| Literature DB >> 30827022 |
Shifeng Li1,2, Yang Guo3, Min Xiao4, Tan Zhang3, Shuhua Yao3, Shuyan Zang3, Hongtao Fan5, Yanming Shen3, Zhigang Zhang3, Wenxiu Li3.
Abstract
In this study, Mn-doped MgAl-layered double hydroxides (LDHs) were successfully synthesized for efficient removal arsenate from aqueous solution. The structure and composition of Mn-doped MgAl-LDHs intercalated by different ions such as CO32-, Cl-, or NO3- were investigated. The characterizations of XRD, ATR FT-IR, SEM, TG-DTA, and N2 adsorption-desorption presented that the Mn-doped MgAl-LDHs (donated as Mn-LDHs) have very similar physical morphologies and properties to the MgAl-Cl-LDHs (donated as Mg-LDHs). However, the Mn-LDHs exhibits more preferable arsenate adsorption than Mg-LDHs. The As(V) removal kinetics data of Mn-LDHs is followed pseudo-second-order expression. The adsorption capacity of As(V) on Mn-LDHs via Langmuir isotherm model was 166.94 mg g-1. The results of XPS revealed that the enhanced removal mechanism can be attributed to surface complexation of As(V) with Mn on the surface of Mn-LDHs. These results prove that Mn-doped LDHs can be considered as a potential material for adsorption As(V) from wastewater.Entities:
Keywords: Adsorption; Arsenate; Doped; Layered double hydroxides; Manganese; Surface complexation
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Year: 2019 PMID： 30827022 DOI： 10.1007/s11356-019-04667-4
Source DB: PubMed Journal: Environ Sci Pollut Res Int ISSN： 0944-1344 Impact factor: 4.223