SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
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IF 8.1
Zhenzhou Yin,Gang Wang,Lu Wang,Pengyu Ren,Jian Sun,Hanghang Zhao,Puhui Ji
The sustainable development of society requires the support of developed industrial production, which inevitably produces a series of industrial by-products, including heavy metal-containing wastewater and solid waste. Using solid waste to adsorb heavy metal ions in wastewater is a sustainable way. This not only reduces the environmental threat caused by solid waste accumulation, but also reduces the treatment cost of heavy metal ions in wastewater. In this study, fly ash was modified to prepare magnetic adsorbent (M-AT), which was used to adsorb Cu 2+ and Pb 2+ in wastewater. The results showed that M-AT has a good adsorption effect on Cu 2+ and Pb 2+ in wastewater. Its maximum adsorption capacity for Cu 2+ and Pb 2+ was 53.18 and 85.86 mg/g, respectively. Ion exchange and complexation reaction were major adsorption mechanisms of M-AT for Cu 2+ and Pb 2+ , they played an important role in the adsorption process. M-AT maintained a good adsorption effect on Cu 2+ and Pb 2+ under different influence factors. This ensured that M-AT can be used in complex application environments. In addition, M-AT exhibited good reusability, its removal rate for Cu 2+ and Pb 2+ reached 50.21 % and 75.15 % after 5 adsorption–desorption cycles. And the removal rate of M-AT for Cu 2+ and Pb 2+ in domestic sewage treatment plant influent, tailings drainage, industrial wastewater was 82.80 %, 87.12 %, 85.12 % and 95.10 %, 91.20 %, 93.13 %, respectively. These results proved the feasibility of M-AT in treating Cu 2+ and Pb 2+ in wastewater. This study provides a new way for the resource utilization of fly ash. Applying solid waste to treat heavy metal-containing wastewater is a sustainable way to treat industrial waste.
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
WATER RESEARCH
·
2024
·
IF 11.4
Yu Han,Liuqian An,Yan Yang,Yuling Ma,Hongliang Sun,Jinxin Yao,Tao Zhang,Wei Wang
Lithium ion sieve adsorbents frequently extract liquid lithium resources due to their adsorption effect and cost advantages. However, the adsorption effect is significantly influenced by the ambient pH. The pH effects on the adsorption process can be categorized into two main areas: the competition adsorption of impurity ions and the difference in surface zeta potential. A dual-matrix modulation adsorbent was prepared, comprising a carrier matrix modified with zwitterionic quaternary ammonium bases and an adsorption matrix modified with carboxylation. The zwitterionic quaternary ammonium base groups were employed to mitigate the competitive adsorption of impurity ions by acid-base neutralization. Furthermore, the negative charge of carboxyl groups was employed to diminish the discrepancy in surface zeta potential. The adsorption effect of the ion sieve adsorbent under natural conditions appeared to be significantly enhanced by the dual-matrix modulation, with the saturated adsorption capacity (28 mg/g) and adsorption selectivity (α(Li + /Mg 2+ )=24.23) being 6.3 and 7.8 times higher than that of the manganese-based adsorbent (HMO) under the same conditions, respectively. Moreover, the adsorption effect was found to be consistent with HMO under alkaline conditions. The results demonstrate that by optimizing the adsorption conditions of the adsorbent, the detrimental impact of pH on the adsorption process of lithium ion sieves can be eliminated.
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
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Jiayu Feng,Ruoxu Liu,Xuejin Yang,Shuo Cui,Rui Cao,Ping Ning,Fang Wang,Zibin Pan,Lijuan Jia
Efficient removal of the highly toxic gas phosphine (PH 3 ) from various exhaust gases is a major challenge. To address this, we developed a cost-effective NiO/TiO 2 adsorbent (Ni X /TiO 2 ) via facile impregnation, achieving efficient anaerobic PH 3 removal at a low temperature (350 °C) with an exceptional breakthrough capacity of 232.23 mg(PH 3 ) g −1 . Characterization revealed that superior performance stems from abundant surface basic sites, developed porosity, and strong NiO-TiO 2 interfacial interactions promoting PH 3 adsorption and dissociation. During PH 3 capture, phosphorus incorporation transforms active NiO into Ni 2 P species, leading to adsorbent deactivation. Crucially, recognizing the photocatalytic potential of both TiO 2 and Ni 2 P, we repurposed the spent adsorbent as a Ni 2 P/TiO 2 heterojunction photocatalyst. Proof-of-concept experiments demonstrated its high efficacy in visible-light-driven wastewater treatment, achieving 91 % degradation of malachite green (MG). This work advances PH 3 purification technology while establishing a sustainable circular economy strategy via repurposing deactivated adsorbents into photocatalysts, aligning with resource conservation and recycling.
研究领域:
环境化学
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材料科学
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工业催化
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绿色化学
·
废水处理
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产品关联
DOI
高影响因子
FUEL
·
2016
·
IF 3.611
Yingchao Hu,Wenqiang Liu,Hongqiang Chen,Zijian Zhou,Wenyu Wang,Jian Sun,Xinwei Yang,Xian Li,Minghou Xu
A screening of inert solid supports as metal skeletons of CaO-based sorbents was conducted in this work, aiming to provide the basis and guideline for the selection of inert solid refractories to produce high temperature CO 2 capture sorbent. We studied 12 different refractories including Al-, Ti-, Mn-, Mg-, Y-, Si-, La-, Zr-, Ce-, Nd-, Pr- and Yb-based supports, among which Yb and Pr are newly introduced ones. The sorbents were synthesized using the same wet-mixing method, by which the inert supports could be well dispersed among the ultra-fine active specie of CaO/CaCO 3 particles to fully play the role of frameworks for sintering resistance. The sorbents stabilized by these inert supports were also cyclically tested under the same conditions. Y- and Al-based supports were found to exhibit much superior cyclic performance than the other supports. Mn-, Mg-, La-, Yb- and Nd-based supports are also good candidates, whereas the other ones containing Ti-, Ce-, Zr-, Si- and Pr-based supports show less effectiveness. The melting point of the inert support and surface area of the synthetic sorbents are found to be the key factors to affect the sorbent performance.
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
ACS Omega
·
2023
·
IF 4.1
Shasha Huang,Yulong Shan,Xiaoyan Shi,Zhongqi Liu,Qiang Wang,Hong He
In the present work, we report on two passive NOx adsorber (PNA) material candidates: the novel support CeSnOx with and without Pd loading. The NOx adsorption and storage capacities of fresh and hydrothermally aged CeSnOx and Pd/CeSnOx were investigated. The results show that CeSnOx exhibits a rather large NOx uptake and storage capacity (28.9 μmol/g), while the loading of Pd on CeSnOx can further increase the storage capacity to 37.6 μmol/g and affect the desorption temperature of NOx. It was found that the NOx desorption temperature of Pd/CeSnOx was compatible with the efficient operating window of selective catalytic reduction (SCR) catalysts. After a hydrothermal aging treatment at 800 °C for 12 h, the NOx adsorption and storage capacities of CeSnOx and Pd/CeSnOx increased, indicating excellent hydrothermal stability. The interaction of Pd with CeSnOx, the state of Pd species, and the structure of CeSnOx and Pd/CeSnOx are studied by combination of the characterization results.
研究领域:
化学
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材料科学
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2018
·Vol. 25
·期 14
·13813-13822
·
IF 2.8
Liu Tongzhou,Gu Yurong,Xing Ding Yu,Dong Wenyi,Wu Xiuwei
Adsorption is well accepted as an effective method for perfluorinated compounds’ (PFCs) removal from water among various conventional methods. However, development of adsorbents that combine good performance of PFC removal and regenerability has not yet been realized. This work demonstrated the fabrication and application of an ammoniated magnetic adsorbent for efficient and economical PFOS and PFOA removal. Functional ammonium groups and γ-Fe 2 O 3 were effectively incorporated in the particle with the proposed method. These fabricated magnetic particles presented superior adsorption performance for PFOS and PFOA with short equilibrium time of 120 min and high adsorption capacity. The isotherms revealed that the adsorption process belonged to multilayer sorption with their intricate interactions including anion exchange and hydrophobic interaction. The magnetic particle maintained its removal efficacy over a wide pH range of 3–9 or with coexisting substances. Moreover, the regeneration and reuse of the magnetic particle were successfully carried out with PFOS and PFOA removal efficiency sustained higher than 80% in 15 consecutive treatment cycles. Along with the efficient adsorption and easy separation of adsorbents, we expect that this ammoniated magnetic particle can serve as an excellent alternative for PFOS and PFOA removal from water.
研究领域:
环境科学
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材料科学
✓ 已验证
DOI
PubMed
高影响因子
HYDROMETALLURGY
·
2019
·
IF 3.465
Zhenning Lou,Mengnan Huang,Junshuo Cui,Shuyao Wu,Shanshan Xing,Peng Zhou,Weijun Shan,Ying Xiong
Technetium ( 99 Tc), a radionuclide generated from uranium fission in nuclear reactors, has posed a major threat to humans due to its long half-life and radioactivity. Therefore, it is urgent to develop a strategy of selectively and efficiently capturing of 99 Tc. In this work, a series of solid copolymers (denoted as DVB-[C x ClVim][Cl]) were synthesized for efficient adsorption of perrhenate (ReO 4 − , a surrogate for TcO 4 − ) from mixed ions solution. The adsorbents with vinylimidazolium-based ionic liquid as functional group and divinylbenzene (DVB) as the basic framework exhibited stable structure and good ReO 4 − adsorption performance. The influences of the linear n-alkyl chain length on the morphology and adsorption property of the copolymers were discussed in detail. The maximum uptake of Re(VII) on DVB-[C 4 ClVim][Cl] was 517.61 mg·g −1 . Rhenium could be separated from molybdenum in the presence of co-anions and co-cations by DVB-[C 6 ClVim][Cl], which demonstrated its good adsorption selectivity . The kinetic studies showed that pseudo-second-order model was more suitable for describing the behavior of Re(VII) adsorption. The adsorption mechanism was ion-exchange between Cl − and ReO 4 − confirmed by FI-IR, IC and XPS analysis. Additionally, DVB-[C x ClVim][Cl] remained effective Re(VII) capture ability after eight adsorption/elution cycles, demonstrating their good reusability.
研究领域:
环境科学
·
材料科学
·
放射化学
✓ 已验证
DOI
高影响因子
ADSORPTION SCIENCE & TECHNOLOGY
·
2018
·
IF 0.609
Liyun Yang,Xiaoming Qian,Zhi Wang,Yuan Li,Hao Bai,Hong Li
This study investigates the removal effectiveness and characteristics of phenanthrene and naphthalene using low-cost steel slag with batch experiments. The adsorption characteristics of steel slag were measured and analysed using X-ray fluorescence, X-ray diffraction, and Fourier transform infrared spectroscopy. The batch experiments investigated the effect of the time gradient, pH, and steel slag dosage gradient on the adsorption of the steel slag. The results show that with time and dosage of steel slag increased, the adsorption capacity of phenanthrene and naphthalene increased and gradually became balanced, but pH had no obvious effect on the adsorption of phenanthrene and naphthalene. The Langmuir isotherm model best describes the phenanthrene and naphthalene removal by the steel slag, which shows the adsorption occurring in a monolayer. The maximum adsorption capacity of the steel slag to phenanthrene and naphthalene is 0.043 and 0.041 mg/g, respectively. A pseudo-first-order kinetic model can better represent the adsorption of phenanthrene and naphthalene by steel slag. The research demonstrates that the steel slag has a certain adsorption capacity for phenanthrene and naphthalene.
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
Nanomaterials
·
2019
·Vol. 9
·期 3
·455
·
IF 4.034
Yuhao Zhao,Kai Xia,Zhenzong Zhang,Ziming Zhu,Yongfu Guo,Zan Qu
In order to avoid using toxic or harmful operational conditions, shorten synthesis time, enhance adsorption capacity, and reduce operational cost, a novel magnetic nano-adsorbent of CoFe2O4@SiO2with core–shell structure was successfully functionalized with polypyrrole (Ppy). The physical and chemical properties of CoFe2O4@SiO2-Ppy are examined by various means. The as-prepared CoFe2O4@SiO2-Ppy nanomaterial was used to adsorb Hg2+from water. During the process, some key effect factors were studied. The adsorption process of Hg2+onto CoFe2O4@SiO2-Ppy was consistent with the pseudo-second-order kinetic and Langmuir models. The Langmuir capacity reached 680.2 mg/g, exceeding those of many adsorbents. The as-prepared material had excellent regeneration ability, dispersibility, and stability. The fitting of kinetics, isotherms, and thermodynamics indicated the removal was endothermic and spontaneous, and involved some chemical reactions. The application evaluation of electroplating wastewater also shows that CoFe2O4@SiO2-Ppy is an excellent adsorbent for Hg2+ions from water.Keywords:adsorbent;polypyrrole;heavy metal;mercury;modification
研究领域:
环境科学
·
材料科学
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产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Chi Ma,Chenyu Qi,Dingbo Wei,Zhenzhen Jiang,Yafei Guo,Nelson Belzile,Tianlong Deng
The efficient and renewable recovery of cesium and strontium by absorption from a new type of geothermal water liquid mineral resource is highly desirable but still challenging. In this work, a new Zr-doped layered potassium thiostannate adsorbent (KZrTS) was first synthesized and used for Cs+ and Sr2+ green and efficient adsorption. It was found that KZrTS had very fast adsorption kinetics toward both Cs+ and Sr2+ with an equilibrium reached within 1 min, and the theoretical maximum adsorption capacities for Cs+ and Sr2+ were 402.84 and 84.88 mg/g, respectively. Moreover, to solve the loss problem of the engineering application of the powdered adsorbent KZrTS, KZrTS was uniformly coated with polysulfone by wet spinning technology to form micrometer-level filament-like absorbents (Fiber-KZrTS), whose adsorption equilibrium rates and capacities toward Cs+ and Sr2+ are almost the same as that of powder. Furthermore, Fiber-KZrTS showed excellent reusability, and the adsorption performance remained virtually unchanged after 20 cycles. Therefore, Fiber-KZrTS has potential application for green and efficient cesium and strontium recovery from geothermal water.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHINESE JOURNAL OF CHEMICAL ENGINEERING
·
2025
·
IF 3.7
Biao Yuan,Fujin Sun,Pingting Chen,Kunpeng He,Pan Wu,Changjun Liu,Jian He,Wei Jiang
With the development of vanadium redox flow battery technology, the demand for pure vanadium is rapidly increasing. The separation of vanadium from vanadium–chromium leaching solutions are critical step in the production of purity-vanadium. This study presents an innovative adsorption process that utilizes amorphous ZrO 2 (AZrO) for the selective separation of V(V) and Cr(VI). In this process, a high adsorption capacity for V(V) at 64.5 mg·g –1 was achieved, while the capacity for Cr(VI) is relatively low at 24.1 mg·g –1 , demonstrating good separation performance. This is mainly caused by the large specific surface area and mesoporous structure, which are favorable for molecular diffusion and mass transfer. The kinetic analysis shows that the adsorption process follows pseudo-second-order kinetic process with chemisorption being the rate-controlling process. AZrO showed excellent separation performance in mixed solutions over a wide range of concentrations. After five cycles, AZrO retained over 73% of its capacity, indicating good stability. In mixed solutions containing up to 40 g·L –1 of V(V) and 3 g·L –1 of Cr(VI), the innovative adsorption process successfully achieved effective separation and purification. By an adsorption–desorption process using 0.1 mol·L –1 NaOH, a 99.02% V(V)-rich solution was obtained from a high concentration sodium vanadium slag leaching solution, demonstrating its effectiveness for practical industrial 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
Royal Society Open Science
·
2020
·Vol. 7
·期 3
·
IF 2.646
Yazhen Wang,Shuang Li,Liqun Ma,Shaobo Dong,Li Liu
Corn stalk was used as the initial material to prepare a corn stalk matrix-g-polyacrylonitrile-based adsorbent. At first, the corn stalk was treated with potassium hydroxide and nitric acid to obtain the corn stalk-based cellulose (CS), and then the CS was modified by 2-bromoisobutyrylbromide (2-BiBBr) to prepare a macroinitiator. After that, polyacrylonitrile (PAN) was grafted onto the macroinitiator by single-electron transfer living radical polymerization (SET-LRP). A novel adsorbent AO CS-g-PAN was, therefore, obtained by introducing amidoxime groups onto the CS-g-PAN with hydroxylamine hydrochloride (NH2OH · HCl). FTIR, SEM and XPS were applied to characterize the structure of AO CS-g-PAN. The adsorbent was then employed to remove Pb(II) and Cu(II), and it exhibited a predominant adsorption performance on Pb(II) and Cu(II). The effect of parameters, such as temperature, adsorption time, pH and the initial concentration of metal ions on adsorption capacity, were examined in detail during its application. Results suggest that the maximum adsorption capacity of Pb(II) and Cu(II) was 231.84 mg g–1 and 94.72 mg g−1, and the corresponding removal efficiency was 72.03% and 63%, respectively. The pseudo-second order model was more suitable to depict the adsorption process. And the adsorption isotherm of Cu(II) accorded with the Langmuir model, while the Pb(II) conformed better to the Freundlich isotherm model.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）