Risk of environmental contamination arising from concrete structures, Part II: Toxic substance
- Authors
- Jung, M. S.; Hwang, J. P.; Kim, J. H.; Lee, C. K.; Ann, K. Y.
- Issue Date
- Dec-2014
- Publisher
- 대한토목학회
- Keywords
- hexavalent chromium; cement; spectrophotometer; immobilisation
- Citation
- KSCE Journal of Civil Engineering, v.19, no.6, pp.1591 - 1596
- Indexed
- SCIE
SCOPUS
KCI
- Journal Title
- KSCE Journal of Civil Engineering
- Volume
- 19
- Number
- 6
- Start Page
- 1591
- End Page
- 1596
- URI
- https://scholarworks.bwise.kr/erica/handle/2021.sw.erica/17409
- DOI
- 10.1007/s12205-014-0122-1
- ISSN
- 1226-7988
- Abstract
- The present study concerns the immobilisation of hexavalent chromium (Cr (VI)) ions in the cement matrix. Both the water-soluble and acid-soluble Cr (VI) ions in cement were measured using the spectrophotometer. As a result, the concentration of water-soluble Cr (VI) in cement ranged from 12.3 to 19.0 mg/kg-cem, and the dissolution of acid soluble Cr (VI) was strongly dependent on the pH of solvent, ranging from 172.4 to 318.2 mg/kg-cem. Simultaneously, the influence of cement hydration on the Cr (VI) solubility was investigated. After a cement hydration for 28 days, the water-soluble Cr (VI) was sharply decreased to about 2.0 mg/kg-cem, whilst no particular change in the acid-soluble Cr (VI) was observed. The reduction of water-soluble Cr (VI) may be attributed to a physical adorption of Cr (VI) ions in the cement matrix then to immobilise them, rather than chemical reaction with C(3)A or ettringite, being postulated in previous studies.
- Files in This Item
-
Go to Link
- Appears in
Collections - COLLEGE OF ENGINEERING SCIENCES > DEPARTMENT OF CIVIL AND ENVIRONMENTAL ENGINEERING > 1. Journal Articles
![qrcode](https://api.qrserver.com/v1/create-qr-code/?size=55x55&data=https://scholarworks.bwise.kr/erica/handle/2021.sw.erica/17409)
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.