Removal characteristics of As(III) and As(V) from acidic aqueous solution by steel making slag SCIE SCOPUS

Cited 82 time in WEB OF SCIENCE Cited 92 time in Scopus
Title
Removal characteristics of As(III) and As(V) from acidic aqueous solution by steel making slag
Author(s)
Oh, Chamteut; Rhee, Sungsu; Oh, Myounghak; Park, Junboum
KIOST Author(s)
Oh, Myoung Hak(오명학)
Publication Year
2012-04-30
Abstract
This study focused on the environmental risk of steel making slag itself, arsenic removal mechanism and re-leaching possibility of arsenic to aqueous state after the adsorption. The purpose of the study is to promote the use of steel making slag as a low-cost adsorbent for arsenic in aqueous system. Calcium was easily dissolved out from the slag and become the dominant substance in the leachate. Some of the calcium could form amorphous calcium carbonate in alkaline condition, and arsenic in the aqueous solution would be removed by being co-precipitated with or adsorbed onto the amorphous calcium carbonate. Most of the amorphous calcium carbonate containing arsenic would be bound to amorphous iron oxide of the slag. When the slag was used as an adsorbent for arsenic removal, a little amount of toxic chemicals were leached from the slag itself under pH 0.8 to 13.6. Also, 70-80% of arsenic laden on the slag was bound to amorphous iron oxide which would not easily desorb unless given a reducing and complexing condition. Showing 95-100% removal efficiency near initial pH 2, the slag, therefore, could be used as an appropriate adsorbent for eliminating arsenic in acidic aqueous solution. (C) 2012 Elsevier B.V. All rights reserved.
ISSN
0304-3894
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/3596
DOI
10.1016/j.jhazmat.2012.01.074
Bibliographic Citation
JOURNAL OF HAZARDOUS MATERIALS, v.213, pp.147 - 155, 2012
Publisher
ELSEVIER SCIENCE BV
Subject
CALCIUM-CARBONATE; ARSENIC REMOVAL; WASTE-WATER; EXTRACTION PROCEDURES; BY-PRODUCTS; SOILS; ADSORPTION; SPECIATION; SORPTION; PH
Keywords
Arsenic removal; Steel making slag; Adsorbent; Amorphous calcium carbonate; Co-precipitation
Type
Article
Language
English
Document Type
Article
Publisher
ELSEVIER SCIENCE BV
Related Researcher
Research Interests

Marine geotechnics,Geoenvironmental Engineering,offshore foundation,해양지반공학,지반환경공학,해양구조물 기초

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