Membranes
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2022
·Vol. 12
·期 6
·601
·
IF 4.562
Xiaohuan Li,Noor Ul Afsar,Xiaopeng Chen,Yifeng Wu,Yu Chen,Feng Shao,Jiaxian Song,Shuai Yao,Ru Xia,Jiasheng Qian,Bin Wu,Jibin Miao
Every metal and metallurgical industry is associated with the generation of wastewater, influencing the living and non-living environment, which is alarming to environmentalists. The strict regulations about the dismissal of acid and metal into the environment and the increasing emphasis on the recycling/reuse of these effluents after proper remedy have focused the research community’s curiosity in developing distinctive approaches for the recovery of acid and metals from industrial wastewaters. This study reports the synthesis of UiO-66-(COOH)2using dual ligand in water as a green solvent. Then, the prepared MOF nanoparticles were introduced into the DMAM quaternized QPPO matrix through a straightforward blending approach. Four defect-free UiO-66-(COOH)2/QPPO MMMs were prepared with four different MOF structures. The BET characterization of UiO-66-(COOH)2nanoparticles with a highly crystalline structure and sub-nanometer pore size (~7 Å) was confirmed by XRD. Because of the introduction of MOF nanoparticles with an electrostatic interaction and pore size screening effect, a separation coefficient (SHCl/FeCl2) of 565 and UHClof 0.0089 m·h−1for U-C(60)/QPPO were perceived when the loading dosage of the MOF content was 10 wt%. The obtained results showed that the prepared defect-free MOF membrane has broad prospects in acid recovery applications.Keywords:UiO-66;diffusive dialysis;cation separation;acid recovery
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Processes
·
2021
·Vol. 9
·期 6
·1049
·
IF 2.847
Jinbei Yang,Guangkai Dai,Jing Wang,Shuai Pan,Gang Lu,Xiaoke Shi,Danni Tang,Jinyi Chen,Xiaocheng Lin
Diffusion dialysis (DD) employing anion exchange membranes (AEMs) presents an attractive opportunity for acid recovery from acidic wastewater. However, challenges exist to make highly acid permeable AEMs due to their low acid dialysis coefficient (Uacid). Here, a series of porous and highly acid permeable AEMs fabricated based on chloromethyl polyethersulfone (CMPES) porous membrane substrate with crosslinking and quaternization treatments is reported. Such porous AEMs show highUacidbecause of the large free volume as well as the significantly reduced ion transport resistance relative to the dense AEMs. Compared with the commercial dense DF-120 AEM, our optimal porous AEM show simultaneous 466.7% higherUacidand 75.7% higher acid/salt separation factor (Sacid/salt) when applied to acid recovery at the same condition. Further, considering the simple and efficient fabrication process as well as the low cost, our membranes show great prospects for practical acid recovery from industrial acidic wastewater.Keywords:anion exchange membrane;diffusion dialysis;acid recovery;porous membrane
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
JOURNAL OF MEMBRANE SCIENCE
·
2022
·
IF 10.53
Shuaijun Yu,Hao Qian,Junbin Liao,Jun Dong,Lu Yu,Chunhong Liu,Jiangnan Shen
Recovery of sulfuric acid from industrial wastewater via electrodialysis (ED) has become a hot topic recently. Since the commercially used anion exchange membranes (AEM) generally lead to the severe proton leakage during ED process, the efficiency of the acid recovery was seriously affected. In this work, a series of proton blockage cross-linking AEM has been prepared by modifying poly(vinylidene fluoride- co -hexafluoropropylene) (PVDF- co -HFP) with 1-vinylimidazole, followed by crosslinking with 1,4-dibromobutane. Our investigation demonstrates that the as-prepared PVDF- co -HFP-based AEM has the observable asymmetric structure on the two sides of the AEM with a smooth and dense surface and a rough and porous surface. The asymmetric structure and the hydrophobicity of the fluorinated backbone of AEM render the improved proton blocking performance, and the increased electrical efficiency and reduced energy consumption of acid recovery. For example, the optimized AEM (AEM-0.5) exhibits the acid concentration with the values of c H + = 2.04 M (initial proton concentration: 1.0 M) in concentrate cell during 12 h-ED process at current density of 20 mA cm −2 and low energy consumption of 1.75 kw·h·kg −1 relative to the commercial NEOSEPTA® AHA and proton blockage ACM AEM. It is believed that this study can provide a guideline for designing advanced proton blocking AEMs.
研究领域:
材料科学
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环境工程
✓ 已验证
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2019
·
IF 7.015
Peipei Song,Meng Wang,Bopeng Zhang,Yuxiang Jia,Yongsheng Chen
One of difficulties in electrodialysis (ED)-based waste acid reclamation lies in how to separate protons from metal cations efficiently and economically. A proton permselective composite membrane (PPCM) is specially designed for the process as evidenced by a porous polysulfone membrane and a cross-linked chitosan layer, which perform functions of support and separation, respectively. Herein, a series of PPCM fabricating conditions are analyzed, including casting solution composition, cross-linking agents, and the coating process . Subsequently, the changes in chemical composition and microstructure are explored by ATR-FTIR spectroscopy, SEM and the measurement of porosity and average pore size. Furthermore, the investigations on the electrodialytic transport properties of PPCM are performed, including electrical resistance, limiting current, water transport behavior, and proton permselectivity. Notably, ED experiments show some PPCM performances are even better than those of conventional cation-exchange membranes (CEMs), such as relatively low leakage of metal cations and water migration behavior, relatively high energy efficiency and productivity. However, the proton permselectivity of PPCM for metal cations will weaken with increase of current density, and its proton permselectivity for anions is inferior to CEM. Nevertheless, in view of its many advantages, this paper indicates PPCMs have a promising application prospect.
研究领域:
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
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Shichao Zhang,Yong Li,Xinxin Li,Jingjing Gu,Hongwei Shao,Qiang Huang,Peng Cui,Yahua Liu,Jin Ran,Cen-Feng Fu
Two dimensional (2D) TaS 2 laminates have highly regular and ordered transfer mass channels, thus being promising acid recovery membrane candidates for diffusion dialysis (DD) applications to discern H + and metallic ions. However, it remains a daunting task to get access to high-performance 2D acid recycling membranes made from single TaS 2 nanosheets . Here, we report manipulation of the chemical environments of TaS 2 channels to develop excellent acid recycling 2D membranes. As demonstration projects, positively charged poly(diallyldimethylammonium chloride) (PDDA) and poly(4-vinylpyridine) (P4VP) in acid solution were chosen as polycation intercalators to modify the TaS 2 2D channels. Under the DD mode, the TaS 2 membrane exhibits a H + dialysis coefficient (U H + ) of 3.72 × 10 −3 m h −1 and separation factor (S) of 9 towards the simulated acid pickle. In contrast, the U H + and S value of the PDDA@TaS 2 membrane improve to 12.7 × 10 −3 m h −1 and 34.4 respectively. Those of the P4VP@TaS 2 membrane increase to 12.5 × 10 −3 m h −1 and 29.1 respectively. The reported acid recovery properties of PDDA@TaS 2 and P4VP@TaS 2 membranes exceed the commercial DF-120 acid recovery membranes. The experiment and simulation results reveal that the synergistical enhancements of U H + and S originate from the incorporating polycations in PDDA@TaS 2 and P4VP@TaS 2 composite channels.
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
LETTERS IN ORGANIC CHEMISTRY
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2023
·Vol. 20
·期 11
·1089-1093
·
IF 0.8
Li Runlai,Zhang Zhenming,Ji Jiangyu,Li He,Liu Chi,Li Shu-an
The conventional mixed acid nitration of aromatic hydrocarbons has been extensively applied in the industry, but usually, it is not highly selective and may cause environmental concerns regarding the disposal of large volumes of mixed acids. This paper proposes a new method of orientational
para-nitration of easily hydrolyzable aromatic compounds. Under the optimized reaction conditions, the easily hydrolyzed aromatic compounds were nitrated in the H2SO4-HNO3-H3PO4 system to yield paste-like products. And the product could
be directly filtered out from the mixed acid, avoiding a large amount of waste liquid caused by pouring the reaction mixture into ice water by the traditional post-treatment method. The selectivity and yield of nitration by this method have been improved, and the mother liquor could be reused,
thereby reducing the cost and pollution.
研究领域:
化学工程
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环境科学
✓ 已验证
DOI
高影响因子
EUROPEAN POLYMER JOURNAL
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2023
·
IF 6
Jiancong Pan,Manru Liu,Biaowen Wei,Shijun Liao,Xiuhua Li
Three kinds of long-side-chain-modified tadpole-type anion exchange membranes (AEMs) named QPEK-DMODAs with microphase separated structures designed for electrodialysis (ED) acid recovery were fabricated from N,N-dimethyloctadecylamine (DMODA) as quaternization agent and poly(arylene ether ketone) (PEK) as skeleton, which is the copolymer of 2,2′,6,6′-tetramethyl biphenol (TMBP) and 4,4′-difluorobenzophenone (DFBP). QPEK-DMODAs were characterized systematically including basic structures and properties, ED recovery performance of H 2 SO 4 solutions without or with metal impurities, and corrosive acid stability. The well-defined microphase separation structure of QPEK-DMODA-3 is formed by the suitable distribution of tadpole ionic groups at the highest IEC of 2.09 mmol g −1 . The aggregate structure offers the membrane competent mechanical stability, ion conductivity and permselectivity, as well as low energy consumption and water transport ratio at the ED process. QPEK-DMODA-3 exhibits higher current efficiency (54.58 %) and recovery H + concentration (1.74 M) than those of QPEK-DMODA-1, QPEK-DMODA-2 and commercial AMX with comparable energy consumption to that of AMX under the ED conditions of Fe 2+ absence. Moreover, the Fe 2+ removal rate (88.74 %) and ion selectivity (S = 57.32) of QPEK-DMODA-3 are remarkably higher than those of AMX (67.10 % and 17.32) without the scarce of recovery efficiencies in the ED recovery tests of 0.50 M H 2 SO 4 solution containing 0.10 M of Fe 2+ . The combination of the comparable tolerance to strong acid to that of AMX and the confirmed good ED recovery performances declares a strong potential of tadpole-type QPEK-DMODA-3 in waste acid recovery by electrodialysis.
研究领域:
化学工程
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2024
·
IF 2.7
Yong Chen,Shengxuan Fan,Chao Peng,Bingyue Song,Mengting Qin,Yi Wang,Yanjun Huang,Shefeng Li,Lei Zhang
Diffusion dialysis (DD) with anion exchange membranes (AEMs) as the core component is an ideal technology for acid recovery from acidic wastewater. Herein, a series of TEA–BPPO AEMs were prepared from triethanolamine (TEA) and brominated polyphenylene ether (BPPO) using the solution casting method. The structures of the prepared membranes were characterized and analyzed through nuclear magnetic resonance hydrogen spectroscopy (1H NMR), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared (FTIR) spectroscopy, and scanning electron microscopy (SEM). In addition, the properties of the membranes, such as ion exchange capacity (IEC), linear swelling rate (LSR), water uptake (WU), chemical stability, thermal stability and mechanical stability, were explored. In DD experiments, the optimal AEM (i.e., TEA–BPPO–M80) applied to simulate acid recovery from a mixed HCl (1 mol L−1)/FeCl2 (0.2 mol L−1) solution exhibited an acid dialysis coefficient (UH+) of 0.0629 m h−1 and separation factor (S) of 97.78, which were significantly better than those of the commercial membrane DF-120. In addition, the TEA–BPPO–M80 AEM exhibited excellent thermal stability and acid resistance. In summary, the prepared membranes possess great potential for application in DD acid recovery.
研究领域:
化学工程
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2025
·
IF 9
Haiyang Shao,Zhengke Tan,Yafei Cheng,Xiang'an Yue,Lei Yuan,Weixiong Jian,Longqiang Xiao,Xiaocheng Lin
Diffusion dialysis (DD) presents a highly promising and cost-efficient approach for acid recovery, yet its performance is often hindered by the acid permeability of anion exchange membranes (AEMs). To address this challenge, a one-step approach has been developed to fabricate porous AEMs. Using brominated polyphenylene oxide (BPPO) as the porous base membrane, imidazole is employed for in-situ crosslinking and cationization. This approach not only retains the inherent porosity (>63.5 %) of the base membrane but also achieves an exceptionally thin selective layer (<0.3 μm), thereby creating abundant free space volume. Through a concurrent enhancement of ion transport sites and crosslinking density, the membrane effectively breaks acid permeability–selectivity trade-off. The optimal IPPO-20h AEM demonstrates a remarkable increase in both the acid dialysis coefficient ( U H + = 34.1 × 10 −3 m/h) and separation factor ( S H + / F e 2 + = 573.8) in the HCl/FeCl 2 system, with enhancements of 4- and 31-fold, respectively, compared to the commercial DF120 AEM, at 25 °C. This high-performance AEM, synthesized via a straightforward and mild process, offers significant potential for large-scale acid recovery applications.
研究领域:
化学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2016
·
IF 5.557
Jin Ran,Min Hu,Dongbo Yu,Yubin He,Muhammad Aamir Shehzad,Liang Wu,Tongwen Xu
The development of polymeric anion exchange membranes (AEMs) for recycling acid is facing a serious difficulty, the desired acid passage and undesired salt leakage dilemma. Ionic domains are the only channels to conduct H + ions and metallic ions, and thus viable modifications on ionic domains render the permeation of two ions simultaneously enhanced or limited, leading to “trade-off” effect. Herein, we propose an origin strategy of “three-phase” AEMs to beat this “rade-off” effect. Apart from typical hydrophobic polymer backbone and hydrophilic cation phase domains, the auxiliary phase domains built by graphene oxide (GO) sheets were added. Due to the abundant oxygen containing groups distributing on GO, the auxiliary phase domains not only aid to transport H + ions, but also capture metallic ions. With only 0.5 wt% GO loadings, the “three-phase” AEM increased acid recovery efficiency and separation factor by 40% and 51% for the FeCl 2 /HCl system respectively, compared with the “two-phase” AEM. To explain these results, density functional theory (DFT) simulation was applied to study the interactions between GO and Fe 2+ ions.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2016
·
IF 5.557
Abhishek N. Mondal,Congliang Cheng,Muhammad Imran Khan,Md. Masem Hossain,Kamana Emmanuel,Liang Ge,Bin Wu,Yubin He,Jin Ran,Xiaolin Ge,Noor Ul Afsar,Liang Wu,Tongwen Xu
Rapid development of diffusion dialysis based on anion exchange membranes (AEMs) established its prominent significance as a leading candidate in the field of separation science and technology. AEM-based diffusion dialysis (DD) processes intended to acid recovery have generated much interest due to their exclusive selectivity. Here, we report the effects of novel Poly(DMAEM-co-γ-MPS)-based AEMs for DD applications (acid recovery). Free radical polymerization was successfully done with the initiator azobisisobutyronitrile (AIBN) to achieve the desired polymer Poly(DMAEM-co-γ-MPS). Finally, quaternization with EPTAC and methyl iodide was done to make the membrane matrix charged. The dosage of Poly(DMAEM-co-γ-MPS) inside membrane matrix plays a crucial role to determine the physiochemical and electrochemical properties of the prepared membranes. The influence of Poly(DMAEM-co-γ-MPS) on the acid recovery behavior of the membranes was explored in detail. The prepared membranes displayed high thermo-mechanical stability. At 25 °C, the acid dialysis coefficient (U H ) values were between 0.016–0.029 m/h, while the separation factors (S) ranged from 23.3 to 87.7. Both the acid recovery (7.25 times) and separation factors (~3.6 times) are much higher than the commercial fiber supported anion exchange membrane DF-120B (U H and S=0.004 m/h and 24.3, respectively). Prepared AEMs are the potent candidate for acid recovery via diffusion dialysis. The highlight of this work is the fabrication of new AEMs, which shows high acid dialysis performance and selectivity.
研究领域:
分离科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POLYMER SCIENCE
·
2022
·Vol. 60
·期 21
·3054-3063
·
IF 3.046
Xinqiang You,Jiaqi Chen,Lin Teng,Jiuyang Lin,Xiaocheng Lin
Diffusion dialysis (DD) for acid recovery is significantly restricted by the poor acid dialysis coefficient ( U H + ) of anion exchange membranes (AEMs). To overcome such problem, porous AEMs with extremely high free space volume have been fabricated herein based on porous membrane substrate, drawing inspiration from the dissolution-diffusion concept. Specifically, chloromethylated polyethersulfone (CMPES) has been used as the starting material to create the porous substrate via non-solvent phase inversion, then in-situ crosslinked and quaternized using ethylenediamine (EDA) and N-methylimidazole (NMI), respectively. In this study, the degrees of modification of EDA and NMI are controlled to adjust the microstructure and DD performance of the produced porous AEMs. The ideal AEM's U H + and acid/salt separation factor ( S ) are 4.3 and 2.6 times greater, respectively, than those of the commercial DF-120 membrane at the same condition. Additionally, it shows strong organic solvent resistance and thermal stability, and therefore demonstrate the potential for widespread use. Graphical
研究领域:
材料科学
·
环境工程
✓ 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）