曝气吹脱法去除水中三氯乙烷的试验研究

Experiment of trichloroethane removal in water by aeration stripping method

研究了曝气吹脱法对水中1,1,1-三氯乙烷和1,1,2-三氯乙烷的去除效果。结果表明,曝气吹脱法对水中1,1,1-三氯乙烷具有理想的去除效果,但是对1,1,2-三氯乙烷的去除效果很差;当曝气量为0.4～1.0 L/min,气水比为3～5时,能将初始质量浓度为5倍国家标准限值的1,1,1-三氯乙烷降低至《生活饮用水卫生标准》(GB 5749—2006)限值以内;在相同曝气量条件下,气水比越大,对1,1,1-三氯乙烷的去除效果越好。

The removal effects of 1, 1, 1 - trichloroethane and 1, 1,2 - trichloroethane in water by aeration stripping method were studied. The results showed that aeration stripping method had satisfied removal effect on 1, 1, 1 - trichloroethane, but it had bad removal effect on 1, 1,2 - trichloroethane. The initial concentration of 1, 1, 1 - trichloroethane which was 5 times of state standard limit value could be reduced below the limit value of Standards for Drinking Water Quality（ GB 5749--2006 ） when aeration flow was 0.4 to 1.0 L/min and gas-water ratio was 3 to 5. The greater of gas-water ratio was, the better of 1, 1, 1 - trichloroethane removal effect was with the same aeration flow conditions.