Arsenate and Arsenite Sorption Using Biogenic Iron Compounds: Treatment of Real Polluted Waters in Batch and Continuous Systems

doi:10.3390/met11101608

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	Arsenate and Arsenite Sorption Using Biogenic Iron Compounds: Treatment of Real Polluted Waters in Batch and Continuous Systems
	Castro, Laura 4,5; Ayala, Lesly Antonieta 4; Vardanyan, Arevik 3; Zhang, Ruiyong 1,2; Angel Munoz, Jesus 4
刊名	METALS
	2021-10-01
卷号	11 期号:10 页码:15
关键词	arsenic biogenic iron compounds adsorption alginate beads water treatment
DOI	10.3390/met11101608
通讯作者	Castro, Laura(laura.castro@urjc.es)
英文摘要	Arsenic pollution in waters is due to natural and anthropogenic sources. Human exposure to arsenic is associated with acute health problems in areas with high concentrations of this element. Nanometric iron compounds with large specific surface areas and higher binding energy produced by some anaerobic microorganisms are thus expected to be more efficient adsorbents for the removal of harmful metals and metalloids than chemically produced iron oxides. In this study, a natural consortium from an abandoned mine site containing mainly Clostridium species was used to biosynthesize solid Fe(II) compounds, siderite (FeCO3) and iron oxides. Biogenic precipitates were used as adsorbents in contact with solutions containing arsenate and arsenite. The adsorption of As(V) fitted to the Langmuir model (q(max) = 0.64 mmol/g, K-L = 0.019 mmol/L) at the optimal pH value (pH 2), while the As(III) adsorption mechanism was better represented by the Freundlich model (K-F = 0.476 L/g, n = 2.13) at pH 10. Water samples from the Caracarani River (Chile) with high contents of arsenic and zinc were treated with a biogenic precipitate encapsulated in alginate beads in continuous systems. The optimal operation conditions were low feed flow rate and the up-flow system, which significantly improved the contaminant uptake. This study demonstrates the feasibility of the application of biogenic iron compounds in the treatment of polluted waters.
资助项目	Spanish Ministry of Economy and Competitiveness[MAT2014-59222R]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	MDPI
WOS记录号	WOS:000747144700001
内容类型	期刊论文
源URL	[http://ir.qdio.ac.cn/handle/337002/177901]
专题	海洋研究所_海洋腐蚀与防护研究发展中心
通讯作者	Castro, Laura
作者单位	1.Pilot Natl Lab Marine Sci & Technol Qingdao, Open Studio Marine Corros & Protect, Qingdao 266237, Peoples R China 2.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Environm Corros & Biofouling, Qingdao 266071, Peoples R China 3.Natl Acad Sci Armenia, Dept Microbiol, SPC Armbiotechnol, Yerevan 0056, Armenia 4.Univ Complutense Madrid, Dept Chem & Mat Engn, Madrid 28040, Spain 5.Rey Juan Carlos Univ, Sch Expt Sci & Technol, Dept Appl Math Mat Sci & Engn & Elect Technol, Mostoles 28935, Spain
推荐引用方式 GB/T 7714	Castro, Laura,Ayala, Lesly Antonieta,Vardanyan, Arevik,et al. Arsenate and Arsenite Sorption Using Biogenic Iron Compounds: Treatment of Real Polluted Waters in Batch and Continuous Systems[J]. METALS,2021,11(10):15.
APA	Castro, Laura,Ayala, Lesly Antonieta,Vardanyan, Arevik,Zhang, Ruiyong,&Angel Munoz, Jesus.(2021).Arsenate and Arsenite Sorption Using Biogenic Iron Compounds: Treatment of Real Polluted Waters in Batch and Continuous Systems.METALS,11(10),15.
MLA	Castro, Laura,et al."Arsenate and Arsenite Sorption Using Biogenic Iron Compounds: Treatment of Real Polluted Waters in Batch and Continuous Systems".METALS 11.10(2021):15.