硫化亚铁纳米颗粒同步去除水溶液中的Cr(VI)，Cd(II)和Pb(II)：影响因素和重金属相互作用

邹晴荣; 王婉玉; 张桐; 刘元元

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Simultaneous removal of Cr(VI), Cd(II) and Pb(II) from aqueous solution by stabilized iron sulfide nanoparticles: Influencing factors and interactions of heavy metals

首发时间：2020-03-27

ZOU Qingrong ¹
ZOU Qingrong (1995-), female, master, main research: soil remediation
WANG Wanyu ² ZHANG Tong ¹ LIU Yuanyuan ¹
LIU Yuanyuan (1977-), male, professor, main research: soil remediation

1、Key Laboratory of the Three Gorges Reservoir Region’s Eco-Environment of Ministry of Education, Chongqing University,Chongqing 400044, China
2、Central-Southern Safety & Environment Technology Institute Co., Ltd, Wuhan, Hubei 430061, China

Abstract：Cadmium (Cd), lead (Pb) and hexavalent chromium (Cr(VI)) often appear simultaneously in the soil and water influenced by metal smelting, chemical manufacturing and electroplating. In this study, synthetic iron sulfide nanoparticles (FeS NPs) stabilized with carboxymethyl cellulose (CMC) were utilized to remove Cr(VI), Cd and Pb from aqueous solution. Batch experiments, Visual MINTEQ model and XPS analysis were used to determine the removal efficiencies, influencing factors and mechanisms. FeS NPs suspension could remove Cr(VI), Cd and Pb simultaneously from aqueous solutions with removal capacities of Cr(VI), Cd and Pb of up to 418, 96, 585 mg per gram of stabilized FeS NPs and with final concentrations of 2.5, 0.1 and 0.1 mg/L at initial concentrations of 50, 10 and 50 mg/L, respectively. The acidic conditions significantly favored the removal of aqueous Cr(VI), while the alkaline conditions favored the removal of Cd and Pb. Oxygen would slightly inhibit the removal of Cr(VI), and there was no significant influence on that of Cd and Pb. A potential mechanism was proposed for the simultaneous removal of Cr(VI), Cd and Pb by using FeS NPs. Interactions of the three heavy metals involves the cationic bridging effect of Cd to promote the adsorption of Cr(VI), the enhanced adsorption effect to Cd by Cr-Fe-hydroxides, and the enhanced precipitation to Pb by chromate and sulfate. Therefore, FeS NPs have a high potential for the simultaneous removal of Cr(VI), Cd and Pb from the contaminated aqueous solutions.

keywords： Iron sulfide nanoparticles Heavy metals Simultaneous removal pH Oxygen

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硫化亚铁纳米颗粒同步去除水溶液中的Cr(VI)，Cd(II)和Pb(II)：影响因素和重金属相互作用

邹晴荣 ¹
ZOU Qingrong (1995-), female, master, main research: soil remediation
王婉玉 ² 张桐 ¹ 刘元元 ¹
LIU Yuanyuan (1977-), male, professor, main research: soil remediation

1、重庆大学三峡库区生态环境教育部重点实验室，重庆 400044
2、中南安全环境技术研究院股份有限公司，湖北 430061

摘要：在金属冶炼、化工制造和电镀等行业场地，土壤和水中常出现Cr(VI)、Cd和Pb等重金属的复合污染。在这项研究中，用羧甲基纤维素（CMC）稳定的合成硫化铁纳米颗粒（FeS NPs）同步去除水溶液中的Cr(VI)，Cd和Pb。通过批实验、Visual MINTEQ模型和XPS分析来确定去除效率、影响因素和机理。在Cr(VI)，Cd和Pb初始浓度分别为50、10和50 mg/L时，最终可被去除至2.5、0.1和0.1 mg/L，去除能力达418、96、585 mg/g。酸性条件有利于Cr(VI)的去除，碱性条件有利于Cd和Pb的去除；氧气会抑制Cr(VI)的去除，但对Cd和Pb没有显著影响。三种重金属的相互作用包括Cd的阳离子桥联作用以促进Cr(VI)的吸附，Cr-Fe氢氧化物对Cd强化吸附作用，铬酸根和硫酸根对Pb的强化沉淀作用。因此，FeS NP可以同步去除水溶液中Cr(VI)、Cd和Pb。

关键词：硫化亚铁纳米颗粒重金属同步去除 pH 氧气

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ZOU Qingrong,WANG Wanyu,ZHANG Tong,et al. Simultaneous removal of Cr(VI), Cd(II) and Pb(II) from aqueous solution by stabilized iron sulfide nanoparticles: Influencing factors and interactions of heavy metals[EB/OL]. Beijing:Sciencepaper Online[2020-03-27]. https://www.paper.edu.cn/releasepaper/content/202003-310.

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论文编号	202003-310
论文题目	硫化亚铁纳米颗粒同步去除水溶液中的Cr(VI)，Cd(II)和Pb(II)：影响因素和重金属相互作用
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