Frontiers of Environmental Science & Engineering
·
2022
·Vol. 17
·期 5
·1-12
·
IF 6.048
Zhang Haiguang,Du Lei,Xing Jiajian,Wei Gaoliang,Quan Xie
Nanofiltration (NF) has attracted increasing attention for wastewater treatment and potable water purification. However, the high-efficiency removal of micropollutants by NF membranes is a critical challenge. Owing to the adsorption and subsequent diffusion, some weakly charged or uncharged micropollutants, such as bisphenol A (BPA), can pass through NF membranes, resulting in low removal rates. Herein, an effective strategy is proposed to enhance the BPA removal efficiency of a crosslinked polyaniline/carbon nanotube NF membrane by coupling the membrane with electro-assistance. The membrane exhibited a 31.9% removal rate for 5 mg/L BPA with a permeance of 6.8 L/(m 2 ·h·bar), while the removal rate was significantly improved to 98.1% after applying a voltage of 2.0 V to the membrane. Furthermore, when BPA coexisted with humic acid, the membrane maintained 94% removal of total organic carbon and nearly 100% removal of BPA at 2.0 V over the entire filtration period. Compared to continuous voltage applied to the membrane, an intermittent voltage (2.0 V for 0.5 h with an interval of 3.5 h) could achieve comparable BPA removal efficiency, because of the combined effect of membrane adsorption and subsequent electrochemical oxidation. Density functional theory calculations and BPA oxidation process analyses suggested that BPA was adsorbed by two main interactions: π–π and hydrogen-bond interactions. The adsorbed BPA was further electro-degraded into small organic acids or mineralized to CO 2 and H 2 O. This work demonstrates that NF membranes coupled with electro-assistance are feasible for improving the removal of weakly charged or uncharged micropollutants.
研究领域:
环境科学
·
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2022
·
IF 6.76
Tao Song,Qinglong Luo,Fengfeng Gao,Bing Zhao,Xiaogang Hao,Zhong Liu
Technical research on electrochemical acid-free desorption of boron is imminent, and layered nickel hydroxide is a potential boron-responsive active electrode material. In this paper, nickel hydroxide was used to remove boron from aqueous resources by electro-assisted and conventional adsorption methods. The option of conditions by nickel hydroxide adsorption for boron is mild (pH: 7 ∼ 9) with an exothermic process. Interestingly, the synergistic effect of physical and chemical adsorption improves the adsorption rate and adsorption capacity of nickel hydroxide for boron under the action of the electric field, and the adsorption performance is better at low voltage (0.2 ∼ 0.4 V). The equilibrium time of the electro-assisted method is 4 times shorter than conventional adsorption methods, and the maximum adsorption capacity can reach 57.5 mg/g than conventional adsorption (45.4 mg/g). In addition, the nickel hydroxide has selectivity in high-concentration anion solutions and can be easily regenerated by an alkaline solution. Therefore, it is expected that nickel hydroxide with the electro-assisted method could be a potential approach for the high-efficiency and eco-friendly removal of boron.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
Journal of Water Process Engineering
·
2024
·
IF 6.3
Minyuan Han,Haoquan Zhang,Yinshuang Hu,Lu Zhou,Chengyue Bian,Yuanyuan Yu,Jingmei Yao,Chun Yang,Zenamarkos Sendekie,Heng Liang,Le Han
Electrified membrane is considered an alternative solution to the trade-off between permeability and fouling/wetting resistance of hydrophobic membranes. Herein, we reported a facile and universal carbon nanotubes (CNT)-based surface coating methodology followed by crosslinking with polyvinyl alcohol (PVA) toward robust electrified hydrophobic membranes. The physicochemical properties including sheet resistance of the as-prepared membranes were scrutinized over a varying mass loading of the CNT and PVA. Serving as the cathode in membrane distillation (MD), the CNT-modified membrane exhibited excellent anti-oil-fouling performance against hexadecane-in-water emulsions of 500 ppm in addition to an improved water vapor flux against brackish water regardless the substrate membrane. In particular, at a cell potential of 3 V, the fouling constant for electrified membrane was reduced up to 100 % compared to the control, with a negligible flux decline by only 4 %. Such a data was in line with the membrane-foulant interactive energy analysis, indicating the significance of the enhanced electro-repulsion with the cell potential applied. Interestingly, the fouling-resistance of polytetrafluoroethylene membrane was significantly improved to a comparable level with the other counterparts, as illustrated by the electrochemical impedance spectroscopy data. This study confirms that the CNT-modification together with an electro-assistance paved the way for electrified hydrophobic membrane of superior fouling resistance.
研究领域:
环境工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
PLoS One
·
2024
·Vol. 19
·期 10
·e0311430
·
IF 2.9
Qi Wang,Chu-Ya Wang,Heng-Deng Zhou,Dong-Xin Xue,Xiao-Lu Xiong,Guangcan Zhu
Herein, Mg/Al-loaded sludge-based biochar was prepared via electro-assisted impregnation. The structure and chemical analysis of modified sludge-based biochar (MgSBC-0.5(@Al) showed that the material was loaded with MgO and Al 2 O 3 . The specific surface area of MgSBC-0.5(@Al) was 11.27 times higher than that of unmodified sludge-based biochar (SBC). The simultaneous adsorption performance of MgSBC-0.5(@Al for ammonia nitrogen (NH 4 + –N) and phosphate phosphorus (PO 4 3− –P) was studied. The maximum adsorption capacities of MgSBC-0.5(@Al for NH 4 + –N and PO 4 3− –P at 298 K were 65.19 and 92.10 mg·g −1 , respectively, 4.45 and 6.28 times higher than those of SBC. The external and internal elemental compositions of the modified and unmodified biochar specimens were quantitatively characterized using inductively coupled plasma mass spectrometry, X-ray photoelectron spectroscopy, and X-ray fluorescence spectrometry. The results emphasized the importance of Mg-loading for NH 4 + –N and PO 4 3− –P capture. MgO was mainly loaded on the surface of biochar, enabling adsorption through chemical reactions. Analysis showed that the adsorption of NH 4 + –N and PO 4 3− –P on the modified biochar proceeded simultaneously through multiple mechanisms. Particularly, the adsorption of NH 4 + –N and PO 4 3− –P occurred through the precipitation of struvite and physical adsorption, with PO 4 3− –P also adsorbed through the formation of MgHPO 4 and CaHPO 4 . Other data indicated that Al, Ca, and Fe had a trapping effect on the adsorbate. Importantly, the biochar after adsorption could be used as a soil amendment.
研究领域:
环境科学
·
农业科学
✓ 已验证
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2021
·
IF 7.312
Xiaojiao Chen,Yuexin Han,Peng Gao,Hui Li
In recent years, sulfur-doped modified iron-based catalysts have been widely used to activate peroxymonosulfate (PMS) or peroxydisulfate (PDS) for the contamination elimination, however, the manufacturing complicated and costly limit further industrial application. Therefore, a new water purification technology using pyrite activation PMS with electro-assisted is developed, and the parameters are adjusted and underlying mechanism is clarified. It has been found PMS is effectively activated by FeS 2 , achieving ~90% tetracycline hydrochloride (TCH) removal. Sulfide is the main electron donor for activation PMS and mediates the regeneration of Fe(II) on the pyrite surface, and different sulfur conversion intermediates such as short-chain polysulfides S n 2− , elemental sulfur S 0 , and sulfate form from the oxidation of sulfides (S 2 2− ). Moreover, the iron ions in-situ generation from pyrite activation PMS involve in TCH degradation, and concurrently is greatly affected by current, PMS and pH. The production of hydroxyl radicals ( OH) and sulfate radicals (SO 4 − ) by pyrite-activated PMS is confirmed by electron paramagnetic resonance (ESR) and quenching tests. Finally, the mechanism is proved electro-oxidation, non-radical-oxidation and radical-oxidation synergistically eliminate TCH in EC/PMS/pyrite system. Overall, this study provides a new horizons for heterogeneous activation PMS and unveils the advantages and potential applications of sulfur-containing iron-based activators.
研究领域:
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Xuan Zhang,Weiquan Zhan,Qizheng Weng,Shaoxian Song,José Luis Arauz-Lara,Feifei Jia
With increasing demands for rare earth elements (REEs) in high-tech and futuristic applications, developing efficient methods for recovering low-concentration REEs is necessary. Here, electro-assisted sorption of low-concentration REEs , La(III), Gd(III) and Y(III) (as symbol of light, medium, and heavy REEs) on carbon-based materials, activated carbon (AC), graphene, and graphite by a facile method was reported. Recovery of La(III), Gd(III) and Y(III) could reach ∼100 % under low-concentration condition where the maximum adsorption capacity was up to 342.38 mg/(g·dm 2 ). Variants including applied voltage, electrodes-distance, pH, impurities, and concentration were considered to study the effects on REEs recovery. Interestingly, adsorption capacity and recovery under low voltage were respectively almost 20 and 14 folds than that without voltage, because voltage promoted REEs transfer and strengthened electrostatic interaction between electrodes and REEs. The mechanism for enhancing REEs recovery on carbon-based electrodes was resulted from high electric double layer (EDL) capacitance and low charge transfer resistance. Total desorption of REEs from electrodes could be quickly realized using NH 4 Cl or HCl solution. Overall, the study gave a new insight of low-concentration REEs recovery using carbon-based materials, and provided an efficient route using electric method with porous materials for REEs recovery.
研究领域:
材料科学
·
环境科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Wanli Yue,Li Chen,Libing Ren,Yongrui Qin,Gaohui Fan,Jianxin He,Weili Shao
The development of nanofiber sponge materials with three-dimensional structures, high porosities, and large specific surface areas is crucial for the rapid separation of water-in-oil emulsions. In this study, we fabricated Janus mullite nanofiber (MNF) sponges with efficient oil–water separation performance using a novel combination of electrostatic-assisted solution blow spinning ( E -SBS) and in situ growth. MNF sponges weighing 0.074 g were subjected to 100 compression cycles, with the stress reducing to 85.6 % of its initial value after impregnation with ZIF-8 nanoparticles and OTS. Consequently, the MNF sponges changed from hydrophilic to hydrophobic, and after 20 separation experiments, they still maintained high separation fluxes for oil–water mixtures and emulsions, achieving 7959 and 1803 L m −2 h −1 , respectively. Moreover, the preparation process of the MNF sponges is environmentally friendly, causing no environmental pollution. Therefore, Janus MNF sponges show great potential for applications in oil–water separation.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
LAB ON A CHIP
·
2019
·Vol. 19
·期 11
·1953-1960
·
IF 6.914
Jingmei Li,Tiantian Kong,Jiazuo Yu,Kit Hang Lee,Yuk Heng Tang,Ka-Wai Kwok,Ji Tae Kim,Ho Cheung Shum
The rope coiling observed in liquid ink with high viscosity has been exploited in additive printing to fabricate architectures with periodically curled structures and tune their mechanical properties. However, the control over the coiling path relying on mechanical motion restricts the spatiotemporal resolution. We develop an electrically assisted high-resolution technique to manipulate coiling paths of viscous ink and structures of the deposited filament. By spatially programming the voltage applied onto the viscous ink, we show that the switching between different filament structures can be accomplished at single wavelength resolution, facilitating the rapid and accurate construction of sophisticated patterns. Furthermore, translational guiding of the electrocoiling enables rapid printing of filaments with complex structures at a line speed of 102 mm s−1. With a simplified trajectory of the printing head, large-area and multiscale patterns can be printed at an unprecedented speed; for instance, centimeter-sized architectures constructed from nanofibers with micron-sized curled structures can be completed in a few minutes. By enabling the printing of complex fiber networks with tunable shape and density, our work provides a route towards custom-design of fiber architectures with unique features such as spatially varying mechanical properties.
研究领域:
材料科学
·
制造工程
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Polymer Materials
·
2025
·
IF 4.7
Wanli Yue,Li Chen,Hengtao Liang,Libing Ren,Gaohui Fan,Wanying Han,Liang Zhu,Shengli Zhu,Jianxin He,Weili Shao
Oil leakage has become a global public environmental problem and has caused serious harm to the global environment. Inorganic nanofibers with high porosity, large specific surface area, and excellent high temperature resistance have a wide application prospect in oil–water separation. In this study, we prepared mullite nanofiber (MNF) sponges for efficient oil–water separation using electrostatic-assisted solution blow spinning (E-SBS) and characterized its morphology, structure, mechanics, thermal stability, and oil–water separation. The results show that MNF sponge has ultralight weight (5.135 mg cm–3) and excellent temperature resistance (−196 to 1300 °C). Further, the sponge maintained 73% of its initial stress after 100 compression cycles; it did not deform significantly after high-temperature or liquid nitrogen treatment, showing excellent mechanical properties. Most importantly, after WD-10 modification, MNF sponges maintained high oil throughput ((oil-in-water oil flux >1600 L m–2 h–1), (oil–water mixture oil flux >7000 L m–2 h–1)), separation efficiency (>98%), and contact angle (>139°) after 20 separation experiments. More importantly, the preparation process of electrostatic assisted solution spray spinning MNF sponge is environmentally friendly and pollution-free and can be mass produced. Therefore, MNF sponges will have a very large application potential in the field of oil–water separation.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·Vol. 14
·期 1
·120857
·
IF 7.2
Xinyu Ren,Weili Shao,Kaiyang Cao,Ningbo Zhao,Jingyu Ma,Weichang Xiao,Ying Cao,Fan Liu
Existing air filtration materials suffer from short service life, limited load capacity, and lack of multifunctional properties such as chemical degradation resistance. To address these limitations, this study combined electrostatic-assisted solution blow spinning (E-SBS) with in situ growth of metal-organic frameworks (MOFs) to produce a scalable MOF-808@polyvinylidene fluoride/dopamine 2 (MOF-808@PVDF/DA2) micro/nanofiber composite membrane. The multiscale PVDF/DA micro-nanofiber composite membrane produced via electrostatic-assisted solution blow spinning exhibits small pore size (0.67 μm) and high porosity (92.23 %). Following dopamine (DA) modification and MOF-808 loading, the membrane exhibits outstanding filtration performance (filtration efficiency: 99.98 %, quality factor Q f : 0.129 Pa −1 ), long-term dust-holding capacity (dust-holding capacity up to 22.9 g m −2 ), and excellent catalytic degradation performance (98.7 % degradation rate within 30 min). Notably, the MOF-808@PVDF/DA2 membrane exhibits high air permeability (158 mm s −1 ), effectively reducing energy consumption during filtration. After multiple cycles of use, filtration efficiency remains as high as 98 %, demonstrating a long service life. This study proposes an innovative strategy for designing next-generation protective materials that integrate filtration and catalytic detoxification functions.
✓ 已验证
产品关联
DOI
高影响因子
Environmental Science-Water Research & Technology
·
2022
·Vol. 8
·期 11
·2652-2662
·
IF 5.819
Jiansuxuan Chen,Xueye Wang,Yang Li,Ruobin Dai,Zhiwei Wang
The performance of nanofiltration (NF) membranes will inevitably be compromised by membrane fouling in real practice. Electro-conductive NF membranes with the assistance of an external electric field have strong prospects in membrane fouling mitigation. In this study, we developed a facile approach to synthesize a conductive thin-film composite (TFC) NF membrane. Kevlar hydrogel was first pre-coated on a stainless steel mesh (SSM) for the formation of a conductive composite support (SMM-K) through phase inversion. The hydrogel medium enabled adequate amine monomer storage and thereby a homogeneous interfacial polymerization (IP) reaction, producing a dense and continuous polyamide (PA) active layer. The synthesized SSM-K-PA NF membrane showed an ∼70% increase of water permeance compared to the NF270 membrane while maintaining an ideal SO42−/Cl− selectivity (95.3 ± 1.0% for Na2SO4 rejection and 15.5 ± 1.8% for NaCl). The attachment of the hydrogel and the deposition of the PA layer did not significantly affect the electrochemical properties of the SSM. The SSM-K-PA NF membrane acted as the cathode in an electrically-assisted NF system and showed an antifouling performance against wastewater containing bovine serum albumin (BSA) when an external electric field was applied in situ. This work paves a new way to fabricate conductive TFC NF membranes with favorable NF performance and electro-assisted fouling mitigation potential.
研究领域:
膜科学
·
环境工程
·
材料科学
·
水处理
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2019
·
IF 4.175
Xue Ma,Hao Wang,Hongwei Xie,Jiakang Qu,Xiang Chen,Fei Chen,Qiushi Song,Huayi Yin
An Electro-Assisted Powder Metallurgical (EPM) route is able to prepare porous NiTi alloys with controllable porosities and pore sizes using nickel (Ni) and titanium (Ti) powders at a temperature ranging from 850 to 950 °C. Ammonium hydrogen carbonate (NH 4 HCO 3 ) was used as a sacrificial space holder to tailor the porosity and pore size of the NiTi alloy and its properties, i.e., elastic modulus , phase transformation temperature, shape memory effect, and superelasticity . By optimizing the synthesis temperature and content of the sacrificial space holder (0–30%), the porosity (41–75%), pore size (22–174 μm ), elastic modulus (4.77–0.87 GPa) and the recovery strain (>2%) of the EPM-NiTi can meet or are close to the standard of natural bone (porosity: 30%–80%, pore size: 100–600 μm, cancellous modulus: < 3 GPa, recovery strain: > 2%). Therefore, the EPM route is promising to prepare porous Ti-based alloys for implants.
研究领域:
材料科学
·
冶金学
·
生物材料
·
生物医学工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）