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Environ Int. 2015 Dec;85:168-81. doi: 10.1016/j.envint.2015.09.017. Epub 2015 Sep 25.

Bioremediation of PAHs and VOCs: Advances in clay mineral-microbial interaction.

Author information

1
Future Industries Institute, University of South Australia, Mawson Lakes Campus, SA 5095, Australia; Cooperative Research Centre for Contamination Assessment and Remediation of the Environment, ATC Building, University of Newcastle, Callaghan, NSW, Australia. Electronic address: Bhabananda.Biswas@mymail.unisa.edu.au.
2
Future Industries Institute, University of South Australia, Mawson Lakes Campus, SA 5095, Australia; Cooperative Research Centre for Contamination Assessment and Remediation of the Environment, ATC Building, University of Newcastle, Callaghan, NSW, Australia. Electronic address: Binoy.Sarkar@unisa.edu.au.
3
Future Industries Institute, University of South Australia, Mawson Lakes Campus, SA 5095, Australia; Faculty of Applied Science, Universiti Teknologi MARA Negeri Sembilan, Kuala Pilah 72000, Malaysia.
4
Future Industries Institute, University of South Australia, Mawson Lakes Campus, SA 5095, Australia; Cooperative Research Centre for Contamination Assessment and Remediation of the Environment, ATC Building, University of Newcastle, Callaghan, NSW, Australia; Global Centre for Environmental Remediation, ATC Building, University of Newcastle, Callaghan, NSW, Australia. Electronic address: Ravi.Naidu@newcastle.edu.au.

Abstract

Bioremediation is an effective strategy for cleaning up organic contaminants, such as polycyclic aromatic hydrocarbons (PAHs) and volatile organic compounds (VOCs). Advanced bioremediation implies that biotic agents are more efficient in degrading the contaminants completely. Bioremediation by microbial degradation is often employed and to make this process efficient, natural and cost-effective materials can serve as supportive matrices. Clay/modified clay minerals are effective adsorbents of PAHs/VOCs, and readily available substrate and habitat for microorganisms in the natural soil and sediment. However, the mechanism underpinning clay-mediated biodegradation of organic compounds is often unclear, and this requires critical investigation. This review describes the role of clay/modified clay minerals in hydrocarbon bioremediation through interaction with microbial agents in specific scenarios. The vision is on a faster, more efficient and cost-effective bioremediation technique using clay-based products. This review also proposes future research directions in the field of clay modulated microbial degradation of hydrocarbons.

KEYWORDS:

Biodegradation; Clay and modified clay minerals; Clay-microbial interaction; PAHs and VOCs

PMID:
26408945
DOI:
10.1016/j.envint.2015.09.017
[Indexed for MEDLINE]

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