| Title | Investigation of triclosan contamination on microbial biomass and other soil health indicators |
| Publication Type | Journal Article |
| Year of Publication | 2017 |
| Authors | Zaayman M., Siggins A., Horne D., Lowe H., Horswell J. |
| Journal | FEMS Microbiology Letters |
| Volume | 364 |
| Pagination | 6 |
| Date Published | Aug |
| Type of Article | Article |
| ISBN Number | 0378-1097 |
| Accession Number | WOS:000410352500006 |
| Keywords | degradation, environmental-impact, extraction method, grey water, greywater, hazardous substances, households, irrigation, metabolic quotient, microbial biomass, Microbiology, personal care products, reuse, soil, substrate-induced respiration, sulphatase, swedish, Triclosan |
| Abstract | Triclosan (TCS) is an antimicrobial compound found in personal care products, and consequently in greywater. After its release to the environment, it continues its antimicrobial action on indigenous microbial communities. Little is known about the environmental impacts of high levels of TCS, which may occur due to accumulation following long-term greywater application to soil. Soil microcosms were established using a silty clay loam and augmented with a range of TCS concentrations ranging from 500 to 7500 mg kg(-1). Samples were analysed for substrate-induced respiration, microbial biomass and sulphatase activity. The soil augmented with the lowest concentration of TCS (500 mg kg(-1)) significantly decreased microbial biomass, with a calculated EC20 of 195 mg kg(-1). Substrate-induced respiration indicated that the soil microbial community was impacted for all TCS concentrations; however, the community showed potential to recover over time. Sulphatase activity was less sensitive to TCS and was significantly impacted at high concentrations of TCS (>2500 mg kg(-1)). It is likely that TCS has selective toxicity for more susceptible microbes when introduced into the soil environment. At high levels, TCS could overwhelm TCS-degrading soil microbes.
|
| Short Title | FEMS Microbiol. Lett.FEMS Microbiol. Lett. |
| Alternate Journal | FEMS Microbiol. Lett. |
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Zaayman, Morkel Siggins, Alma Horne, Dave Lowe, Hamish Horswell, Jacqui
Institute of Environmental Science and Research, New Zealand
This work was supported by The Institute of Environmental Science and Research, New Zealand.
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Oxford univ press
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