Temperature effects on arsenate adsorption onto goethite and its preliminary application to arsenate removal from simulative geothermal water

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	Temperature effects on arsenate adsorption onto goethite and its preliminary application to arsenate removal from simulative geothermal water
	Hao, Linli ; Ouyang, Tong ; Lai, Limin ; Liu, Yao-Xing ; Chen, Shanshan ; Hu, Hongyou ; Chang, Chang-Tang ; Wang, Juan-Juan ; Ou YT(欧阳通)
刊名	http://dx.doi.org/10.1039/c4ra08318k
	2014
关键词	Adsorption Experiments Iron compounds
英文摘要	Laboratory batch experiments were conducted in order to assess the impacts of temperature on the performance of goethite in removing arsenate from water. All batch experiments were conducted at four temperatures (30, 50, 70 and 90 °C) and pH 4.6. The results showed that both the arsenic uptake rate and capacity were significantly enhanced with increasing temperature from 30 to 90 °C. The adsorption kinetics followed a pseudo-second-order model with coefficients of determination (R2) all above 0.999. The process followed the Langmuir model, and several thermodynamic parameters were calculated. Arsenate adsorption was facilitated more under simulative geothermal water conditions than in RO (reverse osmosis) water. The crystalline structure of goethite was not changed after adsorption at various temperatures. XPS results showed a decrease in the content of iron hydroxyl groups, which demonstrated that arsenate adsorption onto goethite may be realised through the replacement of the iron hydroxyl group to form inner-sphere bidentate/monodentate complexes at pH 4.6. This journal is ? the Partner Organisations 2014.
语种	英语
出版者	Royal Society of Chemistry
内容类型	期刊论文
源URL	[http://dspace.xmu.edu.cn/handle/2288/88283]
专题	海洋环境－已发表论文
推荐引用方式 GB/T 7714	Hao, Linli,Ouyang, Tong,Lai, Limin,et al. Temperature effects on arsenate adsorption onto goethite and its preliminary application to arsenate removal from simulative geothermal water[J]. http://dx.doi.org/10.1039/c4ra08318k,2014.
APA	Hao, Linli.,Ouyang, Tong.,Lai, Limin.,Liu, Yao-Xing.,Chen, Shanshan.,...&欧阳通.(2014).Temperature effects on arsenate adsorption onto goethite and its preliminary application to arsenate removal from simulative geothermal water.http://dx.doi.org/10.1039/c4ra08318k.
MLA	Hao, Linli,et al."Temperature effects on arsenate adsorption onto goethite and its preliminary application to arsenate removal from simulative geothermal water".http://dx.doi.org/10.1039/c4ra08318k (2014).