RECENT ADVANCES IN CONTAMINATED SOIL REMEDIATION TECHNOLOGY
Remediation is a process of cleaning up contaminated or polluted sites with a view of sanitizing the environment. Contaminated soil is very inimical to people, vegetation and animals. The aim of this paper is to look at recent advances and various remediation technologies for removing contaminants from soil contaminated or polluted by landfill leachates. The remediation technologies span biological treatment, physical/chemical treatment and thermal treatment. The biological technologies reviewed include phytoremediation, natural attenuation monitoring, land farming and bioventing. The physical and chemical technologies are soil vapour extraction, soil washing and soil flushing. This work also dwelled on thermal remediation as a mean of thermal treatment technology. It was revealed that no single remediation treatment technology may be adequate for cleaning up all types of contaminants in a soil contaminated by landfill leachates. Treatment technologies need to be combined in a process train for more effective remediation. The remediation of contaminated soil is not only important but urgent for the general well – being of the population and environmental integrity of soil resources.
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