期刊文献+
共找到23篇文章
< 1 2 >
每页显示 20 50 100
Ecological Behavior of Linear Alkylbenzene Sulfonate (LAS) in Soil-Plant Systems 被引量:17
1
作者 JIALiang-Qing OUZi-Qing OUYANGZhi-Yun 《Pedosphere》 SCIE CAS CSCD 2005年第2期216-224,共9页
More and more linear alkylbenzene sulfonate (LAS) has contaminated the water and soil ma pollution discharge, making it important to identify the ecological behavior and toxicity of LAS so as to carry out measures tha... More and more linear alkylbenzene sulfonate (LAS) has contaminated the water and soil ma pollution discharge, making it important to identify the ecological behavior and toxicity of LAS so as to carry out measures that will reduce its negative effects on the ecosystem. The ecological behavior of LAS. including degradation, migration, and plant uptake, in both soil-paddy rice and soil-soybean systems was studied. Reduction of LAS in pot and field plots followed the first order reaction kinetics with degradation half-lives of 35-50 days with LAS decreasing to very low concentrations after a season of crop growth. Strong migration ability for LAS was found and the breakthrough time in a 1.5 in soil monolith was significantly shortened to 23 days by preferential flow. Leachate volumes of soil-paddy and soil-soybean systems at preferential breakthrough were much different, while the leachate volumes at equilibrium governed by soil adsorption/desorption processes were very similar. Significant uptake of LAS in both paddy rice and sovbeans was observed in pot and field experiments (P < 0.05). In aquatic culture, 20 μg mL-1 and above of LAS significantly inhibited the growth of paddy seedlings (P < 0.05). The critical concentration for LAS in soil inhibiting the growth and yield of paddy was 160 μg g-1; when higher, there was a strong negative influence, with decreases in height, spike length, and production, when lower than 80 μg g-1, paddy growth was stimulated. There was little effect of LAS on soybeans. 展开更多
关键词 DEGRADATION ecological behavior linear alkylbenzene sulfonate MIGRATION preferential flow
下载PDF
Simulation of Suspension Catalytic Distillation for Synthesis of Linear Alkylbenzene 被引量:3
2
作者 王二强 李成岳 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2003年第5期520-525,共6页
Suspension catalytic distillation (SCD) has been developed recently as an innovative technology in catalytic distillation. In this paper, a brief introduction to SCD is given and an equilibrium stage (EQ) modei is dev... Suspension catalytic distillation (SCD) has been developed recently as an innovative technology in catalytic distillation. In this paper, a brief introduction to SCD is given and an equilibrium stage (EQ) modei is developed to simulate this new process for synthesis of linear alkylbenzene (LAB) from benzene and 1-dodecene. Since non-ideality of this reaction systern is not strong, EQ modei developed could be applied to it successfully. Simulation results agree well with experimental data, and indicate some characteristics of SCD process as an advanced technology for the production of LAB: 100% conversion of olefins, low temperature (90-100℃) and low benzene/olefin mole ratio. 展开更多
关键词 suspension catalytic distillation equilibrium stage model linear alkylbenzene
下载PDF
Surfactant Linear Alkylbenzene Sulfonate Effect on Soil Cd Fractions and Cd Distribution in Soybean Plants in a Pot Experiment 被引量:2
3
作者 ZHANG Yong LIAO Bo-Han +2 位作者 ZENG Qing-Ru ZENG Min LEI Ming 《Pedosphere》 SCIE CAS CSCD 2008年第2期242-247,共6页
A pot experiment was conducted to study the effect of an anionic surfactant linear alkylbenzene sulfonate(LAS) application on cadmium(Cd)fractions in soils and Cd distribution in different tissues of soybean(Glycine m... A pot experiment was conducted to study the effect of an anionic surfactant linear alkylbenzene sulfonate(LAS) application on cadmium(Cd)fractions in soils and Cd distribution in different tissues of soybean(Glycine max)plants as well as soil pH.Soil samples were treated with three levels of Cd(0,5,and 10 mg kg^(-1))and five levels of LAS(0,5, 15,50,and 100 mg L^(-1)).Results indicated that compared to the control soils(no Cd and no LAS treatment),soil pH increased and available Cd decreased in the soil treated with external Cd and watered with LAS solutions.Meanwhile, soil exchangeable Cd and Cd bound to carbonates decreased;Cd bound to amorphous iron and manganese oxides and Cd bound to organic matter increased.In addition,LAS application could reduce enrichment of Cd in soybean plants, resulting in decreased Cd in the soybean plants.Thus,suitable LAS application could decrease bioavailability and mobility of soil Cd. 展开更多
关键词 cadmium bioavailability cadmium fractions linear alkylbenzene sulfonate SOIL SOYBEAN
下载PDF
Effect of Dermal Exposure to Paraphenylenediamine and Linear Alkylbenzene Sulphonate in Guinea Pigs 被引量:2
4
作者 A. K. MATHUR R. B. RAIZADA +1 位作者 M. K. SRIVASTAVA A. SINGH 《Biomedical and Environmental Sciences》 SCIE CAS CSCD 2005年第4期238-240,共3页
To study the effects of paraphenylenediamine (PPD) and linear alkylbenzene sulphonate (LAS) alone and in combination on the skin. Methods Forty-eight guinea pigs were divided equally into 4 groups and exposed to P... To study the effects of paraphenylenediamine (PPD) and linear alkylbenzene sulphonate (LAS) alone and in combination on the skin. Methods Forty-eight guinea pigs were divided equally into 4 groups and exposed to PPD (4 mg/kg), LAS (12 mg/kg) and PPD (4 mg/kg) plus LAS (12 mg/kg) for 30 days. The biochemical parameters such as acid phosphatase, gtutathione-s-transferase, glutathione peroxidase, glutathione, lipid peroxidafion and histamine contents in exposed skin were estimated. The histopathological examination of the exposed skin was also carried out. Results The skin enzymes, lipid peroxidation, and histamine increased while glutathione decreased in skin. The simultaneously exposed group showed additive toxic effects. The histopathological examination showed severe hyperkeratosis, thickening of collagen fibres and vacuolisation of epidermal cells in PPD plus LAS exposed skin. Conclusion The findings of the present study suggest that simultaneous exposure to PPD and LAS has additive toxic effects. 展开更多
关键词 DERMAL PARAPHENYLENEDIAMINE Linear alkylbenzene sulphonate ENZYMES HISTOPATHOLOGY
下载PDF
Kinetic Model of Hydrogenation for Removal of Trace Olefins from Alkylation Mixture Formed during Linear Alkylbenzene Synthesis 被引量:1
5
作者 Ren Jie Liu Bing Shen Lian 《China Petroleum Processing & Petrochemical Technology》 SCIE CAS 2019年第1期46-54,共9页
Through the hydrogenation experiments for removal of olefin impurities in effluent mixture obtained from alkylation reactor for linear alkylbenzene synthesis, the reaction kinetics was studied. The experimental result... Through the hydrogenation experiments for removal of olefin impurities in effluent mixture obtained from alkylation reactor for linear alkylbenzene synthesis, the reaction kinetics was studied. The experimental results showed that the catalytic activity of Pd/Al2 O3 among four kinds of catalysts was the highest, and the olefin conversion reached 100%when the reaction temperature was higher than 140 ℃. The kinetic model was established through parameters estimation.The experimental validation of the kinetic model showed that the kinetic model had higher simulation accuracy. The results of prediction by the kinetic model indicated that with the intensification of reaction conditions, the olefin conversion would increase and the bromine index of the linear alkyl benzene would decrease. Under the conditions covering a WHSV of 2.0 h^(-1),a temperature of 90 ℃, and a hydrogen partial pressure of 1.5 MPa, the olefin conversion was 99.67%, and the bromine index of the linear alkyl benzene could be reduced to less than 20.00 mgBr/(100 g). 展开更多
关键词 HYDROGENATION reaction kinetics linear alkylbenzene REMOVAL of olefin impurity BROMINE index
下载PDF
OXIDATION OF ALKYLBENZENES CATALYZED BY IRON( Ⅱ,Ⅲ)-1,10-PHENANTHROLINE AND 2, 2'-BIPYRIDINE COMPLEXES 被引量:1
6
作者 Zi Qiang LEI Yun Pu WANG 《Chinese Chemical Letters》 SCIE CAS CSCD 1993年第1期21-22,共2页
Oxidation of alkybenzenes PhCH_2R(R=H, CH_3, C_2H_5 and n-C_3H_7) under 1 atm. of O_2 or air catalyzed by iron(Ⅱ, Ⅲ)-2,2'-bipyridine and 1,10-phenanthroline complexes, affords the aryl-substituted ketones and al... Oxidation of alkybenzenes PhCH_2R(R=H, CH_3, C_2H_5 and n-C_3H_7) under 1 atm. of O_2 or air catalyzed by iron(Ⅱ, Ⅲ)-2,2'-bipyridine and 1,10-phenanthroline complexes, affords the aryl-substituted ketones and alcohols with the conversion of 15.00%~34.58% containing of 97.60%~99.80% ketones and alcohols. The turnover numbers of these catalysts are over 3500 mol-cat. ^(-1)for 3.5 h. 展开更多
关键词 PHENANTHROLINE AND 2 BIPYRIDINE COMPLEXES OXIDATION OF alkylbenzeneS CATALYZED BY IRON
下载PDF
Linear Alkylbenzene Sulfonates in the Groundwater and Surface Waters: Ergene Basin Case Study 被引量:1
7
作者 Fusun Ekmekyapar Zebra Barut 《Journal of Agricultural Science and Technology(A)》 2017年第6期369-376,共8页
Ergene Basin is one of the most important industrial centers due to the geographical location in Turkey. Uncontrolled and rapidly increasing industrialization brings together a large number of environmental problems i... Ergene Basin is one of the most important industrial centers due to the geographical location in Turkey. Uncontrolled and rapidly increasing industrialization brings together a large number of environmental problems in the basin. In this study, pollution was investigated in the water samples taken at time intervals and different parts of groundwater and surface water resources located within Ergene Basin by methylene blue anionic surfactants (MBAS) analysis method. Turbidity, temperature, pH, electrical conductivity (EC), concentrations of total P and linear alkylbenzene sulfonates (LAS) were simultaneously determined in the investigated water resources. The results were compared with the Turkish Water Pollution Control Regulation specified in the Quality Criteria of the Inland Water Resources according to their class. The total P and LAS concentrations of surface waters are generally higher than groundwater. In terms of LAS concentrations, the groundwater is Ⅰ-Ⅱ class and the surface water is Ⅱ-Ⅳ class. 展开更多
关键词 Surface water GROUNDWATER surfactant pollution linear alkylbenzene sulfonates methylene blue anionic surfactants
下载PDF
Synthesis of Linear Alkylbenzene in a Novel Liquid-Solid Circulating Moving Bed Reactor
8
作者 韩明汉 徐聪 +1 位作者 崔哲 金涌 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2004年第3期379-383,共5页
For the alkylation of benzene with long-chain olefins, using Hβzeolite catalyst as replacement of HF or AlCl3 has the advantages of no corrosion, less environmental pollution, and much more 2-phenyl isomer, which has... For the alkylation of benzene with long-chain olefins, using Hβzeolite catalyst as replacement of HF or AlCl3 has the advantages of no corrosion, less environmental pollution, and much more 2-phenyl isomer, which has the highest biodegradability and solubility, and better detergent properties among the related isomers. The characterization of the coke shows that the deactivation of catalyst is caused by the jam of bulkier molecules, such as naphthalene, indane and linear alkylbenzenes, which are too big to move quickly in the intracrystalline pores of catalyst. The deactivated catalyst can be regenerated by benzene washing at higher temperature. To make the processes of reaction and regeneration continuous, a novel moving bed reactor is developed. Comparing with the processes with fixed bed reactors, the processes in this work have the advantages of continuous operation, low temperature, low pressure, low mole ratio of benzene to olefins, and high weight hourly space velocity. 展开更多
关键词 β zeolite ALKYLATION linear alkylbenzene moving bed reactor
下载PDF
Two Copper Complexes Based on Pyrazole-3-carboxylic Acid as Heterogeneous Catalysts for Highly Selective Oxidation of Alkylbenzenes
9
作者 蒋秀燕 荣念新 +3 位作者 钱瑞 邱田田 姚清侠 黄现强 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2018年第2期329-337,共9页
Two new copper complexes based on pyrazole-3-carboxylic acid (H2pca) ligand, Cu(Hpca)2(H2O)2?2H2O (1) and Cu2(pca)2(H2O)4 (2) have been synthesized and fully characterized by single-crystal X-ray diffra... Two new copper complexes based on pyrazole-3-carboxylic acid (H2pca) ligand, Cu(Hpca)2(H2O)2?2H2O (1) and Cu2(pca)2(H2O)4 (2) have been synthesized and fully characterized by single-crystal X-ray diffraction (SXRD), infrared spectroscopy (IR), thermal gravity analysis (TGA), powder X-ray diffraction (PXRD) and elemental analyses. Complex 1 is mononuclear while complex 2 shows a dinuclear structure. Complex 1 crystallizes in the monoclinic system, space group P21/c with Z = 2, a = 6.5591(5), b = 21.696(2), c = 4.9486(2) ?, V = 680.94(9) ?3, F(000) = 366, Dc = 1.745 g/cm3, μ = 1.650 mm-1, the final R = 0.0340 and wR = 0.0792. Complex 2 crystallizes in the monoclinic system, space group P21/n with Z = 2, a = 5.1935(4), b = 9.6052(7), c = 12.7347(9) ?, V = 634.44(8) ?3, F(000) = 420, Dc = 2.195 g/cm3, μ = 3.404 mm-1, the final R = 0.0305 and wR = 0.0653. The three-dimensional frameworks of two complexes are formed by the O?H???O and N?H???O hydrogen bonding interactions. Notably, two copper complexes are further used as catalysts in the oxidation of alkylbenzenes using t-butylhydroperoxide (TBHP) as the oxidant and they exhibit excellent catalytic performance (Conv. up to 98.9%, Sele. up to 98.7%). 展开更多
关键词 copper complexes crystal structure oxidation of alkylbenzenes
下载PDF
Alkylbenzene Project in Xinjiang Approved
10
作者 Zhou Weiyong(Refining & Chemicals Bureau,CNPC) 《China Oil & Gas》 CAS 1996年第1期44-44,共1页
AlkylbenzeneProjectinXinjiangApprovedZhouWeiyong(Refining&ChemicalsBureau,CNPC)Thefeasibilitystudyonalkylben... AlkylbenzeneProjectinXinjiangApprovedZhouWeiyong(Refining&ChemicalsBureau,CNPC)ThefeasibilitystudyonalkylbenzeneprojectinDush... 展开更多
关键词 PROJECT alkylbenzene Project in Xinjiang Approved
下载PDF
Experimental Study of the Effect of Strong Alkali on Lowering the Interfacial Tension of Oil/Heavy Alkylbenzene Sulfonates System
11
作者 刘必心 侯吉瑞 +2 位作者 唐红娇 徐海霞 郑自刚 《Chinese Journal of Chemistry》 SCIE CAS CSCD 2011年第11期2315-2319,共5页
Experimental studies were conducted to explore the fundamental mechanisms of alkali to lower the interfacial tension of oil/heavy alkylbenzene sulfonates (HABS) system. Sodium hydroxide was used as the strong alkali... Experimental studies were conducted to explore the fundamental mechanisms of alkali to lower the interfacial tension of oil/heavy alkylbenzene sulfonates (HABS) system. Sodium hydroxide was used as the strong alkali chemical to investigate the interracial tension (IFT) of oil/HABS system. The influences of salt and alkali on the interracial activity were studied by the measurement of interfacial tension and partition coefficient. Moreover, the al- kali/surfactant solutions were measured by dynamic laser scattering. The results showed that compared with the salt, the function of alkali to lower the interfacial tension and improve partition coefficient is more significant. The mi- celles formed by surfactants could be disaggregated because of adding alkali, so the size of micelles decreases and the number of mono-surfactants increases, then more surfactant molecules move to the interface of oil/surfactant system and the adsorption of surfactants at oil-water interfaces increases, which can lead to the decrease of IFT. 展开更多
关键词 alkali metal heavy alkylbenzene sulfonates interfacial tension partition coefficient micelles
原文传递
Studies on Degradation Characteristic of LAS High-resistance Strain 被引量:3
12
作者 陈宏伟 朱蕴兰 +4 位作者 苏贤岩 邵影 梁峙 曹泽红 林进 《Agricultural Science & Technology》 CAS 2007年第3期33-37,共5页
A IAS degradation strain with high resistance, which could take linear alkylbenzene sulphonate (LAS) as only carton origin for growth, was isolated from the drain canal of Hangao Detergent Plant of Xuzhou. The chara... A IAS degradation strain with high resistance, which could take linear alkylbenzene sulphonate (LAS) as only carton origin for growth, was isolated from the drain canal of Hangao Detergent Plant of Xuzhou. The characteristic of its degradation was researched and the results showed that the optimum conditions of this strain for degrading LAS were 30℃, pH 6.0, 150 ml solution in 500 ml triangle vase, 120 r/min, LAS concentration of 200 - 600 mg/L. The growth amount of the bacteria were up to 0. 443 ( OD400 ) and the degrading rate was up to 89.4%. The ability of the bacterium to degrade LAS could be as high as concentration of 1 200 mg/L. 展开更多
关键词 Linear alkylbenzene sulphonate (LAS) SURFACTANT Degradation strain ISOLATION BIODEGRADATION
下载PDF
Effects of temperature and surfactants on naphthalene and phenanthrene sorption by soil 被引量:15
13
作者 ZHANG Jinghuan ZENG Jianhui HE Mengchang 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2009年第5期667-674,共8页
Adsorption experiments were carried out to investigate the sorption behaviors of naphthalene and phenanthrene in six different soils and to determine the effects of temperature, linear alkylbenzene sulfonate (LAS) a... Adsorption experiments were carried out to investigate the sorption behaviors of naphthalene and phenanthrene in six different soils and to determine the effects of temperature, linear alkylbenzene sulfonate (LAS) and cetylrimethyl ammonium bromide (CTAB) on sorption. The results show that for a given sorbent phenanthrene exhibited greater nonlinear and stronger sorption than naphthalene. There was a strong negative correlation for the Koc values with organic carbon content (foc). The increase of temperature was not favorable to sorption. Sorption decreased along with the increasing aqueous LAS concentration from 0 to 1000 mg/L. At low CTAB concentration (〈 100 mg/L), the adsorption increased as CTAB hemimicelles formed on the soil surface. At high concentration, CTAB decreased the adsorption by occupying active hydrophobic adsorption sites and solubilization of naphthalene and phenanthrene. 展开更多
关键词 NAPHTHALENE PHENANTHRENE SORPTION SOIL TEMPERATURE linear alkylbenzene sulfonate cetylrimethyl ammonium bromide
下载PDF
Using monochromatic light to measure attenuation length of liquid scintillator solvent LAB 被引量:2
14
作者 Rui Zhang De-Wen Cao +4 位作者 Chang-Wei Loh You-Hang Liu Fang-Liang Wu Jia-Liang Zhang Ming Qi 《Nuclear Science and Techniques》 SCIE CAS CSCD 2019年第2期11-18,共8页
Linear alkylbenzene(LAB) will be used as solvent for the liquid scintillator in the central detector of Jiangmen Underground Neutrino Observatory. The sheer size of the detector imposes significant challenges and the ... Linear alkylbenzene(LAB) will be used as solvent for the liquid scintillator in the central detector of Jiangmen Underground Neutrino Observatory. The sheer size of the detector imposes significant challenges and the necessity to further improve the optical transparency of high-quality LAB. In order to study high optical transparencies, we continuously improve our measurement setup and use monochromatic light to measure the attenuation lengths of LAB samples. Moreover, the effects of organic impurities on LAB samples are studied to understand their interaction mechanisms and further improve the optical transparency of LAB. 展开更多
关键词 NEUTRINO detector Linear alkylbenzene Light ABSORPTION
下载PDF
Nafion/SiO_2 Nanocomposites:High Potential Catalysts for Alkylation of Benzene with Linear C_9-C_(13) Alkenes 被引量:1
15
作者 HaiWANG MingHanHAN 《Chinese Chemical Letters》 SCIE CAS CSCD 2002年第11期1121-1124,共4页
High surface area Nafion/SiO2 nanocomposites with nano-sized Nafion resin particles entrapped and dispersed within the highly porous silica matrix exhibited significantly enhanced activity, high selectivity and long-t... High surface area Nafion/SiO2 nanocomposites with nano-sized Nafion resin particles entrapped and dispersed within the highly porous silica matrix exhibited significantly enhanced activity, high selectivity and long-term stability for the alkylation of benzene with linear C9-C13 alkenes owing to the increased accessibility of Nafion resin-based acid sites to reactants. 展开更多
关键词 Nafion/SiO2 nanocomposites Friedel-Crafts alkylation linear alkylbenzenes.
下载PDF
Commercial Laundry Water Characterisation 被引量:3
16
作者 J.K.Braga M.B.A.Varesche 《American Journal of Analytical Chemistry》 2014年第1期8-16,共9页
Surfactants are the major active ingredients of laundry detergents. Therefore, special attention should be focused on the treatment and disposal of laundry wastewater. The aim of this study was to characterise the was... Surfactants are the major active ingredients of laundry detergents. Therefore, special attention should be focused on the treatment and disposal of laundry wastewater. The aim of this study was to characterise the wastewater from a commercial laundry over 30 days. Physicochemical analyses were performed, monitoring the content of nitrogen, phosphate, heavy metals, linear alkylbenzene sulphonate (LAS), volatile organic acids and alcohols. The pH was approximately 5.6 and the COD approximately 4800 mg·L-1. The average concentrations of sulphate, sulphide, N-ammoniacal organic nitrogen compounds and heavy metals were below the maximum limit, in accordance with local and national environmental legislation, and the average total suspended solids was 0.08 g·L-1. Among the metals analysed, iron was observed with the highest concentrations (0.037 mg·L-1 and 0.72 mg·L-1). Phosphate was detected in 93% of samples (94.65 mg·L-1 average). LAS was detected in all samples (12.24 mg·L-1 to 1023.7 mg·L-1). Thirty-three different xenobiotic organic compounds were identified in the laundry wastewater with the qualitative screening. The major groups of the compounds were fragrances, preservatives, solvents and some surfactants. Although the characterisation indicated low values for many parameters, this does not eliminate the need for specific treatment before its disposal at the sewage system. 展开更多
关键词 GREYWATER Linear alkylbenzene Sulphonate LEGISLATION Xenobiotic Organic Compound Heavy Metal
下载PDF
Conversion of Benzene in the Catalytic Cracking Process
17
作者 Li Rui Yan Jiasong +3 位作者 Geng Qiuyue Chen Hui Su Youyou Wang Yongchao 《China Petroleum Processing & Petrochemical Technology》 SCIE CAS 2022年第3期77-85,共9页
The catalytic cracking of 1-hexene,1-heptene,1-octene,1-nonene,1-decene,and five olefins mixed with benzene,over USY catalysts was conducted in a small fixed fluidized bed reactor to study the conversion of benzene un... The catalytic cracking of 1-hexene,1-heptene,1-octene,1-nonene,1-decene,and five olefins mixed with benzene,over USY catalysts was conducted in a small fixed fluidized bed reactor to study the conversion of benzene under catalytic cracking conditions.Benzene mainly alkylated with C_(2)-C_(5)light olefins,generating monosubstituted alkylbenzenes,and the concentration of light olefins dramatically affected the alkylbenzene yield.Due to the limitation of thermodynamic equilibrium,the yield of benzene alkylation to alkylbenzene in catalytic cracking was in a relative low level.The equilibrium constant of benzene alkylation decreases with the increasing reaction temperature which resulted in reduction of alkyl benzene yield. 展开更多
关键词 alkylbenzene BENZENE catalytic cracking cracking catalyst OLEFIN
下载PDF
Effects of Self-purification of River Water on Laundry Wastewater
18
作者 Liya TAN Yili CHEN +4 位作者 Liuying CHEN Linghan ZENG Yujie CAI Bingbing FENG Hai WANG 《Agricultural Science & Technology》 CAS 2017年第6期1023-1028,共6页
[Objective] This study was conducted to investigate the effect of laundry wastewater on the quality of river water and the dilution purification effect of river water on laundry wastewater. [Method] The effects of lau... [Objective] This study was conducted to investigate the effect of laundry wastewater on the quality of river water and the dilution purification effect of river water on laundry wastewater. [Method] The effects of laundry wastewater on the contents of total nitrogen(TN), total phosphorus(TP), suspended solids(SS), chemical oxygen demand(COD) and linear alkylbenzene sulfonic acid(LAS) were studied in 7 rivers of Shaoxing City. [Result](1) The contents of TN, TP, SS, COD and LAS increased by 92%, 99%, 340%, 351% and 923%, respectively, at the discharging moment of laundry wastewater; and(2) the five pollutional indexes significantly decreased over time, and especially 2 h after the discharge of laundry wastewater, compared with former the discharge of laundry wastewater, the contents of TN, TP, COD and LAS increased by 6%, 11%, 9% and13%, respectively,while the contents of SS still increased by 76%, i.e., SS required a longer time to achieve self-purification. [Conclusion] Laundry wastewater has some influence on thequality of river water, and the self-purification function of river water could effectively remove pollutants. 展开更多
关键词 Laundry wastewater SELF-PURIFICATION Total nitrogen Total phosphorus Linear alkylbenzene sulphonic acid
下载PDF
Investigating the potential of using acoustic frequency on the degradation of linear alkylbenzen sulfonates from aqueous solution
19
作者 DEHGHANI Mohammad Hadi MAHVI Amir Hossein +1 位作者 NAJAFPOOR Ali Asghar AZAM Kamal 《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》 SCIE EI CAS CSCD 2007年第9期1462-1468,共7页
The effectiveness of using acoustical (sonochemical) reactor for degradation of linear alkylbenzen sulfonate (LAS) from aqueous solution was investigated. LASs are anionic surfactants, found in relatively high amo... The effectiveness of using acoustical (sonochemical) reactor for degradation of linear alkylbenzen sulfonate (LAS) from aqueous solution was investigated. LASs are anionic surfactants, found in relatively high amounts in domestic and industrial wastewaters. In this study, experiments on LAS solution were performed using methylene blue active substances (MBAS) method. The effectiveness of acoustical processor reactor for LAS degradation is evaluated with emphasis on the effect of treatment time and initial LAS concentration. Experiments were performed at initial concentrations of 0.2, 0.5, 0.8 and 1.0 mg/L, acoustic frequency of 130 kHz, applied power of 500 W and temperature of 18℃-20℃. At the conditions involved, LAS degradation was found to increase with increasing sonochemical time. In addition, as the concentration increased, the LAS degradation rate decreased in the acoustical processor reactor. 展开更多
关键词 Acoustical reactor Linear alkylbenzen sulfonate (LAS) Acoustic frequency Treatment time Power
下载PDF
Highly efficient ternary organic solar cells with excellent open-circuit voltage and fill factor via precisely tuning molecular stacking and morphology
20
作者 Dinghong Sun Zhenyu Chen +7 位作者 Jianfeng Zhang Wei Song Jingyu Shi Jintao Zhu Yuanyuan Meng Fei Jin Shuncheng Yang Ziyi Ge 《Science China Chemistry》 SCIE EI CAS CSCD 2024年第3期963-972,共10页
The micro-morphology and molecular stacking play a key role in determining the charge transport process and nonradiative energy loss, thus impacting the performances of organic solar cells(OSCs). To address this issue... The micro-morphology and molecular stacking play a key role in determining the charge transport process and nonradiative energy loss, thus impacting the performances of organic solar cells(OSCs). To address this issue, a non-fullerene acceptor PhC6-IC-F with alkylbenzene side-chain, possessing optimized molecular stacking, complementary absorption spectra and forming a cascade energy level alignment in the PM6:BTP-eC9 blend, is introduced as guest acceptor to improve efficiency of ternary OSCs. The bulky phenyl in the side-chain can regulate crystallinity and optimizing phase separation between receptors in ternary blend films, resulting in the optimal phase separations in the ternary films. As a result, high efficiencies of 18.33% as photovoltaic layer are obtained for PhC6-IC-F-based ternary devices with excellent fill factor(FF) of 78.92%. Impressively, the ternary system produces a significantly improved open circuit voltage(V_(oc)) of 0.857 V compared with the binary device,contributing to the reduced density of trap states and suppressed non-radiative recombination result in lower energy loss. This work demonstrates an effective approach for adjusting the aggregation, molecular packing and fine phase separation morphology to increase V_(oc) and FF, paving the way toward high-efficiency OSCs. 展开更多
关键词 alkylbenzene side-chain morphology regulation ternary blends organic solar cells
原文传递
上一页 1 2 下一页 到第
使用帮助 返回顶部