INORGANICA CHIMICA ACTA
·
2022
·
IF 3.118
Zong-Ying Li,Hong-Xia Zhang,Tian-Sheng He,Hong-Xin Jiang,Xiao-Wei Liu,Li-Na Zhu,Xiao-Zeng Li,De-Ming Kong
A two-dimensional (2D) water-stable Cd (II) luminescent coordination polymer ( 1 ), namely {[CdLCl 2 ]} n , was obtained through assembly of a new 2-deoxy- d -ribose derivative ligand (L) with CdCl 2 , 1 showed high stability in water. Further investigation showed that 1 can be used as luminescent probe for the organoarsenic compound Roxarsine (ROX) with high selectivity and sensitivity, high quenching constants (K SV = 2.34 × 10 4 M −1 ), low limits of detection (LOD) (0.16 μM) and good recyclability in aqueous media. In addition, this luminescent probe can detect some inorganic harmful ions (Fe 3+ , Cr 2 O 7 2− and CrO 4 2− ) with excellent versatility. The detection mechanism was proved that the quenching was caused by competitive absorption and resonance energy transfer effect between 1 and analytes. More strikingly, a simple 1 -based test strip was developed owing to the quick response and recyclability of 1 , which shows visible quenching signals under UV light even when analytes concentrations are as low as 5 μM. This work has provided an effective method for the design of multifunctional CP luminescent sensors for pollutants detections in aqueous media.
研究领域:
化学
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环境科学
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分析化学
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DOI
高影响因子
Journal of Inorganic and Organometallic Polymers and Materials
·
2025
·
IF 4.9
Liu Deyan,Zhu Manying,Zhang Nanhai,Song Qinghe,He Guangjun,Wang Shixing,Zhang Libo
It is of urgent significance to develop highly stable and efficient CrO 4 2− detection technology in the fields of drinking water distribution and sewage treatment. A highly stable europium metal-organic framework (Eu-MOF) was designed as fluorescent probe for the efficient detection of trace CrO 4 2− in water solutions. This was achieved through the self-assembly of the lanthanide Eu 3+ and a rigid conjugated organic ligand [2,2’- biquinoline]-4,4’-dicarboxylic acid (H 2 L) under hydrothermal conditions. The obtained Eu-MOF exhibits excellent water stability, thermal stability and photostability. The Eu-MOF can quantitatively detect trace amounts of CrO 4 2− through fluorescence quenching effect. Its detection sensitivity is 4.48 × 10 4 M − 1 , with a detection limit as low as 0.06 µM (9.7 µg/L). This is one of the lowest values for the detection limit of CrO 4 2− in aqueous solution and is far below the allowable level for drinking water specified by World Health Organization. The Eu-MOF sensor also demonstrates excellent selectivity, anti-interference ability, repeatability (after 4 cycles), reproducibility and practical feasibility. Furthermore, the fluorescent luminescence and senseing mechanism were studied in detail. The fluorescence senseing mechanism of the Eu-MOF for CrO 4 2− detection involves the competitive absorption of excitation energy. The fluorescence-based sensing technology using the Eu-MOF provides a reference for environmental pollution detection and holds potential practical value.
研究领域:
环境科学
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材料科学
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分析化学
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产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2025
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IF 11.3
Xiangshan Hou,Jiayao Zhu,Jingwei Li,Yanhui Liu,Xujiang Wang,Wen Jiang,Wenlong Wang
Safe disposal of nuclear waste is an inevitable requirement for the rapid development of nuclear power. Sulfoaluminate cement (SAC) exhibits excellent performance and potential application in nuclear waste solidification. In this study, a temperature-variable leaching test (90 °C and 25 °C) and an ettringite crystal synthesis experiment were designed to analyze the influence of elevated temperature on SeO 4 2- and CrO 4 2- in SAC matrices. The results showed that, on the one hand, high temperature promoted the oxyanions leaching; on the other hand, it accelerated the early hydration of SAC and subsequently hindered further leaching. The decomposition of ettringite at high temperatures weakened both the physical and chemical solidification mechanisms. Changing from 90 °C condition to 25 °C condition could cause a small amount of ettringite to reform within pores, which significantly inhibited oxyanions leaching. No obvious competitive or induced effects between SeO 4 2- and CrO 4 2- were observed. In SAC matrices, the distributions of Se and S were integrated, whereas Cr tended to be enriched alone. SeO 4 2- tended to mix with SO 4 2- and participate in the formation of ettringite together, and CrO 4 2- tended to precipitate alone to form CrO 4 -ettringite. This paper presents new insights into the solidification and migration behavior of oxyanions when the solidification matrix undergoes phase transformations.
研究领域:
环境科学
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核废料处理
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材料科学
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产品关联
DOI
PubMed
高影响因子
CRYSTENGCOMM
·
2021
·Vol. 24
·期 7
·1358-1367
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IF 3.545
Yin-Xia Sun,Geng Guo,Wen-Min Ding,Wen-Yu Han,Juan Li,Zhe-Peng Deng
Heavy metal ions are common pollutants in water pollution. Amino acids, as important substances in organisms, participate in many life activities. The detection of heavy metal ions and amino acids with high selectivity and sensitivity is important. Therefore, based on H3L (H3L = 4,4′,4′′-triazine-2,4,6-tribenzoic acid) and Eu3+, an Eu-MOF was designed, synthesized and characterized. Single crystal structure analysis showed that the Eu-MOF was crystallized in the orthorhombic space group Fddd, and presents a three-dimensional (3D) porous network structure. The luminescence results show that the Eu-MOF has good luminescence stability. As a multifunctional luminescent sensor, the Eu-MOF can detect Fe3+, Cr2O72−, CrO42− and aspartic acid (Asp) in water systems with high sensitivity and selectivity, and the lowest detection limit (LOD) was 1.12 × 10−6 mol L−1, 1.95 × 10−6 mol L−1, 1.89 × 10−6 mol L−1 and 2.20 × 10−6 mol L−1, respectively. These results indicated that the Eu-MOF has potential application prospects in the detection of Fe3+, Cr2O72−, CrO42− and Asp in water.
研究领域:
化学
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环境科学
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材料科学
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DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2019
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IF 2.931
Kui Chen,Weixia Qing,Weiping Hu,Minghua Lu,Yong Wang,Xiuhua Liu
In this work, we reported an economical plant-based hydrothermal method for one-pot green synthesis of water-soluble carbon dots (Tea-CDs) by using waste tea extract as a carbon source. The synthesized Tea-CDs were characterized by UV–visible, fluorescence, FT-IR, TEM, XPS and XRD. The Tea-CDs were found to remove hydroxyl and superoxide anion radical in vitro. In addition, the Tea-CDs exhibited bright blue fluorescence under UV-light (λ ex = 365 nm), and the fluorescence could be effectively quenched by CrO 4 2− and Fe 3+ ions. Meanwhile, the fluorescence of Tea-CDs-CrO 4 2− and Tea-CDs-Fe 3+ systems could be again easily recovered by ascorbic acid (AA) and L-cysteine (L-Cys). As an on-off-on fluorescent nano-sensor of the Tea-CDs, the sensitive detection of CrO 4 2− , Fe 3+ , AA and L-Cys were all performed, showing that the good linear relationships between fluorescence intensity of Tea-CDs and concentration of all testing samples. Finally, the sensors successfully detected CrO 4 2− , Fe 3+ , AA and L-Cys in commercially available real samples with satisfactory recovery ranges. The prepared sensors offer distinct advantages including low cost, simple handling, good sensitivity and high selectivity.
研究领域:
材料科学
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环境科学
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分析化学
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产品关联
DOI
PubMed
高影响因子
MATERIALS RESEARCH BULLETIN
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2019
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IF 3.355
Xiao Jiang,Qing-Da An,Zuo-Yi Xiao,Shang-Ru Zhai,Zhan Shi
Versatile adsorptive materials that can efficiently capture anionic and cationic heavy metals are extremely significant in purification of complex wastewater systems. Herein, a new type of amine modified, biopolymer-derived core/shell-like adsorbents were employed in heavy metal anion and cation adsorption. The maximum adsorption capacities for Cr(VI), Pb(II), and Cu(II) were measured to be 497.1, 535.6, and 163.7 mg/g, respectively. The adsorbent also showed great performance in heavy metal cation adsorption in fixed bed column experiments. Additionally, removal efficiency and rapid adsorption kinetics on low concentration heavy metal pollutions for both anion and cations were well discussed to demonstrate the potential in real accidental heavy metal pollution. The prepared core/shell-like biopolymer adsorbents were demonstrated to be a kind of versatile adsorbent for both anionic and cationic heavy metal ions in aqueous solutions.
研究领域:
环境科学
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材料科学
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水处理
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DOI
高影响因子
CHEMICAL GEOLOGY
·
2017
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IF 3.347
Yingying Xie,Guining Lu,Han Ye,Chengfang Yang,Di Xia,Xiaoyun Yi,John Reinfelder,Zhi Dang
The cycling of Fe and Cr is intimately linked to the fate of schwertmannite in acid mine drainage (AMD) and acid sulfate soil (ASS) environments. Dissolved organic matter (DOM) can affect the stability of minerals and speciation, mobility and toxicity of heavy metals via redox reactions and complexation. However, knowledge about the fate of Fe and Cr upon reduction and complexation of CrO 4 2 − -substituted schwertmannite by fulvic acid (FA) is poorly understood. In this study, experiments were devised to investigate the interaction between FA and schwertmannite, with major degeneration of the schwertmannite structure as well as the formation of secondary minerals. For CrO 4 2 − -substituted schwertmannite, results indicated that the concentrations of total Fe and Cr in the solution were determined to be the maximum values at 360 h and 96 h, and then decreasing over the reaction time when FA was 10 mg/L at pH of 6.5. The characterization on the solid phase by X-ray diffraction, scanning electron microscopy and X-ray photo electron spectroscopy technologies revealed that goethite was the dominant newly secondary mineral phases which played a vital role in controlling the fate and transport of Fe and Cr. The possible mechanism was proposed to be synergistic effect including ligand-promoted and reduction. This study provides new insights into the understanding of trace element behavior in environments affected by DOM and also has guiding significance for Cr-contaminant remediation.
研究领域:
环境科学
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土壤学
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产品关联
DOI
高影响因子
ACS Applied Nano Materials
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2019
·
IF 0
Xia Jin,Guang-Qing Wang,Ding Ma,Shu-Qi Deng,Song-Liang Cai,Jun Fan,Wei-Guang Zhang,Sheng-Run Zheng
Oxo-anion pollutants pose a serious threat to natural water systems. It is highly necessary to develop cationic porous materials capable of removing oxo-anion from sewage. However, they are relatively rarely reported compared with anionic and neutral materials. Herein, two cationic amorphous metal–organic cage-based solids containing cages of different sizes, namely, aMOC-1 and aMOC-2, were constructed and use for removing oxo-anions from water. Because the cages in these materials have large cavities (with about 3.5 and 4.5 nm in diameter for aMOC-1 and aMOC-2, respectively) and high positive charges (positive +24 for both), both aMOC-1 and aMOC-2 exhibit rapid kinetics in carcinogenic chromate (CrO42– and Cr2O72–) and ReO4– (a surrogate anion of radioactive isotope TcO4–) adsorption. The adsorption equilibrium can be reached within only a few minutes. The adsorption capacities of aMOC-1 for CrO42–, Cr2O72–, and ReO4– are 157.4, 203.8, and 350 mg/g, respectively. Because aMOC-2 contains larger metal–organic cage, the corresponding adsorption capacities are 242.0, 407.0, and 583.9 mg/g, respectively. The capacity of aMOC-2 for Cr(VI) oxo-anion adsorption ranks the highest among all related materials ever reported. In addition, the oxo-anions can be released rapidly within several minutes from the oxo-anion-loaded aMOCs in 2 M NaNO3 solution, which allows these materials to exhibit good reusability. Finally, the aMOCs have a potential application in the removal of Cr(VI) from electroplating bath wastewater, in which the concentration changes from 10 to 0.17 ppm after treatment with aMOCs.
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
MICROCHEMICAL JOURNAL
·
2026
·
IF 5.1
Shuo Wang,Pei Xiong,Hualan Xu,Shengqian Wang,Yuner Lin,Yiqian Cheng,Xuechun Wu,Huajiang Yu,Shengliang Zhong
The selective recognition of trace amounts of CrO₄ 2− and S₂O₄ 2− individually in aqueous solutions using a single metal-organic framework (MOF) platform has been scarcely explored. In this study, a ligand, 3,7-di(4-pyridyl) phenothiazine, was synthesized and employed to develop a zinc-based MOF (Zn-PTZpy) through a solvothermal process. The resulting Zn-PTZpy material exhibited strong luminescent characteristics. Acting as a dual fluorescent sensor for CrO₄ 2− and S₂O₄ 2− , Zn-PTZpy showed remarkable chemical stability and enabled highly selective detection of chromate ions (CrO₄ 2− ) through a fluorescence quenching process, exhibiting a high Stern-Volmer quenching constant ( K sv ) of 3.56 × 10 4 M −1 . In addition, when Zn-PTZpy interacted with dithionite (S₂O₄ 2− ) in aqueous solution, a pronounced fluorescence enhancement was observed, with an amplification constant ( K sv ) of 6.69 × 10 3 M −1 . The framework exhibited strong resistance to interference from other ions and achieved low detection limits of 0.09 μM for CrO₄ 2− and 0.12 μM for S₂O₄ 2− . Moreover, Zn-PTZpy demonstrated a rapid response, with detection times of 10 s for CrO₄ 2− and 3 min for S₂O₄ 2− . The Zn-PTZpy material exhibited remarkable effectiveness in real environmental and sample analyses, confirming its strong potential for practical applications. In addition, the Zn-PTZpy sensor achieved satisfactory recovery rates ranging from 93% to 111% when tested with spiked lake water samples. For the first time, this study presents the dual functional potential of Zn-PTZpy for applications in environmental monitoring.
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DOI
高影响因子
CEMENT & CONCRETE COMPOSITES
·
2025
·
IF 13.1
Binglin Guo,Di Lu,Ping Ye,Kaixuan Wang,Yuxing Gao,Huyong Qin,Yang Liu,Tongsheng Zhang,Lei Wang,Chuanzhen Wang,Binggen Zhan,Qijun Yu
Cement-based solidification/stabilization (S/S) is widely used for the treatment of hazardous waste because it is a low-cost and straightforward process. However, the immobilization efficiency of traditional cement systems for amphoteric and anionic heavy metals is insufficient. Therefore, improving the immobilization ability of cement-based materials for amphoteric and anionic heavy metal pollutants is the key focus of current research. Herein, we innovatively increased the adsorption capacity of anions using quaternary ammonium group-functionalized modified biochar and systematically investigated the adsorption mechanism of modified biochar for Pb 2+ and CrO 4 2− under the alkaline conditions. Modified biochar was further incorporated into the cement matrix to evaluate its immobilization efficiency for Pb 2+ and CrO 4 2− and its effect on the properties of cement-based materials. Results showed that the substitution of quaternized biochar reduced the leaching concentrations of Pb 2+ and CrO 4 2− due to the positive charge of quaternized biochar under strong alkaline conditions, which reduced the electrostatic repulsion between anions and facilitated the adsorption of more heavy metal ions. Furthermore, due to the microfilling, internal curing, and hydration nucleation effects of biochar, biochar substitution improved the compressive strength of cement and the formation of hydration products. This study proposes a new strategy for preparing biochar–cement composite immobilization materials to address the bottleneck in cement-based S/S technology.
研究领域:
环境工程
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材料科学
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土木工程
·
重金属修复
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产品关联
DOI
高影响因子
BIORESOURCE TECHNOLOGY
·
2020
·
IF 7.539
Huabin Wang,Siqi Wang,Zhulei Chen,Xinquan Zhou,Jia Wang,Zhuqi Chen
Cationic and anionic heavy metal contaminants generally co-exist in practical industrial effluent, and simultaneously removal of these species is a bottleneck for most of the bio-adsorbents because of their contrary charge. In this work, pinewood sawdust derived engineered biochar (BC) was fabricated with MgAl layered double hydroxide (MgAl-LDH) nanosheets, which could efficiently and simultaneously capture heavy metal cations and oxyanions from wastewater. The synergetic effect between loaded MgAl-LDH and BC substantially improves its adsorption performance towards both cationic and anionic contaminants, i.e., Pb 2+ and CrO 4 2− . The adsorption capacity of MgAl-LDH/BC for Pb 2+ reached 591.2 mg/g, which is 263% higher than that of BC, and in the case of CrO 4 2− , the adsorption capacity is 330.8 mg/g, 416% higher than that of BC. The elimination of Pb 2+ was mainly attributed to forming complexations with surface functional groups. While for oxyanions removal, CrO 4 2− can be reduced to Cr 3+ by functional groups, and then generated Cr 3+ could replace Al 3+ via morphic substitution, consequently formed an MgCr-LDH structure. Further, in the continuous fixed-bed column study, 225 bed volume of simulating electroplating wastewater co-existed with Pb 2+ and CrO 4 2− can be efficiently treated. Hence, this study sheds light on the engineered biochar design to efficiently and simultaneously capture heavy metal cations and oxyanions and its feasibility on real wastewater purification.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
CRYSTENGCOMM
·
2024
·Vol. 26
·期 24
·3167-3175
·
IF 2.6
Meifang Liu,Yue Jiang,Huimin Du,Ziwei Zou,Mengtan Ye,Jingyu Chen,Hanying Ren,Jun Yang,Shanshan Hu
Chromium is a common heavy metal element that is harmful to the ecosystem as well as human health, so sensitive detection of chromium ions in solution is important for life and health. In this paper, a series of Eu3+-doped KBi3F10 fluorescent powders were successfully synthesized by a one-step solvothermal method for the selective detection of Cr3+, CrO42− and Cr2O72− ions in an aqueous solution. When adjusting the pH value to 3 and adding PVP as an additive, the obtained KBi3F10:12%Eu3+ phosphor showed excellent red luminescence. Due to the competitive absorption and the inner filter effect of Cr3+, CrO42− and Cr2O72− ions, the red emission from Eu3+ ions produces fluorescence quenching, which can be used to detect them with good selectivity. And the detection limits are as low as 0.19 μM, 0.38 μM and 0.094 μM for Cr3+, CrO42− and Cr2O72− ions, respectively. Other metal ions and common anions showed little interference with chromium ion detection. The obtained fluorescent probe has good recyclability, accurate and reliable detection results, simple operation and low cost and is easy to promote, which make it an excellent three-in-one probe for chromium detection.
研究领域:
材料科学
·
环境科学
·
分析化学
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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）