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Evaluation of metal oxides and activated carbon for lead removal: Kinetics, isotherms, column tests, and the role of co-existing ions
Shi, Qiantao1; Terracciano, Amalia1; Zhao, Ying1,2; Wei, Chaoyang1,3; Christodoulatos, Christos1; Meng, Xiaoguang1
2019-01-15
Source PublicationSCIENCE OF THE TOTAL ENVIRONMENT
ISSN0048-9697
Volume648Pages:176-183
Corresponding AuthorMeng, Xiaoguang(xmeng@stevens.edu)
AbstractActivated carbon (AC) is commonly used in faucet and pitcher filters for lead (Pb(II)) removal in homes. This study evaluated the Pb(II) removal performance of AC and metal oxides (e.g. Fe(OH)(3) and TiO2), as well as the co-existing ions' effect on Pb(II) removal. Results showed that metal oxides had higher adsorption capacity (28.9-51.5 mg/g) than AC (212 mg/g).Pb(II) was inner-spherically adsorbed onto both AC and metal oxides surfaces. Among various metal ions, calcium (Ca(II)) demonstrated dramatic effects on Pb(II) removal ability of AC, while it had no effect on Pb( II) adsorption by metal oxides. This difference resulted from the inner- and outer- sphere adsorption of Ca(II) on AC and metal oxides, respectively. The presence of orthophosphate (orth-P) and sulfate enhanced Pb(II) removal by those three adsorbents, whereas carbonate and silicate had negligible effect on Pb( II) adsorption. Interestingly. while the orth-P was usually used as corrosion inhibitor because of the formation of lead-phosphate coprecipitate, we found that the enhanced effect of orth-P on Pb(H) removal was mainly due to the synergistic adsorption. This study provides valuable information for the selection of effective adsorbents for Pb(II) removal and is helpful for understanding the roles of co-existing ions on it. (C) 2018 Elsevier B.V. All rights reserved.
KeywordLead Adsorption Activated carbon Metal oxides Co-existing ions
DOI10.1016/j.scitotenv.2018.08.013
WOS KeywordAQUEOUS-SOLUTIONS ; WASTE-WATER ; DRINKING-WATER ; ADSORPTION ; PB(II) ; GOETHITE ; SORPTION ; PHOSPHATE ; COPPER(II) ; SOLUBILITY
Indexed BySCI
Language英语
WOS Research AreaEnvironmental Sciences & Ecology
WOS SubjectEnvironmental Sciences
WOS IDWOS:000447805500018
PublisherELSEVIER SCIENCE BV
Citation statistics
Cited Times:10[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/52686
Collection中国科学院地理科学与资源研究所
Corresponding AuthorMeng, Xiaoguang
Affiliation1.Stevens Inst Technol, Ctr Environm Syst, Hoboken, NJ 07030 USA
2.Chinese Res Inst Environm Sci, State Key Lab Environm Criteria & Risk Assessment, Beijing 100012, Peoples R China
3.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China
Recommended Citation
GB/T 7714
Shi, Qiantao,Terracciano, Amalia,Zhao, Ying,et al. Evaluation of metal oxides and activated carbon for lead removal: Kinetics, isotherms, column tests, and the role of co-existing ions[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2019,648:176-183.
APA Shi, Qiantao,Terracciano, Amalia,Zhao, Ying,Wei, Chaoyang,Christodoulatos, Christos,&Meng, Xiaoguang.(2019).Evaluation of metal oxides and activated carbon for lead removal: Kinetics, isotherms, column tests, and the role of co-existing ions.SCIENCE OF THE TOTAL ENVIRONMENT,648,176-183.
MLA Shi, Qiantao,et al."Evaluation of metal oxides and activated carbon for lead removal: Kinetics, isotherms, column tests, and the role of co-existing ions".SCIENCE OF THE TOTAL ENVIRONMENT 648(2019):176-183.
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