Adsorption properties of Pb2+ on thermal-activated serpentine. Issue 18 (12th December 2019)

• Record Type: Journal Article
• Authors: Cao, Chun-Yan; Yu, Bing; Wang, Ming; Zhao, Ying-Ying; Zhao, Yong-Hua
• Is Part Of: Separation science and technology. Volume 54:Issue 18(2019)
• Page Start: 3037
• Page End: 3045
• Publication Date: 2019-12-12
• Subjects: Serpentine -- thermal activation -- Pb2+ -- heavy metal -- adsorption; Separation (Technology) -- Periodicals; 660.284205
• DOI: 10.1080/01496395.2019.1565776
• Languages: English
• ISSNs: 0149-6395

Abstract

ABSTRACT: Adsorption properties of nature and thermal-activated serpentines to Pb 2+ in aqueous solution were investigated. The results showed that Freundlich isotherm and pseudo-second-order kinetics model were suitable to describe the adsorption process of Pb 2+ on serpentines. The thermodynamic parameters indicated that the adsorption process was endothermic and spontaneous. The serpentine activated at 700°C exhibited maximum adsorption capacity to Pb 2+ . Based on the XRD and XPS characterization, it could be found that the structure of serpentine did not change significantly during the adsorption process, and Pb 2+ was adsorbed on the serpentine surface as the precipitation of Pb(OH)Cl and Pb(OH)2 .