SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Xiaonuo Xu,Yueli Wen,Yuxuan Zhao,Bin Wang,Maohong Fan,Zhiju Chen,Shiyun Guo,Wei Huang
As the primary byproduct of paper making industry, alkali lignin can lead to biological anoxia and disrupt aquatic ecosystems. Application of it in wastewater treatment can not only realize its high value utilization, but realizing reduction of carbon emission. In this study, a renewable alkali lignin-modified MOFs adsorbent AL@PCN-250 was prepared by in-situ synthesis strategy and was used to adsorb and remove Methylene blue (MB) and Rhodamine B (RhB) from textile wastewater. The effects of adsorbent dosage, pH, contact time, and initial concentration on the adsorption behavior of RhB and MB by AL@PCN-250 were investigated to evaluate its adsorption capacity and reusability. The results showed that the maximum adsorption capacities of AL@PCN-250 for RhB and MB were 299.292 mg g −1 and 209.260 mg g −1 , respectively. The Sips models fitted the adsorption isotherms well, indicating that the adsorption sites on the surface of AL@PCN-250 are heterogeneous, with varying affinities for the adsorbates. Notably, after six cycles, the removal efficiency of AL@PCN-250 for the two dyes remained above 80 %. Experimental and theoretical calculations revealed that adsorption mainly involved hydrogen bonding, Van der Waals’ force, π-π interactions, and electrostatic interactions. This study provides new insights into the high-value utilization of lignin and the synthesis of efficient adsorbents.
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
CHEMICAL ENGINEERING SCIENCE
·
2025
·
IF 4.3
Shuang E,Zhao Gao,Xinran Cong,Chuang He,Lidan Gao,Zhenxing Yin
Nitrogen-doped carbon dots (NCDs) serve as promising green corrosion inhibitors for carbon steel in acidic environments. However, the influence of nitrogen doping levels on their inhibition performance remains unclear. This study synthesizes five NCDs with varying nitrogen contents (8.34 %, 10.98 %, 13.04 %, 18.52 %, and 19.64 %) through a controlled method and confirms their long-term colloidal stability. Corrosion inhibition efficiencies are evaluated in 1 mol/L HCl using electrochemical measurements. More importantly, the inhibition mechanism is elucidated from both molecular-level calculations and microscopic characterization. The results show a non-monotonic relationship between nitrogen content and inhibition efficiency, with NCDs-4 (18.52 % N) exhibiting the highest performance, reaching 95.27 % efficiency at 100 mg/L. Adsorption isotherm analysis, surface morphology characterization, and quantum chemical calculations reveal the inhibition mechanism. The superior performance of NCDs-4 is attributed to its balanced electron-donating ability and favorable molecular geometry, which promote strong parallel adsorption on the steel surface. This work clarifies the role of nitrogen content in modulating NCD performance and provides guidance for their rational design as corrosion inhibitors.
研究领域:
材料科学
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腐蚀与防护
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绿色化学
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表面工程
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产品关联
DOI
高影响因子
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
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2025
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IF 6.2
Guodong Hong,Zhenqiang Yu,Dexin Kong,Taoli Huhe,Rui Shan,Haoran Yuan,Yong Chen
Currently, the selection of iron valence states in composite-modified magnetic biochar prepared by co-pyrolysis exhibits a high degree of blindness. Therefore, this study compares the performance of biochar preparation via co-pyrolysis of three different iron valences (Fe 2 + , Fe 3+ , and Fe 6+ ) and potassium oxalate (K 2 C 2 O 4 ) composite modification for tetracycline (TC) removal. The results indicate that the co-activation of potassium oxalate with different iron valences led to the formation of magnetic biochar with varying elemental contents, morphologies, and structures. Batch adsorption experiments demonstrate that KF3-BC has a high tetracycline removal rate over a wide pH range (3 – 11) and at high coexisting ion concentrations (1 – 100 mmol/L). Furthermore, experiments with synthetic swine wastewater in different matrices, the adsorption capacity of KF3-BC for TC (at a concentration of 100 mg/L) exceeds 81.09 mg/g. Additionally, under optimal conditions of 30 °C and pH = 5, the theoretical maximum adsorption capacity (Q max ) for TC is as follows: KF3-BC (236.91 mg/g) > KF6-BC (169.42 mg/g) > KF2-BC (51.34 mg/g) > BC (38.41 mg/g). The adsorption processes of KF2-BC, KF3-BC, and KF6-BC all conform to the Pseudo-second-order and Freundlich models, implying that TC adsorption occurs at the multilayer molecular adsorption on heterogeneous surfaces, primarily driven by chemisorption. The primary adsorption mechanism between KF-BCs and TC molecules is the π–π EDA interactions. Additionally, hydrogen bonding, cation–π complexation, electrostatic interactions, and pore filling also contribute to the adsorption process. This study can assist in selecting the optimal iron source and chemical activator for composite modification of biochar for the adsorption of TC in 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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产品关联
DOI
高影响因子
Environmental Science-Nano
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2017
·Vol. 4
·期 11
·2134-2143
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IF 6.047
Chen Tian,Jian Zhao,Jing Zhang,Shengqi Chu,Zhi Dang,Zhang Lin,Baoshan Xing
Roxarsone (ROX) is an emerging arsenic pollutant due to its potential degradation into highly toxic inorganic arsenic species in the environment. Adsorbents which can capture ROX with both high capacity and affinity are urgently needed. Herein, a nanocomposite of nano-Fe3O4 and three-dimensional graphene (Fe3O4@RGO) was designed, aiming to simultaneously attract arsenate and benzene groups in ROX. Characterization of the nanocomposite revealed that Fe3O4 nanoparticles (20–50 nm) with exposed (400) planes were highly dispersed on the graphene support. Adsorption experiments showed that Fe3O4@RGO had higher adsorption capacity, affinity, and adsorption rate towards ROX than pristine materials and efficiently removed ROX from both simulated natural and waste waters. The adsorption mechanism was confirmed as a synergetic interaction of As–Fe coordination, hydrogen bonding and π–π interaction. X-ray photoelectron spectroscopy (XPS) and extended X-ray absorption fine structure (EXAFS) results suggested that the As–Fe complexes and hydrogen bonds between Fe3O4@RGO and ROX were stronger than those in pristine nano-Fe3O4, due to the greater number of surface hydroxyls and shorter As–Fe atomic distance in Fe3O4@RGO. The π–π interaction between ROX and the graphene part in Fe3O4@RGO was also enhanced. This study provided a novel idea for designing materials to remove pollutants with both inorganic and organic moieties, such as phenylarsonic acid compounds, from water.
研究领域:
环境科学
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材料化学
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水污染控制
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纳米技术
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分析化学
✓ 已验证
DOI
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
Zhiyuan Liang,Jun Fan,Yue Sun,Yan Liu,Weisheng Zheng
Fluoride contamination from industrial discharge poses severe threats to environmental and human health. This urges a requirement for development of adsorbents with higher efficiency and better selectivity. In this study, lanthanum (La) hydroxide was in-situ deposited onto a magnetic polyacrylic anionic resin (NDMP) to synthesize a novel nanocomposite adsorbent (La-NDMP). La-NDMP exhibited maximum fluoride adsorption capacity at pH 3.0, with negligible La leaching at higher pH levels. The adsorption process followed pseudo-first-order kinetics, and the equilibrium data were well described by the Langmuir isotherm model. Importantly, the incorporation of La enhanced fluoride selectivity by resisting interference from competing anions. The adsorption mechanism involves electrostatic interactions between quaternary ammonium groups on the magnetic resin and fluoride ions, as well as the formation of inner-sphere La-F complexes. Experiments using actual wastewater confirmed that La-NDMP exhibited facile solid-liquid separation, high adsorption efficiency, and stable performance, highlighting its potential for industrial applications.
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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DOI
高影响因子
MINERALS ENGINEERING
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2025
·
IF 5
Jiaozhong Cai,Shuiping Zhong,Jiushuai Deng,Bozeng Wu,Chengyan Xu,Xiaopeng Chi,Guangsheng Zeng,Wei Weng,Wen Tan,Junnan Chen
Talc is a layered silicate mineral with pronounced crystal anisotropy, consisting of a basal (001) surface and an edge (100) surface, which complicates its separation from valuable minerals. In this study, tannic acid (TA) was used as a depressant, and its adsorption behaviors on the two representative surfaces of talc—silica (basal plane surface) and magnesium silicate (edge surface)—were systematically investigated using experimental methods and molecular simulations. TA addition reduced the contact angles of the talc basal and edge surfaces by 30.5° and 22.7°, respectively, indicating enhanced hydrophilicity. ToF-SIMS analysis revealed that TA physically adsorbs onto the silica surface, while both physical and chemical interactions occur on the magnesium silicate surface. AFM showed lumpy adsorbate on the silica surface and point-like adsorbate on the magnesium silicate surface, with a greater roughness change observed for the former. QCM-D measurements confirmed that TA formed a multilayer flexible adsorbate on the silica surface and a dense, rigid monolayer on the magnesium silicate surface. Molecular dynamics simulations further revealed that van der Waals interactions dominated TA adsorption on the (001) surface, while electrostatic interactions prevailed on the (100) surface. These findings provide insight into the selective depression mechanism of talc and offer guidance for the depression of other layered silicate minerals.
研究领域:
矿物加工
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表面化学
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分子模拟
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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
Shuwen Peng,Yuran Li,Bin Wang,Yanbin Cui,Jinglei Tian,Hongqiang Liu,Tingyu Zhu
Removal of sulfur species from blast furnace gas is urgently needed due to the strict emission limits imposed on iron-steel industrial flue gas. Improving the sulfur capacity of H 2 S is a crucial challenge to reduce the operation cost. NiFe layered double hydroxide (LDH) adsorbents were synthesized using the hydrothermal method to strengthen the adsorption of H 2 S, achieving a high sulfur capacity of 133.6 mg/g at 50 °C. Characterization studies have revealed that the reaction pathway of H 2 S on the NiFe LDH surface involves adsorption, dissociation and oxidation. It has been clarified that the high sulfur capacity can be attributed to the abundant H 2 S dissociation sites and the excellent O 2 activation sites. The dissociation sites of H 2 S encompass metal sites, -OH and CO 3 2- . The interaction between O 2 and the bridge site of asymmetric metal atoms significantly enhances the dissociation of O 2 . Strengthening the dissociation of H 2 S and O 2 improves the sulfur capacity. The deactivation of adsorbents comes from the continuous consumption of oxygen species mainly composed of -OH and the deposition of sulfur species in the smaller mesopores ranging from 2 to 10 nm. This work provides useful insights into designing highly efficient iron-based adsorbents for the desulfurization of blast furnace gas.
研究领域:
材料科学
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环境工程
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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
Zhihui Cheng,Chengwang Wang,Dongyuan Miao,Hua Ni,Yaoguo Huang,Ming Wang,Linlin Chen,Yali Zhang
Malachite is considered to be the most desirable copper-bearing mineral to develop in response to the increased costs of mining copper sulfide ores such as chalcopyrite. The surface of malachite readily forms a water film, resulting in poor floatability. Additionally, its association with calcite and quartz makes achieving selective flotation challenging. Therefore, the design and optimization of collector structure play a crucial role in effectively floating malachite. In this article, a double coordination structure amino-triazole-thione collector, 3-isobutylxanthic acid methyl ester-4-amino-1,2,4-triazole-5-thione (MiBuXATT), was first synthesized and used in malachite flotation separation from calcite and quartz. The flotation separation mechanism was studied by a series of surface and interface characterization analysis methods. Micro-flotation experiments, contact angle measurement, ζ-potential analysis, UV, FTIR and XPS spectra analyses show that MiBuXATT can selectively adsorb the copper active site on the surface of malachite by forming MiBuXATT-Cu(I) surface compound, and achieve selective hydrophobic enrichment. Concurrently, the theoretical calculations further substantiated that MiBuXATT exhibits enhanced adsorption on the malachite surface in its negative ion form.
研究领域:
矿物加工
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表面化学
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浮选化学
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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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2025
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IF 7.2
Mingguang Zhang,Jianping Yang,Lijian Leng,Hongxiao Zu,Wei Zheng,Jiefeng Chen,Hailin Zheng,Wenqi Qu,Zequn Yang,Hailong Li
Divalent mercury (Hg 2 + , mainly as HgCl 2 ) dominates the mercury species discharged from cement kiln flue gas , however, achieving effective control remains challenging. Herein, zinc sulfide (ZnS) was applied for HgCl 2 removal from cement kiln flue gas , showing superior adsorption performance among metal sulfides. ZnS achieved an unprecedented adsorption capacity of 426.1 mg ·g −1 at an optimal temperature of 160 °C, nearly 300 times higher than its Hg 0 adsorption capacity. The typical flue gas components (O 2 , H 2 O, NO and SO 2 ) displayed insignificant adverse effects on HgCl 2 adsorption. Such intriguing observation was ascribed to the inherent sulfur (S 2 2- and S 2- ) and newly-formed zinc chloride (ZnCl 2 ). The S 2 2- and S 2- sites facilitated the conversion of HgCl 2 into β-HgS and α-HgS, respectively. The HgCl 2 dissociation resulted in chlorination of ZnS to form ZnCl 2 which accelerated the initial HgCl 2 adsorption process . The moderate binding energy of HgCl 2 on the Zn sites of ZnCl 2 facilitated the migration of intermediate adsorption products to the S sites of ZnS to form HgS. This work not only provided a promising alternative to commercial activated carbons (ACs) for HgCl 2 removal from cement kiln flue gas, but also proposed new insights to guide the design of HgCl 2 adsorbents. Synopsis A high-efficient HgCl 2 removal strategy for cement kiln flue gas was developed, and the role of inherent sulfur and newly-formed ZnCl 2 in HgCl 2 adsorption over ZnS was proposed for the first time.
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产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2025
·
IF 9
Peng Gao,Bohao He,Yu Tian,Chi Wang,Xin Sun,Ping Ning,Kai Li,Fei Wang
Hydrogen fluoride (HF) gas is a major combustion byproduct in non-ferrous metal smelting, aluminum electrolysis, coal combustion, and waste incineration processes. Due to its high corrosivity and toxicity, which pose a serious threat to human health and environmental ecosystems, it is necessary to strictly control HF emissions from industrial processes or remove it using proper methods. In this study, an oxygen vacancy-containing magnesium-based adsorbent (2NC@Mg(NO 3 ) 2 –500) was successfully synthesized via a one-pot method. This adsorbent demonstrated a maximum HF adsorption capacity of 195.65 mg·g −1 (at 90 % efficiency), significantly exceeding values reported in previous literature. The basic sites of magnesium oxide (MgO) were critical for promoting HF dissociation, while oxygen vacancies facilitated HF adsorption and its conversion to magnesium fluoride (MgF 2 ). Density functional theory (DFT) calculations further confirmed the experimental findings, demonstrating that oxygen vacancies significantly enhance HF adsorption on MgO by stabilizing fluoride ions (F - ) at the vacancy sites. The subsequent consumption of these vacancies and the conversion of MgO to MgF 2 led to adsorbent deactivation. This study highlights the important role of oxygen vacancies in HF gas adsorption.
研究领域:
环境化学
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材料科学
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冶金工程
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大气污染控制
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表面科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2025
·
IF 1.6
Chen Yanan,Sui Wenxuan,Peng Jianbiao,He Xindi,Zhu Kairuo
In this work, through the ball-milling treatment process, the novel micron-engineered Ulva prolifera (m- Ulva ) was prepared and used to remove U(VI) from water. The m- Ulva properties were interpreted by analysis of the morphology structure, specific surface area, functional groups, and composition. The adsorption experimental results testified that the U(VI) adsorption process depends strongly on pH, while followed the pseudo-second-order kinetic model and the Langmuir adsorption isotherm model. The maximum absorption capacity was shown to be 147.06 mg/g at pH 5.0 and 25° C. Based on various characterization, the related adsorption mechanisms mainly encompassed electrostatic attraction, complexation and partial reduction of U(VI). The study presents a green, scalable method to transform Ulva prolifera into low-cost, micron-engineered biomass material for U(VI)-contaminated wastewater cleanup.
研究领域:
环境科学
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海洋生物学
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生物修复
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核化学
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材料科学
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产品关联
DOI
高影响因子
Inorganic Chemistry Frontiers
·
2019
·Vol. 6
·期 4
·1011-1021
·
IF 5.934
Junping Ma,Qiuyu Zhao,Dongli Wei,Haiqiang Liu,Xiangke Wang,Zhe Chen,Jianjun Wang
The adsorption remediation of radioactive contamination from wastewater is scientifically and economically important. In this work, titanium dioxide-modified manganese dioxide (MnO2@TiO2) was prepared by immobilizing crystalline anatase titanium dioxide (TiO2) on the surface of alpha manganese dioxide nanowire (MnO2). The base material MnO2 nanowire acted as a physical template for the guest TiO2, and the formed MnO2@TiO2 composite exhibited a highly uniform core–shell nanorod structure. The MnO2@TiO2 composite was investigated as an efficient adsorbent for the removal of U(VI) from aqueous solution. In the same system, MnO2@TiO2 exhibited a much higher maximum adsorption capacity (105.3 mg g−1) for U(VI) as compared with MnO2 (13.3 mg g−1), showing that the performance of the surface-modified MnO2 was greatly improved. The fitting results for kinetic and isothermal models manifested that U(VI) ion adsorption by MnO2@TiO2 involved monolayer chemisorption. Characterization before and after adsorption was performed and the results compared and analyzed carefully, with the conclusion that there might be three kinds of interactions between U(VI) and MnO2@TiO2 during the adsorption process, namely inner-sphere surface complexation, chemical precipitation, and electrostatic interaction. The low-cost, facile fabrication method and efficient performance endow the adsorbent MnO2@TiO2 with a high potential for U(VI) removal from actual wastewater.
研究领域:
环境科学
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材料科学
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核废物处理
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水污染控制
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DOI
高影响因子
危险品化学品经营许可证（带存储）