Simultaneous removal of cationic and anionic heavy metal contaminants from electroplating effluent by hydrotalcite adsorbent with disulfide (S2-) intercalation

Yuhao Zhou; Zhe Liu; Arixin Bo; Tana Tana; Xin Liu; Fu Zhao; Sarina Sarina; Manke Jia; Changjun Yang; Yuantong Gu; Huaili Zheng; Huaiyong Zhu

doi:10.1016/j.jhazmat.2019.121111

Simultaneous removal of cationic and anionic heavy metal contaminants from electroplating effluent by hydrotalcite adsorbent with disulfide (S^2-) intercalation

J Hazard Mater. 2020 Jan 15:382:121111. doi: 10.1016/j.jhazmat.2019.121111. Epub 2019 Sep 7.

Authors

Yuhao Zhou¹, Zhe Liu², Arixin Bo², Tana Tana², Xin Liu², Fu Zhao², Sarina Sarina³, Manke Jia⁴, Changjun Yang⁵, Yuantong Gu², Huaili Zheng⁶, Huaiyong Zhu²

Affiliations

¹ Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, China; State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044, China; School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Brisbane, QLD, 4001, Australia.
² School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Brisbane, QLD, 4001, Australia.
³ School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Brisbane, QLD, 4001, Australia. Electronic address: s.sarina@qut.edu.au.
⁴ College of Biological and Pharmaceutical Sciences, China Three Gorges University, Yichang 443002, China; School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Brisbane, QLD, 4001, Australia.
⁵ Key Laboratory of Catalysis and Materials Science of the State Ethnic Affairs Commission & Ministry of Education, Hubei Province, College of Chemistry and Material Science, South-Central University For Nationalities, Wuhan 430074, China; School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Brisbane, QLD, 4001, Australia.
⁶ Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, China; State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044, China. Electronic address: hlz6512@163.com.

PMID: 31563089
DOI: 10.1016/j.jhazmat.2019.121111

Abstract

Hydrotalcite materials are generally utilized for anionic pollutants due to its interlayered anion exchange ability. Their potentiality for cationic contaminants is rarely explored. In this study, disulfide (S^2-) intercalated LDH material demonstrated capability to remove both heavy metal cations and oxyanions simultaneously from water. The S^2- intercalation of LDH significantly improved its adsorption capability towards both heavy metal cations (Co²⁺ and Ni²⁺) and oxyanion (CrO₄^2-). The adsorption amount of S-LDH towards Co²⁺ and Ni²⁺ reached 88.6mg/g and 76.2mg/g, which are 405% and 281% higher than that of pristine LDH. For CrO₄^2- removal, the adsorption amount reached 34.7mg/g, 402% higher than that of pristine LDH. The cations capture mechanism mainly depends on the novel layer sheet cation substitution mechanism based on irreversible precipitation and the generation of metal sulfide precipitates. Meanwhile, the interlayered S^2- can be easily replaced by CrO₄^2- to realize the simultaneous removal of both heavy metal cations and oxyanions. In the fixed-bed column experiments, 448 bed volume (BV) (672 mL) of simulating electroplating wastewater can be efficiently treated by yielding only 1 BV(15 mL) of chemical sludge, which is practically acceptable. This work provided a highly practical adsorption technology based on the S^2- modification hydrotalcite material for the purification of heavy metal ions contaminated wastewater.

Keywords: Anion removal; Cation removal; Heavy metal contaminants; Hydrotalcite; Wastewater treatment.

Publication types

Research Support, Non-U.S. Gov't