Journal of Biobased Materials and Bioenergy
·
2018
·Vol. 12
·期 3
·266-270
·
IF 2.993
Wang Lijun,You Qianqian,Yao Shuangquan,Zhu Hongxiang,Li Xiaokun,Weng Mengling
In this study, the adsorption effect of Pb2+ and Cd2+ was investigated using amphoteric modified bagasse hemicellulose as adsorbent. The heavy metal ions adsorbed increased slowly after 30 min, and remained stable after 180 min. Application of level-2 dynamic model
describing the amphoteric modified bagasse hemicelluloses gave the adsorption capacity of lead and cadmium were at 65.79 mg · g–1 and 36.23 mg · g–1, respectively. At the temperature of 293 K, the pseudo-second-order dynamics equations for the
adsorption of Pb2+ and Cd2+ were as follows: dqt/dt = 0.0231(65.79–qt
)2, dqt/dt = 0.0428(36.23–qt
)2. Ion coexisting experiments showed that the affinity of Pb2+
was much higher than that of Cd2+.
研究领域:
环境科学
·
生物化学
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DOI
高影响因子
Water
·
2022
·Vol. 14
·期 24
·4085
·
IF 3.53
Wenxuan Li,Xueli Wang,Haizhen Kong,Dan Zhang
Increased anthropogenic activities have caused cadmium pollution in Qinghai–Tibet Plateau, which is harmful to human health. This paper investigated aqueous Cd2+adsorption using biochar of three typical vegetation types in cold and arid areas of the Qinghai–Tibet Plateau: (i) Chinese wolfberry (GBB), (ii) highland barley (QBB), and (iii) seabuckthorn (SBB). In order to investigate the effect of pyrolysis temperature on the performance of biochar for cadmium adsorption, three types of biochar were prepared at 350 °C, 500 °C, and 650 °C. The as-prepared biochar was characterized by scanning electron microscopy (SEM), Thermogravimetric (TG), Fourier transform infrared spectroscopy (FT-IR), and Brauer–Emmett–Teller (BET) analysis. The results showed that the biochar prepared at 650 °C had the best adsorption capacity. Compared with QBB and SBB, the GBB had a higher Cd2+adsorption capacity of 19.48 mg/g. Moreover, the effects of biochar dosage, experimental temperature, and biochar preparation temperature on the adsorption of Cd2+by biochar and the interaction between the factors were investigated using Box–Behnken Design (BBD). As a result, the amount of biochar dosage showed the most obvious influence on Cd2+adsorption capacity, followed by sample preparation temperature and experimental adsorption temperature. This study paves the way for the design of biochar for Cd2+adsorption in wastewater.Keywords:biochar;adsorption;response surface methodology;heavy metal cadmium
研究领域:
环境科学
·
材料科学
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DOI
高影响因子
OPTICAL FIBER TECHNOLOGY
·
2026
·
IF 2.7
Shaojun Zhang,Ziyu Hu,Shaowa Lü,Xueyan Bi,Yanyang Lei
This study presents a novel optical fiber sensor based on a MoS 2 @Fe 3 O 4 @CTS ion-imprinted polymer (MFC-IIP) functionalized single-mode fiber-no-core fiber-multi-mode fiber-no-core fiber-single-mode fiber (SNMNS) structure for the quantitative detection of trace cadmium ions (Cd 2+ ) in solution. The MFC-IIP nanomaterial was coated onto the surface of the SNMNS fiber structure as a selective sensing membrane to enable highly sensitive and specific detection of Cd 2+ . The experimental results demonstrate that the sensor achieves a maximum detection sensitivity of 119.06 nm/μM for cadmium ions, with a limit of detection (LOD) as low as 0.77 nM. This study introduces a novel detection approach applicable to real-time online water quality monitoring, early diagnosis of chronic cadmium poisoning, and the rapid analysis of heavy metal cadmium in complex traditional Chinese medicine matrices.
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高影响因子
ENVIRONMENTAL POLLUTION
·
2025
·
IF 7.3
Wenjie Li,Jian Wang,Xuwen Chen,Ahmed Mosa,Wanting Ling,Yanzheng Gao
Biochar exhibits significant potential for the remediation of soil contaminated with organic pollutants and heavy metals. A comprehensive understanding of the interfacial interactions and sorption mechanisms of low-hydrophobicity phthalate plasticizers, such as dimethyl phthalate (DMP) and diethyl phthalate (DEP), along with Cd 2+ on biochar, is essential for the effective remediation of polluted soil environments. This study systematically examines the interaction and sorption mechanisms of PAEs-Cd 2+ on biochar at both macro and micro levels using sorption batch experiments and molecular dynamics simulations. The sorption of contaminants by biochar occurred through a combination of physical and chemical mechanisms. The presence of coexisting pollutants reduced the sorption capacity of biochar to PAEs but had a minimal effect on Cd 2+ adsorption. In the co-sorption system, PAEs and Cd 2+ demonstrated distinct interaction behaviors. Due to its smaller molecular size and higher diffusion coefficient, Cd 2+ readily bonded to surface sorption sites on biochar and infiltrated its pores. Although PAE-ion complexes enhanced the sorption of pollutants by biochar, PAE molecules, and cluster structures primarily accumulated on the biochar surface, interacting with heavy metals through electrostatic forces. This interaction reduced the contribution of pore filling to pollutant sorption and weakened the desorption hysteresis capacity of biochar. The intraparticle diffusion model had similar results. Thus, a larger specific surface area and an abundant pore structure are crucial factors in improving the co-sorption capacity of biochar. This study offers novel insights into the sorption behavior of PAEs and Cd 2+ on biochar within organic-inorganic composite pollution.
研究领域:
环境科学
·
土壤修复
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产品关联
DOI
PubMed
高影响因子
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
·
2015
·Vol. 2015
·期 34
·5656-5661
·
IF 2.942
Shanshan Fu,Xiuli Zhang,Guojuan Ren,Fang Chai,Chungang Wang
Graphical Galactosamine-stabilized gold nanoparticles are used as a highly selective, sensitive, and rapid colorimetric nanosensor for the detection of Cd 2+ ions in water. A linear response to the concentration of Cd 2+ ions is observed in the range 1 to 100 n M . Cadmium is one of the most toxic and dangerous heavy-metal elements to human health and environmental safety. Therefore, it is very useful to develop simple, rapid, and sensitive methods for the detection of Cd 2+ ions in real samples. Here, we report the simple synthesis of galactosamine-functionalized gold nanoparticles (Galn-GNPs) at room temperature. The Galn-GNPs can be used as a colorimetric probe for the detection of Cd 2+ ions through localized surface plasmon resonance. A linear response to the concentration of Cd 2+ ions was observed in the range 1 to 100 n M . The detection limit is as low as 3 n M , which is below the maximum recommended contamination level of the World Health Organization for cadmium in drinking water of 3 ppb (15 n M ). The specific interactions of Cd 2+ ions with Galn-GNPs provided excellent selectivity for the detection of Cd 2+ ions over 15 other metal ions (Pb 2+ , Mg 2+ , Zn 2+ , Ni 2+ , Cu 2+ , Co 2+ , Ca 2+ , Mn 2+ , Cr 3+ , Ba 2+ , Cr 6+ , Ag + , Fe 3+ , Al 3+ , and Hg 2+ ). The selectivity of this system toward Cd 2+ ions was remarkably fivefold higher than that for other metal ions. The aggregation-based change in color from red to purple occurred in less than 20 s. This method is simple and fast and has also been successfully applied to the detection of Cd 2+ ions in lake-water samples.
研究领域:
环境科学
·
分析化学
·
纳米技术
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DOI
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2018
·
IF 4.61
Yanji Jiang,Xiongxiong Zhang,Xianqiang Yin,Huimin Sun,Nong Wang
This paper provides an overview of the effect of graphene oxide (GO) on sorption , transport, and remobilization of Pb 2+ and Cd 2+ ions in saturated porous media. The affinity of GO to Pb 2+ and Cd 2+ ions was investigated via kinetic and isothermal sorption experiments. Laboratory packed-column experiments were also conducted to investigate the cotransport of Pb 2+ and Cd 2+ ions with GO across a quartz sand matrix. In addition, the Pb 2+ - and Cd 2+ -preequilibrated sand column was sequentially flushed with GO to test its remobilization effect on these ions. GO exhibited a high affinity toward both Pb 2+ and Cd 2+ ions with maximum sorption capacities of 1428.57 and 911.43 mg g −1 , respectively. On the other hand, while GO improved the transport ability of Pb 2+ and Cd 2+ , both ions reduced the mobility of GO in saturated porous media. Data from the elution experiment revealed that the high affinity of GO toward the metal ions led to the remobilization of the presorbed Pb 2+ and Cd 2+ ions onto the quartz sand surfaces and their concurrent migration across the sand column. XDLVO (Extended Derjaguin-Landau-Verwey-Overbeek) calculations were employed to interpret the GO transport behavior in the column wells. The cotransport of Pb 2+ and Cd 2+ ions with GO in the saturated quartz sand was successfully simulated by the advection-dispersion-reaction equation. Findings from this study provide an insight on the potential implications of remobilization and spread of pollutants by nanomaterials existing in vulnerable ecosystems.
研究领域:
环境科学
·
纳米材料
·
污染物流体力学
·
土壤与水化学
·
环境纳米技术
✓ 已验证
DOI
高影响因子
COMPUTERS AND ELECTRONICS IN AGRICULTURE
·
2023
·
IF 8.3
Qiaolin Liu,Hui Wang,Jiangtao Ji,Wenxuan Zhang,Anqi Wang,Bo Zhao,Zhi Chen
Cadmium ions (Cd 2+ ) are one of the highly poisonous heavy metal ions in the environment, but at present, the detection of Cd 2+ on the market has the disadvantages of complex operation, high detection cost and slow detection speed, so it is urgent to develop rapid and sensitive detection platforms for detecting Cd 2+ . In this study, a novel electrochemical sensor (g-C 3 N 4 /CuNps) was successfully fabricated. g-C 3 N 4 /CuNps composite has a large and unique surface area that is beneficial to the adsorption and preconcentration of Cd 2+ . The experiment parameters such as deposition potential, deposition time, pH of supporting electrolyte, supporting electrolyte, the amount of g-C 3 N 4 /CuNps being coated on the GCE, were optimized. Under the optimized conditions, the electrochemical performances of g-C 3 N 4 /CuNps composites modified sensor have been investigated, which shows excellent wider linear range and lower detection limit (0.098 nM). The linear ranges of Cd 2+ detections were 1-100µgL -1 . Moreover, the sensor shows desirable stability, selectivity, and reproducibility for detecting Cd 2+ . For real water samples, the sensor has a satisfactory recovery rate, indicating that the sensor could be successfully applied in the determination of Cd 2+ in environmental water. Therefore, the designed sensor provides a potential simple and low cost material for electrochemical detection of Cd 2+ .
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DOI
高影响因子
Synthetic and Systems Biotechnology
·
2023
·
IF 4.8
Shuting Hu,Guangbao Zhang,Xiaoqiang Jia
In this study, we designed a Cd 2+ whole-cell biosensor with both positive and negative feedback cascade amplifiers in Pseudomonas putida KT2440 (LTCM) based on our previous design with only a negative feedback amplifier (TCM). The results showed that the newly developed biosensor LTCM was greatly improved compared to TCM. Firstly, the linear response range of LTCM was expanded while the maximum linear response range was raised from 0.05 to 0.1 μM. Meanwhile, adding a positive feedback amplifier further increased the fluorescence output signal of LTCM 1.11–2.64 times under the same culture conditions. Moreover, the response time of LTCM for detection of practical samples was reduced from 6 to 4 h. At the same time, LTCM still retained very high sensitivity and specificity, while its lowest detection limit was 0.1 nM Cd 2+ and the specificity was 23.29 (compared to 0.1 nM and 17.55 in TCM, respectively). In summary, the positive and negative feedback cascade amplifiers effectively improved the performance of the biosensor LTCM, resulting in a greater linear response range, higher output signal intensity, and shorter response time than TCM while retaining comparable sensitivity and specificity, indicating better potential for practical applications.
研究领域:
生物技术
·
环境科学
·
合成生物学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF COORDINATION CHEMISTRY
·
2021
·
IF 1.751
Liqun Bai,Kaikai Hu,Shouwen Jin,Xianhong Wen,Weiqiang Xu,Daqi Wang
The present report pertains to the synthesis and characterization of six complexes, [Zn2(μ-dmpz)2(Hdmpz)2(H2O)2](ClO4)2 (1) (Hdmpz = 3,5-dimethylpyrazole, dmpz = 3,5-dimethylpyrazolate), Cd(Hdmpz)(L1)2 (2) (L1 = 2-methylbenzoate), [Zn2(μ-dmpz)2(Hdmpz)2(L2)2] (3) (L2 = 3-chlorobenzoate), Zn(Hdmpz)2(L3)2 (4) (L3 = 3,4-dichlorobenzoate), Cd(Hdmpz)4(L4)2 (5) (L4 = 5-bromosalicylate), and Zn2(Hdmpz)4(L5)2·3H2O (6) (L5 = fumarate). These complexes were characterized by EA, IR, SCXRD analysis, and TGA.The X-ray studies show that these complexes have mononuclear to dinuclear structures with tetrahedral/octahedral arrangement around each Zn2+/Cd2+. The Hdmpzs in 2 and 4–6 are monodentate ligated via its neutral N, while 1 and 3 have neutral Hdmpzs and the ionic dmpzs. The CO2− of 3–6 is only monodentate. Compound 2 has both monodentate bridging and chelating bidentate CO2-.Intramolecular N–H···O H-bond from Hdmpz and ClO4- was present in 1. The coordinated O of CO2- in 2 accepts an intramolecular N–H···O H-bond from N-H of the Hdmpz and uncoordinated O of the CO2- in 3, 4 and 5 has an intramolecular N–H···O H-bond with N-H of the Hdmpz. Compound 6 has intramolecular N–H···O H-bonds from the Hdmpz, the uncoordinated O and H2O. The intricate intra- and intermolecular classical H-bonds, Br···O, CH···Cl, CH3···Cl, CH···Br, C–H···O, CH3···O, C···π, O···π, O···C, Cl-π, C–H···π and CH3···π associations are elucidated by X-ray crystallographic studies, which convert discrete units into high-dimensional ordered supramolecular structures.
研究领域:
无机化学
·
材料科学
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DOI
高影响因子
Inorganic Chemistry Frontiers
·
2019
·Vol. 6
·期 7
·1785-1792
·
IF 5.934
Yunzheng Wang,Pu Bai,Zhuwei Jin,Yan Li,Yaorui Li,Wei Shi,Xue Zhou,Jun Xu,Wenfu Yan,Ruren Xu
Clinoptilolite (HEU) mineral is by far the most common natural zeolite; it has been described as an excellent adsorbent for heavy metal ions and radioactive 137Cs+. Heulandite, which possesses the same framework topology as clinoptilolite, has a lower Si/Al ratio than clinoptilolite. Thus, superior performance is expected for heulandite in harmful ion removal due to its higher cation exchange capacity. However, it has proved to be a great challenge to synthesize heulandite because of the harsh synthesis conditions and poor reproducibility of the reported synthesis methods. Herein, heulandite was facilely obtained via hydrothermal synthesis using natural stellerite (STI) zeolite as a seed. This is the first time that natural stellerite zeolite has been used as a seed; however, it affords a different zeolite. The present results reveal that the phase selectivity of heulandite is sensitive to its crystallization conditions, including the SiO2/Al2O3 and Na2O/SiO2 ratios of the initial gel, seed content, and heating temperature. The pure heulandite can be readily reproduced in a narrow crystallization field. The as-synthesized heulandite shows much higher Cd2+ sorption capacity than natural or synthesized clinoptilolite. Compared to the Na+ form heulandite, the H+ form heulandite shows much better thermal stability; thus, heulandite has potential applications in catalysis and gas separation.
研究领域:
材料科学
·
环境科学
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DOI
高影响因子
Journal of Nanomaterials
·
2015
·
IF 1.644
Long Jiao,Peishi Qi,Yunzhi Liu,Bo Wang,Lili Shan
Magnetic ferroferric oxide (Fe3O4) nanoparticles embedded sodium alginate (SA)/polyvinylpyrrolidone (PVP)/calciumgel composites (MSPC) were synthesized for the removal of Cd2+. The physicochemical properties of the composite gel ball were characterized by scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), power X-ray diffraction patterns (XRD), and vibrating sample magnetometer (VSM). Quantitative adsorptions experiments were performed in view of sorbent dosage, pH, contact time, and temperature. Results showed that the optimum quantity of particles was 1.2 gL−1, when the Cd2+ concentration was fixed at 150 mg/L. The optimum pH for adsorption is 6.2. When the initial Cd2+ concentration was from 50 to 200 mgL−1, the adsorption equilibrium time was 80–120 minutes. The isotherms results showed the maximum sorption was 97.8 mg/g calculated from the Langmuir isotherm. The pseudo-second-order kinetic model could be well described by the sorption of Cd2+ in the sediment. The correlation coefficients (R2) were all higher than 0.96. Results showed that MSPC was a practical and low-cost material for heavy metal removal from the river sediment and simultaneously solves the problems in convenient separation under additional magnetic field.
研究领域:
环境科学
·
材料科学
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DOI
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2018
·
IF 4.61
Renlu Liu,Bin Lian
Ubiquitous bio-minerals exert significant effects on the migration and transformation of metal ions in the environment, however, research into the adsorption of heavy metals by biogenic vaterite (BV) has rarely been reported. The aim of our research was to evaluate the removal effects of Cd 2+ , Ni 2+ , and Cu 2+ in single and multi-metal ion aqueous solutions using BV induced by Bacillus subtilis . The results demonstrate that the adsorption data of BV for metal ions are more accurately fitted to the Langmuir model compared with the Freundlich model. The max adsorption capacity (mg/g) order of BV was Ni (270.27) > Cu (178.57) > Cd (172.41) in a single-metal system, and Cu (175.44) > Ni (94.34) > Cd (30.30) in a multi-metal system (pH = 5.0, 2.5 g/L). A competitive effect exists amongst heavy metals in multi-metal ion systems, and Cu 2+ adsorption is less affected by other two ions. Furthermore, BV can maintain favourable adsorption characteristics even in a very strong acidic environment (pH = 3.0), and its adsorptive capability becomes more favourable at higher temperatures. Kinetic analysis shows that the adsorption process can be better described by a pseudo-second-order model. XRD , FTIR, and SEM-EDS results reveal that metal ion adsorption on BV mostly happened through physical means, and the favourable adsorption characteristics of BV might be attributable to its larger specific surface area , aggregated spherical polyporous and organic–inorganic structure.
研究领域:
环境科学
·
地球微生物学
·
生物矿化
·
环境污染与修复
·
水处理技术
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DOI
高影响因子
危险品化学品经营许可证（带存储）