Highly effective removal of nickel ions from wastewater by calcium-iron layered double hydroxide

Ning Li; Mingjie Yuan; Sheng Lu; Xiaoli Xiong; Zhigang Xie; Yongsheng Liu; Wei Guan

doi:10.3389/fchem.2022.1089690

Frontiers in Chemistry (Jan 2023)

Highly effective removal of nickel ions from wastewater by calcium-iron layered double hydroxide

Ning Li,
Mingjie Yuan,
Sheng Lu,
Xiaoli Xiong,
Zhigang Xie,
Yongsheng Liu,
Wei Guan

Affiliations

Ning Li: Department of Chemistry and Chemical Engineering, College of Environment and Resource, Chongqing Technology and Business University, Chongqing, China
Mingjie Yuan: Department of Chemistry and Chemical Engineering, College of Environment and Resource, Chongqing Technology and Business University, Chongqing, China
Sheng Lu: Department of Artificial Intelligence, Chongqing Technology and Business University, Chongqing, China
Xiaoli Xiong: Department of Chemistry and Chemical Engineering, College of Environment and Resource, Chongqing Technology and Business University, Chongqing, China
Zhigang Xie: Chongqing Key Laboratory of Environmental Materials and Remediation Technologies, Chongqing University of Arts and Sciences, Chongqing, China
Yongsheng Liu: Department of Chemistry and Chemical Engineering, College of Environment and Resource, Chongqing Technology and Business University, Chongqing, China
Wei Guan: Chongqing Key Laboratory of Environmental Materials and Remediation Technologies, Chongqing University of Arts and Sciences, Chongqing, China

DOI: https://doi.org/10.3389/fchem.2022.1089690
Journal volume & issue: Vol. 10

Abstract

Read online

Water pollution due to heavy metals has become a universal environmental problem. Ni(II) is a common heavy metal ion in polluted wastewater, which has high toxicity and carcinogenicity. In this study, the structure of a calcium-iron layered double hydroxide (Ca-Fe-LDHs) was synthesized and characterized by FTIR, XRD, SEM and XPS. Then, Ni(II) ion was effectively removed by Ca-Fe-LDHs and its mechanism for this materials was described. The maximum adsorption capacity of Ni(II) for Ca-Fe-LDHs was 418.9 mg‧g−1 when the initial concentration of Ni(II) was 1 g/L. The adsorption and removal of Ni(II) by Ca-Fe-LDHs was attributed to the action of hydroxyl groups on the hydrotalcite, generating surface capture. Ni(OH)2)0.75(H2O)0.16(NiCO3)0.09, Ni(OH)2, NiO, NiSO4 and other precipitates were generated on its surface. And a small amount of Ni-Fe-LDHs was generated through isomorphic transition before hydrolysis. Therefore, surface capture and isomorphic transition enhanced the removal efficiency of Ni(II) with Ca-Fe-LDHs, making Ca-Fe-LDHs as a potential material for effective removal of Ni(II).

Published in Frontiers in Chemistry

ISSN: 2296-2646 (Online)
Publisher: Frontiers Media S.A.
Country of publisher: Switzerland
LCC subjects: Science: Chemistry
Website: http://journal.frontiersin.org/journal/chemistry

About the journal

Abstract

Keywords