SCI和EI收录∣中国化工学会会刊

中国化学工程学报 ›› 2021, Vol. 40 ›› Issue (12): 245-255.DOI: 10.1016/j.cjche.2020.10.021

• Resources and Environmental Technology • 上一篇    下一篇

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

Qingrong Zou1,2, Wanyu Wang3, Tong Zhang1,2, Yuanyuan Liu1,2   

  1. 1. State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044, China;
    2. Key Laboratory of the Three Gorges Reservoir Region’s Eco-Environment of Ministry of Education, Chongqing University, Chongqing 400044, China;
    3. Central-Southern Safety & Environment Technology Institute Co., Ltd, Wuhan 430061, China
  • 收稿日期:2020-05-14 修回日期:2020-10-23 出版日期:2021-12-28 发布日期:2022-01-14
  • 通讯作者: Yuanyuan Liu,E-mail:Liuyuanyuan@cqu.edu.cn
  • 基金资助:
    This work was supported by the National Natural Science Foundation of China (51778084), the National key Research & Development program of China (2018YFC1800305), the Chongqing Ecology and Environment Bureau (2019-128), the Sichuan Science and Technology Program (2019YFSY0005) and the Large Instruments Open Foundation of Chongqing University (201903150051).

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

Qingrong Zou1,2, Wanyu Wang3, Tong Zhang1,2, Yuanyuan Liu1,2   

  1. 1. State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044, China;
    2. Key Laboratory of the Three Gorges Reservoir Region’s Eco-Environment of Ministry of Education, Chongqing University, Chongqing 400044, China;
    3. Central-Southern Safety & Environment Technology Institute Co., Ltd, Wuhan 430061, China
  • Received:2020-05-14 Revised:2020-10-23 Online:2021-12-28 Published:2022-01-14
  • Contact: Yuanyuan Liu,E-mail:Liuyuanyuan@cqu.edu.cn
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (51778084), the National key Research & Development program of China (2018YFC1800305), the Chongqing Ecology and Environment Bureau (2019-128), the Sichuan Science and Technology Program (2019YFSY0005) and the Large Instruments Open Foundation of Chongqing University (201903150051).

摘要: Cadmium (Cd), lead (Pb), and hexavalent chromium (Cr(VI)) are often found in soils and water affected by metal smelting, chemical manufacturing, and electroplating. In this study, synthetic iron sulfide nanoparticles (FeS NPs) were stabilized with carboxymethyl cellulose (CMC) and utilized to remove Cr(VI), Cd, and Pb from an aqueous solution. Batch experiments, a Visual MINTEQ model, scanning electron microscopy (SEM), X-ray diffraction (XRD), and X-ray photoelectron spectrometer (XPS) analysis were used to determine the removal efficiencies, influencing factors, and mechanisms. The FeS NP suspension simultaneously removed Cr(VI), Cd, and Pb from an aqueous solution. The concentrations of Cr(VI), Cd, and Pb decreased from 50, 10, and 50 mg·L-1 to 2.5, 0.1, and 0.1 mg·L-1, respectively. The removal capacities were up to 418, 96, and 585 mg per gram of stabilized FeS NPs, respectively. The acidic conditions significantly favored the removal of aqueous Cr(VI) while the alkaline conditions favored the removal of Cd and Pb. Oxygen slightly inhibited the removal of Cr(VI), but it had no significant influence on the removal of Cd and Pb. A potential mechanism was proposed for the simultaneous removal of Cr(VI), Cd, and Pb using FeS NPs. The interactions of the three heavy metals involved a cationic bridging effect on Cr(VI) by Cd, an enhanced adsorption effect on Cd by [Cr,Fe](OH)3, precipitation of PbCrO4, and transformation of PbCrO4 to PbS. Therefore, FeS NPs have a high potential for use in the simultaneous removal of Cr(VI), Cd, and Pb from contaminated aqueous solutions.

关键词: Iron sulfide, Nanoparticles, Multi-heavy metal contamination, Simultaneous removal, Environment, Remediation

Abstract: Cadmium (Cd), lead (Pb), and hexavalent chromium (Cr(VI)) are often found in soils and water affected by metal smelting, chemical manufacturing, and electroplating. In this study, synthetic iron sulfide nanoparticles (FeS NPs) were stabilized with carboxymethyl cellulose (CMC) and utilized to remove Cr(VI), Cd, and Pb from an aqueous solution. Batch experiments, a Visual MINTEQ model, scanning electron microscopy (SEM), X-ray diffraction (XRD), and X-ray photoelectron spectrometer (XPS) analysis were used to determine the removal efficiencies, influencing factors, and mechanisms. The FeS NP suspension simultaneously removed Cr(VI), Cd, and Pb from an aqueous solution. The concentrations of Cr(VI), Cd, and Pb decreased from 50, 10, and 50 mg·L-1 to 2.5, 0.1, and 0.1 mg·L-1, respectively. The removal capacities were up to 418, 96, and 585 mg per gram of stabilized FeS NPs, respectively. The acidic conditions significantly favored the removal of aqueous Cr(VI) while the alkaline conditions favored the removal of Cd and Pb. Oxygen slightly inhibited the removal of Cr(VI), but it had no significant influence on the removal of Cd and Pb. A potential mechanism was proposed for the simultaneous removal of Cr(VI), Cd, and Pb using FeS NPs. The interactions of the three heavy metals involved a cationic bridging effect on Cr(VI) by Cd, an enhanced adsorption effect on Cd by [Cr,Fe](OH)3, precipitation of PbCrO4, and transformation of PbCrO4 to PbS. Therefore, FeS NPs have a high potential for use in the simultaneous removal of Cr(VI), Cd, and Pb from contaminated aqueous solutions.

Key words: Iron sulfide, Nanoparticles, Multi-heavy metal contamination, Simultaneous removal, Environment, Remediation