Biosorption of aquatic Pb2+, Hg2+, and Cd2+ using a combined biosorbent—Aspergillus niger-Treated Rice Straw. Issue 4 (4th March 2018)

• Record Type: Journal Article
• Authors: Cui, Han; Li, Fangyuan; Ren, Binqiao; Xue, Chao; Cui, Chongwei; Wang, Jing-Yao
• Is Part Of: Separation science and technology. Volume 53:Issue 4(2018)
• Page Start: 626
• Page End: 635
• Publication Date: 2018-03-04
• Subjects: Biosorption -- fermentation technology -- heavy metal -- Aspergillus niger -- rice straw; Separation (Technology) -- Periodicals; 660.284205
• DOI: 10.1080/01496395.2017.1412463
• Languages: English
• ISSNs: 0149-6395

Abstract

ABSTRACT: The biosorbent used for removal of Pb 2+, Hg 2+, and Cd 2+ from aqueous solutions was rice straw fermented by Aspergillus niger (ARS), and raw rice straw (RRS) was used as a control. When inoculum size, material–water ratio, and temperature were 10 6, 100%, and 303K, respectively, the optimized spore number was 10 9 . The ARS exhibited a lager pore biosorption, which was better than RRS. The biosorption mechanism was involved in chelation with functional groups such as C-H, C = O, C-O, and C = C, and the biosorption data obtained were well described by the pseudo-second-order kinetic equation and the Freundlich isotherm model. GRAPHICAL ABSTRACT: