Journal of Environmental Chemical Engineering
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2021
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IF 5.909
Junfei Liu,Hai Lin,Yingbo Dong,Yinhai He,Wei Liu,Yuanyuan Shi
The agglomeration and limited number of marginal adsorption sites have always been the restrictive factors for nano-MoS 2 adsorption performance. In this study, modified zeolite supported nano-MoS 2 (MoS 2 @Zeolite) with multiple adsorption sites was synthesized by combining ultrasonic and hydrothermal method, and utilized for tetracycline (TC) removal. MoS 2 @Zeolite-5 exhibits the best adsorption performance with a maximum saturation adsorption capacity of 396.70 mg g −1 (35 ℃). Meantime, MoS 2 @Zeolite-5 maintains a stable adsorption performance, which only decreased by 8.17% after four regeneration experiments. The structure characteristics and adsorption mechanism of adsorbents were also systematically investigated. The contact angle, crystal structure, micro-morphology analyses prove that modified zeolite plays the roles of enhancing the hydrophilia, restricting the growth of MoS 2 along C-axis, and exposing more adsorptive sites of MoS 2 . The Pseudo-second order kinetics is suitable for the model adsorption process and the adsorption process is endothermic. The adsorption mechanism of composites mainly relied on the chelation by Mo and electrostatic interaction. Furthermore, the effect of H-bonding and π-π action also existed. This study confirms that MoS 2 @Zeolite-5 is an efficient, stable, and promising adsorbent to treat TC-pollution of pharmaceutical wastewater.
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
APPLIED CATALYSIS B-ENVIRONMENTAL
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2023
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IF 22.1
Yizhen Cheng,Jing Kang,Pengwei Yan,Jimin Shen,Zhonglin Chen,Xinwei Zhu,Qiang Tan,Linlu Shen,Shuyu Wang,Shaobin Wang
Herein, a highly dispersed catalyst (ZnO x -500) was synthesized for heterogeneous catalytic ozonation (HCO), which had a simple ZnO crystal phase but riched in oxygen vacancies (OVs). The O 3 /ZnO x -500 system exhibited both superior catalytic activity and stability after several cycles, providing a promising strategy for atrazine (ATZ) removal. The strong inhibition of phosphoric acid validated the dominant role of the hydroxyl group (−OH) from water molecule (H 2 O) dissociation on the zinc site near OVs. Density functional theory calculation further revealed that OVs on (100) and (101) planes could make more zinc sites exposed and facilitate the formation of hydrated −OH, which was easier to approach O 3 for its decomposition to generate hydroxyl radical ( • OH). This work revealed the intrinsic relationship between OVs and hydrated −OH in an aqueous solution, providing new insight into the solid-liquid interface mechanism of HCO.
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
SCIENCE OF THE TOTAL ENVIRONMENT
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2022
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IF 10.753
Jun Liao,Xiaoshan He,Yong Zhang,Wenkun Zhu,Lin Zhang,Zhibing He
In this work, Bi 2 O 3 doped horse manure-derived biochar was obtained by carbonizing the H 2 O 2 -modified horse manure loaded with bismuth nitrate under nitrogen atmosphere at 500 °C. The results showed that there was a sharp response between the as-prepared bismuth impregnated biochar and uranium(VI) species in solution, which resulted in a short equilibrium time (<80 min), a fast adsorption rate (about 5.0 mg/(g·min)), a high removal efficiency (93.9%) and a large adsorption capacity (516.5 mg/g) ( T = 298 K, pH = 4, C i = 10 mg/L and m/V = 0.1 g/L). Besides, the removal behavior of the bismuth impregnated biochar for uranium(VI) did not depend on the interfering ions and ion strength, except Al 3+ , Ca 2+ , CO 3 2− and PO 4 3− . These results indicated that the modified biochar might possess the potential of remediating the actual uranium(VI)-containing wastewater. Moreover, the interaction mechanism between Bi 2 O 3 doped biochar and uranium(VI) species was further explored. The results demonstrated that the enrichment of uranium(VI) on the surface of the as-prepared biochar was controlled by various factors, such as surface complexation, ion exchange, electrostatic attraction, precipitation and reduction, which facilitated the adsorption of uranium(VI) on the bismuth impregnated biochar.
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
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2019
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IF 3.131
Qun Jiang,Weiling Xie,Siyue Han,Yifan Wang,Ying Zhang
The corn straw-converted hydrochar (HC), HC modified with H 3 PO 4 (H 3 PO 4 -HC), and HC modified with polyethyleneimine (PEI) (PEI-HC) were prepared in this study for Pb(II) adsorption from an aqueous solution. SEM, TEM , XRD , Raman, FT-IR, BET and XPS analysis were carried out for the characterization of the as-obtained samples, and the Pb(II) adsorption capacities and mechanism onto them were analyzed. The results of SEM show that PEI loading on HC could cover the aggregates of the carbon spheres, altering the microscopic characteristic of HC. The lower I D / I G value of H 3 PO 4 -HC and no residual cellulose provided evidence to H 3 PO 4 -HC suffering a more thoroughly carbonization process than the original HC or PEI-HC. Both H 3 PO 4 -HC and PEI-HC exhibited excellent performance for Pb(II) adsorption with q max of 353.4 mg g −1 and 214.0 mg g −1 , respectively, which are significantly higher than the adsorption capacity (32.67 mg g −1 ) of the original HC. And the dominant Pb(II) adsorption process onto the as-fabricated HCs was attributed to chemical reaction revealed by the results of XPS analysis. After the adsorption process, the binding energies of C O and C O or NH / NH 2 and N in the as-prepared HCs have been shifted, confirming that the surface functional groups had taken part in the Pb(II) adsorption. The main adsorption mechanisms of Pb(II) on H 3 PO 4 -HC are the ions exchange and hydrogen bonding , and that of PEI-HC are the coordination bonding and hydrogen bonding. This study put forward in-depth views on the adsorption mechanism of the modified HCs. This facilitates the development of new and efficient adsorbents for the removal of heavy metals from water.
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
JOURNAL OF HAZARDOUS MATERIALS
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2020
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IF 9.038
Chen Wang,Yubei Liu,Mingjie Huang,Wei Xiang,Tao Zhou,Xiaohui Wu,Juan Mao
It was demonstrated in this study that appropriate concentrations of oxalate (Ox) would lead to greatly accelerated electro-generation of Fe 2+ but obviously lower power consumption in the Fered-Fenton system. Depending on the Ti electrode with pristine TiO 2 layer, effects of important parameters on the SMX degradation were investigated in the Fered-Fenton-Ox system. It was found that the heterogeneous interfacial electrochemically reduction of Fe III was critical in the Fered-Fenton-Ox system relying on the surface hydroxyl bonding Fe III -Ox and formation of Fe O Ti bonds. A heterogeneous-homogeneous reaction mechanism was therefore proposed. It included the heterogeneous interfacial electrochemical generation of Fe II -Ox and the heterogeneous-homogenous Fenton oxidation of pollutants. The promotional role of Ox would be also homogenous and heterogeneous, i.e. maintaining ferric at higher pH and forming specific Fe III -Ox complex as well as accelerating the solid-liquid interfacial heterogeneous iron cycle. Furthermore, a continuous-flow pilot study was conducted in treating a printing and dyeing industrial wastewater. As compared to conventional Fenton and Fered-Fenton systems, the Fered-Fenton-Ox system could achieve more efficient COD removal with a relative low cost/△COD, suggesting great advantages in its practical applications for treating real industrial complex wastewaters.
研究领域:
环境科学
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化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
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IF 5.4
Meng Mei,Zhicheng Luo,Zhijian Ke,Ruiyu Guo,Yiyang Zhang,Hui Zhao,Weilin Li
Biochar, as a cost-effective and sustainable material, requires surface engineering for efficient removal of emerging contaminants like ibuprofen (IBU). This study demonstrates a facile one-step strategy using a FeCl 3 /urea deep eutectic solvent (DES) as an all-in-one modifier to concurrently introduce magnetization and N-doping during pyrolysis. By optimizing the pyrolysis temperature (500–800 °C) and peanut shell biomass/DES ratio (1:3–1:5), we identified that these parameters critically governed the biochar’s properties including graphitization, nitrogen content, defect density, surface functionalities and porosity. This enabled the synthesis of an N-doped magnetic biochar (PB600 1/5 ) that achieved a high IBU adsorption capacity of 175.75 mg/g, which was attributed to its favorable pore structure, abundant oxygen-containing groups, N functionalities and accessible Fe species. The adsorption followed pseudo-second-order kinetic and the Langmuir isotherm models, driven by mechanisms including pore filling, hydrogen bonding, Fe-complexation and π-related interactions. The biochar also exhibited excellent reusability and anti-interference ability. This work elucidates the synergistic interfacial mechanisms governing IBU adsorption and highlights the FeCl 3 /urea DES as an effective strategy for designing multifunctional biochar for pharmaceutical wastewater remediation.
研究领域:
环境科学
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材料科学
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污染控制化学
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可持续技术
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吸附学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
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2025
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IF 7.2
Shuting Shen,Wenjing Li,Ting Guo,Rui Wan,Xiwu Lu,Hongliang Dai,Xiang Li
In the present study, the dynamic adsorption behavior and mechanisms of hydroxyapatite (HAP) toward Pb(II), Cd(II), and Cr(III) was systematically investigated, with a focus on the transitions of interfacial mechanisms. Kinetic analysis revealed a concentration-dependent shift from pseudo-second-order to Elovich models, indicating a transition from chemisorption to complex heterogeneous interfacial processes. The adsorption of Pb²⁺ was primarily governed by a dissolution-precipitation mechanism and lattice substitution, with ion exchange dominating at later stages. Cd²⁺ adsorption was governed by competitive dissolution-precipitation and surface reactions, exhibiting a temperature-sensitive transition from physical to chemical adsorption. Cr³ ⁺ adsorption was mainly controlled by ion exchange with limited structural disruption. Thermodynamic simulations and time-resolved solution chemistry analysis confirmed these stage-specific transitions and their dependence on metal type, concentration, and reaction time. These findings provide novel insights into the dynamic mechanism shift during heavy metal-HAP interactions, highlighting the necessity of multi-stage process understanding for optimizing heavy metal removal strategies.
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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物理化学
✓ 已验证
产品关联
DOI
高影响因子
ACS ES&T Water
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2025
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IF 4.3
Peijie Sun,Xingchen Yang,Lejin Xu
During the reprocessing of spent nuclear fuel, mixed organic solvents of tributyl phosphate (TBP) and n-decane (DD) after extraction may encounter treatment difficulties. This study synthesized nanoscale alanine-modified zerovalent iron (Ala@Fe0) as a Fenton-like catalyst. Various characterization techniques were employed to analyze the surface morphology, structure, and properties of Ala@Fe0. The results showed that alanine was successfully grafted onto Fe0, increasing the Fe(0) content and enhancing the specific surface area and surface hydrophobicity. The catalytic performance of Ala@Fe0 in degradable organic solvents was evaluated. Under the optimal reaction conditions, the oxidation efficiency could exceed 60%, and the volume reduction rate of organic solvents could exceed 95%. Electron spin resonance (ESR) analysis indicated that the active oxygen species in the Ala@Fe0–H2O2 system were mainly hydroxyl radicals (·OH). The interaction mechanism was analyzed by using density functional theory (DFT) calculations and interaction region indicator (IRI) isosurface maps. The proposed catalytic degradation mechanism indicated that Ala@Fe0 could avoid oil-phase encapsulation and undergo Fenton reactions through two possible interface mechanisms to oxidize TBP and DD. This study provides a theoretical basis for the modification of iron-based materials and their application in treating organic solvents derived from spent nuclear fuel reprocessing.
研究领域:
环境化学
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核工程
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纳米技术
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催化
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
FOOD CHEMISTRY
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2021
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IF 7.514
Junmeng Lu,Weiyi Zhang,Xue Zhao,Xinglian Xu
The emulsion abilities of pale, soft, exudative (PSE)-like chicken breast protein are unsatisfied, which are urgently needed to be ameliorated. This study evaluated the improvement of pH-shifting (11.0-, 11.5- and 12.0–7.0) on emulsion properties of the PSE-like chicken breast myofibrillar proteins (MPs) and the underlined structure-driven interfacial mechanism. It was found pH-shifting promoted the exposure of buried hydrophobic groups and free sulfhydryl groups, and changed secondary structures. Emulsions stabilized by refolded MPs exhibited more uniform and dispersed distributions with more adsorbed proteins at the interface. Electrophorogram showed both disulfide and non-disulfide covalent bonds were involved during interfacial protein–protein interaction. The results from circular dichroism and front-surface fluorescence spectroscopy revealed interfacial MPs were exposed to a more hydrophobic environment and increased β-sheets enhanced their molecular interactions. In addition, interfacial proteins after pH-shifting was less likely to be replaced by Tween 20.
研究领域:
食品科学
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蛋白质化学
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生物物理学
✓ 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）