Translator Disclaimer
31 August 2014 Detection and degradation of organic contaminants in an agricultural soil amended with alkaline-treated biosolids
J. D. Gillis, G. W. Price, G. W. Stratton
Author Affiliations +
Abstract

Gillis, J. D., Price, G. W. and Stratton, G. W. 2014. Detection and degradation of organic contaminants in an agricultural soil amended with alkaline-treated biosolids. Can. J. Soil Sci. 94: 595-604. The agricultural use of wastewater biosolids is a common practice in many countries, but concerns exist regarding the presence of organic wastewater contaminants that remain in the land-applied biosolids. The objective of this study was to determine if contaminants present in biosolids are detectable in soil following land application. A suite of organic contaminants were monitored by gas chromatograph with mass spectrometer in agricultural soil samples from a site amended with increasing rates of alkaline-treated biosolids. Triclosan, a common antimicrobial agent, was detected at levels greater than the reporting limit in an environment-controlled incubation study and validated through in situ field samples from soils receiving the same alkaline-treated biosolid. A rapid decrease in triclosan concentration was observed during the first few weeks of the incubation study, with concentrations decreasing from 92±26 to 20±2 ng g-1 (average 78% decrease) after 4 mo. The field results indicate that triclosan in fall-applied may persist overwinter. However, a rapid decrease in triclosan concentration during the spring and summer months led to levels lower than predicted following the spring application, and levels below our reporting limit (up to 85% decrease) by the end of the study. Removal is posited to be through aerobic microbial degradation.

J. D. Gillis, G. W. Price, and G. W. Stratton "Detection and degradation of organic contaminants in an agricultural soil amended with alkaline-treated biosolids," Canadian Journal of Soil Science 94(5), 595-604, (31 August 2014). https://doi.org/10.1139/CJSS2013-123
Received: 20 December 2013; Accepted: 1 August 2014; Published: 31 August 2014
JOURNAL ARTICLE
10 PAGES


SHARE
ARTICLE IMPACT
RIGHTS & PERMISSIONS
Get copyright permission
Back to Top