2-氯联苯与4-氯联苯的超声降解研究

STUDY OF 2-CHLOROBIPHENYL AND 4-CHLOROBIPHENYL SONICATION

以 2 氯联苯 ( 2CB)与 4 氯联苯 ( 4CB)为对象 ,研究了污染物结构对超声降解的影响 .在 2 0kHz,30 8W·cm- 2 的超声波作用下 ,2CB与 4CB的准一级降解速率常数分别达到 0 1 2 8min- 1 和 0 0 98min- 1 .其反应速率的差异来自不同取代基位置导致的挥发性之差 .在 95 %的母体去除后 ,～ 80 %的有机氯转化成无机氯离子 . 1h后 2CB与 4CB溶液的TOC去除率分别达到 40 %和 35 % .

This paper studies the sonication of 2-cholrobiphenyl(2CB)and 4-chlorobipheyl(4CB)to reveal the impact of pollutant structure on its sono-degradation.Under 20 kHz and 30.8 W·cm -2 ,the first order rate constants were 0.128 min -1 and 0.098min -1 for 2CB and 4CB respectively.Ultrasound effectively transformed 80% organic chlorine into inorganic chloride when 95% parent compounds were destroyed.The TOC removal after 1h sonication reached 40% and 35% for for 2CB and 4CB respectively.