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DECHLORINATION OF HEXACHLOROBENZENE IN CONTAMINATED SOILS USING A NANOMETALLIC AL/CAO DISPERSION MIXTURE: OPTIMIZATION THROUGH RESPONSE SURFACE METHODOLOGY
Jiang, Y., Y. Shang, S. Yu, and J. Liu.
International Journal of Environmental Research and Public Health 15(5):872(2018)

A nanometallic Al/CaO (n-Al/CaO) dispersion mixture was developed utilizing ball-milling technology to evaluate the reductive stabilization technique's effect on dechlorination of hexachlorobenzene (HCB) in contaminated soils. The optimal soil moisture content, n-Al/CaO dosage, and grinding time were found to be 7% (m/m), 17.7% (m/m), and 24 h, respectively, in the experimental ranges and levels. Under optimal conditions, dechlorination efficiency was 80%. Intermediate product analysis indicated that dechlorination was the process by stepwise loss of chloride atoms. The main pathway observed within 24 h was HCB > pentachlorobenzene > 1,2,3,4-tetrachlorobenzene (TeCB) and 1,2,4,5-TeCB. Results indicated that moderate soil moisture content was crucial for HCB hydrodechlorination. http://www.mdpi.com/1660-4601/15/5/872/htm



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