Facile preparation of polyethyleneimine modified activated sludge-based adsorbent for hexavalent chromium removal from aqueous solution. Issue 3 (11th February 2021)

• Record Type: Journal Article
• Authors: Wang, Jiahong; Cao, Ruihua; He, Dengji; Saleem, Atif
• Is Part Of: Separation science and technology. Volume 56:Issue 3(2021)
• Page Start: 498
• Page End: 506
• Publication Date: 2021-02-11
• Subjects: Polyethyleneimine modified activated sludge -- adsorption -- hexavalent chromium; Separation (Technology) -- Periodicals; 660.284205
• DOI: 10.1080/01496395.2020.1728324
• Languages: English
• ISSNs: 0149-6395

Abstract

ABSTRACT: Polyethyleneimine modified activated sludge (AS-PEI) was prepared and used for the removal of Cr(VI) in wastewater. Characterized results exhibited that PEI was successfully anchored on the surface of activated sludge. At 25 ºC and pH = 5.0, the maximum adsorption amount of Cr(VI) on AS-PEI was 86.96 mg/g. The adsorption amount of AS-PEI for Cr(VI) decreased as the pH values increased. The existence of Cl-, SO4 2- and PO4 3- decreased the Cr(VI) adsorption, and HA enhances the Cr(VI) adsorption. The electrostatic interaction combined reduction was the main mechanism of Cr(VI) adsorption. Cr(VI) loaded adsorbent can be regenerated in alkaline solution and AS-PEI can be reused.