Abstract：Base-catalyzed dechlorination (BCD) is a mature non-incineration method for the detoxification of persistent organic pollutants (POPs). However, little research has focused on the destruction of chlorinated new POPs with this method. In this study, endosulfan was used as a case compound to investigate the influences of temperature, NaOH and paraffin oil amounts on the removal and dechlorination efficiencies (RE and DE) in NaOH/paraffin oil BCD system. The optimal condition obtained from the lab-scale experiments was further verity in a pilot-study. Laboratory study results indicated that the influences of temperature, NaOH and paraffin oil amounts on DE were more obvious than RE. When the optimal mass ratio of endosulfan: NaOH: paraffin oil was 1:3:6~10 and incubated at 250℃ for 3h, the RE and DE was over 99.99% and 99.9%, respectively. The optimal condition was applied to pilot-experiment, with a treatment capacity of 15kg/batch. In addition to endosulfan, dechlorane plus was also used in the pilot-experiment. After heating at 250~300℃ for 3~10h, the RE of endosulfan and dechlorane plus was higher than 99.9%, which implied the wastes were effectively destructed. The successful performance of the pilot scale study would technically support the obligation of Stockholm Convention of country.
黄海, 蒋建国, 肖叶, 宋迎春. 碱催化脱氯技术处理氯代新POPs研究及示范工程[J]. 中国环境科学, 2015, 35(4): 1149-1155.
HUANG Hai, JIANG Jian-Guo, XIAO Ye, SONG Ying-Chun. Lab and pilot scale studies of chlorinated new POPs destruction using base-catalyzed dechlorination method. CHINA ENVIRONMENTAL SCIENCECE, 2015, 35(4): 1149-1155.
