A multifunctional adsorbent based on 2,3-dimercaptosuccinic acid/dopamine-modified magnetic iron oxide nanoparticles for the removal of heavy-metal ions

Ting Lei; Xue Jiang; Yu Zhou; Haiou Chen; Huiping Bai; Shixiong Wang; Xiangjun Yang

doi:10.1016/j.jcis.2023.01.011

A multifunctional adsorbent based on 2,3-dimercaptosuccinic acid/dopamine-modified magnetic iron oxide nanoparticles for the removal of heavy-metal ions

J Colloid Interface Sci. 2023 Apr 15:636:153-166. doi: 10.1016/j.jcis.2023.01.011. Epub 2023 Jan 5.

Authors

Ting Lei¹, Xue Jiang², Yu Zhou², Haiou Chen², Huiping Bai³, Shixiong Wang⁴, Xiangjun Yang⁵

Affiliations

¹ Research Center of Lake Restoration Technology Engineering for Universities of Yunnan Province, School of Chemical Science and Technology, Yunnan University, No. 2, Cuihu North Road, Kunming 650091, China; National Engineering Research Center for Compounding and Modification of Polymer Materials, Guizhou Material Industrial Technology Institute, No. 3491, Baijin Avenue, Guiyang 550014, China.
² Research Center of Lake Restoration Technology Engineering for Universities of Yunnan Province, School of Chemical Science and Technology, Yunnan University, No. 2, Cuihu North Road, Kunming 650091, China.
³ School of Materials and Energy, Key Laboratory of Micro/Nano Materials and Technology, Yunnan University, Kunming 650091, China.
⁴ Research Center of Lake Restoration Technology Engineering for Universities of Yunnan Province, School of Chemical Science and Technology, Yunnan University, No. 2, Cuihu North Road, Kunming 650091, China. Electronic address: wangshixiong@ynu.edu.cn.
⁵ Research Center of Lake Restoration Technology Engineering for Universities of Yunnan Province, School of Chemical Science and Technology, Yunnan University, No. 2, Cuihu North Road, Kunming 650091, China. Electronic address: yxjun@ynu.edu.cn.

PMID: 36623368
DOI: 10.1016/j.jcis.2023.01.011

Abstract

Overexploitation of nature by humans has led to an increasingly serious issue of heavy-metal water pollution. To reduce the threat of water pollution to humans and the environment, it is imperative to develop or improve the water treatment technology for heavy-metal-containing wastewater. Functionalized Fe₃O₄ magnetic nanoparticles (Fe₃O₄ MNPs) have been widely used as effective adsorbents for the removal of heavy-metal ions from water owing to their high efficiency, low cost, selective adsorption ability, and recyclability. In this study, Fe₃O₄@DA-DMSA magnetic nanoparticles (FDDMs) were prepared by the functionalization of Fe₃O₄ MNPs with environmentally friendly dopamine (DA) and a heavy-metal detoxifying agent such as 2,3-dimercaptosuccinic acid (DMSA) for the efficient and rapid adsorption of Pb²⁺, Cu²⁺, and Cd²⁺, with maximum adsorption capacities of 187.62, 63.01, and 49.46 mg/g, respectively. FDDMs exhibited the best ability to remove Pb²⁺ with a maximum adsorption capacity than that of the most reported Fe₃O₄ MNP-related adsorbents. In actual wastewater and multi-component simulated water samples contaminated with Pb²⁺, Cu²⁺, and Cd²⁺, the as-prepared adsorbent maintained a good removal ability for Pb²⁺ with low influence by ionic strength and interfering ions, as well as exhibited an excellent selectivity. According to the results of batch experiments and X-ray photoelectron spectroscopy (XPS) analysis of the adsorbent before and after adsorption, the adsorption mechanism of the adsorbent for the removal of heavy-metal ions mainly involves coordination and ion exchange. In addition, the adsorbent exhibited a good regeneration performance. Therefore, FDDMs can be considered as a promising adsorbent for the treatment of heavy-metal wastewater.

Keywords: Adsorption method; Bifunctionalization; Heavy-metal ions; Magnetic nanoadsorbent; Selectivity.