Influence of moisture content and temperature on degree of carbonation and the effect on Cu and Cr leaching from incineration bottom ash
This study investigated the influence of moisture content and temperature on the degree of carbonation of municipal solid waste (MSW) incineration bottom ash (IBA) from two different incineration plants in Singapore. The initial rate of carbonation was affected by the nominal moisture content used....
| Main Authors: | , , , |
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| Format: | Journal Article |
| Language: | English |
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2015
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| Online Access: | https://hdl.handle.net/10356/106278 http://hdl.handle.net/10220/34628 |
| _version_ | 1811682575543959552 |
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| author | Lin, Wenlin Yvonne Heng, Kim Soon Sun, Xiaolong Wang, Jing-Yuan |
| author2 | School of Civil and Environmental Engineering |
| author_facet | School of Civil and Environmental Engineering Lin, Wenlin Yvonne Heng, Kim Soon Sun, Xiaolong Wang, Jing-Yuan |
| author_sort | Lin, Wenlin Yvonne |
| collection | NTU |
| description | This study investigated the influence of moisture content and temperature on the degree of carbonation of municipal solid waste (MSW) incineration bottom ash (IBA) from two different incineration plants in Singapore. The initial rate of carbonation was affected by the nominal moisture content used. Carbonation temperature seemed to play a part in changing the actual moisture content of IBA during carbonation, which in turn affected the degree of carbonation. Results showed that 2 h of carbonation was sufficient for the samples to reach a relatively high degree of carbonation that was close to the degree of carbonation observed after 1 week of carbonation. Both Cu and Cr leaching also showed significant reduction after only 2 h of carbonation. Therefore, the optimum moisture content and temperature were selected based on 2 h of carbonation. The optimum moisture content was 15% for both incineration plants while the optimum temperature was different for the two incineration plants, at 35 °C and 50 °C. The effect on Cu and Cr leaching from IBA after accelerated carbonation was evaluated as a function of carbonation time. Correlation coefficient, Pearson’s R, was used to determine the dominant leaching mechanism. The reduction in Cu leaching was found to be contributed by both formation of carbonate mineral and reduction of DOC leaching. On the other hand, Cr leaching seemed to be dominantly controlled by pH. |
| first_indexed | 2024-10-01T03:59:01Z |
| format | Journal Article |
| id | ntu-10356/106278 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T03:59:01Z |
| publishDate | 2015 |
| record_format | dspace |
| spelling | ntu-10356/1062782020-09-26T21:58:58Z Influence of moisture content and temperature on degree of carbonation and the effect on Cu and Cr leaching from incineration bottom ash Lin, Wenlin Yvonne Heng, Kim Soon Sun, Xiaolong Wang, Jing-Yuan School of Civil and Environmental Engineering Nanyang Environment and Water Research Institute DRNTU::Engineering::Environmental engineering::Waste management This study investigated the influence of moisture content and temperature on the degree of carbonation of municipal solid waste (MSW) incineration bottom ash (IBA) from two different incineration plants in Singapore. The initial rate of carbonation was affected by the nominal moisture content used. Carbonation temperature seemed to play a part in changing the actual moisture content of IBA during carbonation, which in turn affected the degree of carbonation. Results showed that 2 h of carbonation was sufficient for the samples to reach a relatively high degree of carbonation that was close to the degree of carbonation observed after 1 week of carbonation. Both Cu and Cr leaching also showed significant reduction after only 2 h of carbonation. Therefore, the optimum moisture content and temperature were selected based on 2 h of carbonation. The optimum moisture content was 15% for both incineration plants while the optimum temperature was different for the two incineration plants, at 35 °C and 50 °C. The effect on Cu and Cr leaching from IBA after accelerated carbonation was evaluated as a function of carbonation time. Correlation coefficient, Pearson’s R, was used to determine the dominant leaching mechanism. The reduction in Cu leaching was found to be contributed by both formation of carbonate mineral and reduction of DOC leaching. On the other hand, Cr leaching seemed to be dominantly controlled by pH. Accepted version 2015-07-13T03:55:55Z 2019-12-06T22:07:55Z 2015-07-13T03:55:55Z 2019-12-06T22:07:55Z 2015 2015 Journal Article Lin, W. Y., Heng, K. S., Sun, X., & Wang, J.-Y. (2015). Influence of moisture content and temperature on degree of carbonation and the effect on Cu and Cr leaching from incineration bottom ash. Waste management, in press. 0956-053X https://hdl.handle.net/10356/106278 http://hdl.handle.net/10220/34628 10.1016/j.wasman.2015.05.029 en Waste management © 2015 Elsevier. This is the author created version of a work that has been peer reviewed and accepted for publication by Waste Management, Elsevier. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [http://dx.doi.org/10.1016/j.wasman.2015.05.029]. 27 p. application/pdf |
| spellingShingle | DRNTU::Engineering::Environmental engineering::Waste management Lin, Wenlin Yvonne Heng, Kim Soon Sun, Xiaolong Wang, Jing-Yuan Influence of moisture content and temperature on degree of carbonation and the effect on Cu and Cr leaching from incineration bottom ash |
| title | Influence of moisture content and temperature on degree of carbonation and the effect on Cu and Cr leaching from incineration bottom ash |
| title_full | Influence of moisture content and temperature on degree of carbonation and the effect on Cu and Cr leaching from incineration bottom ash |
| title_fullStr | Influence of moisture content and temperature on degree of carbonation and the effect on Cu and Cr leaching from incineration bottom ash |
| title_full_unstemmed | Influence of moisture content and temperature on degree of carbonation and the effect on Cu and Cr leaching from incineration bottom ash |
| title_short | Influence of moisture content and temperature on degree of carbonation and the effect on Cu and Cr leaching from incineration bottom ash |
| title_sort | influence of moisture content and temperature on degree of carbonation and the effect on cu and cr leaching from incineration bottom ash |
| topic | DRNTU::Engineering::Environmental engineering::Waste management |
| url | https://hdl.handle.net/10356/106278 http://hdl.handle.net/10220/34628 |
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