overview of recent developments in permanent magnet and electromagnetic adhesion,negative pressure force adhesion,thrust force adhesion,and biologically inspired adhesion is provided.Through the analysis and comparison of current underwater robot products,this paper predicts that major changes in the application of artificial intelligence and multirobot cooperation,as well as optimization and combination of various technologies in underwater cleaning robots,could be expected to further lead to breakthroughs in developing next-generation robots for underwater cleaning. 展开更多
关键词 biofouling Dry-dock cleaning Underwater ship cleaning Adhesion technology Cleaning robot
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Fouling in offshore areas southeast of the Zhujiang(Pearl)River Delta,the northern South China Sea 被引量:9
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作者 Yan Tao, Yan Wenxia, Dong Yu, Liang Guanhe, Yan Yan, Wang Huajie South China Sea Institute of Oceanology,Chinese Academy of Sciences,Guangzhou 510301,China. 《Acta Oceanologica Sinica》 SCIE CAS CSCD 2003年第2期201-212,共12页
In order to understand the type and extent of marine fouling in offshore areas southeast ofthe Zhujiang (Pearl) River delta, within the period form May 1986 to June 1987, two biological buoys were deployed at water de... In order to understand the type and extent of marine fouling in offshore areas southeast ofthe Zhujiang (Pearl) River delta, within the period form May 1986 to June 1987, two biological buoys were deployed at water depths of 95 m and 113 m located in 114 km and 160 km off the coast of Hong Kong, respectively. Moreover, the fouling community of a Marex hydrological buoy located in 115 m depth water 172 km off Hong Kong was also surveyed. The results show that a total of 78 species were collected and identified. The panels exposed for 3 months were mainly dominated by stalked barnacles Conchoderma hunteri and Lepas anatifera and hydroids Orthopyxis sp. As for the buoys, including the subsurface buoy, and their mooring systems exposed for 6 and 12 months, respectively, some hard foulers such as common oysters, pearl oysters, acorn barnacles and bryozoans were also found. The compositions of fouling communities also varied greatly with depth. 展开更多
关键词 biofouling offshore structures the South China Sea
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Eco-friendly biodegradable polyurethane based coating for antibacterial and antifouling performance 被引量:3
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作者 Abid Ali Bilal Ul Amin +7 位作者 Wenwu Yu Taijiang Gui Weiwei Cong Kai Zhang Zheming Tong Jiankun Hu Xiaoli Zhan Qinghua Zhang 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2023年第2期80-88,共9页
Biofouling, which comprises the absorption of proteins and the adhesion of bacteria to the surface of living entities, is a severe concern for the maritime sector since it ultimately leads to hydrodynamic drag,resulti... Biofouling, which comprises the absorption of proteins and the adhesion of bacteria to the surface of living entities, is a severe concern for the maritime sector since it ultimately leads to hydrodynamic drag,resulting in a higher increase in fuel consumption. As a result, polymer resins are crucial in the marine sector for anti-biofouling coatings. In this work, the poly(caprolactone-ethylene glycol-caprolactone)-p olyurethane(PECL-PU) are prepared through ε-caprolactone(CL), poly(ethylene glycol)(PEG), 4,4'-methylene bis(cyclohexyl isocyanate) and 1,4 butanediol. Our study demonstrate that the PECL-PU copolymer degraded in artificial seawater(5.21%), enzymatic solution(12.63%), and seawater(13.75%)due to the presence of PEG segments in the laboratory-based test under static condition. Because the addition of PEG segments are increased the polymer's amorphous area and decreased the crystallization of the polycaprolactone(PCL) in the copolymer, as demonstrated by differential scanning calorimetry, X-ray diffraction, and water contact angle studies. Therefore, the hydrolysis rates of PECL-PU were higher than the caprolactone-co-polyurethane(CL-PU). The antifouling test showed that PECL-PU3 copolymer had about 90.29% protein resistance, 85.2% Escherichia coli(E. coli) reduction and 94.61% marine diatom Navicula incerta reduction comparison to the control. We have developed an eco-friendly and inexpensive promising degradable polyurethane for reduction of bacterial biofilm, which can preserve the formation of biofouling on marine coating under practical sea conditions. 展开更多
关键词 CAPROLACTONE PEG segments Biodegradable polyurethane biofouling Hydrolytic degradation
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