JOURNAL OF ALLOYS AND COMPOUNDS
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2020
·
IF 4.65
Kai Wu,Yi Zhang,Fang Ge,Xin Huang,Hong-Hua Ge,Yu-Zeng Zhao,Xin-Jing Meng,Bin-Lin Dou
A stable TiO 2 nanofluid with absolute value of Zeta potential greater than 44 mV was prepared by using sodium dodecylbenzene sulfonate (SDBS) as a dispersing agent in this paper. Electrochemical methods and surface analysis were used to study the corrosion behavior of brass in simulated cooling water (SCW), simulated cooling water containing SDSB (SCW-SDBS), and TiO 2 nanofluid (SCW-SDBS-TiO 2 nanofluid). The results show that the total resistance R sum of the brass electrode was smallest and increased slowly with time, and the corrosion current density was largest in SCW. The corrosion products on the brass surface were composed of the inner layer of Cu 2 O and the outer layer of Zn 5 (CO 3 ) 2 (OH) 6 . In SCW-SDBS medium, the R sum value of brass increased rapidly in the first 4 days and was significantly higher than that in SCW. A protective adsorption SDBS film was formed on the brass surface and minimized the corrosion rate of brass in SCW-SDBS medium. In SCW-SDBS-TiO 2 nanofluid, the R sum value of brass was higher than that in SCW, but significantly lower than that in SCW-SDBS medium. There was almost no SDBS adsorption film formed on the brass surface in SCW-SDBS-TiO 2 nanofluid, which significantly reduced the corrosion inhibition performance of SDBS on brass. The competitive adsorption of negatively charged TiO 2 nanoparticles and SDBS anions in the nanofluid on the brass surface might be the reason why the protective SDBS adsorption film was not easy to form on the brass surface in SCW-SDBS-TiO 2 nanofluid.
研究领域:
材料科学
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电化学
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表面科学
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DOI
高影响因子
JOURNAL OF HYDROLOGY
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2022
·
IF 6.708
Xueyan Lyu,Zhengyu Li,Dengjun Wang,Qi Zhang,Bin Gao,Yuanyuan Sun,Jichun Wu
Per– and polyfluoroalkyl substances (PFAS) contamination is ubiquitous and likely co–exist with hydrocarbon surfactants in the subsurface environment. The transport of PFAS in unsaturated porous media (quartz sand–packed columns) with an anionic hydrocarbon surfactant was investigated using perfluorooctanoic acid (PFOA) and sodium dodecyl benzene sulfonate (SDBS) as representative PFAS and hydrocarbon surfactant at 1.5 and 30 mM NaCl, respectively. Our results show that SDBS inhibited the retardation of PFOA during transport. The degree of the inhibited retardation was more significant at higher concentration of SDBS ( C SDBS ) for a given concentration of PFOA ( C PFOA ) and higher ionic strength. In contrast, PFOA only marginally affected the transport of SDBS under all tested conditions. This is mainly due to the greater surface activity of SDBS with respect to PFOA, favoring the competitive preferential adsorption of SDBS at the air–water interface and then the transport of PFOA in the unsaturated sand. This assumption is further supported by the greater air–water adsorption coefficient ( K ai ) and surface excess ( Γ ) for SDBS than those for PFOA, as well as the surface tension isotherms that fairly weighted toward to SDBS in the binary PFOA–SDBS system. Our findings indicate the critical role of anionic hydrocarbon surfactant in retarding PFOA transport in unsaturated zone. This should be considered when assessing the transport potential and environmental risk, and developing remedial strategies of PFAS in the subsurface environment.
研究领域:
环境科学
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化学
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产品关联
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2024
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IF 4.3
Zhong Wang,Wanting Li,Xiaomin Hou
As the most universally used anionic surfactant, ubiquitous existence and accumulation of sodium dodecyl benzene sulfonate (SDBS) in the environment has inevitably imposed the associated harmful impacts to plants due to producing excessive reactive oxygen species. However, the underlying hazardous mechanism of the SDBS-induced oxidative stress to plants at molecular level has never been reported. Here, the molecular interaction of AtPrxQ with SDBS was explored for the first time. The intrinsic fluorescence of AtPrxQ was quenched based on static quenching, and a single binding site of AtPrxQ towards SDBS and the potential interaction forces driven by hydrophobic interactions were predicted from thermodynamic parameters and molecular docking results. Besides, the interaction pattern of AtPrxQ and SDBS was also confirmed by the bio-layer interferometry with moderate binding affinity. Moreover, the structural changes of AtPrxQ along with the destructions of the protein framework and the hydrophobic enhancement around aromatic amino acids were observed upon binding with SDBS. At last, the toxic effects produced by SDBS on peroxidase activities and Arabidopsis seedlings growth were also characterized. Thus this work may provide insights on the molecular interactions of AtPrxQ with SDBS and assessments on the biological hazards of SDBS to plants even for the agriculture.
研究领域:
植物学
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环境毒理学
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分子生物学
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DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
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2022
·
IF 7.968
Yan Xu,Yuecheng Zhang,Wei Liu,Hao Yin,Chunyan Yang,Jianxin Chen
With the rapid increasing drainage of industrial sewage, the problems arising from sewage containing high-concentration surfactant become more urgent. In order to purify the high-concentration surfactant solution, a novel integrated technology of foam separation and TiO 2 photocatalysis was developed. An anionic surfactant of sodium dodecyl benzene sulfonate (SDBS) was used as the model surfactant and its initial concentration in the simulated solution was 0.5 g/L. First, foam separation had been performed to primitively reduce SDBS concentration in the simulated solution. Based on the results of independent factor test, a five-level-three-factor central composite design (CCD) based on response surface design (RSM) was used to predict the optimal experimental conditions. Under above conditions, the enriching proportion and removing percentage of SDBS were 4.69 ± 0.14 and 84.85 ± 0.71 %, respectively. The surface tension and foam stability of the residual solution after foam separation had been measured using pulling ring method and bubbling method, respectively. The residual solution after foam separation possessed a higher surface tension and weaker foam stability compared with those of freshly prepared SDBS solution. Extrinsic fluorescence spectra using pyrene showed that interfacial adsorption had led to the generation of hydrophilic SDBS micelles . In order to perform TiO 2 photocatalysis, the adsorption capacity of SDBS on TiO 2 nanoparticles had been studied. The adsorption of SDBS on TiO 2 nanoparticles obeyed Pseudo-second-order dynamics model and Freundlich isotherm model. Based on the unique optical property and particle entrainment capacity of foam, a coupling operation of foam separation and TiO 2 photocatalysis was proposed to degrade SDBS in the residual solution. The suitable operating conditions were identified and the maximum degradation percentage of SDBS reached 94.86 ± 1.06 %. The total SDBS removing percentage of developed technology was 99.38 ± 0.10 %. Total organic carbon (TOC) concentrations of SDBS solution before and after treatment were measured using combustion oxidation coupled nondispersive infrared absorption method. Finally, the economic analysis was carried out to assess the cost effectiveness of the integrated technology of foam separation and TiO 2 photocatalysis.
研究领域:
环境科学
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化学工程
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产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2020
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IF 9.038
Zheng-Zhe Zhang,Yu Zhang,Ya-Fei Cheng,Ren-Cun Jin
The increase of emerging contaminants, such as surfactants, is one of the major challenges to biological wastewater treatment. However, the potential impact of linear alkylbenzene sulphonates (LAS), a major class of anionic surfactants, on anammox process is unclear. The long-term effects of sodium dodecyl benzene sulfonate (SDBS, as a model LAS) on reactor performance, microbial community and sludge properties were investigated in this study. The presence of 5 mg L −1 SDBS promoted the release of extracellular microbial products from anammox granules and the wash-out of anammox population via effluent. Despite sludge disaggregation, the reactor performance was robust to the exposure of 5 mg L −1 SDBS due to functional redundancy. With the further increase of SDBS to 10 mg L −1 , the metabolic activity of anammox biomass and the transcription and post-translation of hydrazine dehydrogenase were significantly decreased. The potential mechanism might be associated with the damage on cell membrane that induced the leakage of intracellular matrix. These results highlight the need to consider the potential risk of LAS to operation of anammox process in biological wastewater treatment plant.
研究领域:
环境工程
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微生物学
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水处理
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DOI
PubMed
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
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2018
·Vol. 135
·期 40
·46717
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IF 1.901
Chang Hu,Zhiping Du,Xiumei Tai,Xiaoying Liu
The interactions between the mixed surfactants sodium dodecyl benzenesulfonate (SDBS) and modified oil ethoxylate (SOE-60) with polyvinylpyrrolidone (PVP) were studied at 25 ± 1 °C using a surface tension meter, Ubbelohde viscometer, and fluorescence spectrophotometer. Interaction mechanisms of SDBS/SOE-60-PVP systems were explained by the “necklace and bead” model. The results showed that the interaction could be divided into three parts by two characteristic concentrations: the critical aggregation concentration (cac) and the polymer saturation point (psp). The interaction mechanisms of SDBS/SOE-60-PVP systems are consistent with the “necklace and bead” model. The binding mixing surfactant micelles, formed by free SDBS and SOE-60 molecules, were bound to PVP chains by hydrophobic and ion–dipole interactions. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018 , 135 , 46717.
研究领域:
高分子化学
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物理化学
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产品关联
DOI
高影响因子
LANGMUIR
·
2019
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IF 3.683
Shuai Liu,Yue Hu,Jing Xia,Shenwen Fang,Ming Duan
Dual-trap optical tweezers have been used to directly measure the interaction forces between two silica particles upon controlling the concentration of the ionic surfactant sodium dodecylbenzenesulfonate (SDBS). By capturing two silica particles in one spot optical trap and one linear optical trap and controlling the linear trap to bring one particle to approach another sufficiently closer, the interaction forces between these two particles can be measured as the separation distance changes. Results showed that with increasing concentrations of SDBS, the interaction force between the two silica particles emerges at closer surface distance between two silica particles. Only repulsive force exists between silica particles below the critical micelle concentration (cmc) of SDBS and it could be well-fitted using the classical Derjaguin–Landau–Verwey–Overbeek (DLVO) theory. However, the depletion attraction force appears above the cmc of SDBS which is induced by the generation of SDBS micelles. By in situ measurement of the interaction force between two silica particles in the presence of different concentrations of SDBS, the depletion force can be quantitatively calculated.
研究领域:
胶体科学
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界面化学
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产品关联
DOI
PubMed
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
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2022
·Vol. 30
·期 8
·20006-20019
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IF 5.19
Lin Qinghua,Hong Mei
Fractional wettability is common in the dense non-aqueous phase liquids (DNAPL) contaminated sites. However, it is still unclear how fractional wettability affects surfactant-enhanced DNAPL immiscible mobilization in saturated porous media. The macro-contact angle of the fractional wettability media was measured. The results of column experiments showed that the entrapped tetrachloroethene (PCE) saturations after sodium dodecyl benzene sulfonate (SDBS) flooding were lower in the media where NAPL-wet sand was present compared with those in water-wet media. In the media which contained 25% octadecyltrichlorosilane (OTS)-treated sand, the entrapped PCE saturations decreased to the minimum, and the decrease was much larger in fine sand media. The SDBS-enhanced PCE recoveries were jointly affected by fractional wettability, particle size, and interfacial tension (IFT). When NAPL-wet sand was present and SDBS concentration was just 0.125 g⋅L −1 , the SDBS-enhanced PCE recoveries increased significantly. As the SDBS concentration continues to increase to 0.5 g⋅L −1 , they only increased slightly. In the fine sand media, the SDBS-enhanced PCE recoveries were higher, and they increased more obviously with the increase of NAPL-wet sand fractions. The influence weight of fractional wettability on SDBS-enhanced PCE recoveries was the largest (47.09%) under the experimental conditions. These findings indicate that it is important to consider fractional wettability characteristics when establishing a DNAPL immiscible mobilization strategy, because it is not sufficient to consider only IFT reduction, especially in media with finer pore structures.
研究领域:
环境科学
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化学工程
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水文地质学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2024
·
IF 8.4
Qing Fang,Qin Liu,Zongli Xie,Matthew R. Hill,Kaisong Zhang
Solvent-resistant nanofiltration membranes , capable of breaking “trade-off” between permeability and selectivity while resisting physical aging, hold crucial utility in developing advanced membrane materials and reducing energy consumption associated with solvent recovery. Herein, the development of scalable, mixed matrix membranes (MMMs) was presented based on polysulfone (PSf) substrate with ultra-high permeability and aging resistance. The upper selective layer was composed of poly-trimethylsilylpropyne (PTMSP) and two types of nano-fillers, namely poly-dichloroxylene ( p -DCX) and sodium dodecylbenzene sulfonate-molybdenum sulfide (SDBS-MoS 2 ). Under the influence of the additives, the redistribution of the free volume of the polymer as well as the internal spaces within additives creates additional pathways for solvent diffusion, thus increasing solvent permeance. Additionally, the combined effect of the two additives is likely to inhibit filler agglomeration and improve the overall effectiveness of the additives. Compared to pure PTMSP membranes, the p -DCX/SDBS-MoS 2 PTMSP MMMs exhibited enhanced methanol permeance (10.58 vs. 3.14 L m −2 h −1 bar −1 ) and RB rejection (99.23 vs. 96.13 %), which greatly exceeded that of current OSN MMMs. As anticipated, aging of the prepared membranes decelerated with the addition of the additives, and the methanol permeation loss rate decreased from 50.32 % to 13.23 % after 300 h. Molecular dynamics simulations explored by structural analysis revealed the mechanism for the significant improvement in methanol permeance and aging resistance. The membranes obtained were found to be highly industrially applicable, thereby offering the potential to reduce operation costs in energy-intensive separation processes.
研究领域:
材料科学
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环境工程
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产品关联
DOI
高影响因子
BIORESOURCE TECHNOLOGY
·
2024
·
IF 9.7
Xin Lv,Songhe Zhang,Shaozhuang Guo,Xiuren Hu,Hezhou Chen,Zheng Qiu,Yuexiang Gao,Aiyu Qu
The fate and effects of sodium dodecyl benzene sulfonate (SDBS) in sewage treatment plants effluents on nutrients and submerged macrophytes are far from clear in wetlands. This study conducted a 24-day experiment to investigate changes in nutrients and epiphytic biofilm of Hydrilla verticillata in wetlands receiving effluents with 0.5, 2 and 5 mg L −1 SDBS. The decrease of SDBS in overlying water followed pseudo-first-order kinetic equation, with over 80 % of SDBS removal achieved. 2 and 5 mg L −1 SDBS decreased nutrient removal efficiency, induced oxidative stress response and damaged cells of H. verticillata . SDBS altered bacterial and eukaryotic community diversity. 0.5 mg L −1 SDBS can promote carbon fixation and methane oxidation of microorganisms. Network analysis revealed that 0.5 mg L −1 SDBS decreased the stability of epiphytic ecosystems. Mantel tests indicated significant influences of SDBS, temperature, and total nitrogen on epiphytic microbial communities.
研究领域:
环境科学
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生态学
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微生物学
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产品关联
DOI
PubMed
高影响因子
TENSIDE SURFACTANTS DETERGENTS
·
2022
·Vol. 59
·期 3
·221-230
·
IF 1.058
Fengli Gong,Hong Xu,Jinxiang Dong
Sodium oxalate (Na 2 C 2 O 4 ) is an excellent phosphorus-free agent, but in sodium oxalate-containing detergents with sodium dodecylbenzene sulfonate (SDBS) and sodium carboxymethyl cellulose (CMC), significant ash deposition occurs on cotton fabrics. SDBS is the main anionic surfactant in modern detergents and cotton fiber is the most commonly used textile fiber. In this study, sodium lignosulfonate (LS) was investigated for its ability to prevent redeposition in SDBS-Na 2 C 2 O 4 -CMC-LS formulations. The effects of LS on ash content, whiteness, optimum washing temperature, calcium oxalate morphology, zeta potential and surface tension were carefully analyzed. The results showed that the addition of LS significantly improved the prevention of ash deposits on cotton fibers. The ash content was less than 0.46% and a small amount of particles were scattered on the cotton fibers. LS showed good dispersibility but had little effect on the washing power and zeta-potential.
研究领域:
材料科学
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纺织工程
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表面化学
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DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2024
·
IF 4.1
Xiaomin Ma,Pengcheng Wen,Yuping Fan,Xianshu Dong,Maoqing Yang,Yuanpeng Fu
The objective of this study was to elucidate the synergistic dewatering mechanism of mixed sodium dodecylbenzene sulfonate (SDBS) and polyethyleneimine (PEI) on kaolinite filter cakes and to test the dewatering effectiveness of a custom-built pressure dewatering device. The dewatering experiments showed that while the reagent dose was reduced by 50%, the dewatering rate decreased to 19.78%, surpassing the optimal dose of a single reagent. During the natural compression stage of the filter cake, the deformation reached its maximum under the same pressure difference. During the transitional period, the closure of the filter cake pores occurred at a slower rate, facilitating better moisture drainage. Under strong compression, the ultimate deformation reached its maximum. PEI acted as a bridging agent for kaolin flocculation and served as a medium for SDBS on the kaolin surface. A small amount of PEI reduced the electrostatic repulsion of SDBS, increasing its adsorption capacity. PEI adsorbed on the kaolin surface through electrostatic and hydrogen bonding, while SDBS could adsorb onto the PEI reagent layer through electrostatic and polar interactions, exposing its alkyl chains on the surface and thereby facilitating flocculation and generating a hydrophobic reagent layer. This study could provide a new method and insights for the efficient pressurized dewatering of kaolin.
研究领域:
环境科学
·
矿物加工工程
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DOI
高影响因子
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