JOURNAL OF ENVIRONMENTAL MANAGEMENT
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2022
·
IF 8.91
Jia Liu,Shengzhi Wei,Huili Zhang,Yimin Deng,Jan Baeyens,Raf Dewil,Nick Sweygers,Lise Appels
Adsorption is a widely applied waste water treatment technology , especially for removing micro-pollutants and dyes of industrial effluents . Over the past decade, adsorbing metal oxide micron- and nano-particles have been successfully developed and investigated as adsorbents. In the present research, Mg-ferrite adsorbent particles were synthesized and their properties were fully determined. The pore volume is 0.139 cm 3 /g. The BET analysis reveals a surface area of 94.4 m 2 /g. The porosity is of meso- and microporous nature. The adsorbent was used to adsorb acid fuchsine, an important industrial dye. The equilibrium adsorption capacity was 796.4 mg/g, with an adsorption yield of 78.7–82.0%. The adsorption kinetics can be adequately fitted by a pseudo-second-order model. The isotherms of both Langmuir and Freundlich are applicable. The stability, recovery and reuse of the ferrite particles were proven in multi-cycle experiments, and the adsorption activity decreased by less than 3% between the first and fifth cycle. Experimental and fitting results were finally used to design a batch adsorber to remove a given concentration of acid fuchsine from different volumes of wastewater.
研究领域:
环境科学
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材料科学
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产品关联
DOI
PubMed
高影响因子
Bioresources and Bioprocessing
·
2018
·Vol. 5
·期 1
·1-8
·
IF 0
Gao Zhen,Yi Yunfei,Zhao Jia,Xia Yongyang,Jiang Min,Cao Fei,Zhou Hua,Wei Ping,Jia Honghua,Yong Xiaoyu
Background Laccase, a multicopper oxidase that catalyzes the oxidation of phenols, aromatic amines, and benzenethiols, has attracted much attention in applications of organic synthesis, bioremediation, and pulp/textile bleaching. However, free laccases cannot be recycled and are easily inactivated in diverse environmental conditions. Enzyme immobilization is a promising strategy to improve stability, resistance to extreme conditions, and reusability of laccase. Results In this study, amino-functionalized magnetic Fe 3 O 4 nanoparticles were synthesized for co-immobilization of 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO) and laccase by glutaraldehyde cross-linking method. The magnetic nanoparticles were characterized with FTIR, XRD and VSM. Cyclic voltammetry was carried out to verify electrochemical behaviors of the co-immobilized laccase and TEMPO nanoparticles. When the co-immobilized laccase and TEMPO nanoparticles were used to decolorize acid fuchsin, the maximum decolorization rate of 77.41% was obtained with the ratio of TEMPO to laccase being 0.3 mM/g:120 U/g. Conclusion The co-immobilized nanoparticles retained above 50% residual activity after eight cycles of operation, which presented an approach to develop a co-immobilized laccase and mediator system for potential industrial application.
研究领域:
生物化学
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环境科学
✓ 已验证
DOI
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
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IF 5.4
Caiqin Su,Defeng Hu,Hongtian Yang,Yide Han,Yufeng Liu,Ying Zhang,Xia Zhang
In this study, bi-functions of surface adsorption and laccase like catalysis were integrated by the hybrid membranes of Cu-MOF (Cu-2MI) uniformly incorporated polyvinylidene fluoride (PVDF) for the first time, which endow an unexpected utility in surface physical adsorption and chemical catalytic engineering. In which, the loading of Cu-2MI was varied to optimize the surface performance of the membranes. The adsorption conditions were optimized based on batch adsorption experiments, and the adsorption kinetics, isotherms, and thermodynamics were discussed by using theoretical models to elucidate the adsorption mechanism. In addition, the laccase-mimicking catalytic performance of these Cu-2MI/PVDF hybrid membranes was explored based on the colorimetric reaction of 2,4-dichlorophenol (2,4-DP). The laccase-like catalytic kinetics, including K m and V max , were determined, and their catalytic stability under varying pH, temperature, organic solvents, and storage time was systematically tested and compared to that of free laccase. The maximum adsorption capacity of the obtained Cu-2MI/PVDF hybrid membrane for acid fuchsin (AF) is 4789.5 μg cm −2 . Moreover, the hybrid membrane exhibits a good linear relationship in the range of 5.0–750 μM in adrenaline detection, with a detection limit of 3.60 μM. This work highlights the exceptional surface activity and stability of the Cu-MOF/PVDF hybrid membranes, which ensure promising applicability in surface physical and chemical engineering.
研究领域:
材料科学
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环境工程
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生物催化
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产品关联
DOI
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
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2024
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IF 4.8
Yiwen Li,Shikuan Xu,Yangyang Zhang,Rui Du,Rong Li,Yanjun Xing
MimDES-ZIF-8 with rich active sites as positive charges and metal coordination sites were prepared based on imidazole based deep eutectic solvent (MimDES) using interface permeation method. 2-Methylimidazole (2-Mim) simultaneously acted as a hydrogen bond acceptor (HBA) in MimDES (hydrogen donner was 1,6-hexanediol) and an organic ligand in MimDES-ZIF-8, affecting the coordination of ZIF-8 during permeation. Four different zinc salt solutions (ZnCl 2 , Zn(NO 3 ) 2 ·6H 2 O, Zn(OAc) 2 ·2H 2 O, ZnSO 4 ·7H 2 O) were permeated into MimDES to obtain MimDES-ZIF-8 with different morphologies. All MimDES-ZIF-8 had higher Zn/N ration (>0.25), specific surface area and surface positive charges. The dye adsorption results indicated that MimDES-ZIF-8 showed high adsorption efficiencies for acid fuchsin (all exceeded 97.75 % under pH 7.5) and a fast adsorption rate (exceeding 93 % in 5 min and reaching equilibrium in 60 min). Among MimDES-ZIF-8, the adsorption capacity of ZIF-8-C was 4845.3 mg/g. After five cycles of adsorption, the AF removal efficiency of ZIF-8-C remained over 93.23 %. Moreover, ZIF-8-C also had good adsorption capacity for anionic dyes CR, cationic dyes MB and BB. The adsorption process aligned well with both the Langmuir model and the pseudo-second-order kinetic model. Based on FTIR, XPS, and electrostatic potential calculation, the adsorption mechanism was elucidated.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
Frontiers of Chemical Science and Engineering
·
2019
·Vol. 13
·期 2
·340-349
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IF 2.809
Zhou Rusen,Zhou Renwu,Zhang Xianhui,Bazaka Kateryna,Ostrikov Kostya Ken
Continuous processes which allow for large amount of wastewater to be treated to meet drainage standards while reducing treatment time and energy consumption are urgently needed. In this study, a dielectric barrier discharge plasma water bed system was designed and then coupled with granular activated carbon (GAC) adsorption to rapidly remove acid fuchsine (AF) with high efficiency. Effects of feeding gases, treatment time and initial concentration of AF on removal efficiency were investigated. Results showed that compared to the N 2 and air plasmas treatments, O 2 plasma processing was most effective for AF degradation due to the strong oxidation ability of generated activated species, especially the OH radicals. The addition of GAC significantly enhanced the removal efficiency of AF in aqueous solution and shorten the required time by 50%. The effect was attributed to the ability of porous carbon to trap and concentrate the dye, increasing the time dye molecules were exposed to the plasma discharge zone, and to enhance the production of OH radicals on/in GAC to boost the degradation of dyes by plasma as well as in situ regenerate the exhausted GAC. The study offers a new opportunity for continuous effective remediation of wastewater contaminated with organic dyes using plasma technologies.
研究领域:
环境科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POLYMER RESEARCH
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2022
·Vol. 29
·期 11
·1-9
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IF 3.061
Wang Biao,Wan Xin,Liu Ziqian,Zhong Jinrong,Tan Jinglin,Li Yan,Zhang Yue-Fei
In this paper, the organic gel polyacrolein (PA OG ) was prepared by NaOH-induced ionic polymerization with acrolein as raw material, which presented good adsorption performance on acid fuchsin (AF). It has been characterized using BET, FT-IR, zeta potential measurements, and XPS to determine the structural and physicochemical properties of PA OG . The adsorption performance was examined in relation to contact time, temperature, and pH value. According to the results, polyacrolein gel adsorbent had a fast adsorption rate, and the adsorption process basically reached equilibrium in the first thirty minutes, which agreed with the pseudo-second-order kinetics. It was determined that the adsorption isotherm conformed to the Langmuir model, which was the endothermic spontaneous reaction (ΔH > 0, ΔG < 0). The five executed adsorption–desorption cycles of AF suggested a good reusability of PA OG . These results can help us better understand the adsorption mechanism of PA OG on AF and provide useful treatment method for removing AF.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2018
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IF 5.091
Zhibo Yang,Liang Zhu,Lin Chen
Core-shell structured NH 2 -functionalized UiO-66 magnetic composites (γ-Fe 2 O 3 @C@UiO-66-NH 2 ) were fabricated via a simple, facile and green approach to investigate their adsorption behaviors towards different organic dyes (methylene blue, malachite green , acid fuchsin and acid orange II). Different characterization methods containing XRD , TEM , EDXA , FTIR, BET and XPS were used to indicate that the as-prepared γ-Fe 2 O 3 @C@UiO-66-NH 2 material exhibited core-shell structure and excellent surface performance. Adsorption experiments showed that γ-Fe 2 O 3 @C@UiO-66-NH 2 could selectively adsorb anionic dyes and effectively separate the mixture, which might be mainly ascribed to the negatively-charged anionic dyes as opposite to the positively-charged Zr metal sites in γ-Fe 2 O 3 @C@UiO-66-NH 2 . The kinetics and adsorption isotherm of acid orange II and acid fuchsin adsorption in γ-Fe 2 O 3 @C@UiO-66-NH 2 were also investigated. For acid orange II and acid fuchsin, the maximum adsorption capacity obtained from the Langmuir isotherm model was 48.12 mg/g and 31.54 mg/g, respectively. Moreover, γ-Fe 2 O 3 @C@UiO-66-NH 2 exhibited good structural stability and reusability, which suggesting that γ-Fe 2 O 3 @C@ UiO-66-NH 2 as an easy-prepared adsorbent material exhibited great application potential in the selective removal of dyes from water systems.
研究领域:
环境科学
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材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2023
·Vol. 34
·期 18
·1-12
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IF 2.8
Yao Yao,Liao Gangli,Cui Huina,Dong Wenbin,Zhao Zhen
A novel monodispersed In 2 O 3 @ZIF-8 core–shell nanocomposites (CSNCs) are prepared via a simple sonochemical synthesis route in this work. It is found that the encapsulation of In 2 O 3 nanoparticles into ZIF-8 shell can greatly extend the light response of CSNCs into visible light region. Benefiting from the large surface area, porous nanostructure and synergistic effect between In 2 O 3 and ZIF-8, the In 2 O 3 @ZIF-8–175 CSNC exhibits selectivity and ultra-high photocatalytic activity for organic dye acid fuchsin removal. This work not only provides a general synthesis route for fabrication of such unique and monodispersed core–shell heterostructures but also paves a new way for high performance photocatalyst for other hazardous ions selective removal in practical application.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2023
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IF 8.6
Hai Liang,Jianjiang Wang,Wanting Wang,Yingli Wang,Xinzhong Deng,Zhishuang Xue,Yang Sun,Gaohong He,Xuehua Ruan
Developing efficient biochar (BC) adsorbent for pollution removal has been a long-term exploration. However, the negative charge surface of pristine BC seriously impedes the transfer of anionic dye through the pore of BC and results in low adsorption capacity. Herein, N-doping enriched porous MgO-modified biochar (MBC) was successfully prepared through a facile nitrate activation method for anionic acid fuchsin (AF) removal. The N-doped group of secondary amine in MBC changes the surface charge of BC and facilitate the AF adsorption onto MgO . The as-prepared MBC exhibited superior adsorption capacity of 328 mg⋅g −1 . The adsorption process was well aligned with the Freundlich and pseudo-second-order kinetics models indicating a hybrid physicochemical adsorption mechanism. Further mechanism investigation indicates that N-doped group, MgO and functional groups in biochar matrix primarily contribute to AF adsorption. The mechanism includes: electrostatic attraction, π-π interaction, hydrogen bonding and pore filling. This research provides an environmentally friendly nitrate activation strategy for BC, which overcomes the inherent defects of BC in negative charge surface and provides a facile way of biomass valorization for pollution removal from the aquatic environment.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
DALTON TRANSACTIONS
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2021
·Vol. 50
·期 25
·8927-8937
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IF 4.39
Ying Liu,Na Wang,Zhongqiao Sun,Yide Han,Junli Xu,Yan Xu,Junbiao Wu,Hao Meng,Xia Zhang
MOF/polymer hybrid membranes integrate the surface activity of MOFs and the advantages of PVDF membranes, and can be used as adsorption membranes in the efficient removal of target organics. In this work, a new hybrid membrane of ZIF-67/PVDF with varying ZIF-67 dosages has been fabricated through a facile mechanical blending followed by a lyotropic phase transition. Methods including field-emission scanning electron microscopy (FESEM), X-ray diffraction (XRD), FT-IR analyses and surface hydrophobicity/hydrophilicity measurements are applied to characterize the structure, physicochemical properties and membrane performances. Two synthetic triarylmethane dyes, cationic malachite green (MG) and anionic fuchsin acid (FA), are chosen as the main adsorption targets to evaluate the adsorption capacities of the resulting ZIF-67/PVDF hybrid membranes. Interestingly, all of the ZIF-67/PVDF hybrid membranes exhibit distinctly favorable efficiencies and selectivities toward MG and FA compared to pristine PVDF, which proves the positive roles of ZIF-67 in the adsorption ability of the hybrid membranes. The adsorption conditions are optimized and the adsorption kinetics and thermodynamics are analysed to study the adsorption mechanism. The reusability and the structural stability of the hybrid membranes undergoing cyclic adsorption processes are also discussed. To the best of our knowledge, this is the first time that good adsorption capacities for MG and FA for these MOF/PVDF membranes have been reported. This work highlights the prospective applications of MOF/PVDF hybrid membranes in the rapid and effective removal of target organics in the treatment of waste water.
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
PubMed
高影响因子
DESALINATION
·
2024
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IF 8.3
Yuanyuan Yang,Guijing Chen,Ting Lei,Qingqing Qin,Shaowen Huang,Ming He,Shuhao Qin
Herein, a thin and high-potential loose nanofiltration (LNF) membrane was fabricated by one-step cross-linking with branched polyethyleneimine (PEI) using the reactive sites on the styrene maleic anhydride/chlorinated polyvinyl chloride membrane surface to for alkylation and nucleophilic addition reactions, respectively. As the molecular weight of branched PEI increased, the thickness of LNF membranes decreased and their pore sizes and surface potential increased (i. e., potential value of LNF membrane above 59 mV at pH = 7). Density functional theory calculations were used to understand the separation mechanism of LNF membranes. The rejection mechanisms of these membranes for Brilliant Blue R250, Methyl blue, Congo red, and Acid fuchsin were based on size-sieving, with rejection for all >95 %. However, the rejection mechanisms of Bromocresol green and Bromothymol blue were affected by the size-electrostatic synergy. Pleasingly, the NaCl rejection was <10 %. Furthermore, the 22 k-PEI-modified LNF membrane could not only effectively separate dye/NaCl under high pressure and high salinity but also maintain long-term stable desalination performance. Notably, the assessment of dye rejection in LNF membranes revealed that it is not solely based on the molecular weight of dye but is also related to the geometric shape of the organic substance.
研究领域:
材料科学
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化学工程
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2024
·
IF 8.4
Wenyong Yang,Miaomiao Jia,Wei Shao,Zhen Chen,Jiajia He,Qingyun Wu,Panpan Zhang,Ming Xue,Yi Li
There is an increasing demand for advanced membranes that exhibit both high perm-selectivity and good stability in organic solvents , particularly for organic solvent nanofiltration (OSN). Traditional methods of synthesizing thin films using conventional interfacial polymerization (CIP) have been limited by the use of water-soluble monomers , which has hindered the development of high-performance membranes. To address this issue, a new method called organic-organic interfacial polymerization (OOIP) has been proposed. This method allows for the use of aromatic amines that are not water-soluble in the fabrication of ultrathin polyamide (PA) (<40 nm) thin film composite (TFC) membranes. By investigating five different organic solvents (tetrahydrofuran, acetone, N , N -dimethylformamide, N , N -dimethylacetamide, dimethyl sulfoxide) with varying water content as the organic phase for a water-insoluble benzidine monomer, two diffusion models of monomers were identified that resulted in different membrane structures and degrees of network crosslinking. The ultrathin PA membranes produced using tetrahydrofuran-H 2 O and N , N -dimethylformamide-H 2 O, along with solvent activation, demonstrated high methanol permeances of 11.4 L m −2 h −1 bar −1 and 6.0 L m −2 h −1 bar −1 , respectively, while maintaining exceptional rejections of over 99.0 % for small molecules with molecular weights greater than 452 g mol −1 . The OOIP method is scalable and reproducible, making it suitable for large-scale membrane production. This innovative approach shows great potential for advancing OSN technology and providing efficient and cost-effective separation solutions for various industries.
研究领域:
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
危险品化学品经营许可证（带存储）