Jiang, Chunxiao and Li, Huashou and Lin, Chuxia (2009) Effects of activated sludge on the degradation of chlorate in soils under varying environmental conditions. Journal of Hazardous Materials, 162 (2-3). pp. 1053-1058. ISSN 0304-3894
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Official URL: http://dx.doi.org/10.1016/j.jhazmat.2008.05.159
Identification Number or DOI: doi: 10.1016/j.jhazmat.2008.05.159
Incubation experiments were conducted to examine the effects of activated sludge on degradation of chlorate in soils. The results show that application of activated sludge could significantly promote the decomposition of soil chlorate though the degradation rate of chlorate did not necessarily increase with increasing application rate of the sludge. The effectiveness of activated sludge on soil chlorate degradation was significantly affected by temperature, moisture content and pH. There is a tendency that the rate of chlorate decomposition increased with increasing temperature and moisture content until optimal values of temperature and moisture content were reached. This can be attributed to the enhanced activity of chlorate-reducing microorganisms in hot and more reducing soil conditions. Soil pH also had important controls on the decomposition of chlorate. The experimental results demonstrate that neutral pH more favoured the degradation of soil chlorate, compared to either acidic or alkaline pH. While soil organic matter content could affect chlorate decomposition, its impact on the effectiveness of activated sludge on chlorate degradation was minor. This study has implications for developing cost-effective techniques for remediating chlorate-contaminated soils, particularly in the longan-producing countries.
|Item Type:||Article (Commonwealth Reporting Category C)|
|Additional Information:||Permanent restricted access to published version due to publisher copyright policy.|
|Uncontrolled Keywords:||activated sludge; biodegradation; chlorate; longan plantation; remediation technique; soil|
|Fields of Research (FOR2008):||10 Technology > 1002 Environmental Biotechnology > 100203 Bioremediation|
03 Chemical Sciences > 0399 Other Chemical Sciences > 039901 Environmental Chemistry (incl. Atmospheric Chemistry)
05 Environmental Sciences > 0503 Soil Sciences > 050302 Land Capability and Soil Degradation
|Socio-Economic Objective (SEO2008):||D Environment > 96 Environment > 9614 Soils > 961499 Soils not elsewhere classified|
|Deposited On:||01 Jul 2011 21:09|
|Last Modified:||07 Aug 2012 10:21|
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