Influence of external factors on leaching of hexavalent chro1vewm from concrete waste

Yasuhiro Kuroda; Naoyuki Koshiishi

doi:10.3130/aijs.75.1803

Influence of external factors on leaching of hexavalent chro1vewm from concrete waste

Yasuhiro Kuroda, Naoyuki Koshiishi

School of Creative Science and Engineering

Research output: Contribution to journal › Article › peer-review

Abstract

In this paper, the influence of the external factors on the amount of hexavalent chromium Cr(VI) released from the concrete waste and the adsorption/reduction action caused by the surround soil, was investigated. The following results were obtained. 1. Serial batch test using mildly nitric acid solution is expected to be able to assess available amount for leaching under the general environment. 2. In case of the carbonation sample, the dissolution continued under the soaking condition, after the 91 days. 3. Blast-furnace slag fine aggregate and the powder reduced Cr(VI).4. Volcanic cohesive soil and organic soil have the capacity of absorption/reduction.

Original language	English
Pages (from-to)	1803-1808
Number of pages	6
Journal	Journal of Structural and Construction Engineering
Volume	75
Issue number	656
DOIs	https://doi.org/10.3130/aijs.75.1803
Publication status	Published - 2010 Oct

Keywords

Carbonation
Concrete waste
Hexavalent chromium
Hydrogen-ion concentration
Leaching test
Reduction

ASJC Scopus subject areas

Architecture
Building and Construction

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abstract = "In this paper, the influence of the external factors on the amount of hexavalent chromium Cr(VI) released from the concrete waste and the adsorption/reduction action caused by the surround soil, was investigated. The following results were obtained. 1. Serial batch test using mildly nitric acid solution is expected to be able to assess available amount for leaching under the general environment. 2. In case of the carbonation sample, the dissolution continued under the soaking condition, after the 91 days. 3. Blast-furnace slag fine aggregate and the powder reduced Cr(VI).4. Volcanic cohesive soil and organic soil have the capacity of absorption/reduction.",

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AB - In this paper, the influence of the external factors on the amount of hexavalent chromium Cr(VI) released from the concrete waste and the adsorption/reduction action caused by the surround soil, was investigated. The following results were obtained. 1. Serial batch test using mildly nitric acid solution is expected to be able to assess available amount for leaching under the general environment. 2. In case of the carbonation sample, the dissolution continued under the soaking condition, after the 91 days. 3. Blast-furnace slag fine aggregate and the powder reduced Cr(VI).4. Volcanic cohesive soil and organic soil have the capacity of absorption/reduction.

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