JOURNAL OF MEMBRANE SCIENCE
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2019
·
IF 7.015
Si Zhang,Quang Viet Ly,Long D. Nghiem,Jing Wang,Jianxin Li,Yunxia Hu
Membrane fouling can hinder the widespread application of thin film composite (TFC) reverse osmosis (RO) for water treatment. This study evaluated a novel zwitterion-grafted TFC RO as a mean to address organic fouling for water reclamation. The membrane exhibited the best permeability at the grafting condition of 45 °C in 1 h. This modified membrane consistently possessed improved antifouling ability irrespective of organic foulants. Among individual foulants, surfactant Dodecyl Trimethyl Ammonium Chloride (DTAC) posed the worst fouling potential due to its low molecular weight and positive charge, whereas fouling induced by other substances were relatively analogous and minor. In the mixture of DTAC and proteins, the former played a key role in governing the membrane fouling. While, their interplay affected membrane fouling, the fouling extent varied upon the membrane materials. The extended Derijaguin, Landau, Verwey and Overbeek (xDLVO) theory was unable to fully describe the interactions between surfactant foulants and the membrane materials. The complementary use of quartz crystal microbalance with dissipation (QCM-D), otherwise, concurred the fouling potential and gave the plausible interpretation for fouling mechanisms by providing insightful information of foulant layer on the polyamide-coated sensor. This study provided critical insights of organic foulants’ behavior on TFC RO membrane and offered the promising industrial implication of the novel membrane.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
DESALINATION
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2023
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IF 9.9
Fei Song,Chunlai Tu,Fangang Meng,Liang Wang,Lichao Xia,Shanshan Zhao
Design of zwitterionic polymers with feasible methods is rational for grafting membrane surface and enhancing its antifouling property. Herein, we propose a facile and scalable “one-pot” polymerization approach to synthesize a novel thiolated zwitterionic polyurethane (TZP) and graft it onto a polydopamine activated membrane surface via Michael addition for engineering antifouling nanofiltration (NF) membranes. The chemical structure of TZP was confirmed by the 1 H nuclear magnetic resonance and it had a weight average molecular weight of 13,000 g mol −1 . The Fourier transform infrared and X-ray photoelectron spectra confirm the successful introduction of sulfobetaine groups on membrane surfaces. The TZP grafting neutralized the negative charge of PDA interlayer and further improved membrane hydrophilicity . The pore size and ion selectivity of the NF membranes were optimized by tuning TZP concentrations. Satisfactory divalent anion retention along with a molecular weight cut-off of ∼800 Da was achieved at 30 g L −1 TZP concentration (i.e., TZP-30). During two cycles of synthetic wastewater filtration, the TZP-30 membrane exhibited excellent fouling resistance and satisfactory flux recovery rate compared with a benchmark commercial NF membrane. Our findings shed light on the future design of novel zwitterionic polymers and antifouling NF membranes for sustainable water reclamation .
研究领域:
材料科学
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环境工程
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
Membranes
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2021
·Vol. 11
·期 11
·845
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IF 4.106
Ziyan Wang,Keqiang Liu,Ya Gao,Guanhua Li,Zhenyu Li,Quanfu Wang,Liwei Guo,Tong Liu,Mohammed A. Al-Namazi,Sheng Li
Insufficient removal of microplastics (MPs) and nanoplastics (NPs) may exert negative effects on the environment and human health during wastewater reclamation. The fertilizer-driven forward osmosis (FDFO) is an emerging potential technology to generate high-quality water for irrigation of hydroponic systems. In this study, the removal of MPs/NPs by the FDFO process together with their impact on FDFO membrane fouling was investigated, due to FDFO’s low molecular weight cut-off and energy requirement by using fertilizer as draw solution. Plastic particles with two different sizes (100 nm and 1 μm) and extracellular polymers released by real wastewater bacteria were utilized as model compounds for FDFO performance comparison. Results show that FDFO membrane system could generate high-quality irrigation water with only fertilizer, completely removing extracellular polymers, MPs and NPs from wastewater. It was found that the MPs and NPs themselves do not cause a significant membrane fouling. Moreover, it could help to reduce the membrane fouling caused by extracellular substances. That is probably because MPs and NPs helped to form a loose and porous fouling layer. Therefore, the FDFO process could be a long-term stable (low fouling) process for the reclamation of wastewater with high-quality requirements.Keywords:microplastics;nano-scale plastics;forward osmosis;membrane fouling
研究领域:
环境工程
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水处理
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膜技术
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DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2022
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IF 16.744
Xin Mao,Jing Shen,Yu Shen,Wenxin Shi,Bing Zhang
This study proposed and applied an innovative heat/powdered activated carbon (PAC)/persulfate (PS) pre-treatment system for the first time in an aerobic granular sludge–membrane system (AGSMS). We examined the effects of the heat/PAC/PS system on membrane fouling mitigation and contaminant removal and qualitatively evaluated the contribution of adsorption and oxidation to membrane fouling control. Compared to other pre-treatment systems, the heat/PAC/PS system could enhance the removal of pollutants, reduce fouling resistance, and delay the decline of permeation flux, resulting in low foulant content on the membrane surface and formation of a loose and porous cake layer. According to radical scavenging experiments, the excellent heat/PAC/PS system pre-treatment performance was attributed to the PAC adsorption capacity and non-radical oxidation pathway. Thermal synergy played a significant role in promoting adsorption and oxidation abilities. The extended Derjaguin–Landau–Verwey–Overbeek theory indicated that the high-energy barrier in the heat/PAC/PS system was an important factor in inhibiting the adhesion of foulants to the membrane surface. Furthermore, the correlation analysis suggested that membrane fouling control should focus on the removal of chemical oxygen demand and suspended solids. This study provides a new approach for membrane fouling mitigation through AGSMS in municipal wastewater treatment.
研究领域:
环境科学
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水处理工程
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产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2025
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IF 9
Hao Guo,Mengxin Li,Chunhua Dong,Jiakun Li,Ming Wang,Xinliang Liu,Yingfei Hou
Nanofiltration (NF) membranes are in great demand for wastewater reclamation and resource recovery owing to their simple operation, moderate conditions, and cost-effectiveness. However, membrane fouling remains a bottleneck in the process of utilizing NF membranes, especially for industrial effluent treatment. Inspired by the hierarchical wettability of shark skin with hydrophilic “shield scale intermediate layer” and low-surface-energy “mucus outer layer”, a highly effective dual-defensive antifouling NF membrane with special hydrophilic and oleophobic wettability is engineered by a simple hydrothermal cross-linking method. The special hierarchical surface wettability imparts the membrane with superior fouling-resistance and fouling-release properties. The hydrophilic wettability endows the membrane with fouling-resistance property, enabling it to achieve the water flux recovery ratio (FRR) above 90% for bovine serum albumin, sodium dodecyl sulfate, and hexadecyl trimethyl ammonium bromide model foulants. The oleophobic wettability facilitates the membrane with fouling-release property, showing the FRR up to 94% for pump oil-in-water emulsion. More importantly, combined with the special hydrophilic and oleophobic wettability, the dual-defensive NF membrane with fouling-resistance and fouling-release properties achieved a FRR of 83% for practical oil-containing secondary effluent from the petrochemical industry, representing 1.2 times the value of the control single-defensive hydrophilic NF membrane. The Extended Derjaguin-Landau-Verwey-Overbeek (XDLVO) theory further reveals a higher interfacial energy between foulants and membranes compared to the control group, indicating reduced foulants’ adsorption and improved foulants’ release. This work provides a simple and efficient construction of a bionic interface to improve the antifouling performance of the NF membrane.
研究领域:
环境科学
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材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
Environmental Science & Technology Letters
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2016
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IF 4.839
Hao Guo,Yu Deng,Zhijia Tao,Zhikan Yao,Jianqiang Wang,Chuner Lin,Tong Zhang,Baoku Zhu,Chuyang Y. Tang
Endocrine-disrupting compounds (EDCs), an important class of micropollutants with potent adverse health effects, are generally poorly rejected by traditional thin film composite polyamide membranes and thus pose significant risks in membrane-based water reclamation. We hypothesize that membrane rejection of hydrophobic EDCs can be enhanced by a hydrophilic surface coating. Using polydoamine (PDA) as a model hydrophilic coating layer, the PDA-coated NF90 membrane experienced an up to 75% reduction in the passage of bisphenol A compared to the control (NF90 without coating). Meanwhile, we also observed a systematic increase in the level of rejection of three hydrophobic parabens with an increase in PDA coating time. In contrast, there were no systematic changes in the rejection of neutral hydrophilic polyethylene glycol, which suggests that the enhanced rejection of EDCs was due to weakened EDC–membrane hydrophobic interaction. Further sorption tests revealed that the hydrophilic PDA coating could effectively decrease the rate of sorption of EDCs by the membrane, which is responsible for the improved rejection as predicted by the solution–diffusion theory. This study reveals an exciting opportunity for engineering membrane surface properties to enhance the rejection of targeted micropollutants, which has important implications in membrane-based water reclamation.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
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2020
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IF 6.551
Haifeng Zhang,Yingting Jia,Zhuoheng Tang,Lei Wang,Wenxin Hu,Junmin Gao,Jianying Hu,Min Yang
Wastewater reclamation and reuse is considered an attractive and practical method for coping with water scarcity . However, the presence of micropollutants in reclaimed water, including endocrine disrupting chemicals (EDCs), is a major public health concern. This study attempted to identify unknown EDCs with liver X receptor (LXRα) agonist/antagonist activities in reclaimed wastewater, using nuclear receptors binding extraction coupled with high-resolution mass spectrometry (NRBE-HRMS). In total, 105 compounds in the reclaimed wastewater exhibited LXRα-binding activity. Among them, two previously unknown LXRα-antagonist compounds, catechol and 4-acetamidoantipyrine, were identified, based on authentic standards. The two LXRα-antagonist compounds exhibited weak LXRα-antagonist activities in a yeast two-hybrid assay. Catechol and 4-acetamidoantipyrine inhibited the β-galactosidase activity induced by 60 nM of TO901317 in an LXRα yeast assay, with IC 20 values of 79,938.9 nM and 6286.4 nM, respectively. To the best of our knowledge, this is the first study to identify EDCs in reclaimed wastewater with LXRα-agonist/antagonist activity using the NRBE-HRMS method.
研究领域:
环境科学
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毒理学
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分析化学
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产品关联
DOI
PubMed
高影响因子
Catalysts
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2019
·Vol. 9
·期 4
·389
·
IF 3.444
Xiyan Xu,Shuming Liu,Yong Cui,Xiaoting Wang,Kate Smith,Yujue Wang
Increasing demand for fresh water in extreme drought regions necessitates potable water reuse. However, current membrane-based water reclamation approaches cannot effectively remove carcinogenic 1,4-dioxane. The current study reports on the solar-driven removal of 1,4-dioxane (50 mg L−1) using a homemade WO3/nγ-Al2O3nano-catalyst. Characterization methods including scanning electron microscope (SEM), X-ray photoelectron spectroscopy (XPS) and X-ray fluorescence (XRF) analyses are used to investigate the surface features of the catalyst. The 1,4-dioxane mineralization performance of this catalyst under various reaction conditions is studied. The effect of the catalyst dosage is tested. The mean oxidation state carbon (MOSC) values of the 1,4-dioxane solution are followed during the reaction. The short chain organic acids after treatment are measured. The results showed that over 75% total organic carbon (TOC) removal was achieved in the presence of 300 mg L−1of the catalyst with a simulated solar irradiation intensity of 40 mW cm−2. Increasing the dose of the catalyst from 100 to 700 mg L−1can improve the treatment efficiency to some extent. The TOC reduction curve fits well with an apparent zero-order kinetic model and the corresponding constant rates are within 0.0927 and 0.1059 mg L−1s−1, respectively. The MOSC values of the 1,4-dioxane solution increase from 1.3 to 3 along the reaction, which is associated with the formation of some short chain acids. The catalyst can be effectively reused 7 times. This work provides an oxidant-free and energy saving approach to achieve efficient removal of 1,4-dioxane and thus shows promising potential for potable reuse applications.Keywords:1,4-dioxane;photocatalysis;WO3/nγ-Al2O3;solar radiation;water treatment;potable reuse
研究领域:
环境科学
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化学工程
✓ 已验证
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
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2025
·
IF 19
Shaohui Guo,Jing Cui,Zhuxia Zhang,Jing Wen,Xuchuan Cao,Xiaochuan Duan,Xian-Ming Zhang
Solar-driven hydrogen production from water using particulate photocatalysts is considered an economical and highly effective strategy for producing hydrogen fuel. However, the reliance of this process on pure water resources and the limited utilization of wastewater hinders the extensive development of this catalytic technique. In this study, an efficient water phase regulation strategy is proposed to enable highly efficient water splitting for hydrogen production and wastewater reutilization. Changing the phase state of wastewater can lower the transport resistance of the hydrogen gas by approximately two orders of magnitude and suppress the damage from ions to the photo absorption and surface-active sites. Additionally, the phase-induced local high-temperature environment reduces the interface adsorption barrier, accelerating the separation and transfer process of photo-induced carriers. Notably, a remarkable hydrogen production rate of up to 51.33 mmol m −2 h −1 is achieved under outdoor natural sunlight illumination in the particulate photocatalytic system, demonstrating that the phase interface regulation strategy offers significant advantages for practical applications in hydrogen production and wastewater reutilization.
研究领域:
物理化学
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环境科学
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能源材料
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催化化学
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太阳能利用
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
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2022
·
IF 7.968
Xin Lei,Yu Lei,Shuangshuang Cheng,Xin Yang
N -nitrosamines are great concern in potable water reuse. This study investigated the reaction kinetics of chlorine radicals (Cl • and Cl 2 •− ) with N -nitrosamines. The second-order reaction rate constants of Cl • ( k Cl • ) and Cl 2 •− ( k Cl2 •− ) with eight N -nitrosamines at pH 7.0 varied in the range of (5.02 ± 0.41)–(57.1 ± 4.25) × 10 8 M −1 s −1 and (0.46 ± 0.04)–(10.6 ± 0.73) × 10 8 M −1 s −1 , respectively. The numbers of methylene groups (#−CH 2 −) showed a good positive correlation with k Cl • (R 2 = 0.71), but not with k Cl2 •− . The degradation of eight N -nitrosamines under UV/chlorine advanced oxidation process (AOP) slightly increased by 1–18% in contrast to UV irradiation alone, and Cl − in the AOPs cannot inhibit their removal. The results improved the understanding of the fate of N -nitrosamines in chlorine radical-involved AOPs.
研究领域:
环境化学
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水处理
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高级氧化过程
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2020
·
IF 7.864
Ruobin Dai,Xueye Wang,Chuyang Y. Tang,Zhiwei Wang
Removal of pharmaceutically active compounds (PhACs) is of great importance in wastewater reclamation due to their potent negative impacts on human health. Typical polyamide nanofiltration (NF) membranes are negatively charged, which compromises their rejection rate of positively charged PhACs. Herein, we propose to rationally design a novel thin-film nanocomposite (TFN) NF membrane featuring a dually charged metal organic framework (MOF) to effectively remove both positively and negatively charged PhACs. Ethylenediamine (ED) was grafted to the coordinately unsaturated metal sites inside the MIL-101(Cr). The resulting ED-MIL-101(Cr) contained both strong positively charged amine groups inside its channels and negatively charged carboxyl groups at its surface. This dually charged nature of the MOF nanoparticles enabled the ED-MIL-101(Cr)-containing TFN membrane to achieve high rejection rates (mostly >90%) for both positively (terbutaline, atenolol, fluoxetine) and negatively charged PhACs (ketoprofen, diclofenac, bezafibrate). At the same time, the ED-MIL-101(Cr) TFN membrane had greatly improved water permeance (140% over the control membrane with MOF loading). Calculations based on density functional theory further confirmed the large energy barrier for the migration of both negatively and positively charged PhACs across the nanochannels of ED-MIL-101(Cr). This study highlights a promising potential of dually charged MOF-TFN membranes for efficient removal of trace organic contaminants in wastewater reclamation.
研究领域:
环境科学
·
材料科学
·
水处理工程
✓ 已验证
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Zhaohui Fei,Chi Jiang,Qunwei Tang,Yingfei Hou
To solve the scarcity of fresh water, reverse osmosis (RO) technology for seawater desalination and wastewater reuse has been developed rapidly. However, the performance of RO is limited by poor selectivity towards certain harmful small molecule constituents (e.g., boron in seawater and N-nitrosodimethylamine in wastewater) and the permeability-selectivity trade-off. Herein, a metal polyphenol network interlayer including both hydrophobic zone and monomer adsorption zone is proposed to optimize interfacial polymerization (IP) process for fabrication of RO membrane . This heterogeneous characteristic is endowed by well-chosen phenol (i.e. TTSBI) and metal (Ni). The physicochemical properties of the substrate are also optimized. An ultra-selective RO membrane with thinner separation layer, higher crosslinking degree and larger surface area is obtained. The RO membranes exhibit separation performance beyond the upper selectivity limit for NaCl and hazardous small molecules. The membrane water permeance is 3.50 L m −2 h −1 bar −1 while the NaCl rejection is 99.5 %. Meanwhile, the mechanism of the interlayer influencing IP process is investigated by combining molecular simulation and experimental methods. Our work provides a novel design direction of substrate used for fabricating RO membrane with outstanding performance.
研究领域:
环境科学
·
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）