SEPARATION AND PURIFICATION TECHNOLOGY
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2026
·
IF 9
Yan Zhao,Jun Yao,Ning Min,Bo Ma,Wenping Chai,Yvqing Ma
Acid mine drainage (AMD) originates from mineral extraction and processing operations, exhibiting high acidity and containing elevated concentrations of metals and sulphates, which frequently pose significant environmental challenges. This study combined biochar with clay minerals to prepare two magnetic biochar-montmorillonite composites (FMBC1 and FMBC2) via coprecipitation-pyrolysis and impregnation-pyrolysis methods for investigating their removal efficiency and mechanisms for Cu, Pb, and Cd from metal solutions. Adsorption results indicate that at a dosage of 1.5 g/L, both FMBC1 and FMBC2 achieve removal efficiencies exceeding 99% for Cu (100 ppm), Pb, and Cd (50 ppm). Material characterization revealed that functional group complexation, crystallization-precipitation, possible ion exchange and reduction precipitation were the mechanisms by which FMBC1 and FMBC2 interact with Cu, Pb, and Cd in solution. Furthermore, FMBC1 and FMBC2 effectively removed Cu, Pb, and Cd from synthetic wastewater and could be recovered rapidly via magnetic attraction. Following desorption with EDTA-HCl, adsorbed FMBC1 and FMBC2 can be reused. The findings of this study provide potential theoretical foundation for treating heavy metals in AMD.
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高影响因子
ACS Applied Materials & Interfaces
·
2026
·
IF 7.8
Chao Wu,Zhen Wang,Jiawu Cui,Qi Ling,Xianwei Wang,Zexun Tang,Chengyong Shu,Kang Yang,Yuping Wu,Wei Tang
Halide solid-state electrolytes (SSEs) have emerged as a compelling research focus for advanced all-solid-state lithium-ion batteries (ASSLBs), driven by their concurrent possession of exceptional oxidation stability and remarkable mechanical deformability. While Li2ZrCl6 (LZC) has attracted significant attention for its cost-effectiveness and material abundance, its practical application remains a major challenge due to lower ionic conductivity. Herein, we reported a series of Cd2+-doped lithium-rich superionic conductors Li2+2xZr1–xCdxCl6 (0 ≤ x ≤ 0.2), which collectively adopted a Li3YCl6-like trigonal structure. The incorporation of Cd2+ ions, which possess a lower charge and larger ionic radius, enhanced carrier concentration and caused anisotropic lattice expansion. Specifically, Li2.1Zr0.95Cd0.05Cl6 (LZC-5Cd) exhibited the highest ionic conductivity (9.8 × 10–4 S cm–1) at 30 °C while simultaneously broadening the electrochemical window to 4.11 V. The ASSLBs configuration featuring the LiCoO2 cathode, LZC-5Cd electrolyte, and Li–In anode demonstrated superior reversible capacity (161.4 mAh g–1 at 0.1 C) within the wide potential range of 2.5–4.3 V and remarkable cycling stability (80.69% capacity retention over 250 cycles at 2 C). In this regard, this work presented a cost-effective structural engineering strategy that simultaneously boosted ionic conductivity and broadened the working potential range to provide a potential model for the large-scale application of halide-based ASSLBs.
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PubMed
高影响因子
JOURNAL OF POLYMERS AND THE ENVIRONMENT
·
2020
·Vol. 28
·期 10
·2669-2680
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IF 2.572
Wen Lan,Zhang Yuanmeng,Liu Chengbin,Tang Yanhong
Besides excellent adsorption performance of adsorbents, the disposal of spent adsorbents should be considered for environmental concern. In this study, a new all-biomass double network Jute/sodium alginate (Jute/SA) gel is prepared via the simple dripping technique. 80 wt% water of Jute/SA hydrogel endows the adsorbent with high permeability for heavy metal ions diffusion onto internal adsorption sites. The Jute/SA gel adsorbent can efficiently remove heavy metals from melting wastewater, especially Pb 2+ and Cd 2+ . The adsorbent shows high adsorption capacities of 291.3 mg g −1 for Pb 2+ and 149.9 mg g −1 for Cd 2+ at 298 K. The adsorption equilibrium reaches within 45 min for 45 mg L −1 Cd 2+ and Pb 2+ using 1 g L −1 adsorbent, showing 98% removal efficiency of Pb 2+ and Cd 2+ . Moreover, the removal efficiencies in 45 min reach up to 99.1% for Pb 2+ (7.539 mg L −1 ) and 89.9% for Cd 2+ (4.743 mg L −1 ) in actual melting effluent containing Zn (43.95 mg L −1 ), Cu (16.50 mg L −1 ), Mn (19.24 mg L −1 ), Ni (4.90 mg L −1 ) and Fe (33.75 mg L −1 ) using 1 g L −1 adsorbent. The concentrations of Pb and Cd decrease below 0.001 mg L −1 using 4 g L −1 adsorbent. Furthermore, the adsorption efficiencies for Pb 2+ and Cd 2+ remain above 95% in the tenth cycle, and the desorption efficiency is up to 99%. In addition, the spent Jute/SA gel was a good organic fertilizer for plant growth. This work develops an efficient and eco-friendly biomass adsorbent for the removal of heavy metals in actual wastewater.
研究领域:
环境科学
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材料科学
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废水处理
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可持续化学
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高影响因子
JOURNAL OF NANOPARTICLE RESEARCH
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2017
·Vol. 19
·期 7
·1-13
·
IF 2.02
Qin Dezhi,Wang Li,Wang Yabo,Du Xian,Zhang Li,Zhang Qiuxia,He Bingyu
Protein-conjugated CdS nanocrystals (NCs) with different morphology have been synthesized under biomimetic condition using trypsin as capping agent in aqueous medium. The reaction parameters including concentration of trypsin, pH value, reaction time, and temperature have a major influence on the morphology and optical property of CdS NCs. XRD, selected area electron diffraction (SAED), TEM, HRTEM, and EDS characterizations were used to investigate the structure, composition, morphology, and size of as-prepared products. The binding reaction between Cd 2+ /CdS and trypsin was investigated systematically through various spectroscopic methods. UV-vis, FT-IR, photoluminescence (PL) spectra, and conductivity analysis of Cd 2+ -trypsin suggest that Cd 2+ ions could coordinate with the functional groups of trypsin and induce the formation of unfolding and loosening structure in protein molecules, and the change of protein conformation was also verified by circular dichroism (CD) spectra. This interaction increased local supersaturation of Cd 2+ ions around the groups of trypsin and reduced the nucleation activation energy of CdS nuclei, which favored heterogeneous nucleation in trypsin matrix and resulted in the formation of inorganic-organic hybrid materials. The functional integrity of the enzyme conjugated to CdS NCs was studied by monitoring the enzymatic activity of CdS-trypsin conjugates. The fluorescence of CdS NCs is dependent strongly on trypsin which passivates the surface of NCs.
研究领域:
生物化学
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材料科学
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光谱学
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高影响因子
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
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2016
·Vol. 78
·期 3
·632-640
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IF 1.473
Li Weiming,He Rong,Tan Lei,Xu Shiying,Kang Chengcheng,Wei Chaohai,Tang Youwen
Abstract
Combining the advantages of MCM-41 mesoporous materials and molecularly imprinted polymers, we designed and synthesized periodic Cd 2+ imprinted mesoporous silica (Cd-IMS) through a one-step hydrothermal process. Bifunctional ligand monomers [3-(γ-aminoethylamino)-propyltrimethoxysilane] and template ions (Cd 2+ ) were immobilized in the hexagonal channel walls of MCM-41, prior to polymerization. The resultant Cd-IMS revealed a highly ordered hexagonal structure, nano-sized pore diameters and wall thicknesses, and a large surface area. In addition, this material revealed good binding properties, including a large adsorption capacity (saturation adsorption capacity of 40 mg/g), highly specific recognition ability (maximum imprinting factor of 3.0), and rapid adsorption kinetics (equilibration within 5 min). Selectivity coefficients [K Cd-IMS (Cd 2+ )/K Cd-IMS (Cu 2+ or Pb 2+ )] of the Cd-IMS material demonstrated values of up to 2.29 and 3.08, respectively. Following six cycles of Cd 2+ adsorption, the recovery of Cd-IMS remained stable at around 89.3 %, proving its recycling potential. Furthermore, Cd-IMS was successfully applied to selectively separate and remove Cd 2+ from mineral wastewater samples, with high Cd 2+ recovery rates. This suggests that the routine recovery of Cd 2+ from wastewater may be realized in an economically viable manner. Graphical Abstract
研究领域:
环境科学
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材料科学
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高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2017
·
IF 4.9
Jing Lu,Shengyan Tian,Xiaohui Lv,Zuohong Chen,Baiyang Chen,Xiaoshan Zhu,Zhonghua Cai
The impact of manufactured nanoparticles on the toxicity of co-existing pollutants in aquatic environments has raised increasing concerns. However, the toxicity of polycyclic aromatic hydrocarbons or metal ions in the presence of titanium dioxide nanoparticles (nTiO 2 ) to marine zooplankton has been rarely reported. In the present study, the impacts of nTiO 2 on the toxicity of phenanthrene (Phe) and cadium (Cd 2 + ) to Artemia salina , a model marine zooplankton, were investigated. Although nTiO 2 alone exerted a limited toxicity to A. salina within 48 h of exposure, nTiO 2 strongly altered the toxicity of Phe and Cd 2 + to A. salina . Compared with the individual toxicities of pollutants to A. salina , the toxicities of Phe and Cd 2 + increased by 2.0% and 12.2%, respectively, in the presence of 5 mg/L nTiO 2, but decreased by 24.5% and 57.1%, respectively, in the presence of 400 mg/L nTiO 2 . These concentration-dependent impacts of nTiO 2 on the toxicity of Phe or Cd 2 + might be attributed to the concurrent functions of several interrelated factors including the adsorption of pollutants on nTiO 2 , the nTiO 2 -faciliated bioaccumulation of pollutants, the limited gut volume in organisms, and the aggregation and sedimentation behaviors of nTiO 2 . These results presented in the study could help understand the effects of manufactured nanomaterials in marine environments.
研究领域:
环境科学
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毒理学
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海洋生物学
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PubMed
高影响因子
Chemosensors
·
2023
·Vol. 11
·期 2
·75
·
IF 4.2
Yijing Ai,Lisi Wang,Wanting Fu,Xiang Ye,Juan Zhou,Xiaoping Zhang,Shuhai He,Wei Sun
In this paper, graphdiyne (GDY)−modified glassy carbon electrode was prepared and further used for the sensitive and simultaneous detection of three target heavy metal ions of Zn2+, Cd2+and Hg2+by codeposition with Bi3+in the mixture solution. GDY−modified electrodes exhibit a larger electrode area and abundant active sites, which is favorable for absorbing more metal ions. Bismuth has low toxicity and can form alloys with zinc, cadmium and mercury. Therefore, three kinds of heavy metal ions can be pre-concentrated with bismuth on the GDY−modified electrode surface, and the following stripping analysis results in high sensitivity and selectivity. By using differential pulse anodic stripping voltammetry, the detection ranges of Zn2+, Cd2+and Hg2+were from 2.0 to 100.0 μM with low detection limits of 0.255 μM, 0.367 μM and 0.796 μM, respectively. In addition, the sensor showed excellent repeatability, reproducibility, and stability, which was applied to sensitive analysis of river water samples with satisfactory results.Keywords:graphdiyne;bismuth;heavy metal ions;electrochemistry;differential pulse anodic stripping voltammetry
研究领域:
环境科学
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分析化学
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高影响因子
MICROCHEMICAL JOURNAL
·
2023
·
IF 4.8
Siyu Li,Weijun Shan,Ting Rao,Yanou Qi,Ying Xiong,Zhenning Lou,Haibiao Yu,Junshuo Cui,Xiaogeng Feng
Heavy metal ions (HMIs) are accumulative and toxic for the environment, causing one of the recognized social problems, while some metal ions have positive applications in the prognosis of diseases. Therefore, there is a necessity to achieve rapid, convenient, highly efficient determination of HMIs. In this work, a novel composite, CAU-17/CSG, consisting of CAU-17 and cellulose graphene (CSG) is synthesized via in situ growth method and serves as an effective electrochemical sensor. Taking advantages of the high catalytic activity of Bi in CAU-17 and the good synergy between CAU-17 and CSG , CAU-17/CSG exhibits excellent electrocatalytic activity to achieve individual and simultaneous detection of low concentrations of Zn 2+ , Cd 2+ and Pb 2+ in aqueous solutions. The limits of detection (LOD) for Zn 2+ , Cd 2+ and Pb 2+ are 0.029, 0.008 and 0.011 μM (S/N = 3), with linear ranges of 0.3–10, 0.01–2 and 0.03–2 μM, respectively. Meanwhile, the sensor exhibits good stability, reproducibility and anti-interference ability. As expected, CAU-17/CSG exhibits good accuracy in detecting metal ions in water and blood samples. Considering the simple preparation method, stable structure and excellent performance, the prepared composites will have great potential for environmental and biomedical applications.
研究领域:
环境科学
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生物医学工程
·
分析化学
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高影响因子
ANALYTICAL LETTERS
·
2023
·
IF 2
Qing Zhang,Chunrong Zhang,Nan Li,Zhao Dai
Aptamer-based biosensors have been demonstrated to provide real-time physical and chemical signals for biomedicine, food safety, drug identification, and metal ion determination. In this study, cadmium ion (Cd2+) was determined in drinking water by color signaling using the specific binding of the aptamer and target by its regulation of the catalytic capacity of gold nanoparticles (AuNPs). When sodium borohydride (NaBH4) and a probe with a catalytic function were present, the solution containing 4-nitrophenol changed from yellow to colorless. Under optimal conditions, the naked eye was sufficient to determine Cd2+ with a limit of detection (LOD) of 5 μM. The discoloration time showed a positive correlation with Cd2+ concentration up to 30 μM. This method was label-free, efficient, rapid, and selective for Cd2+ in water without expensive instruments, suggesting practical applications.
研究领域:
分析化学
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环境科学
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纳米技术
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生物医学工程
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Laifeng Ma,Xueyi Zhang,Muhammad Ikram,Mohib Ullah,Hongyuan Wu,Keying Shi
The fabricated intercalated structure composed of a Co-based zeolitic imidazolate framework (ZIF-67) and expanded graphite (EG) has been prepared using a facile and simple one-pot hydrothermal reaction. This framework was used to detect heavy metal ions (HMIs) via a square wave anodic stripping voltammetry (SWASV) method for the first time. Here, the composite material is useful for the selective electrochemical detection of nanomolar Cd 2+ , Pb 2+ , Cu 2+ and Hg 2+ in aqueous solutions simultaneously or individually. The operational parameters such as pH, electrolyte, deposition potential, and deposition time were optimized to detect various HMIs. The electrochemical properties and applications of the modified electrode were also studied. The constructed electrochemical sensor displays good performance with a large electrochemically active surface areas, high sensitivity and low limit of detection (LOD). These impressive features originate from the synergistic effects of ZIF-67 and EG. This study proposes a new strategy for heavy metal ion detection using a novel morphology of a metal–organic framework (MOF) composite.
研究领域:
材料科学
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环境科学
·
分析化学
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高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2022
·
IF 4.326
Longsheng Pei,Hanlun Yang,Shouhui Chen,Li Wang
The metal–organic framework (MOF) UiO-66-NH2 was synthesized and attached to kenaf stem-derived three-dimensional macroporous carbon (3D-KSC) simultaneously, and then, the isothiocyanate functional group was introduced into UiO-66-NH2 MOFs to prepare UiO-66-NHC(S)NHMe/3D-KSC nanocomposites. The amount of UiO-66-NHC(S)NHMe MOFs on 3D-KSC can be controlled easily by the monomer concentration. There were three adsorption sites (two nitrogen atoms and one sulfur atom) on each structural unit of UiO-66-NHC(S)NHMe for adsorption toward heavy metal ions (HMIs) and well-regulated pores and 3D macropores of 3D-KSC to promote the transfer of HMIs. Therefore, UiO-66-NHC(S)NHMe/3D-KSC nanocomposites can be applied for the removal and electrochemical detection of Cd2+, Pb2+, Cu2+, and Hg2+. The detection limits of Cd2+, Pb2+, Cu2+, and Hg2+ were 0.0125, 0.0124, 0.0111, and 0.0094 μM, respectively. The sensitivities were 879.1, 887.6, 992.5, and 1160.7 μA μM–1 cm–2, respectively. UiO-66-NHC(S)NHMe/3D-KSC showed fine reproducibility and stability as well as strong anti-interference ability. In addition, the HMIs can be removed effectively by UiO-66-NHC(S)NHMe/3D-KSC with the maximum adsorption capacity of 88, 391, 223, and 935 mg·g–1 for Cd2+, Pb2+, Cu2+, and Hg2+, respectively. The results show that UiO-66-NHC(S)NHMe/3D-KSC has great potential for the adsorption and detection of HMIs.
研究领域:
材料科学
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环境科学
·
分析化学
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DOI
高影响因子
RSC Advances
·
2020
·Vol. 10
·期 55
·33299-33306
·
IF 3.119
Rentian Guan,Lixia Tao,Yingying Hu,Cong Zhang,Yongping Wang,Min Hong,Qiaoli Yue
In this work, a fluorescence method was developed for selective detection of Ag+ in the presence of Cd2+, Hg2+, and Cu2+ based on gold nanoclusters (AuNCs). That is, bovine serum albumin (BSA) templated AuNCs with double emission peaks were synthesized using BSA as a protective agent. AuNCs with uniform distribution and average size between 2.0 and 2.2 nm were synthesized using a green and simple method, and showed bright orange-red fluorescence under ultraviolet light. AuNCs have two emission peaks at 450 nm and 630 nm with an excitation wavelength of 365 nm. Under alkaline conditions, Cd2+ can combine with the surface sulfhydryl groups of BSA–AuNCs to form Cd–S bonds, which cause AuNCs to aggregate, resulting in an increase in fluorescence intensity at 630 nm. Conversely, due to the d10–d10 metal affinity interaction, the addition of Hg2+ can reduce the fluorescence peak at 630 nm. Ag+ was reduced to Ag0 by gold nuclei in AuNCs, forming a stable hybrid Au@ AgNCs species with blue-shifted and enhanced fluorescence. Finally, the paramagnetic behavior of Cu2+ combined with BSA causes the excited electrons of the gold cluster to lose their energy via ISC, eventually leading to simultaneous quenching of the two emission peaks. The results show that the limit of detection (LOD) of Ag+, Hg2+, Cd2+ and Cu2+ is 1.19 μM, 3.39 μM, 1.83 μM and 5.95 μM, respectively.
研究领域:
分析化学
·
材料科学
·
生物化学
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PubMed
高影响因子
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