Removal of Cl(- I) from strongly acidic wastewater using NaBiO3: A process of simultaneous oxidation and precipitation

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 环境水质学国家重点实验室

	Removal of Cl(- I) from strongly acidic wastewater using NaBiO3: A process of simultaneous oxidation and precipitation
	Dou, Wenyue; Hu, Xingyun; Kong, Linghao; Peng, Xianjia; Wang, Xianliang
刊名	DESALINATION
	2020-10-01
卷号	491 页码:1-9
关键词	Strongly acidic wastewater Cl(- I) removal Cl center dot radicals NaBiO3 regeneration
ISSN号	0011-9164
英文摘要	It was proposed to recycle strongly acidic wastewater generated from nonferrous smelting industries as diluted sulfuric acid after the contaminants being removed, however, Cl(- I) removal from strongly acidic wastewater remains a difficulty. In this work, a process of simultaneous oxidation and precipitation using NaBiO3 for Cl(- I) removal from strongly acidic wastewater was proposed, and 98.1% of Cl(- I) was efficiently removed at the stoichiometric NaBiO(3)dosage under 30 degrees C. The mechanism exploration indicated that Cl(- I) was removed in two ways. In the first way, Cl(- I) was oxidized to generate Cl-2: (1) NaBiO3 was dissolved, and the produced BiO3- oxidized Cl(- I) and OH- to Cl center dot and center dot OH, respectively; (2) center dot OH oxidized Cl(- I) to generate Cl-; and (3) Cl center dot combined to produce Cl-2. In the second way, Be3+, the reduced product of BiO3-, reacted with H2O and Cl (- I) to produce BiOCl precipitates. Additionally, through treatment by the NaOH absorption solution for Cl-2, almost all of BiOCl product was transformed to the regenerated NaBiO3, which was further employed in Cl(- I) removal. Finally, Cl( -I) was transferred from wastewater to the NaOH/NaCl1 concentrate. This study offered a theoretical foundation for the development of the method to remove Cl(- I) through oxidation.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/44987]
专题	生态环境研究中心_环境水质学国家重点实验室
推荐引用方式 GB/T 7714	Dou, Wenyue,Hu, Xingyun,Kong, Linghao,et al. Removal of Cl(- I) from strongly acidic wastewater using NaBiO3: A process of simultaneous oxidation and precipitation[J]. DESALINATION,2020,491:1-9.
APA	Dou, Wenyue,Hu, Xingyun,Kong, Linghao,Peng, Xianjia,&Wang, Xianliang.(2020).Removal of Cl(- I) from strongly acidic wastewater using NaBiO3: A process of simultaneous oxidation and precipitation.DESALINATION,491,1-9.
MLA	Dou, Wenyue,et al."Removal of Cl(- I) from strongly acidic wastewater using NaBiO3: A process of simultaneous oxidation and precipitation".DESALINATION 491(2020):1-9.