Effects of factors on degradation of Chlordane contaminated soil by Microwave

A batch experiment was earned out on remediation of chlordane contaminated soil by microwave, and factors affecting the remediation were studied. It was found that when the soil was 20% in moisture content, 8. 5 in pH, 50 g · kg^-1 in activated carbon amended, and 20 min irradiation with 600 W microwave, the removal rate of the chlordane in the soil reached to 89%, and the effect could be significantly increased if the soil temperature be maintained above 300 °C, during the process. The experiment proved that the factors affecting chlordane removal rate followed the order of microwave power > irradiation time > activated carbon amendment rate > moisture content. Analysis of the soil solution shows that the degradation had some intermediates, such as chlordane, heptachlor and nonachlor, which suggests that there existed chlo-rination and dechlorination reactions in the process.