Abstract:Perchloroethylene (PCE) as a typical chlorinated hydrocarbon solvent was widely used in industry. Now the groundwater of contaminated sites is badly polluted due to improper handling of PCE, which results in a serious threat to human health and ecological security. Air stripping in sieve plate tower for the treatment of the water polluted by PCE was studied. The results are as follows: After air stripping, PCE concentration declined from 25.68mg/L to 0.62mg/L, and removal rate amounted to 97.59%; Gas-liquid ratio obviously affected PCE removal rate and the optimum gas-liquid ratio was around 200; Initial concentration influenced the removal effect slightly; Waste water was better treated by 4 plates column; Experimental data followed one-order decay model very well; Economic cost was about ¥0.31 per ton of waste water, and therefore air stripping as a pre-treatment process of biochemical method was desirable.
张卫, 李丽, 林匡飞, 李炳智, 吕树光, 杜晓明, 郭美锦, 崔心红. 采用筛板塔吹脱模拟处理四氯乙烯污染地下水[J]. 中国环境科学, 2012, 32(6): 1001-1006.
ZHANG Wei, LI Li, LIN Kuang-Fei, LI Bing-Zhi, 吕Shu-Guang , DU Xiao-Ming, GUO Mei-Jin, CUI Xin-Hong. Air stripping in sieve plate tower for the simulated treatment of the groundwater polluted by perchloroethylene. . CHINA ENVIRONMENTAL SCIENCECE, 2012, 32(6): 1001-1006.