Humic acid promotes arsenopyrite bio-oxidation and arsenic immobilization

• Published in: Journal of hazardous materials Vol. 384; p. 121359
• Main Authors: Zhang, Duo-rui, Chen, Hong-rui, Xia, Jin-lan, Nie, Zhen-yuan, Fan, Xiao-lu, Liu, Hong-chang, Zheng, Lei, Zhang, Li-juan, Yang, Hong-ying
• Format: Journal Article
• Language: English
• Published: Netherlands Elsevier B.V 15.02.2020
• Subjects: arsenates; Arsenates - analysis; Arsenates - metabolism; arsenic; Arsenic immobilization; Arsenicals - chemistry; Arsenicals - metabolism; Arsenites - analysis; Arsenites - metabolism; Arsenopyrite; Bio-oxidation; Biodegradation, Environmental; bioleaching; Clostridiales - metabolism; Ferric Compounds - chemistry; Humic acid; humic acids; Humic Substances - analysis; iron; Iron Compounds - chemistry; Iron Compounds - metabolism; Minerals - chemistry; Minerals - metabolism; Models, Theoretical; Oxidation-Reduction; Solubility; Speciation transformation; Sulfates - chemistry; Sulfides - chemistry; Sulfides - metabolism; Sulfobacillus thermosulfidooxidans; sulfur; Surface Properties; Speciation transformation; Bio-oxidation; Arsenic immobilization; Humic acid; Arsenopyrite

[Display omitted] •The effect of humic acid (HA) on bio-oxidation of FeAsS was first studied.•HA simultaneously promotes FeAsS dissolution and As immobilization.•The flocculent porous structure favors to FeAsS dissolution in the presence of HA.•A new way was provided for As immobilization in FeAsS b...