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A new chemical process has been studied to clean up a mercury-polluted soil by using acidic potassium iodide (KI) solution. A highly contaminated soil (max. 47.1 mg Hg/g) was used as a model sample. Evaluation was made on the effects of aqua regia, HCl, NaOH, Na-EDTA and KI solutions to extract mercury from polluted soil in a batch process. A mixture of 100 mM KI + 50 mM HCl (pH = 1.5) was found...
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