Metals
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2023
·Vol. 13
·期 4
·677
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IF 2.9
Yuliang Chen,Xiangbiao Yin,Hao Fu,Zheyang Lin,Guangcan Ma,Xinpeng Wang,Qingsong Wang,Fangqiang Chen
Strontium, the main component of radioactive nuclear wastewater, is characterized by a high fission yield and an extended half-life. It is easily absorbed by the human body, thus greatly threatening the environment and the human body. In this study, a mesoporous composite phase sodium superionic conductor (NVP@NMP) was synthesized by the droplet template method, and the rapid capture of Sr2+from wastewater was achieved by constructing a nano-heterogeneous interface to increase the ion diffusion rate. NVP@NMP showed efficient and rapid removal of strontium ions in adsorption kinetics, isothermal adsorption, solution pH, and interfering ions concentration tests, especially using the equilibrium time of 2 min for strontium absorption by NVP@NMP and a maximum theoretical adsorption capacity of 361.36 mg/g. The adsorption process was spontaneous, endothermic, and feasible. At higher concentrations of other competing ions (Na, K, Ca, Mg, and Cs), the adsorbent exhibited higher selectivity towards Sr2+.TEM, XPS, and XRD analyses revealed that ion exchange was the main mechanism for the NVP@NMP ultrafast adsorption of Sr2+. In this research, we investigated the feasibility of ultrafast strontium capture by sodium superionic conductor structured phosphates and explained the ultrafast strontium adsorption mechanism of NASICON materials through XPS.Keywords:NASICON;ultrafast adsorption;strontium;ion exchange;wastewater
研究领域:
环境科学
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材料科学
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2024
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IF 8.1
Peiyan He,Xianshuang Zhu,Danqing Shen,Yue Ma,Xue Bai,Jianming Pan
Rapid treatment of uranium in seawater is an important topic that needs to be addressed urgently. Microgel materials are considered ideal for rapid adsorption due to their ability to absorb water quickly. In a seawater environment, amidoxime materials exhibit superior selectivity for uranium enrichment. However, the modification of amidoxime groups onto microgels must be conducted in organic solvents. These solvents are unable to sufficiently swell and dissolve common microgels, leading to shrinkage that nearly blocks all modification reactions. Here, the thermo-responsive N'N -diethylpropionamide (DEA) was chose as the skeleton monomer to synthesize microgels, which showed both good hydrophilicity and oleophilicity properties The difference between the particle size of synthesized microgels in water and ethanol was not obvious. Due to the integration of microgels and kairamidoxime materials, the AO-Microgels demonstrate a maximum adsorption capacity of 79.29% within just 3 min. Additionally, their selective adsorption capacity for uranium in simulated seawater is remarkable. Furthermore, it simplifies the recycling process because of its intelligent temperature responsiveness.
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
Journal of Materials Chemistry A
·
2018
·Vol. 6
·期 27
·13359-13372
·
IF 9.931
Yuanting Xu,Dandan Yuan,Jianxu Bao,Yi Xie,Min He,Zhengqiang Shi,Shengqiu Chen,Chao He,Weifeng Zhao,Changsheng Zhao
The development of highly efficient adsorbents with a fast adsorption rate and high adsorption capacity presents an enticing prospect for wastewater remediation. In this paper, a novel ultrafast adsorption nanofibrous membrane (UFAM) for organic dyes was prepared through a simple functional group surface migration method. An amphiphilic copolymer of methyl methacrylate and sodium styrene sulfonate was synthesized in a mass ratio of 3 : 2 by free radical polymerization and further blended into polyethersulfone (PES) to prepare functionalized PES nanofibrous membranes by electrospinning technology. Just by soaking in water and lyophilization, the hydrophilic and negatively charged sulfonate groups migrated and concentrated on the membrane surface, and the obtained UFAM was found to be exceptionally efficient in the removal of methylene blue (MB) dye from aqueous solution. Especially, an ultrafast adsorption rate for MB with an adsorption equilibrium time of within 5 min was reported for the first time. The mechanism of the ultrafast adsorption based on the sulfonate group migration and enrichment was also especially explored in this study. In addition, the UFAM also showed excellent performance of recyclability, dynamic filtration–purification, selective adsorption for cationic dyes from mixed dye solutions and smart filtration–separation for cationic and anionic dyes. Therefore, we envision that this study will not only provide a new strategy to construct low-cost and highly efficient adsorbents, but also demonstrate their potential applications in the removal of organic dyes on a large scale.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
Journal of Environmental Chemical Engineering
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2020
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IF 4.3
Zhao Zhao,Changning Bai,Lulu An,Xiaofang Zhang,Fan Wang,Yin Huang,Mengnan Qu,Yuanlie Yu
Wastewater treatment and separation technologies are critical to meet global challenges of insufficient water supply and inadequate resources. However, simple adsorption can no longer satisfy these demands, and thus more and more water recovery technologies have attracted attention. Here, we report a novel kind of porous BN nano/microrods with excellent features including high surface area of 1109.11 m²/g, large pore volume of 0.454 cm³/g and small pore size of 2.60 nm. These unique properties make the as-obtained porous BN nano/microrods show an ultrafast adsorption rate for the cationic dye methylene blue (MB + ), and they can also be able to selectively adsorb cationic dyes from the mixtures of anionic and cationic dyes. The corresponding selective adsorption mechanism is also proposed based on the microstructure and surface property of the as-obtained porous BN nano/microrods. Furthermore, the cytotoxicity test was performed and the results show that the as-obtained porous BN nano/microrods have good biocompatibility with the cell survival rate of 80 % after a test period of 5 days, and this result is much higher than that of commercial BN. This finding provides a new application field for BN nanomaterials to selectively adsorb/separate anionic and cationic dyes in organic dye-containing wastewater treatment.
研究领域:
材料科学
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环境科学
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生物学
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Chenghan Ji,Yuanjie Zhang,Zhuoyao Fang,Yi Ren,Weiming Zhang
Current research on heavy metal adsorbents primarily focuses on eliminating particular heavy metal ions. Nevertheless, there remains a pressing demand for adsorbents capable of efficiently capturing a wide range of heavy metals found in actual wastewater. We report a metal–organic framework (MOF-808-NTA) functionalized with aminotriacetic acid (NTA), which has broad-spectrum capabilities for capturing heavy metal ions. Experiments with 15 distinct heavy metal ions, including hard (e.g., Cr 3+ ), soft (e.g., Hg 2+ ), and borderline Lewis metal ions (e.g., Pb 2+ ), found that the material achieved over 99 % removal efficiency in both individual ion and single-ion scenarios. Importantly, MOF-808-NTA exhibited ultrafast adsorption kinetics (removal >99 % within 30 s) for multiple metal ions, including Cr 3+ , Hg 2+ , and Pb 2+ , excellent selectivity (removal >95 %) when competing substances like Na + , Ca 2+ , and humic acid; and remarkable recyclability (removal >97.5 % after 5 cycles). Furthermore, spectrum analysis and theoretical calculation calculations indicate that the NTA groups in MOF-808-NTA serve as the primary sites for adsorption. The nitrogen and two oxygen atoms within the NTA groups create claw-like structures, which ensure exceptional capture of heavy metal ions. This work underscores the promise of MOF-808-NTA to function as a versatile material for capturing diverse heavy metals from wastewater.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
CHEMOSPHERE
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2022
·
IF 8.943
Hongwei Wang,Fang Wu,Zhiheng Wang,Yang Wang,Shufang Zhang,Haijun Luo,Zhiqin Zheng,Liang Fang
Chromium (VI) removal is crucial to the safety of water resources, but there is still a lack of effective and fast dislodge methods, especially the on-site rapid remediation and emergency removal technology . Herein, the monolayer (ML) Ti 3 C 2 T x nanosheets (NSs) were prepared to remove Cr (VI) from water. The solution sample of the two-dimensional (2D) Ti 3 C 2 T x NSs demonstrate ultrafast adsorption kinetics (the concentration decreasing from 300 to 3 mg L −1 in 10 min) and impressively high capacity (1483 mg g −1 ), which is several times higher than that of the most reported Cr (VI) adsorption by Ti 3 C 2 T x . The analysis of the adsorption kinetics and isotherm models indicates that the adsorption reaction is endothermic, with physical and chemical adsorption coexisting (mainly monolayer chemical adsorption). The joint study of the experimental analysis and theoretical calculation based on the density functional theory (DFT) demonstrates that the extraordinary removal performance of Cr (VI) is due to the synergetic effect of reduction reaction removal and electrostatic adsorption. It is found that the Cr (VI) is mainly reduced by the OH- terminals on Ti 3 C 2 , and the detoxified Cr (III) is anchored on the surface of Ti 3 C 2 T x through complexation reaction with O terminal. The advantages of ultrafast adsorption kinetics and extra-high adsorption capacity of the single-layered Ti 3 C 2 T x for Cr (VI) removal make it a remarkable candidate for rapid and urgent removal of Cr (VI) wastewater.
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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水处理
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DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
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IF 9.7
Yan Feng,Chenxi Xu,Shuo Zhang,Xinqiang Jia,Yuxi Liu,Xinru Xiao,Jiaoping Wang,Yawen Yang
The transition to a circular “capture–concentrate–reuse” model for phosphorus is essential for sustainable wastewater treatment, yet achieving ultrafast and regenerative trace phosphate removal is challenging. Inspired by the multi-site binding in phosphate-binding proteins, we engineered alanine-intercalated MnLa-layered double hydroxides (MnLa-Ala-LDHs). This material synergistically combines redox-active Mn, high-affinity La 3+ , and zwitterionic alanine. It achieved record-breaking trace-phosphate removal—from 1.009 mg/L to 0.0016 mg/L (99.8 % removal) within 5 min, corresponding to an exceptionally high distribution coefficient (Kd) of 2140 L/g. The adsorbent demonstrates exceptional regenerability, retaining >93 % of its initial adsorption capacity over 10 consecutive adsorption-desorption cycles, while enabling ∼98.5 % recovery of the captured phosphate into a concentrated stream for reuse. Mechanistic studies confirm a synergistic adsorption mechanism and high anion selectivity. This work provides a scalable, bio-inspired adsorbent that serves as both an ultra-deep phosphate scavenger and a regenerable nutrient concentrate, advancing the circular phosphorus economy.
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DOI
PubMed
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
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2025
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IF 4.7
Rutong Zhang,Rong Lei,Xiaolei Fu,Lu Li,Yuhuan Nie,Qibin Chen
The separation of racemic mixtures remains a great challenge due to the similar physicochemical properties of enantiomers in achiral environment. In this work, three novel chiral hyper-crosslinked polymers (CHCPs), i.e., D 0-CHCP, D 1-CHCP and D 2-CHCP, were synthesized by tuning the D -phenylalanine ( D -Phe)/benzidine (BZD) ratios. Results show that all three CHCPs exhibit typically hollow cylindrical nanotube. D 1-CHCP and D 2-CHCP achieve ultrafast enantioselective adsorption of D - and L -Phe within 2 min, attributed to ultrathin-walled nanotubes having hierarchically porous structures. More importantly, D 2-CHCP has a high enantiomeric excess ( e.e. ) value of up to 56.01 %, likely due to the cooperative interplay between D 0-CHCP and the implanted chiral recognition unit, as evidenced by the control experiment that D 0-CHCP exhibits chiral separation capability to some extent. In addition, these CHCPs display excellent recyclability and generality for chiral small-molecule drugs. These findings demonstrate that nanotubular CHCPs with ultrathin wall thickness and hierarchically porous structures possess both superior enantioselectivity and ultrafast adsorption rates, thus offering significant potential for practical applications in enantioselective adsorption separation.
研究领域:
材料科学
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高分子化学
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手性分离
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吸附技术
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纳米技术
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）