Between the 1930s and the 1980s, polychlorinated biphenyls (PCBs) were widely employed as persistent organic pollutants (POPs). Despite the fact that their usage has been severely restricted, many PCBs can still be detected in the environment, such as in soils and sediments. This overview covers the most common remediation methods, such as phytoremediation, microbial degradation, chemical reagent dehalogenation, and PCB elimination using activated carbon. Supercritical water oxidation, ultrasonic radiation, bimetallic systems, nanoscale zero-valent iron based reductive dehalogenation and biofilm covered activated carbon, electrokinetic remediation, and nZVI particles in combination with a second metal are all discussed as new insights from recent PCB remediation studies. Despite several efforts to limit its presence, the extensive dispersion of this material, as well as other persistent organic pollutants (POPs) with similar chemical, toxicological, and environmental characteristics, continues to grow in the environment. The focus of this review is on prospective trends in PCB cleanup in the environment, as well as the methods employed. Plant remediation and microorganism degradation are also contrasted as biological detoxification methods for the chemical. This will highlight prospective bioremediation improvement strategies combining plants and microorganisms, filling the gap left by standard remediation treatments, which have their own limits and problems.
R. O. Anyasi,
Department of Environmental Sciences, University of South Africa, Pretoria, South Africa.
H. I. Atagana,
Institute for Science and Technology Education, University of South Africa, Pretoria, South Africa.
Please see the link here: https://stm.bookpi.org/RABS-V3/article/view/7046
No comments:
Post a Comment