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Tannins from Acacia mangium Bark as Natural Dyes for Textiles:Characteristics and Applications
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作者 Maya Ismayati Nissa Nurfajrin Solihat +3 位作者 Fifi Melinda Setiawati Wasrin Syafii Yuki Tobimatsu Deni Zulfiana 《Journal of Renewable Materials》 EI CAS 2024年第9期1625-1637,共13页
Tannins are capable of producing natural dyes with antioxidant and antibacterial propertis,while synthetic dyes are commonly used in the textile industry,causing environmental issues like water pollution.This research... Tannins are capable of producing natural dyes with antioxidant and antibacterial propertis,while synthetic dyes are commonly used in the textile industry,causing environmental issues like water pollution.This research aims to utilize waste tannins as natural dyes as an alternative to synthetic dyes.This study examined the effect of the extraction method on tannin properties such as phenolic content,antioxidants,and antibacterial activity.In addition,Pyrolysis Gas Chromatography‒Mass Spectrometry(Py-GCMS)analysis was used to identify the effect of extraction temperature on the chemical elucidation of tannin.The effect of tannin concentration was evaluated against four bacteria that are usually found on human skin:Staphylococcus epidermidis,Bacillus subtilis,Propionibacterium acnes,and Staphylococcus aureus.Extraction temperature significantly influences the chemical composition of tannin,which leads to different antioxidant properties.The maximum antibacterial properties of tannin were obtained at 90℃with the inhibition zone in the range of 0.9–1.0 mm against four bacteria,tannin yield of 26.59%,Gallic Acid Equivalents or total phenolic content(GAE)of 40.30 mg/g,and Radical Scavenging Activity or antioxidant activity(RSA)of 89.88%.Moreover,the concentration of tannin was significantly linear with its antibacterial properties.Tannin was successfully applied to the textile by using alum as a mordanting agent to create an antibacterial textile.The textile’s bacterial structure damage was analyzed under Field Emission Scanning Electron Microscopy(FESEM).After 50 washings,tannin-textiles with alum-modified properties remained stable compared to those without alum,with S.aureus and S.epidermidis being the most vulnerable bacteria,as confirmed by FESEM images.Hence,tannin is a feasible alternative to harmful and nondegradable synthetic dyes and antibacterial agents. 展开更多
关键词 Acacia mangium tannin ANTIBACTERIAL ANTIOXIDANT different temperature extraction dyes
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Biocatalytic enhancement of laccase immobilized on ZnFe_(2)O_(4) nanoparticles and its application for degradation of textile dyes
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作者 Yuhang Wei Qingpeng Zhu +3 位作者 Weiwei Xie Xinyue Wang Song Li Zhiming Chen 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2024年第4期216-223,共8页
Efficient and convenient treatment of industrial dyeing wastewater is of great significance to guarantee human and animal health.This work presented the enhanced catalytic activity at pH 3.0 of laccase immobilized on ... Efficient and convenient treatment of industrial dyeing wastewater is of great significance to guarantee human and animal health.This work presented the enhanced catalytic activity at pH 3.0 of laccase immobilized on amino-functionalized ZnFe_(2)O_(4) nanoparticles(ZnFe_(2)O_(4)-laccase)and its application for the degradation of textile dyes.Due to the existence of a large number of oxygen vacancies on the surface of the ZnFe_(2)O_(4) nanoparticles,negative ions accumulated on the magnetic carriers,which resulted in a harsh optimal pH value of the ZnFe_(2)O_(4)-laccase.Laccase activity assays revealed that the ZnFe_(2)O_(4)-laccase possessed superior pH and thermal stabilities,excellent reusability,and noticeable organic solvent tolerance.Meanwhile,the ZnFe_(2)O_(4) laccase presented efficient and sustainable degradation of high concentrations of textile dyes.The initial decoloration efficiencies of malachite green(MG),brilliant green(BG),azophloxine,crystal violet(CV),reactive blue 19(RB19),and procion red MX-5B were approximately 99.1%,95.0%,93.3%,87.4%,86.1%,and 85.3%,respectively.After 10 consecutive reuses,the degradation rates of the textile dyes still maintained about 98.2%,92.5%,83.2%,81.5%,79.8%and 65.9%,respectively.The excellent dye degradation properties indicate that the ZnFe_(2)O_(4)-laccase has a technical application in high concentrations of dyestuff treatment. 展开更多
关键词 ZnFe_(2)O_(4)-laccase Catalytic activity Stability and reusability Degradation of textile dye
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Bioremediation of Textile Azo Dyes Amido Black 10B, Reactive Black 5, Reactive Blue 160 by Lentinus squarrosulus AF5 and Assessment of Toxicity of the Degraded Metabolites
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作者 Anshu Mathur Chandrachur Ghosh +2 位作者 Partha Roy Ramasare Prasad Rajesh Pratap Singh 《Advances in Microbiology》 CAS 2024年第2期137-161,共25页
Bioremediation is an eco-compatible and economical approach to counter textile dye menace. The isolated Lentinus squarrosulus AF5 was assessed for decolourization of textile azo dyes, and had shown ~93%, 88% and 70% d... Bioremediation is an eco-compatible and economical approach to counter textile dye menace. The isolated Lentinus squarrosulus AF5 was assessed for decolourization of textile azo dyes, and had shown ~93%, 88% and 70% decolorization of Reactive blue 160 (RB160), Reactive black 5 (RB5) and Amido black 10B (AB10B) respectively. Further analysis using UV-vis, HPLC, and FTIR, <sup>1</sup>H NMR had shown the degradation of the dyes. Toxicity analysis of the metabolites was performed using seed germination and plant growth on two agriculturally important plants Guar (Cyamopsis tetragonoloba) and wheat (Triticum aestivum) as well as cytotoxicity analysis using the human keratinocyte cell line (HaCaT). The dye mix appeared inhibitory for seed germination (20% - 40%), whereas metabolites were non-inhibitory for germination. Treatment of HaCaT cells with of dye mix and metabolites led into 45% and ~100% of cell viability of HaCaT cells respectively. Therefore, metabolites following degradation of the dye mix were observed to be non-toxic. 展开更多
关键词 Lentinus squarrosulus AF5 Azo dyes FTIR 1H NMR CATABOLISM CYTOTOXICITY
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Design of the reactive dyes containing large planar multi-conjugated systems and their application in non-aqueous dyeing 被引量:1
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作者 Aiqin Gao Xiang Luo +3 位作者 Huanghuang Chen Aiqin Hou Hongjuan Zhang Kongliang Xie 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2023年第2期264-271,共8页
The development of pollution-free dyeing technology, including anhydrous dyeing and non-aqueous dyeing technologies, has always been an important way and research hot in energy conservation and emission reduction. Des... The development of pollution-free dyeing technology, including anhydrous dyeing and non-aqueous dyeing technologies, has always been an important way and research hot in energy conservation and emission reduction. Designing new structural dye molecules is the key to water-saving dyeing processes.Herein, three reactive dyes were designed and synthesized, which contained large planar multiconjugated systems and multi-reactive groups. The designed reactive dyes are expected to have high affinity and high fixations in non-aqueous or small bath dyeing processes. The reactive dyes were applied in the decamethylcyclopentasiloxane(DMCS) reverse micelle dyeing for cotton fabric. High exhaustion rate of 99.35%, 98.10% and 98.80%, and fixation rate of 95.15%, 96.34% and 94.40% for three dyes, R1,R2 and R3, could be respectively obtained. The dyes can be fully utilized and had excellent dyeing performance, fastness and levelling properties under the revere micelle dyeing. The cotton fabric is like an oil-water separator in the dyeing process, where the dye micelles rapidly absorb and permeate into the cotton fibers. DMCS circulates around the fabric to transfer mass and energy. After dyeing, the solvent can be separated quickly and reused. The new reactive dyes containing large planar and multi-conjugated systems have potential application in green and sustainable dyeing technology with less wastewater and higher utilization. 展开更多
关键词 Reactive dyes Non-aqueous dyeing High fixation rate Waste water Synthesis RECOVERY
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Visible-light degradation of azo dyes by imine-linked covalent organic frameworks 被引量:1
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作者 Hongbo Xue Sen Xiong +1 位作者 Kai Mi Yong Wang 《Green Energy & Environment》 SCIE EI CSCD 2023年第1期194-199,共6页
Covalent organic frameworks(COFs)are nanoporous crystalline polymers with densely conjugated structures.This work discovers that imine-linked COFs exhibit remarkable photodegradation efficiency to azo dyes dissolved i... Covalent organic frameworks(COFs)are nanoporous crystalline polymers with densely conjugated structures.This work discovers that imine-linked COFs exhibit remarkable photodegradation efficiency to azo dyes dissolved in water.Visible light generates different types of radicals from COFs,and superoxide radicals break N=N bonds in dye molecules,resulting in 100%degradation of azo dyes within 1 h.In contrast,these dyes cannot be degraded by conventionally used photocatalysts,for example,TiO2.Importantly,the COF photocatalysts can be recovered from the dye solutions and re-used to degrade azo dyes for multiple times without loss of degradation efficiency.This work provides an efficient strategy to degrade synthetic dyes,and we expect that COFs with designable structures may use as new photocatalysts for other important applications. 展开更多
关键词 Covalent organic frameworks dyes Photocatalytic degradation Porous polymer Water pollution
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One-step crosslinking preparation of tannic acid particles for the adsorption and separation of cationic dyes
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作者 Yujia Cui Zhiqiang Tan +2 位作者 Yanan Wang Shuxian Shi Xiaonong Chen 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2023年第5期309-318,共10页
In this study,a new tannic acid adsorbent(ethylene glycol diglycidyl ether crosslinked tannic acid,TAEGDE)for adsorptive removal of dyes from water was prepared using EGDE as a cross-linking agent.The resultant TA-EGD... In this study,a new tannic acid adsorbent(ethylene glycol diglycidyl ether crosslinked tannic acid,TAEGDE)for adsorptive removal of dyes from water was prepared using EGDE as a cross-linking agent.The resultant TA-EGDE was in particulate form with rough surface morphology and a diameter ranging from 10 to 30μm.The adsorption performance of the TA-EGDE was evaluated in a flow-through mode using water samples contaminated with methylene blue(MB)and two-component mixed dyes,respectively.The TA-EGDE provided adsorption capacity up to 721.8 mg·g^(-1)at 65°C for MB.It showed a high removal efficiency(99%)of MB(50 mg·L^(-1))from the water sample and could recovery 90%of the adsorbed MB by eluting with acidic ethanol aqueous solution.The excellent adsorption of MB and neutral red on the TA-EGDE may be the result of the synergy of electrostatic interaction andπ-πinteraction.Furthermore,the TA-EGDE could separate dyes from water samples contaminated with twocomponent mixed dyes with a separation coefficient ranging from 1.8 to 36.5.The anionic TA-EGDE would be an effective adsorbent to remove and recycle dyes from the contaminated water. 展开更多
关键词 Tannic acid Water treatment Cationic dyes ADSORPTION Recovery dyes separation
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States of graphene oxide and surface functional groups amid adsorption of dyes and heavy metal ions
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作者 Zhaoyang Han Ling Sun +6 位作者 Yingying Chu Jing Wang Chenyu Wei Qianlei Jiang Changbao Han Hui Yan Xuemei Song 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2023年第11期197-208,共12页
Water pollution regarding dyes and heavy metal ions is crucial facing the world.How to effectively separate these contaminants from water has been a key issue.Graphene oxide(GO)promises the greenwater world as a long-... Water pollution regarding dyes and heavy metal ions is crucial facing the world.How to effectively separate these contaminants from water has been a key issue.Graphene oxide(GO)promises the greenwater world as a long-lasting spotlight adsorbent material and therefore,harnessing GO has been the research hotspot for over a decade.The state of GO as well as its surface functional groups plays an important role in adsorption.And the way of preparation and structural modification matters to the performance of GO.In this review,the significance of the state of existence of stock GO and surface functional groups is explored in terms of preparation,structural modification,and adsorption.Besides,various adsorbates for GO adsorption are also involved,the discussion of which is rarely established elsewhere. 展开更多
关键词 Stock graphene oxide Surface functional groups Existence state ADSORBATES Enhanced adsorption dyes
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Progress in research and application of vital dyes in chromovitrectomy
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作者 ZHANG Ke-ren LEI Chun-yan ZHANG Mei-xia 《Journal of Hainan Medical University》 2023年第4期74-78,共5页
Chromovitrectomy is a surgical method that uses intraocular dyes during vitreoretinal surgery to stain transparent tissues in the eye such as the posterior vitreous cortex,epiretinal membrane and inner limiting membra... Chromovitrectomy is a surgical method that uses intraocular dyes during vitreoretinal surgery to stain transparent tissues in the eye such as the posterior vitreous cortex,epiretinal membrane and inner limiting membrane for easy operation.It can avoid the intraocular complications associated with incomplete vitrectomy,incomplete epiretinal membrane peeling and incomplete internal limiting membrane peeling.At present,the commonly used vital dyes in clinic are as follows:indocyanine green,infracyanine green,triamcinolone acetonide,trypan blue,brilliant blue G.Indocyanine green was first used for intraocular staining,which can show the inner limiting membrane well.Following indocyanine green,trypan blue is used to identify idiopathic epiretinal membranes and triamcinolone acetonide is used to stain the vitreous.Recently,it has been discovered that natural dyes extracted from fruits,such as lutein and anthocyanins,are also used in intraocular vitrectomy.The main purpose of this review is to explore the research status and prospects of various intraocular stains in stained vitrectomy. 展开更多
关键词 Chromovitrectomy Vital dyes Indocyanine green Triamcinolone acetonide
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Adsorption of Anionic and Cationic Dyes from Textile Effluents by Activated Carbon Prepared from Sawdust and Fish Scale
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作者 Rumana A. Jahan Md. Mahedi Hassan +1 位作者 Ashequl Alam Rana Mohammad Mainul Karim 《Advances in Chemical Engineering and Science》 2023年第3期189-202,共14页
In Bangladesh, there are thousands of textile-dying industries spread across the country’s many regions, the majority of which involve knitting and dying. The dyeing industry uses an enormous quantity of water, as we... In Bangladesh, there are thousands of textile-dying industries spread across the country’s many regions, the majority of which involve knitting and dying. The dyeing industry uses an enormous quantity of water, as well as colors and chemicals. After the dying process has been completed, they also release a significant amount of wastewater. Cotton, wool, and polyester fiber are typically dyed with textile dyes such as reactive, acid, and disperse dyes. These dyes are utilized most frequently in the respective sectors. The dyes’ colorants are extremely poisonous and dangerous to all forms of life, including aquatic life and living things. The present work has been intended to investigate whether or not it is practicable to remove commonly used textile dyes simultaneously from an aqueous dye solution using an adsorption technique that makes use of a variety of different adsorbents. This study focuses on the removal of color from two distinct types of dyes—Methylene Blue and Reactive Blue-250 which are cationic and anionic in nature respectively, using two different types of activated carbon adsorbents prepared from sawdust and fish scale. Dye removal capacity was tested as a function of contact time, the dosage of the adsorbent, pH during the treatment process, temperature and initial concentration of dye. The applicability of the Langmuir and Freundlich adsorption isotherms in describing experimental data was investigated. The micro and mesoporous activated carbon prepared from sawdust and fish scale identified by Scanning Electron Microscopy (SEM) images indicated that such adsorbents with a large surface area have more dye adsorption potential whereas the variation in dye adsorption occurs due to variation in surface area. From the overall experimental data, maximum removal of 95.39% and 87.92% was found for Methylene Blue and Reactive Blue-250 respectively by sawdust, and 90.64% removal of Methylene Blue by using fish scale. 展开更多
关键词 Textile Wastewater Ionic dyes Removal Activated Carbon ADSORBENT
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Photocatalytic Degradation of Water-Soluble Dyes by LaCoO_3 被引量:2
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作者 杨秋华 傅希贤 秦永宁 《Transactions of Tianjin University》 EI CAS 2002年第2期83-86,共4页
Pervoskite type oxides LaCoO 3 was prepared by citrate method with the granula of 20 nm-30 nm. With a fluorescent Hg lamp or sunlight as irradiator, the degradation experiments of various water soluble dyes we... Pervoskite type oxides LaCoO 3 was prepared by citrate method with the granula of 20 nm-30 nm. With a fluorescent Hg lamp or sunlight as irradiator, the degradation experiments of various water soluble dyes were carried out in the suspension system of LaCoO 3 . The results show that the pervoskite type oxide LaCoO 3 has good photocatalytic activity.Studied by X ray photoelectron spectroscopy and photoacoustic spectra, its photocatalytic activity is found to be related with factors such as the d electron structure of ion Co 3+ ,Co—O binding energy and adsorbed oxygen on the surface etc. 展开更多
关键词 rare earths water soluble dye pervoskite type LaCoO 3 photocatalytic degradation
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潮-径相互作用下甬江总氮污染的降解、扩散及分布模拟
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作者 陈勤思 胡松 +3 位作者 王晓华 刘鹏霞 刘星 高照诠 《中国环境科学》 EI CAS CSCD 北大核心 2024年第1期344-351,共8页
基于非结构有限体积法海洋模式(FVCOM)建立了宁波—舟山海域的水动力模型,结合海域海水监测数据分析了区域内总氮浓度的分布情况及影响污染物输运的动力因素,进而采用表观降解系数方法在示踪物(DYE)模块中补充了浓度衰减机制,从而对甬... 基于非结构有限体积法海洋模式(FVCOM)建立了宁波—舟山海域的水动力模型,结合海域海水监测数据分析了区域内总氮浓度的分布情况及影响污染物输运的动力因素,进而采用表观降解系数方法在示踪物(DYE)模块中补充了浓度衰减机制,从而对甬江入海总氮污染物在2021年丰水期条件下的降解、扩散及分布进行了模拟分析.模拟结果表明,甬江输入到宁波—舟山海域的总氮污染物是造成2021年夏季宁波市镇海区、北仑区近岸海域海水总氮浓度出现高值的重要因素.在潮汐和甬江径流的共同作用下,甬江输入到宁波—舟山海域的总氮污染物将在短期内显著影响到宁波市镇海区东部和北部海域海水质量.以2021年夏季为例,考虑降解过程后,模拟结果显示甬江输入的总氮污染物在90d内使宁波市近岸站位海水总氮浓度增加约0.7mg/L. 展开更多
关键词 非结构有限体积法海洋模式(FVCOM) 示踪物(DYE) 甬江 总氮 表观降解系数 数值模拟
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Photocatalytic application of magnesium spinel ferrite in wastewater remediation:A review
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作者 Rohit Jasrotia Nikhil Jaswal +3 位作者 Jyoti Prakash Chan Choon Kit Jagpreet Singh Abhishek Kandwal 《Journal of Magnesium and Alloys》 SCIE EI CAS CSCD 2024年第2期490-505,共16页
This review paper explores the efficacy of magnesium ferrite-based catalysts in photocatalytic degradation of organic contaminates(antibiotic and dyes).We report the influence of different doping strategies,synthesis ... This review paper explores the efficacy of magnesium ferrite-based catalysts in photocatalytic degradation of organic contaminates(antibiotic and dyes).We report the influence of different doping strategies,synthesis methods,and composite materials on the degradation efficiency of these pollutants.Our analysis reveals the versatile and promising nature of magnesium ferrite-based catalysts,offering the valuable insights into their practical application for restoring the environment.Due to the smaller band gap and magnetic nature of magnesium ferrite,it holds the benefit of utilising the broader spectrum of light while also being recoverable.The in-depth analysis of magnesium ferrites'photocatalytic mechanism could lead to the development of cheap and reliable photocatalyst for the wastewater treatment.This concise review offers a thorough summary of the key advancements in this field,highlighting the pivotal role of the magnesium ferrite based photocatalysts in addressing the pressing global issue of organic pollutants in wastewater. 展开更多
关键词 Magnesium ferrite WASTEWATER dyes ANTIBIOTICS Photocatalytic degradation
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Progress and prospects of Mg-based amorphous alloys in azo dye wastewater treatment
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作者 Yanan Chen Fengchun Chen +5 位作者 Liang Li Chen Su Bo Song Hongju Zhang Shengfeng Guo Fusheng Pan 《Journal of Magnesium and Alloys》 SCIE EI CAS CSCD 2024年第3期873-889,共17页
Mg-based amorphous alloys exhibit efficient catalytic performance and excellent biocompatibility with a promising application probability,specifically in the field of azo dye wastewater degradation.However,the problem... Mg-based amorphous alloys exhibit efficient catalytic performance and excellent biocompatibility with a promising application probability,specifically in the field of azo dye wastewater degradation.However,the problems like difficulty in preparation and poor cycling stability need to be solved.At present,Mg-based amorphous alloys applied in wastewater degradation are available in powder and ribbon.The amorphous alloy powder fabricated by ball milling has a high specific surface area,and its reactivity is thousands of times better than that of gas atomized alloy powder.But the development is limited due to the high energy consumption,difficult and costly process of powder recycling.The single roller melt-spinning method is a new manufacturing process of amorphous alloy ribbon.Compared to amorphous powder,the specific surface area of amorphous ribbon is relatively lower,therefore,it is necessary to carry out surface modification to enhance it.Dealloying is a way that can form a pore structure on the surface of the amorphous alloys,increasing the specific surface area and providing more reactive sites,which all contribute to the catalytic performance.Exploring the optimal conditions for Mg-based amorphous alloys in wastewater degradation by adjusting amorphous alloy composition,choosing suitable method to preparation and surface modification,reducing cost,expanding the pH range will advance the steps to put Mg-based amorphous alloys in industrial environments into practice. 展开更多
关键词 Mg-based amorphous alloys Azo dyes DEALLOYING Surface modification Wastewater degradation.
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Simple substituents make big differences in photophysical performances of 2,1,3-benzothiadizole-conjugated spiropyrans
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作者 Xiaoming Zhu Yunting Liu +1 位作者 Mingyue Cao Guangle Niu 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2024年第8期53-59,共7页
Developing multifunctional spiropyran dyes is of particular importance in diverse applications.In the present study,we synthesized two 2,1,3-benzothiadiazole-conjugated spiropyrans(BT-SP-NO2and BTSP-NMe2)with distinct... Developing multifunctional spiropyran dyes is of particular importance in diverse applications.In the present study,we synthesized two 2,1,3-benzothiadiazole-conjugated spiropyrans(BT-SP-NO2and BTSP-NMe2)with distinct substituents.These donor-acceptor-structured spiropyrans exhibited typical twisted intramolecular charge transfer features and strong emissions in low-polarity solvents with fluorescence quantum yields(QYs)of up to 90.7%.Like traditional spiropyrans,the electron-acceptor-substituted BT-SP-NO2exhibited excellent photochromic behavior under multiple alternating UV—Vis irradiation,while the electron-donor-substituted BT-SP-NMe2was an acidochromic dye.In addition,the substituent groups distinctly affected the packing modes of these spiropyrans in the solid state.BTSP-NMe2showed a much stronger solid-state emission(QY of 59.0%)than BT-SP-NO2.Moreover,these two dyes were utilized as biocompatible probes for the specific light-up imaging of lipid droplets. 展开更多
关键词 SPIROPYRAN 2 1 3-Benzothiadiazole PHOTOCHROMISM Fluorescent dye Fluorescence imaging
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Experimental and computational study of annealed nickel sulfide quantum dots for catalytic and antibacterial activity
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作者 Muhammad Ikram Sawaira Moeen +5 位作者 Ali Haider Anwar Ul-Hamid Haya Alhummiany Hamoud H.Somaily Souraya Goumri-Said Mohammed Benali Kanoun 《Nano Materials Science》 EI CAS CSCD 2024年第3期355-364,共10页
This research investigates the hydrothermal synthesis and annealing duration effects on nickel sulfide(NiS_(2) quantum dots(QDs)for catalytic decolorization of methylene blue(MB)dye and antimicrobial efficacy.QD size ... This research investigates the hydrothermal synthesis and annealing duration effects on nickel sulfide(NiS_(2) quantum dots(QDs)for catalytic decolorization of methylene blue(MB)dye and antimicrobial efficacy.QD size increased with longer annealing,reducing catalytic activity.UV–vis,XRD,TEM,and FTIR analyses probed optical structural,morphological,and vibrational features.XRD confirmed NiS2's anorthic structure,with crystallite size growing from 6.53 to 7.81 nm during extended annealing.UV–Vis exhibited a bathochromic shift,reflecting reduced band gap energy(Eg)in NiS_(2).TEM revealed NiS_(2)QD formation,with agglomerated QD average size increasing from 7.13 to 9.65 nm with prolonged annealing.Pure NiS_(2) showed significant MB decolorization(89.85%)in acidic conditions.Annealed NiS_(2) QDs demonstrated notable antibacterial activity,yielding a 6.15mm inhibition zone against Escherichia coli(E.coli)compared to Ciprofloxacin.First-principles computation supported a robust interaction between MB and NiS_(2),evidenced by obtained adsorption energies.This study highlights the nuanced relationship between annealing duration,structural changes,and functional properties in NiS_(2)QDs,emphasizing their potential applications in catalysis and antibacterial interventions. 展开更多
关键词 NiS_(2) ANTIBACTERIAL quantum dots DYE degradation DFT
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Ultra-high specific surface area activated carbon from Taihu cyanobacteria via KOH activation for enhanced methylene blue adsorption
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作者 Yifang Mi Wenqiang Wang +4 位作者 Sen Zhang Yalong Guo Yufeng Zhao Guojin Sun Zhihai Cao 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2024年第3期106-116,共11页
Cyanobacteria-based activated carbon(CBAC)was successfully prepared by pyrolysis-activation of Taihu cyanobacteria.When the impregnation ratio and activated temperature were 2 and 800-C,respectively,the optimal CBACs ... Cyanobacteria-based activated carbon(CBAC)was successfully prepared by pyrolysis-activation of Taihu cyanobacteria.When the impregnation ratio and activated temperature were 2 and 800-C,respectively,the optimal CBACs possessed an ultra-high specific surface(2178.90 m^(2)·g^(-1))and plenty of micro-and meso-pores,as well as a high pore volume(1.01 cm^(3)·g^(-1)).Ascribed to ultra-high surface area,π-π interaction,electrostatic interaction,as well as hydrogen-bonding interactions,the CBACs displayed huge superiority in efficient dye removal.The saturated methylene blue adsorption capacity by CBACs could be as high as 1143.4 mg·g^(-1),superior to that of other reported biomass-activated carbons.The adsorption was endothermic and modeled well by the pseudo-second-order kinetic,intra-particle diffusion,and Langmuir models.This work presented the effectiveness of Taihu cyanobacteria adsorbent ascribed to its super large specific surface area and high adsorption ability. 展开更多
关键词 Activated carbon BIOMASS Dye adsorption Taihu cyanobacteria
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Magnesium oxide(MgO)nanoadsorbents in wastewater treatment:A comprehensive review
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作者 H.C.S.Perera V.Gurunanthanan +3 位作者 Anoop Singh M.M.M.G.P.G.Mantilaka G.Das Sandeep Arya 《Journal of Magnesium and Alloys》 SCIE EI CAS CSCD 2024年第5期1709-1773,共65页
Wastewater contamination by heavy metals and synthetic dyes presents a significant environmental challenge,necessitating effective and sustainable separation techniques.This review article provides a detailed examinat... Wastewater contamination by heavy metals and synthetic dyes presents a significant environmental challenge,necessitating effective and sustainable separation techniques.This review article provides a detailed examination of magnesium oxide(MgO)nanoparticles as an innovative nanoadsorbent for wastewater treatment,with a specific focus on heavy metal and dye removal.The review comprehensively explores various aspects of MgO nanoparticles,including their structural characteristics and synthesis techniques.The article delves into the morphology and crystallographic arrangement of MgO nanoparticles,offering insights into their structural attributes.Given the complexity of adsorption processes,the review identifies and analyzes parameters influencing the adsorption efficiency of MgO nanoparticles,such as temperature,pH,contact time,initial concentration,and co-existing ions.The interplay between these parameters and the adsorption capability of MgO nanoparticles emphasizes the importance of optimizing operational conditions.Furthermore,the review assesses various synthesis methods for MgO nanoparticles,including sol-gel,hydrothermal,precipitation,green synthesis,solvothermal,and template-assisted techniques.It discusses the advantages,limitations,and resulting nanoparticle characteristics of each method,enabling readers to grasp the implications of synthesis processes on adsorption efficiency.This comprehensive review consolidates current insights into the effectiveness of MgO nanoparticles as a potent nanoadsorbent for removing heavy metals and dyes from wastewater covering a wide spectrum of aspects related to MgO nanoparticles.Moreover,there is a need to investigate the use of MgO in the treatment of actual wastewater or river water,in order to leverage its cost-effectiveness and high efficiency for practical water treatment applications in real-time. 展开更多
关键词 MgO nanoparticles Nanoadsorbent Wastewater treatment Heavy metals Dye separation ADSORPTION Synthesis methods
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Progress in the research on organic piezoelectric catalysts for dye decomposition
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作者 Zhaoning Yang Xiaoxin Shu +3 位作者 Di Guo Jing Wang Hui Bian Yanmin Jia 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2024年第2期245-260,共16页
Organic contaminants have posed a direct and substantial risk to human wellness and the environment.In recent years,piezo-electric catalysis has evolved as a novel and effective method for decomposing these contaminan... Organic contaminants have posed a direct and substantial risk to human wellness and the environment.In recent years,piezo-electric catalysis has evolved as a novel and effective method for decomposing these contaminants.Although piezoelectric materials offer a wide range of options,most related studies thus far have focused on inorganic materials and have paid little attention to organic materi-als.Organic materials have advantages,such as being lightweight,inexpensive,and easy to process,over inorganic materials.Therefore,this paper provides a comprehensive review of the progress made in the research on piezoelectric catalysis using organic materials,high-lighting their catalytic efficiency in addressing various pollutants.In addition,the applications of organic materials in piezoelectric cata-lysis for water decomposition to produce hydrogen,disinfect bacteria,treat tumors,and reduce carbon dioxide are presented.Finally,fu-ture developmental trends regarding the piezoelectric catalytic potential of organic materials are explored. 展开更多
关键词 piezoelectric catalysis piezoelectric material dye decomposition organic materials
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The Adsorption Properties of TEMPO Oxidized Cellulose against the Mixture of Methylene Blue and Rhemazol Yellow FG
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作者 I.Putu Mahendra Kartika Dinita 《Journal of Renewable Materials》 EI CAS 2024年第8期1369-1382,共14页
TEMPO/NaOCl/NaBr treatment significantly increased the number of negative charges on the cellulose surface.Two concentrations of NaOCl,5 and 30 mmol/g of cellulose,were used in this study.The number of carboxyl groups... TEMPO/NaOCl/NaBr treatment significantly increased the number of negative charges on the cellulose surface.Two concentrations of NaOCl,5 and 30 mmol/g of cellulose,were used in this study.The number of carboxyl groups in the two cellulosic samples oxidized using TEMPO/NaOCl/NaBr was 0.5160 and 1.8461 mmol/g of cellulose,respectively.The oxidized cellulose samples treated with 5 and 30 mmol/g NaOCl exhibited higher crystallinity,at 81.15%and 80.14%,respectively,compared to untreated cellulose,which had a crystallinity of 75.95%.The pH effect indicated that the highest adsorption capacity for methylene blue was achieved under alkaline conditions(pH 9),while the highest adsorption capacity for rhemazol yellow FG was achieved under acidic conditions.The kinetic model of TEMPO-oxidized cellulose for methylene blue and rhemazol yellow FG conformed to the pseudo-second-order model.The initial concentration parameter revealed that the isotherm model for the adsorption of methylene blue and rhemazol yellow FG by TEMPO-oxidized cellulose conformed to the Langmuir model.The dye removal efficiencies for methylene blue and rhemazol yellow FG using TEMPOoxidized cellulose(30 mmol/g)were approximately 80.17%and 59.52%,respectively.These results demonstrate that TEMPO/NaOCl/NaBr-oxidized samples can effectively separate cationic and anionic dye mixtures.Furthermore,the use of TEMPO-oxidized cellulose showed good regeneration capability,maintaining more than 95%of its adsorption capacity after 8 cycles. 展开更多
关键词 CELLULOSE TEMPO oxidation cationic and anionic dyes dye separation
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Adsorption of Malachite Green Using Activated Carbon from Mangosteen Peel: Optimization Using Box-Behnken Design
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作者 Nabila Eka Yuningsih Latifa Ariani +4 位作者 Suprapto Suprapto Ita Ulfin Harmami Harmami Hendro Juwono Yatim Lailun Ni’mah 《Journal of Renewable Materials》 EI CAS 2024年第5期981-992,共12页
In this research,activated carbon from mangosteen peel has been synthesized using sulfuric acid as an activator.The adsorption performance of the activated carbon was optimized using malachite green dye as absorbate.M... In this research,activated carbon from mangosteen peel has been synthesized using sulfuric acid as an activator.The adsorption performance of the activated carbon was optimized using malachite green dye as absorbate.Mala-chite green dye waste is a toxic and non-biodegradable material that damages the environment.Optimization of adsorption processes was carried out using Response Surface Methodology(RSM)with a Box-Behnken Design(BBD).The synthesized activated carbon was characterized using FTIR and SEM instruments.The FTIR spectra confirmed the presence of a sulfonate group(-SO_(3)H)in the activated carbon,indicating that the activation pro-cess using sulfuric acid was successful.SEM characterization shows that activated carbon has porous morphology.Optimization was carried out for three adsorption parameters,namely contact time(20,60,and 120 min),adsor-bent mass(0.005,0.025,and 0.05 g),and initial concentration of malachite green solution(5,50,and 100 mg·L^(-1)).The concentration of the malachite green solution was determined using a UV-Vis spectrophotometer at the max-imum wavelength of malachite green,618 nm.The optimum of malachite green adsorption using mangosteen peel activated carbon was obtained at a contact time of 80 min,an adsorbent mass of 0.032 g,and malachite green initial concentration of 25 mg·L^(-1),with a maximum removal percentage and maximum adsorption capacity of 93.66%and 19.345 mg·g^(-1),respectively. 展开更多
关键词 Response surface methodology dyes activated carbon experimental design
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