APPLIED SURFACE SCIENCE
·
2023
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IF 6.7
Yu Zhang,Hong Zheng,Pengyi Zhang,Qi Zuo,Baichao Zhang,Zhi Geng,Yanan Yang,Xueying Ren
The functionalization of metal–organic frameworks (MOFs) has been considered an effective strategy for promoting heavy metals removal from water. Therefore, a novel post coordination modulation method was systematically studied to synthesize ZIF-8 functionalized by 2,5-Dimercapto-1,3,4-thiadiazole (Post-ZIF-8-DMTD) for trace heavy metals removal from drinking water. The effects of addition time and addition amount of DMTD on the structure and adsorption performance of Post-ZIF-8-DMTD were investigated. It was found that addition time of DMTD had minor impact, while addition amount of DMTD had great impact, appropriate DMTD addition amount (375 mg) could not only provide sufficient active sites but also avoid self-polymerization of DMTD. Post-ZIF-8-DMTD exhibited a more regular structure than Before-ZIF-8-DMTD synthesized by direct coordination of mim and DMTD with Zn 2+ , and had faster adsorption rate and deeper purification capability for trace Pb(II). Post-ZIF-8-DMTD also exhibited good stability, wide suitable pH range, high maximum adsorption capacity (4.34 mg/g) that met WHO effluent Pb(II) concentration standard and excellent capture capacity for many trace heavy metals in tap water, and could be regenerated effectively with thiourea solution. The post coordination modulation method provides a novel and efficient strategy for the functionalization of MOFs, and Post-ZIF-8-DMTD has excellent application prospects in drinking water purification.
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
·
2024
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IF 8.4
Xinling Zhao,Peng Zhao,Dan Cao,Jun Xiang,Kaijun Li,Jingang Liu,Yanqun Su,Gongyan Liu
Ultrafiltration (UF) membranes made from cellulose acetate (CA) have garnered significant interest in drinking water purification due to their sustainability and biodegradability. However, their widespread application is hindered by weak mechanical properties and insufficient resistance to fouling. This study addresses these challenges by introducing an anionic isocyanate cross-linker (MDI-DMPA) with carboxyl groups to cross-link CA with cationic quaternized cellulose nanocrystals (QCNC), resulting in a mixed-charge cross-linked cellulose acetate-based membrane (CMQ) with zwitterionic characteristics. The high Young's modulus of QCNC, combined with the effective cross-linking capabilities of MDI-DMPA, enhances the tensile strength of the CMQ membrane to 5.9 MPa, approximately 2.2 times that of the pure CA membrane. Additionally, the CMQ membrane with the hydrophilic zwitterionic interface exhibits superior water permeance of 268 L m⁻ 2 h⁻ 1 bar⁻ 1 and a low irreversible resistance, outperforming the commercial RC 030 cellulose membrane. Notably, a large-scale CMQ membrane (0.4 × 0.6 m) effectively treats complex surface water, achieving a filtration rate of 1405 L·day⁻ 1 and producing water that complies with the drinking water standards set by the World Health Organization (WHO). These findings underscore the potential of CMQ membrane for engineering applications in drinking water purification.
研究领域:
材料科学
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环境工程
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水处理技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2025
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IF 11.3
Qian Zheng,Ziwei Wang,Zhouyang Tian,Lin Cai,Chengfeng Jiang,Lili Deng,Dazhong Yang,Zhenhua Wei
The development of cost-effective point-of-use (POU) devices that effectively remove lead (Pb) from drinking water is imperative in mitigating the threat of Pb contamination to public health in underdeveloped regions. Herein, we have successfully transformed inexpensive natural kaolinite as hydroxy-sodalite (HySOD) via a simple hydrothermal process, achieving an impressive yield of 91.5 %. Remarkably, HySOD demonstrates excellent selectivity and affinity towards Pb 2+ with an adsorption capacity of 476 mg/g in a single Pb 2+ system and a high distribution coefficient of 5.0 × 10 7 mL/g in multi-cations system, several orders of magnitude higher than other cations, showing remarkable Pb 2+ removal efficiency. Mechanism studies reveal that the preeminent Pb 2+ capture capacity of HySOD is mainly attributed to the fast surface chemisorption effects and spontaneous phase change from Na 8 Al 6 Si 6 O 24 (OH) 2 ·2H 2 O to Pb 4 Al 6 Si 6 O 24 (OH) 2 ·5H 2 O caused by cation exchange effects. Through a continuous filtration test, a simplified HySOD-loaded POU device is employed to treat Pb-contaminated water with the Pb 2+ concentration of 200 μg/L. At a high water flux of 477 L/m 2 /h, the Pb 2+ effluent concentration is swiftly reduced below 10 μg/L, well meeting the security standard for drinking water. Overall, this work introduces a remarkable Pb 2+ removal material, showing significant application potential for POU drinking water purification.
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
MICROPOROUS AND MESOPOROUS MATERIALS
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2021
·
IF 5.455
Yanzhao Shi,Xueying Ren,Hong Zheng,Yu Zhang,Qi Zuo
The removal of lead in drinking water has attracted considerable attention of researchers in recent years, especially, the trace characteristic of lead is a challenge to water treatment. Herein, 13X zeolite/reduced graphene oxide composite material (13X-rGO) with hierarchically porous structure was successfully prepared using graphene oxide (GO) and 13X zeolite via a chemical reduction method and presented great performance for removing trace Pb(II) from drinking water. The influence of some important parameters including adsorbent dosage, contact time, initial lead concentration, coexisting competing ions, solution pH value, etc. on the removal of Pb(II) was systematically investigated. The composite material showed better adsorption properties compared with a single component and their physical mixture, confirming the synergistic effect of rGO and 13X zeolite on Pb(II) adsorption. The effluent lead concentration could be decreased to the level permitted by World Health Organization (WHO) (<10 ppb) within 30 s under calcium content of 20 ppm and initial lead concentration of 150 ppb. Simultaneously, the as-prepared 13X-rGO performed excellent adsorption capacity meeting WHO standard (6.07 mg/g), which was about 2.23 times that of single 13X zeolite (2.72 mg/g). In the presence of interfering ions, the lead concentration could still be reduced to safe drinking water standard. Moreover, the adsorbent could be effectively regenerated by saturated sodium chloride solution. Therefore, 13X-rGO can be introduced as a promising adsorption material for the purification of drinking water contaminated with trace lead owing to rapid adsorption, low cost and recycling potential.
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
SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Bin Shang,Mengyao Zhu,Zongwei Wang,Junhao Chen,Xiang Fu,Huiyu Yang,Ziwei Deng,Pei Lyu,Jiehao Du,Dongzhi Chen,Shaojin Gu,Xin Liu
The worsening of the freshwater crisis undoubtedly poses great challenges to the normal production and life of human beings. Developing multifunctional materials that are capable of both atmospheric water harvesting and undrinkable water purification is highly desirable for freshwater production but is rare. In this study, a super-hygroscopic photothermal material (WCBs@SA/MNPs/MOFs) composed of environmentally polluting waste cigarette butts (WCBs), sodium alginate (SA), metal–organic framework-Zr (MOF-801) and melanin nanoparticles (MNPs) was successfully fabricated. Benefiting from the simultaneous loading of moisture-absorbing MOF-801 and photothermal MNPs into the porous structure of WCBs, freshwater production consisting of efficient atmospheric water harvesting (daily water production of ∼ 1.41 L kg −1 at low relative humidity of 20 % and 5.42 L kg −1 at higher relative humidity of 80 %, respectively) and eco-friendly solar-driven undrinkable water purification (water evaporation rate ∼ 2.72 kg m -2 h −1 , 1 kW m −2 ) can be realized concurrently. We believe this research not only mitigates environmental pollution caused by discarded cigarette butts and enhances their economic value, but also expands the options for freshwater production with multiple positive implications.
研究领域:
环境科学
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材料科学
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水资源管理
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2020
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IF 7.183
Qian Shen,Sun-Jie Xu,Zhe-Qin Dong,Hai-Zhen Zhang,Zhen-Liang Xu,Chuyang Y. Tang
A green method for safety drinking water production was proposed in this study by the development of a positively charged nanofiltration (PNF) membrane composed of two different functional layers. Glycosyl layer was fabricated through interfacial polymerization in which the performances of sucrose doped NF membrane was superior to the glucose and raffinose doped membranes, which were further enhanced by alkali treatment. Sucrose (0.8 wt%) and NaOH (0.05 mol‧L −1 ) benefit the formation of higher porosity and better hydrophilicity and offer a high pure water flux (13.5 L m −2 h −1 ·bar −1 ) and Na 2 SO 4 rejection (99.3%). Then, the PNF membrane was acquired by coating polyethyleneimine (PEI) on the sucrose-polyamide layer. The concentration of PEI and grafting time were both studied and the optimal membrane showed an excellent performance for heavy metals removal . The as-developed membrane has found its potential application in drinking water purification which gave 90% rejection for heavy metals and the permeance reached to 7.4 L m −2 h −1 ·bar −1 . With the proposed method, the trace elements were retained partially which was beneficial to the human body and the toxic metals were kept within the limits.
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
WATER RESEARCH
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2020
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IF 9.13
Juan Tang,Hui Jia,Situ Mu,Fei Gao,Qingwen Qin,Jie Wang
The polymer coagulant aid can effectively enhance the coagulation-ultrafiltration (C-UF) process for the purification of drinking water . However, when coagulant aid entered the filtration, it may also cause serious membrane fouling as polymer. In-situ Raman spectroscopy and electrochemical impedance spectroscopy(EIS) were applied to monitor the effects of coagulant aids on the membrane. The causes of fouling were assisted discussed through stage cleaning of the membrane. The equivalent circuit fitting was performed on the EIS data and the Raman spectral data were statistically analyzed after peak fitting. EIS and the cluster analysis of Raman spectroscopy provided an earlier feedback on membrane fouling layers compared to flux. The cause of membrane fouling was explained via variation of characteristic functional groups obtained by Raman spectroscopy. When the molecular weight of the coagulant aid was 160 times,80 times and 16 times larger than the MWCO of the UF membrane, the equivalent circuit obtained by fitting the EIS of the UF system satisfied Rs + c(QpRp), Rs(QcRc)(QpRp) and Rs(Qt(Rc(QpRp))) respectively. Partial correlation analysis showed that the corresponding factors causing irreversible fouling of membrane were humic acid(HA), HA and coagulant aids, coagulant aids. Combined with the mean roughness (Ra) of membrane, the coagulant aid performed differently in the cleaning of contaminated membrane and also affected the cleaning of HA.
研究领域:
环境科学
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分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2021
·
IF 3.764
Peng Gao,Sun-Jie Xu,Zhen-Liang Xu,Ping Li,Yu-Zhe Wu,Lan-Qian Li,Hai-Zhen Zhang
High-flux fine hollow fiber nanofiltration (HFNF) membranes were prepared by interfacial polymerization (IP) using polysulfone (PSF) ultrafiltration (UF) membranes with an outer diameter of 425 μm as the substrate for the treatment of drinking water. Trimesoyl chloride (TMC) was selected as the organic phase monomer, while poly(vinyl alcohol) (PVA) was added into piperazine (PIP) aqueous phase solution to reduce the surface defects and to enhance the separation performance of the NF membrane. The as-prepared fine HFNF membranes had a large packing density and effective area. The optimal preparation conditions of the fine HFNF membrane were determined by orthogonal experiments in which the flux of the membrane reached 34.2 ± 1.5 L·m–2·h–1·bar–1, while its salt rejection sequence was as follows: Na2SO4 (97.6 ± 1.5%) > MgSO4 (96.1 ± 1.8%) > MgCl2 (83.5 ± 2.1%) > NaCl (27.9 ± 2.6%). During the long-term stability test for 132 h, the membrane retained a high flux (>23.7 ± 1.5 L·m–2·h–1·bar–1) and high Na2SO4 rejection (>97.2 ± 1.1%). Additionally, it exhibited huge potential for application in drinking water purification in which the as-prepared NF membrane exhibited excellent antifouling performance for bovine serum albumin (BSA).
研究领域:
环境科学
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材料科学
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水处理技术
✓ 已验证
DOI
高影响因子
JOURNAL OF ENVIRONMENTAL MANAGEMENT
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2025
·
IF 8.4
Yifei Luo,Guohe Huang,Yongping Li,Jing Huang,Yao Yao,Peng Zhang,Zixin Zhang,Jian Shen,Jianan Yin,Xiujuan Chen,Yuwei Wu,Mengna Li,Kai Zhao,Sichen Gao,Chun Zhang
Ensuring the safe removal of fluoride from drinking water poses a significant challenge in numerous remote communities affected by fluoride contamination. Therefore, this study focuses on the in-situ growth of MOF—AlFu on ceramic filters (CFs), thereby synthesizing in-situ MOF-modified ceramic filters (IMCFs) for effective fluoride removal from drinking water in such communities. Initially, we conducted response surface optimization of the IMCF preparation process, followed by comprehensive characterization. Based on SEM, XRD, and FTIR analyses, it is confirmed that AlFu successfully grows on the surfaces and within the pores of CFs, forming layered structures that enhance the effective adsorption of fluoride on IMCFs. Besides, zeta potential and FTIR results indicated that electrostatic adsorption, ion exchange and hydrogen bonding are the primary mechanisms of fluoride adsorption on IMCFs, which is also confirmed by the adsorption kinetics. The results of adsorption isotherms show that the maximum adsorption of IMCFs is 9.51 mg/g. Within the pH range of 4–10, IMCFs reduced the fluoride concentration from 10 mg/L to below 1.2 mg/L. Furthermore, the IMCF retains over 75 % of its adsorption capacity after undergoing five use cycles, exhibiting remarkable durability during the multiple cycling filtration process. This study suggests that the developed IMCF can serve as a safe and effective defluoridation technology for purifying drinking water in remote communities.
研究领域:
环境科学
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材料科学
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水处理技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ENVIRONMENTAL TECHNOLOGY
·
2025
·
IF 2
Ye Jia,Lingxue Kong,Tengdi Zhang,Yuping Wang,Anmin Liu,Liguo Gao,Tingli Ma
Convenient and portable, sustained provision of safe drinking water is crucial for wilderness survival. In this study, a portable water collection bag utilising solar-driven interface evaporation technology has been developed. The water collection bag includes a plastic film, CB-PS microsphere evaporator, and a small vial. By placing on the water surface, the CB-PS microspheres float and absorb sunlight to quickly evaporate the surrounding water. The plastic film and vial make it easy and fast to collect clean and safe drinking water. The device boasts an impressive evaporation rate of 1.64 kg·m⁻²·h⁻¹ under 1 sun illumination. Moreover, the portable water collection bag can withstand harsh acidic and alkaline conditions, efficiently removing organic contaminants from wilderness water sources to meet drinking water standards. Importantly, it is designed for repeated use without any water evaporation rate decreasing. The portable water collection bag also exhibits strong resistance to salt, making it suitable for applications in desalinating seawater into freshwater.
研究领域:
材料科学
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环境科学
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水资源管理
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Weihua Xu,Yanling Liu,Kaiming Fan,Ziyi Yuan,Siqi Wang,Linjun Li,Shengji Xia
The widespread presence of hardness ions in surface water poses potential challenges for drinking water treatment, which can be efficiently removed by nanofiltration (NF) membranes. Compared with mainstream spiral-wound polyamide ones, hollow fiber (HF) NF membranes present a promising alternative due to the potential advantages in operation. This study investigated the ion rejection properties of a commercial polyelectrolyte multilayer (PEM)-based HF NF membrane by treating surface water with varying hardness levels, respectively resembling the raw water hardness of northern and southern areas of China. Results show that compared to NF270 membrane, the PEM HF NF membrane had a thicker separation layer with higher surface hydrophobicity, leading to a lower water permeance. Despite the predominantly negatively charged surface, the PEM HF NF membrane achieved high CaCl 2 and MgCl 2 rejections of 85.4 % and 90.2 %, respectively. During surface water treatment, the PEM HF NF membrane maintained stable water purification performance after several cycles of backwashing and outperformed NF270 membrane in removing organic matters and hardness ions. The distinct ion rejection characteristics and underlying mechanisms for the PEM HF NF membrane treating surface water with different hardness levels were comprehensively elucidated. Moreover, the membrane negative rejection of Na + in low hardness water affected by the Na + /Cl - molar ratio in the feed was particularly interpreted. This study provides performance demonstration and mechanistic insights for promoting the potential application of PEM HF NF membranes for drinking water treatment.
研究领域:
环境科学
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材料科学
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水处理工程
✓ 已验证
产品关联
DOI
高影响因子
Desalination and Water Treatment
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2024
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IF 1
Quanbin Shi,Hongwei Zhang,Peng Zhao,Yuan Zhang
ABSTRACT The filtering material is the key to determine filtering effect, the study found that the soda lime glass has high negative zeta potential, hydroxylation of soda lime glass medium, and then using γ-methylacryloxy propyl trimethoxysilane oxygen radicals silane (MPS) in three oxygen radicals silane coupling, and then the MPS of C=C key with C=C bond potassium salt of propyl methacry-late 3-sulfonate (SPM) polymer grafting modified filter material is prepared. The study shows that changing the amount of SPM can make the negative potential layer have different charges, and the potential can be as high as –148.19 mV. Under the condition of 50 mM and 1 mL/min, the graft-modified filter media showed a better filtration effect on specific pollutants, and the removal rates of Fe 3+ , Mn 2+ and NH 4 + by 24-mesh graft-modified filter media were 62.18%, 71.53% and 61.85%, respectively. The removal rates of the above pollutants by 32-mesh grafted modified filter media can reach 85.72%, 87.49% and 79.69%, respectively. At the same time, the grafted modified filter media has good cycle stability, and the removal effect of 32-mesh modified filter media only decreased by 4.06% compared with the same period last year.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）