Remediation approaches for polycyclic aromatic hydrocarbons (PAHs) contaminated soils: Technological constraints, emerging trends and future directions

For more than a decade, the primary focus of environmental experts has been to adopt risk-based management approaches to cleanup PAH polluted sites that pose potentially destructive ecological consequences. This focus had led to the development of several physical, chemical, thermal and biological t...

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Vydáno v:	Chemosphere (Oxford) Ročník 168; s. 944 - 968
Hlavní autoři:	Kuppusamy, Saranya, Thavamani, Palanisami, Venkateswarlu, Kadiyala, Lee, Yong Bok, Naidu, Ravi, Megharaj, Mallavarapu
Médium:	Journal Article
Jazyk:	angličtina
Vydáno:	England Elsevier Ltd 01.02.2017
Témata:	bioaugmentation biocatalysts Biodegradation Biodegradation, Environmental bioreactors biosurfactants cell culture composting developmental stages environmental impact Environmental Restoration and Remediation - methods experts Field-scale remediation Future strategies genetically modified organisms Long-term contaminated soils molecular weight oxidation PAHs phytoremediation polluted soils polycyclic aromatic hydrocarbons Polycyclic Aromatic Hydrocarbons - analysis Polycyclic Aromatic Hydrocarbons - chemistry Polycyclic Aromatic Hydrocarbons - metabolism Risk Management Soil - chemistry Soil Pollutants - analysis soil washing solvents Treatment technologies Biodegradation Treatment technologies PAHs Long-term contaminated soils Field-scale remediation Future strategies
ISSN:	0045-6535, 1879-1298
On-line přístup:	Získat plný text
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Popis
Shrnutí:	For more than a decade, the primary focus of environmental experts has been to adopt risk-based management approaches to cleanup PAH polluted sites that pose potentially destructive ecological consequences. This focus had led to the development of several physical, chemical, thermal and biological technologies that are widely implementable. Established remedial options available for treating PAH contaminated soils are incineration, thermal conduction, solvent extraction/soil washing, chemical oxidation, bioaugmentation, biostimulation, phytoremediation, composting/biopiles and bioreactors. Integrating physico-chemical and biological technologies is also widely practiced for better cleanup of PAH contaminated soils. Electrokinetic remediation, vermiremediation and biocatalyst assisted remediation are still at the development stage. Though several treatment methods to remediate PAH polluted soils currently exist, a comprehensive overview of all the available remediation technologies to date is necessary so that the right technology for field-level success is chosen. The objective of this review is to provide a critical overview in this respect, focusing only on the treatment options available for field soils and ignoring the spiked ones. The authors also propose the development of novel multifunctional green and sustainable systems like mixed cell culture system, biosurfactant flushing, transgenic approaches and nanoremediation in order to overcome the existing soil- contaminant- and microbial-associated technological limitations in tackling high molecular weight PAHs. The ultimate objective is to ensure the successful remediation of long-term PAH contaminated soils. [Display omitted] •Summary of the extent and status of global PAHs contamination in soil.•Overview of established remediation approaches for PAHs and their costs.•Indication of emerging options for the cleanup of PAHs polluted sites.•Proposal of novel multifunctional green and sustainable cleanup systems for future.•Focus only on the treatment of field soils and not spiked soils.
Bibliografie:	ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-3 content type line 23 ObjectType-Review-1 ObjectType-Article-1 ObjectType-Feature-2
ISSN:	0045-6535 1879-1298
DOI:	10.1016/j.chemosphere.2016.10.115