Arsenic Removal from Water Using Various Adsorbents: Magnetic Ion Exchange Resins, Hydrous Ion Oxide Particles, Granular Ferric Hydroxide, Activated Alumina, Sulfur Modified Iron, and Iron Oxide-Coated Microsand

Handle URI:
http://hdl.handle.net/10754/550820
Title:
Arsenic Removal from Water Using Various Adsorbents: Magnetic Ion Exchange Resins, Hydrous Ion Oxide Particles, Granular Ferric Hydroxide, Activated Alumina, Sulfur Modified Iron, and Iron Oxide-Coated Microsand
Authors:
Sinha, Shahnawaz; Amy, Gary L.; Yoon, Yeo-Min; Her, Nam-Guk
Abstract:
The equilibrium and kinetic adsorption of arsenic on six different adsorbents were investigated with one synthetic and four natural types (two surface and two ground) of water. The adsorbents tested included magnetic ion exchange resins (MIEX), hydrous ion oxide particles (HIOPs), granular ferric hydroxide (GFH), activated alumina (AA), sulfur modified iron (SMI), and iron oxide-coated mic - rosand (IOC-M), which have different physicochemical properties (shape, charge, surface area, size, and metal content). The results showed that adsorption equilibriums were achieved within a contact period of 20 min. The optimal doses of adsorbents determined for a given equilibrium concentration of C eq = 10 μg/L were 500 mg/L for AA and GFH, 520–1,300 mg/L for MIEX, 1,200 mg/L for HIOPs, 2,500 mg/L for SMI, and 7,500 mg/L for IOC-M at a contact time of 60 min. At these optimal doses, the rate constants of the adsorbents were 3.9, 2.6, 2.5, 1.9, 1.8, and 1.6 1/hr for HIOPs, AA, GFH, MIEX, SMI, and IOC-M, respectively. The presence of silicate significantly reduced the arsenic removal efficiency of HIOPs, AA, and GFH, presumably due to the decrease in chemical binding affinity of arsenic in the presence of silicate. Additional experiments with natural types of water showed that, with the exception of IOC-M, the adsorbents had lower adsorption capacities in ground water than with surface and deionized water, in which the adsorption capacities decreased by approximately 60–95 % .
KAUST Department:
Water Desalination and Reuse Research Center (WDRC)
Citation:
Arsenic Removal from Water Using Various Adsorbents: Magnetic Ion Exchange Resins, Hydrous Ion Oxide Particles, Granular Ferric Hydroxide, Activated Alumina, Sulfur Modified Iron, and Iron Oxide-Coated Microsand 2011, 16 (3):165 Environmental Engineering Research
Publisher:
Korean Society of Environmental Engineering
Journal:
Environmental Engineering Research
Issue Date:
30-Sep-2011
DOI:
10.4491/eer.2011.16.3.165
Type:
Article
ISSN:
1226-1025
Additional Links:
http://koreascience.or.kr/journal/view.jsp?kj=E1HGBK&py=2011&vnc=v16n3&sp=165
Appears in Collections:
Articles; Water Desalination and Reuse Research Center (WDRC)

Full metadata record

DC FieldValue Language
dc.contributor.authorSinha, Shahnawazen
dc.contributor.authorAmy, Gary L.en
dc.contributor.authorYoon, Yeo-Minen
dc.contributor.authorHer, Nam-Guken
dc.date.accessioned2015-04-28T12:15:23Zen
dc.date.available2015-04-28T12:15:23Zen
dc.date.issued2011-09-30en
dc.identifier.citationArsenic Removal from Water Using Various Adsorbents: Magnetic Ion Exchange Resins, Hydrous Ion Oxide Particles, Granular Ferric Hydroxide, Activated Alumina, Sulfur Modified Iron, and Iron Oxide-Coated Microsand 2011, 16 (3):165 Environmental Engineering Researchen
dc.identifier.issn1226-1025en
dc.identifier.doi10.4491/eer.2011.16.3.165en
dc.identifier.urihttp://hdl.handle.net/10754/550820en
dc.description.abstractThe equilibrium and kinetic adsorption of arsenic on six different adsorbents were investigated with one synthetic and four natural types (two surface and two ground) of water. The adsorbents tested included magnetic ion exchange resins (MIEX), hydrous ion oxide particles (HIOPs), granular ferric hydroxide (GFH), activated alumina (AA), sulfur modified iron (SMI), and iron oxide-coated mic - rosand (IOC-M), which have different physicochemical properties (shape, charge, surface area, size, and metal content). The results showed that adsorption equilibriums were achieved within a contact period of 20 min. The optimal doses of adsorbents determined for a given equilibrium concentration of C eq = 10 μg/L were 500 mg/L for AA and GFH, 520–1,300 mg/L for MIEX, 1,200 mg/L for HIOPs, 2,500 mg/L for SMI, and 7,500 mg/L for IOC-M at a contact time of 60 min. At these optimal doses, the rate constants of the adsorbents were 3.9, 2.6, 2.5, 1.9, 1.8, and 1.6 1/hr for HIOPs, AA, GFH, MIEX, SMI, and IOC-M, respectively. The presence of silicate significantly reduced the arsenic removal efficiency of HIOPs, AA, and GFH, presumably due to the decrease in chemical binding affinity of arsenic in the presence of silicate. Additional experiments with natural types of water showed that, with the exception of IOC-M, the adsorbents had lower adsorption capacities in ground water than with surface and deionized water, in which the adsorption capacities decreased by approximately 60–95 % .en
dc.publisherKorean Society of Environmental Engineeringen
dc.relation.urlhttp://koreascience.or.kr/journal/view.jsp?kj=E1HGBK&py=2011&vnc=v16n3&sp=165en
dc.rightsThis is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons. org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.en
dc.subjectAdsorbentsen
dc.subjectArsenic removaen
dc.subjectIon effecen
dc.subjectSorptionen
dc.subjectWater treatmenten
dc.titleArsenic Removal from Water Using Various Adsorbents: Magnetic Ion Exchange Resins, Hydrous Ion Oxide Particles, Granular Ferric Hydroxide, Activated Alumina, Sulfur Modified Iron, and Iron Oxide-Coated Microsanden
dc.typeArticleen
dc.contributor.departmentWater Desalination and Reuse Research Center (WDRC)en
dc.identifier.journalEnvironmental Engineering Researchen
dc.eprint.versionPublisher's Version/PDFen
dc.contributor.institutionDepartment of Civil and Environmental Engineering, University of South Carolina, Columbia, SC 29208, USAen
dc.contributor.institutionDepartment of Chemistry and Environmental Sciences, Korea Army Academy at Young-Cheon, Yeongcheon, Cyeongbuk, 770-849, South Koreaen
kaust.authorSinha, Shahnawazen
kaust.authorAmy, Gary L.en
All Items in KAUST are protected by copyright, with all rights reserved, unless otherwise indicated.