Fe(II) bio-oxidation mediates red mud transformations to form Fe(III)/Al (hydr)oxide adsorbent for efficient As(V) removal under acidic conditions

doi:10.1016/j.cej.2022.135753

	Fe(II) bio-oxidation mediates red mud transformations to form Fe(III)/Al (hydr)oxide adsorbent for efficient As(V) removal under acidic conditions
	Zhang, Duo-Rui 1; Chen, Hong-Rui 1; Zhao, Xiao-Juan 2; Xia, Jin-Lan 1; Nie, Zhen-yuan 1; Zhang, Rui-yong 3,4; Shu, Wen-Sheng 5; Pakostova, Eva 6
	2022-07-01
发表期刊	CHEMICAL ENGINEERING JOURNAL
ISSN	1385-8947
卷号	439 页码:14
通讯作者	Xia, Jin-Lan(jlxia@csu.edu.cn)
摘要	Acidic wastewater rich in arsenic (As) is one of the most hazardous types of liquid waste and has caused severe environmental pollution over the past few decades due to a lack of cost-effective and environment-friendly disposal technologies. Here, a new strategy for the efficient immobilization of As(V) under acidic conditions is presented. The approach uses Fe(II) bio-oxidation by the acidophilic bacterium Sulfobacillus (Sb.) thermosulfidooxidans to transform red mud into a low-cost Fe(III)/Al (hydr)oxide adsorbent for As(V) removal. The mechanisms of the formation of the adsorbent and subsequent adsorption of As onto its surface were investigated, together with the relationship between the adsorbent structure and As adsorption efficiency. The [Fe (II)]ini greatly affected the growth of Sb. thermosulfidooxidans, Fe/Al speciation, and surface structure of the adsorbent, as well as the As removal capacity. The aluminosilicates in RM provided numerous sites for Fe(III) adsorption, inhibiting the transformation of amorphous Fe(III) (hydr)oxides to crystalline Fe(III) minerals. The newly formed Fe(OH)(3) and schwertmannite played a dominant role in As(V) immobilization. The transformation of the amorphous Fe(III) (hydr)oxides to more crystalline Fe(III) minerals, caused by an excess of Fe(II) (2 <= [Fe (II)]ini <= 4 g/L), resulted in a significant decrease in the As adsorption capacity (reduce ratio: 29.3-53.5%). The Fe(III)/Al (hydr)oxide adsorbent bio-synthesized under [Fe(II)]ini of 1 g/L showed the highest As(V) adsorption efficiency (89.9 mg/g; at pH 2.0), which was significantly higher than that of the original RM under the same conditions (5.7 mg/g). The adsorption process followed the pseudo-second-order kinetic and Langmuir isotherm models.
关键词	Arsenic removal Iron oxidation Red mud Fe(III) Al (hydr)oxides Iron speciation transformation
DOI	10.1016/j.cej.2022.135753
收录类别	SCI
语种	英语
资助项目	National Natural Science of China[51861135305] ; National Natural Science of China[41830318] ; Open Funds of Beijing Synchrotron Radiation Facility[2019-BEPC-PT-003348]
WOS研究方向	Engineering
WOS类目	Engineering, Environmental ; Engineering, Chemical
WOS记录号	WOS:000783179900001
出版者	ELSEVIER SCIENCE SA
引用统计	被引频次：13[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/337002/178973
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, Beijing Synchrotron Radiat Facil, Inst High Energy Phys, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Environm Corros & Biofouling, Qingdao 266071, Peoples R China 4.Pilot Natl Lab Marine Sci & Technol Qingdao, Open Studio Marine Corros & Protect, Qingdao 266237, Peoples R China 5.South China Normal Univ, Sch Life Sci, Guangzhou 510631, Peoples R China 6.Coventry Univ, Ctr Sport Exercise & Life Sci, Coventry CV1 5FB, W Midlands, England
推荐引用方式 GB/T 7714	Zhang, Duo-Rui,Chen, Hong-Rui,Zhao, Xiao-Juan,et al. Fe(II) bio-oxidation mediates red mud transformations to form Fe(III)/Al (hydr)oxide adsorbent for efficient As(V) removal under acidic conditions[J]. CHEMICAL ENGINEERING JOURNAL,2022,439:14.
APA	Zhang, Duo-Rui.,Chen, Hong-Rui.,Zhao, Xiao-Juan.,Xia, Jin-Lan.,Nie, Zhen-yuan.,...&Pakostova, Eva.(2022).Fe(II) bio-oxidation mediates red mud transformations to form Fe(III)/Al (hydr)oxide adsorbent for efficient As(V) removal under acidic conditions.CHEMICAL ENGINEERING JOURNAL,439,14.
MLA	Zhang, Duo-Rui,et al."Fe(II) bio-oxidation mediates red mud transformations to form Fe(III)/Al (hydr)oxide adsorbent for efficient As(V) removal under acidic conditions".CHEMICAL ENGINEERING JOURNAL 439(2022):14.

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