Remediation of antimony-contaminated tap water using granular TiO(2)column

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 环境化学与生态毒理学国家重点实验室

	Remediation of antimony-contaminated tap water using granular TiO(2)column
	Jiang, Yuxuan; Yan, Li; Nie, Xiao; Yan, Wei
刊名	ENVIRONMENTAL CHEMISTRY
	2020-01
卷号	17 期号:4 页码:323-331
ISSN号	1448-2517
英文摘要	Environmental context Antimony (Sb) contamination from mining is an emergent environmental issue, and there is an urgent need for the development of effective water treatment technology. This study reports a complete Sb remediation strategy using granular titanium dioxide as the adsorbent, and describes adsorbent manufacture, Sb adsorptive removal and regeneration of the adsorbent. The findings highlight a practical way for on-site remediation of Sb-contaminated water. Antimony (Sb) mining endorses the development of Sb remediation technology to reduce its contamination level and protect public health. In this study, a treatment process based on granular TiO(2)was proposed to remediate the Sb-contaminated tap water at mining sites. The Langmuir isotherms indicated that the maximum adsorption capacity on granular TiO(2)was 142 mg g(-1)for Sb(III)and 43 mg g(-1)for Sb-V. The kinetics results suggested that Sb adsorption conformed to the Weber-Morris intraparticle diffusion model. The adsorption of Sb(V)featured the anionic adsorption characteristics, which were significantly inhibited at pH > 8. Approximately, 586 bed volumes of tap water with an average Sb(V)concentration of 324 mu g L(-1)were filtered before the effluent concentration exceeded 6 mu g L(-1)using a granular TiO(2)column. ThePHREEQCprogram integrated with charge distribution multi-site complexation (CD-MUSIC) modelling and a one-dimensional transport block was performed to predict the Sb(V)breakthrough curve. The results revealed that the existence of Ca(2+)significantly promoted Sb(V)adsorption. Furthermore, the breakthrough curves of Sb(V)and Ca(2+)were well simulated after considering the effects of Ca(2+)adsorption and the Ca-Sb-TiO(2)ternary surface complex. Granular TiO(2)can be regenerated and reused, and the solid residue from regeneration can be recycled. The insights of this study help to further understand the environmental chemistry of Sb on metal oxides, which provides a practical solution for Sb removal.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/44795]
专题	生态环境研究中心_环境化学与生态毒理学国家重点实验室
推荐引用方式 GB/T 7714	Jiang, Yuxuan,Yan, Li,Nie, Xiao,et al. Remediation of antimony-contaminated tap water using granular TiO(2)column[J]. ENVIRONMENTAL CHEMISTRY,2020,17(4):323-331.
APA	Jiang, Yuxuan,Yan, Li,Nie, Xiao,&Yan, Wei.(2020).Remediation of antimony-contaminated tap water using granular TiO(2)column.ENVIRONMENTAL CHEMISTRY,17(4),323-331.
MLA	Jiang, Yuxuan,et al."Remediation of antimony-contaminated tap water using granular TiO(2)column".ENVIRONMENTAL CHEMISTRY 17.4(2020):323-331.