Red mud regulates arsenic fate at acidic pH via regulating arsenopyrite bio-oxidation and S, Fe, Al, Si speciation transformation

doi:10.1016/j.watres.2021.117539

	Red mud regulates arsenic fate at acidic pH via regulating arsenopyrite bio-oxidation and S, Fe, Al, Si speciation transformation
	Zhang, Duo-rui 1; Chen, Hong-rui 1; Xia, Jin-lan 1; Nie, Zhen-yuan 1; Zhang, Rui-yong 2; Schippers, Axel 3; Shu, Wen-sheng 4; Qian, Li-xiong 5
	2021-09-15
发表期刊	WATER RESEARCH
ISSN	0043-1354
卷号	203 页码:13
通讯作者	Xia, Jin-lan(jlxia@csu.edu.cn)
摘要	Red mud (RM) as waste of industrial aluminum production is piling up in huge ponds. RM could be a costeffective adsorbent for heavy metals, but adsorption is vulnerable to pH changes, metal ions speciation and the occurrence of iron bearing minerals. In this study, the precipitation and elemental speciation transformation relevant to arsenic fate in responding to the addition of RM during arsenopyrite bio-oxidation by Sulfobacillus thermosulfidooxidans was investigated. The results show that the addition of RM significantly changed the arsenic precipitation and the solution chemistry and thus affected the arsenopyrite bio-oxidation and arsenic fate. An addition of a small amount (<= 4 g/L) of RM substantially promoted arsenopyrite bio-oxidation with formation of SiO2 @ (As, Fe, Al, Si) spherical nanoparticles that can enhance the stability of the immobilized arsenic. The SiO2-based spherical nanoparticles precipitate was mainly composed of jarosites, amorphous ferric arsenate and crystalline scorodite, and its formation were controlled by Fe3+ concentration and solution pH. An addition of increased amount of RM (>= 6 g/L) resulted in a significant increase of the solution pH and a decrease in the Fe2+ bio-oxidation activity, and spherical nanoparticles were not formed. Consequently, the dissolution of arsenopyrite was inhibited and the release of arsenic was blocked. This study suggests the applicability of RM in mitigation of arsenic pollution from bio-oxidation of As-bearing sulfide minerals.
关键词	Arsenic Red mud Arsenopyrite Bio-oxidation Speciation transformation Immobilization
DOI	10.1016/j.watres.2021.117539
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[51861135305] ; National Natural Science Foundation of China[41830318] ; National Natural Science Foundation of China[51774342] ; Open Funds of Beijing Synchrotron Radiation Facility[2019-BEPC-PT-003348] ; Open Funds of Beijing Synchrotron Radiation Facility[2020-BEPC-ZD-000184] ; Open Funds of Shanghai Synchrotron Radiation Facility[2019-SSRF-PT-010938]
WOS研究方向	Engineering ; Environmental Sciences & Ecology ; Water Resources
WOS类目	Engineering, Environmental ; Environmental Sciences ; Water Resources
WOS记录号	WOS:000697759000001
出版者	PERGAMON-ELSEVIER SCIENCE LTD
引用统计	被引频次：12[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/176452
专题	海洋环境腐蚀与生物污损重点实验室
通讯作者	Xia, Jin-lan
作者单位	1.Cent South Univ, Sch Minerals Proc & Bioengn, Key Lab Biomet, Minist Educ China, Changsha 410083, Peoples R China 2.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Environm Corros & Biofouling, Qingdao 266071, Peoples R China 3.Fed Inst Geosci & Nat Resources, Stilleweg 2, D-30655 Hannover, Germany 4.South China Normal Univ, Sch Life Sci, Guangzhou 510631, Peoples R China 5.Chinese Acad Sci, Inst High Energy Phys, Beijing Synchrotron Radiat Facil, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Duo-rui,Chen, Hong-rui,Xia, Jin-lan,et al. Red mud regulates arsenic fate at acidic pH via regulating arsenopyrite bio-oxidation and S, Fe, Al, Si speciation transformation[J]. WATER RESEARCH,2021,203:13.
APA	Zhang, Duo-rui.,Chen, Hong-rui.,Xia, Jin-lan.,Nie, Zhen-yuan.,Zhang, Rui-yong.,...&Qian, Li-xiong.(2021).Red mud regulates arsenic fate at acidic pH via regulating arsenopyrite bio-oxidation and S, Fe, Al, Si speciation transformation.WATER RESEARCH,203,13.
MLA	Zhang, Duo-rui,et al."Red mud regulates arsenic fate at acidic pH via regulating arsenopyrite bio-oxidation and S, Fe, Al, Si speciation transformation".WATER RESEARCH 203(2021):13.

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