Abstract:Based on the simulated experiment the behavior and mechanism of the transfer and transform in the process of thermal treatment for polycyclic aromatic hydrocarbon (PAHs) and polychlorinated biphenyl (PCBs) in the sewage sludge were studied. The ratio of removing from the sewage sludge under 800 ℃ temperature condition was 66.28% for Naphthalene, 73.73% for Fluoranthene, 100% for Benzo[b]fluoranthene, 30.7% for Benzo[a]pyrene, and 100% for Indeno(1,2,3)pyrene. PCBs were quickly reduced at the temperature range within 300~400 ℃, and when at 1000 ℃ the ratio of removing reached 89.35% for PCB28, 90.66% for PCB52, 89.43% for PCB101, 93.97% for PCB118, 99.1% for PCB153, 84.7% PCB138, and 95.22% for PCB180. The transfer of these two pollutants in the process was directly related to the temperature of the treating system. The temperature interval for PAHs transfer and release from the sewage sludge was mainly in 300~750℃ (release more than 90% of the total in the sewage sludge), and for PCBs was in 350~900℃ (release more than 85% of the total in the sewage sludge). In the treatment process there were complicated transform reactions respectively between their monomers of the studied pollutants.
张怡斐, 张辉, 许美芝. 污泥热处理过程中多环芳烃和多氯联苯的迁移行为[J]. 中国环境科学, 2011, 31(6): 933-937.
ZHANG Yi-Fei, ZHANG Hui, XU Mei-Zhi. Transfer behavior of PAHs and PCBs from sewage sludge in the thermal treatment process.. CHINA ENVIRONMENTAL SCIENCECE, 2011, 31(6): 933-937.