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American Journal of Analytical Chemistry 2023年第6期14卷 274-286页

作者： Taha Fadlou Allah Kaltrina Jusuf Ali A. Shohatee Liang Feng Louis Trombetta Enju Wang Department of Chemistry St. John’s University Jamaica New York USA Department of Chemistry Faculty of Natural Science and Mathematics University of Prishtina “Hasan Prishtina” Prishtina Kosovo Department of Pharmaceutical Sciences St. John’s University Jamaica New York USA

Using environment-friendly and low-cost biowaste adsorbents as toxic metal ion removal substrates from aqueous solutions has a great economic advantage. This work evaluated pumpkin and potato peel biowastes for the adsorption of cadmium ions. The biowastes were treated with acid or base. Batch experiments were carried out by introducing a known concentration of metal ion solution into the biowaste sorbent at various pH levels. The pH and metal ion concentration was monitored with pH and cadmium ion-selective electrode continuously for two hours, and the final concentration for the metal ion after 24 hours was measured with the cadmium electrode and then confirmed with ICP-OES. L-type isotherms were obtained that fit to Freundlich model. Adsorption isotherms showed chemical adsorption and the kinetics following the second order model. Equilibrium adsorption capacity is higher than 29 mg/g at pH 5.6 when the initial concentration is 220 ppm. Dynamic cadmium adsorption capacity is 17 mg/g from aqueous solution when the feed solution is 220 ppm with pumpkin peel biowaste sorbent. The biowaste materials can be regenerated with acid washing.

关键词： cadmium ion Biowaste Sorbent ion-Selective Electrode ICP-OES

Preliminary Research on Cd^(2+) Removal from Wastewater by Sphaerotilus Natans

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Chemical Research in Chinese Universities 2005年第6期21卷 654-657页

作者： QIN Yu-chun GUAN Xiao-hui YIN Rong WANG Li-wen WEI De-zhou School of Resources and Civil Engineering Northeastern University Shenyang 110004 P. R. China Department of Applied Chemistry Northeast Institute of Electric Power Engineering Jilin 132012 P. R. China Department of Common Courses Beihua University Jilin 132011 P. R. China

Influencing factors, such as the biomass concentration, pH value, temperature and time of adsorption on the removal of Cd^2＋ were investigated when Sphaerotilus natans was used as a biosorbent. The results show that Sphaerotilus natans has a significant effect on the adsorption of Cd^2＋. The process of adsorption will reach the equilibrium in 20 min. Temperature has no significant effect on the adsorption. The removal rate of Cd^2＋. can approach to 90% under the conditions of pH 5.5, the biomass mass concentration O. 6 g/L and the initial mass concentration of cadmium ≤20 mg/L. The maximum specific uptake is 1.9 mmol/g dry biomass . The adsorption was fitted with the Freundlich isotherm adsorption equation when the concentration of Cd^2＋ is in a range of 0--100 mg/L. HCl and EDTA can desorb Cd^2＋ from biomass effectively.

关键词： Sphaerotilus natans cadmium ion Adsorption character Influencing factor

Removing Cd^(2+) by Composite Adsorbent Nano-Fe_3O_4/Bacterial Cellulose

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Chemical Research in Chinese Universities 2011年第6期27卷 1031-1034页

作者： LU Min GUAN Xiao-hui WEI De-zhou School of Chemical Engineering Northeast Dianli University Jilin 132012 P. R. China School of Resources ＆ Civil Engineering Northeastern University Shenyang 110004 P. R. China

A new composite adsorbent, nano-Fe3O4/bacterial cellulose（BC）, was prepared through blending method. The process of adsorbing Cd2＋ including its isotherm and kinetics measured was studied. The results show that the adsorption efficiency is improved because of huge surface area and surface coordination of nano-Fe3O4 particles. Its adsorption capacity is 27.97 mg/g and the maximum of Cd2＋ removal is 74%. The adsorption kinetics can be described by pseudo-second rate model and the adsorption equilibrium by Langmuir type. The superparamagnetism of nano-Fe3O4 particles can help to solve the difficult separation of single BC adsorbent and lead to the quick separation of composite adsorbent from the liquid if a magnetic field was applied. Cd2＋ can be desorbed effectively by EDTA and HCl from the composite adsorbent, which can make it be reused.

关键词： Nano-Fe3O4 Bacterial cellulose Composite adsorbent cadmium ion

Quantum Chemistry Study on Benzimidazoledithi Derivatives' Selective Pre-enrichment of cadmium Cation

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Chinese Journal of Structural Chemistry 2018年第12期37卷 1860-1868,1843页

作者： LI Shao-Yuan GENG Chao YANG Zi-Heng YANG Xi CHEN Xiu-Min CHEN Xiu-Hua MA Wen-Hui State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization Kunming 650093China Faculty of Physical Science and Technology Yunnan UniversityKunming 650091China Yunnan Provincial Energy Research Institute Co. Ltd. Kunming 650093China

This work reports the mechanism of benzimidazoledithi(BDT) derivatives’ selective pre-enrichment of Cd2+under the stimulation of glutathione(GSH). The geometric and electronic properties of five BDT-M2+complexes(M = Cd, Cu, Hg, Pb, Co) have been investigated using density functional theory(DFT) at the B3 LYP/6-311 G(d,p) level with the GAUSSIAN 09 package program. The results show that BDT ligand exhibits alternative behaviors to different metal ions with the binding affinity in the order of Cu2+> Cd2+> Pb2+> Hg2+> Co2+. After adding the BDT-M2+complex into the GSH solution, the new S–S bonds can be formed, resulting with benzimidazole-metal ions(MBI-M2+) falling off into the GSH solution. Furthermore, the weak interaction between the new glutathione derivative(GSHD) and MBI-M2+were found. However, the strong chelation was detected between GSHD and MBI-M2+(M = Cu, Pb, Hg, Co) to hinder the adsorbed Cu2+, Pb2+and Hg2+, Co2+completely falling into the GSH solution, which suggests porous silicon composite modified by BDT has a certain selective pre-enrichment of Cd2+ion.

关键词： benzimidazoledithi(BDT) derivatives selective pre-enrichment glutathione cadmium ion density functional theory

Sorption of Heavy Metal and Organic Pollutants on Modified Soils

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Pedosphere 2007年第2期17卷 235-245页

作者： MENG Zhao-Fu ZHANG Yi-Ping WANG Guo-Dong College of Life Science Northwest Sci-Tech University of Agriculture and Forestry Yangling 712100 （China）. College of Natural Resources and the Environment Northwest Sci-Tech University of Agriculture and Forestry Yangling 712100 （China）

Sorption characteristics of both an organic pollutant (phenol) and a heavy metal (cadmium ion) on the clay layer of a Lou soil (Eum-orthic Anthrosol in Chinese Soil Taxonomy) along with the sorption mechanism were investigated using three soil treatments: modification with a cationic surfactant cetyltrimethylammonium bromide added at an amount equivalent to 50% and 100% of the soil CEC (50%CB and 100%CB), modification with an amphoteric surface-modifying agent dodecyldimethylbetaine (commercially known as BS-12) added at an amount equivalent to 50% and 100% of the soil CEC (50% BS and 100%BS), and an unmodified control (CK). Results showed that the BS soil treatments increased sorption of both the heavy metal Cd2+ and the organic pollutant phenol. The equilibrium sorption amount of Cd2+ decreased in the order: 50%BS > 100%BS > CK > 50%CB > 100%CB, with the BS soil treatments being about 1.3 to 1.8 times higher and the CB soil treatments about 23% to 41% lower than CK. Both the single-site and two-site Langmuir models could be applied to describe the sorption of Cd2+ in each soil treatment. The equilibrium sorption amount of phenol on the soil samples decreased in the order: 100%CB > 50%CB > 100%BS > 50%BS > CK, with the CB soil treatments being 41.0 to 79.6 times higher and the BS soil treatments 4.0 to 8.3 times higher than CK. The Freundlich equation could also be used to describe the sorption characteristics of phenol. In the BS soil treatments, both an organophobic long carbon chain and hydrophilic charged groups resulted in a relatively strong sorption ability for both heavy metals and organic pollutants. In addition, the sorption ratio K, the ratio of phenol sorption amount of the modified soil to that of CK, increased initially and decreased later with the amount of phenol added, and the critical sorption ratio KC, the peak value of the sorption ratio curve plotted against the added phenol concentration, was a good index for evaluating the sorption ability of

关键词： amphoteric surface modifying agent cadmium ion phenol sorption characteristics sorption ratio K

Proteomic study for rice seedling responses to cadmium stress

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Proteomic study for rice seedling responses to cadmium stres...

Kinetic research on the sorption of aqueous cadmium on carbonate hydroxyapatite

有毒化学污染物监测与风险管理技术交流研讨会

作者： Cai-lin Ge~(**1),Ze-Gang Wang,Ding-Zhen Wan,Yan Ding, Yu-Long Wang,Qi Shang and Shi-Shi Luo (Jiangsu Provencial Key Laboratory Of Crop Genetics and Physiology,Yangzhou University,Yangzhou 225009,China)

The effect of heavy metals Cd on the proteome in rice(Oryza sativa L.) seedlings was investigated by two dimensional gel *** peptide mass fingerprints of Cd inducible proteins were analyzed by MALDI-TOF *** software of Mascot was used to search and identify the Cd inducible proteins against protein *** results show that Cd stress had significant effect on global proteome in rice roots and *** expressions of considerable amount proteins were either inhibited or induced by Cd *** analysis of the category and function of Cd inducible proteins showed that,when rice seedlings were exposed to Cd,different kinds of responses were produced in rice roots and *** responses included binding and compartmentation of Cd,detoxification of toxic substances,degradation of denatured proteins or inactivated enzymes and regulation of physiologic metabolism,induction of pathogenesis-related proteins,and might also included synthesis of metallothionein-like proteins.

关键词： rice cadmium ion proteome stress response

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Acta Geochimica 2006年第S1期 84-84页

作者： Yu LIU1,2, Huanyan XU2 1 School of Material Science and Technology, Wuhan Institute of Technology, Wuhan 430073, China 2 School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150050, China