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Microbial activity and diversity in long-term mixed contaminated soils with respect to polyaromatic hydrocarbons and heavy metals.(Report)

Thavamani, Palanisami ; Malik, Seidu ; Beer, Michael ; Megharaj, Mallavarapu ; Naidu, Ravi

Journal of Environmental Management, May 30, 2012, Vol.99, p.10(8) [Tạp chí có phản biện]

ISSN: 0301-4797

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  • Nhan đề:
    Microbial activity and diversity in long-term mixed contaminated soils with respect to polyaromatic hydrocarbons and heavy metals.(Report)
  • Tác giả: Thavamani, Palanisami ; Malik, Seidu ; Beer, Michael ; Megharaj, Mallavarapu ; Naidu, Ravi
  • Chủ đề: Soils -- Analysis ; Soil Microbiology -- Analysis ; Enzymes -- Analysis ; Bioremediation -- Analysis ; Heavy Metals -- Analysis ; Environmental Management -- Analysis ; Gas Power Plants -- Analysis ; Metals (Materials) -- Analysis ; Polycyclic Aromatic Hydrocarbons -- Analysis ; Pollutants -- Analysis
  • Là 1 phần của: Journal of Environmental Management, May 30, 2012, Vol.99, p.10(8)
  • Mô tả: To link to full-text access for this article, visit this link: http://dx.doi.org/10.1016/j.jenvman.2011.12.030 Byline: Palanisami Thavamani (a)(b), Seidu Malik (a)(b), Michael Beer (a)(b), Mallavarapu Megharaj (a)(b), Ravi Naidu (a)(b) Abstract: The co-occurrence of polyaromatic hydrocarbons (PAHs) with heavy metals and their effect on soil microbial activity have not been systematically investigated. In this study a holistic approach was employed by combining physico-chemical, biological and advanced molecular methods to determine the soil microbial activities of long-term mixed contaminated soils collected from a former manufactured gas plant (MGP) site. Concentrations of PAHs in MGP soils ranged from 335 to 8645mg/kg. Of the potentially toxic metals, concentrations of lead were found to be highest, ranging from 88 to 671mg/kg, cadmium 8 to 112mg/kg, while zinc varied from 64 to 488mg/kg. The enzyme activities were severely inhibited in soils that were contaminated with both PAHs and heavy metals. The presence of heavy metals in PAH-contaminated soils not only reduced the diversity of microbial population but also showed a few distinctive species by exerting selective pressure. The multivariate analysis revealed that there is an association between PAHs and heavy metals which influenced biological properties in mixed contaminated soils. The findings of this study have major implications for the bioremediation of organic pollutants in metal-organic mixed contaminated sites. Author Affiliation: (a) Centre for Environmental Risk Assessment and Remediation (CERAR), University of South Australia, Mawson Lakes, SA, Australia (b) Cooperative Research Centre for Contamination Assessment and Remediation of the Environment (CRC CARE), Mawson Lakes, SA, Australia Article History: Received 11 April 2011; Revised 26 December 2011; Accepted 28 December 2011
  • Ngôn ngữ: English
  • Số nhận dạng: ISSN: 0301-4797

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