1，2，4－三氯苯在土壤中的降解

Degradation of 1, 2, 4-trichlorobenzene (1, 2, 4-TCB) in soil

在好氧和厌氧两种条件下研究了１，２，４－三氯苯的降解，结果表明，１，２，４－三氯苯的好氧降解和厌氧降解均遵循一级反应动力学在同样水分、温度及初始浓度条件下，１，２，４－三氯苯的好氧降解比厌氧降解迅速，其半衰期分别为１．８９～５．８６和５．０７～１９．０８ｄ土壤中１，２，４－三氯苯的初始浓度对于其降解也有显著影响，在０～１００μｇ·ｇ－１的范围内，浓度增高时，其降解加快，说明污染物浓度对降解的影响；在１０～３０℃范围内，温度增高导致降解过程加快，归因于温度升高对微生物酶活性的激活作用．

Degradation of 1, 2, 4-TCB in soil was studied under both aerobic and anaerobic conditions. The results show that both aerobic and anaelxibic degradation of 1, 2, 4-TCB obeys the first order dynamics. Under same water content, temperature and initial concentration, the aerobic degradation is rapider than anaerobic one with half-lives of 1. 89～5. 86 and 5. 07～19. 08 days respectively. Initial concentration of 1, 2, 4-TCB significantly affected the degradation rate, with initial concentration ranging from 0 to 100 μg·g-1,higher concentration promotes the degradation. Higher temperature within the range of 10～30℃ accelerates the degradation due to the activation of microbial enzyme at high temperature.