COMPOSITES PART B-ENGINEERING
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2018
·
IF 4.92
Juguo Dai,Qinfen Tian,Qianqian Sun,Wenkang Wei,Jiandong Zhuang,Meizhen Liu,Zhen Cao,Weizhen Xie,Mizi Fan
Developing effective and “green” approaches to handle aquatic pollution problems is currently one of the most important research subjects of environmental remediation. In this paper, an environmentally friendly, low cost, self-cleaning, highly stable and multifunctional TiO 2 enhanced Sodium alginate composite (SAT) aerogel for oil-water separation is developed via a simple combined ionic cross-linking and freeze drying method. The morphological, structural and surface chemical properties of the as-prepared SAT aerogels is characterized by scanning electric microscopy (SEM), X-ray diffraction (XRD), Flourier transformation infrared spectroscopy (FT-IR) and X-ray photoelectron spectroscopy (XPS). The characterizations demonstrate that the SAT aerogel is of three-dimensional porous microstructure with uniformly dispersed TiO 2 nanoparticles (NPs) on alginate matrix. The hydrophilic alginate matrix combined with this unique morphostructure will ensure the SAT aerogels with underwater oleophobicity and subsequent excellent oil/water separation efficiency (up to 99.7%). Moreover, the firmly attached TiO 2 NPs can also endow the aerogel with better UV-aging resistance, photoinduced self-cleaning and environmental remediation performance. The SAT aerogel exhibits better oil/water separation reusability (at least 60 cycles) compared to SA aerogel and excellent photocatalytic performance for methyl orange (MO) degradation (>85% after 6 times repeated use). The “green” facile fabrication process, excellent oil/water separation, photoinduced self-cleaning and reusable performances make the SAT aerogel promising for practical application in aquatic environments. This work may open up new avenues for designing versatile aerogel for wastewater remediation .
研究领域:
环境科学
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材料科学
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化学工程
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纳米技术
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水处理技术
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
·
IF 5.4
Meng Mei,Zhicheng Luo,Zhijian Ke,Ruiyu Guo,Yiyang Zhang,Hui Zhao,Weilin Li
Biochar, as a cost-effective and sustainable material, requires surface engineering for efficient removal of emerging contaminants like ibuprofen (IBU). This study demonstrates a facile one-step strategy using a FeCl 3 /urea deep eutectic solvent (DES) as an all-in-one modifier to concurrently introduce magnetization and N-doping during pyrolysis. By optimizing the pyrolysis temperature (500–800 °C) and peanut shell biomass/DES ratio (1:3–1:5), we identified that these parameters critically governed the biochar’s properties including graphitization, nitrogen content, defect density, surface functionalities and porosity. This enabled the synthesis of an N-doped magnetic biochar (PB600 1/5 ) that achieved a high IBU adsorption capacity of 175.75 mg/g, which was attributed to its favorable pore structure, abundant oxygen-containing groups, N functionalities and accessible Fe species. The adsorption followed pseudo-second-order kinetic and the Langmuir isotherm models, driven by mechanisms including pore filling, hydrogen bonding, Fe-complexation and π-related interactions. The biochar also exhibited excellent reusability and anti-interference ability. This work elucidates the synergistic interfacial mechanisms governing IBU adsorption and highlights the FeCl 3 /urea DES as an effective strategy for designing multifunctional biochar for pharmaceutical wastewater remediation.
研究领域:
环境科学
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材料科学
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污染控制化学
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可持续技术
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吸附学
✓ 已验证
产品关联
DOI
高影响因子
WATER SCIENCE AND TECHNOLOGY
·
2021
·Vol. 84
·期 1
·216-224
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IF 1.915
Zhu Dandan,Hong Xiaoting,Hui K. S.
This study shows the effectiveness of a novel electrocoagulation process using magnetically attracted iron scrap anodes for phosphate removal from aqueous solution. The effect of contact time, reaction temperature, dose of iron scrap, initial phosphate concentration, applied voltage, pH, magnetic force, and the species of competing anions on the efficiency of phosphate removal and the reaction products has been investigated. The techniques of XRD, XPS, and VSM were used to characterize the elemental composition and the types of the reaction products in order to clarify the interaction between novel anode and phosphate ions. The removal of phosphate was fitted by a pseudo first-order reaction kinetic model. The results showed that magnetically attracted iron scrap anodes were electrodissoluted under an applied potential and reacted with phosphate into Fe-hydroxo-phosphate complexes. The work suggested that electrocoagulation using magnetically attracted iron scrap anodes had the potential to become a promising technique for phosphate precipitation. Electrocoagulation by magnetically attracted iron scrap was used for phosphate removal. The effect of different parameters on novel electrocoagulation was investigated. Elemental composition and the type of the reaction product were characterized by XRD, XPS, and VSM. Fe-hydroxo-phosphate complexes were formed during iron scrap electrocoagulation. Iron scrap waste was used for a high-value electrode.
研究领域:
环境工程
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水处理
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废水修复
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电化学过程
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污染物去除
✓ 已验证
DOI
高影响因子
JOURNAL OF ENVIRONMENTAL ENGINEERING
·
2020
·Vol. 146
·期 12
·04020134
·
IF 1.264
Mahdi Hassan,Guangcan Zhu,Zhonglian Yang,Yongze Lu
A three-dimensional bioelectrochemical reactor (3D-BER) system combining heterotrophic and autotrophic denitrification processes was developed, which possesses the effects of pH on nitrate or nitrite removal and simultaneously elimination of antibiotic sulfamethoxazole (SMX) from simulated municipal wastewater. The experimental results demonstrated that the variation of microbial communities was examined with electric current from 0 to 90 mA at pH 6.50±0.12 to 7.9±0.04. When the current increased from 0 to 90 mA, the nitrate removal efficiency increased from 59.05% to 99.21%, and SMX removal efficiency of 43.9%–93.9% was achieved. The optimum pH of this reactor was 7.0±0.20 to 7.50±0.31, and a lower or higher pH condition may effect autotrophic and heterotrophic denitrification processes. Simultaneously, the denitrification mechanism in this system was analyzed through pH variation in the effluent. The CO2 produced from the anode acted as a good pH buffer, automatically controlling pH in the reaction zone. A low current intensity does not effect the degradation by-products but increases the SMX removal efficacy. Bacterial community analysis revealed substantial changes in microbial communities at the phylum, class, and genus levels after SMX acclimatization. Thauera, a well-known aromatic-degrading bacteria, was the most dominant genus present in acclimatized conditions at 60 mA. In summary, this study shows that high currents changed the microbial structure, and the acclimatized sludge can play a vital role in the biodegradation of SMX, and removal of NO3−─ N from simulated municipal wastewater by a novel 3D-BER.
研究领域:
环境工程
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水处理
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生物电化学系统
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废水修复
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微生物生态学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）