Abstract
The amount of organochlorine pesticides in soil and water continues to increase; their presence has surpassed maximum acceptable concentrations. Thus, the development of different removal strategies has stimulated a new research drive in environmental remediation. Different techniques such as adsorption, bioremediation, phytoremediation and ozonation have been explored. These techniques aim at either degrading or removal of the organochlorine pesticides from the environment but have different drawbacks. Heterogeneous photocatalysis is a relatively new technique that has become popular due to its ability to completely degrade different toxic pollutants—instead of transferring them from one medium to another. The process is driven by a renewable energy source, and semiconductor nanomaterials are used to construct the light energy harvesting assemblies due to their rich surface states, large surface areas and different morphologies compared to their corresponding bulk materials. These make it a green alternative that is cost-effective for organochlorine pesticides degradation. This has also opened up new ways to utilize semiconductors and solar energy for environmental remediation. Herein, the focus of this review is on environmental remediation of organochlorine pesticides, the different techniques of their removal from the environment, the advantages and disadvantages of the different techniques and the use of specific semiconductors as photocatalysts.
Highlights
The conventional approach to the removal of pesticides from the environment are not effective for the complete removal of these pollutants
A very important point to note about these organochlorine pesticides is that they are all toxic in nature and this makes their removal from the organochlorine pesticides is that they are all toxic in nature and this makes their removal from the environment extremely important
Ricinus communis for the degradation of fifteen out after sixty-six days indicated that the roots of these plants successfully reduced the concentration different persistence organic pollutants including organochlorine pesticides
Summary
The conventional approach to the removal of pesticides from the environment are not effective for the complete removal of these pollutants. When humans or animals consume fish their semivolatile property and they are lipophilic (they mount-up in tissues that have fats like that are contaminated organochlorine active components of the pesticides could be nerves) in nature [6].with. Animals the consume fish that are contaminated with released into the system which have detrimental effect Due to their nature and properties, organochlorine organochlorine pesticides, the active components of the pesticides could be released into the system pesticides aredetrimental found in every partDue of thetoecology including snow, water bodies, soilpesticides and air despite which have effect. Otherspolychlorinated include aldrin, mirex, hexachlorobenzene, furan (dibenzo-p-dioxins), biphenyls, chlordane, heptachlor [7,8] New organochlorine pesticides such as imidacloprid have recently being reported [9].
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