Methods for disposing of chlorinated aromatic waste have been evolving since the late 1960s, when it was realised that these compounds were putting significant demands on the environment. Many of the initial studies were concerned with developing methods for cleaning-up contaminated soils, and chemical and thermal methods were preferred. However, these techniques had many disadvantages, including cost and incomplete destruction of contaminants, and so alternative methods of disposal were developed. The techniques now available include bioremediation, various advanced oxidation methods such as those involving photochemical processes, supercritical water oxidation, electrochemistry and sonochemistry. In the future, it is anticipated that many commecial applications of these technologies will be developed.
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