摘要
通过连续过滤方法和实验室氯化、臭氧化实验研究了哈尔滨地区土壤提取液中天然有机物的卤代活性以及不同形态天然有机物的差异 .比较了氯化和臭氧化条件下的卤代烃生成量及处理后的 7日卤代潜力 .研究结果表明 ,在数分钟的氯化实验中 ,憎水有机物、腐殖酸类化合物和非腐殖酸类亲水有机物的单位有机碳卤代烃生成量分别为 1 46、0 35和 4 0 3μg mg(C) .而 7日卤代潜力则分别为 6 6、5 7 2和 40 6 μg mg(C) .可见其差别不仅表现在热力学方面 ,而且反应在反应速率方面 .在本实验条件下 。
Fractionation and chlorination/ozonization were combined to study the precursors of THMs in soil extract from Ha'erbin, China. Three fractions, hydrophobic, humic, and non\|humic hydrophilic compounds were compared for their THMFP. It was demonstrated that during a short experimental period, THMs formed from the three fractions were 1.46、0 35 and 4 03?μg/mg(C). respectively, After a 7\|day incubation, however, humic substances generated the highest amount of THMs. The THMFP of the three fractions were 6 6、57 2 and 40 6?μg/mg(C), indicating a high THMs formation potential and a relatively slow reaction kinetics of humic substances. Under the experimental condition, the THMFP could be reduced by the ozonization in half.
出处
《环境科学学报》
CAS
CSCD
北大核心
2002年第1期76-79,共4页
Acta Scientiae Circumstantiae
基金
博士点基金 (No .980 0 0 140 )
