复合垂直流构建湿地净化酞酸酯的初步研究

PURIFICATION OF PHTHALIC ACID ESTERS (PAEs)BY INTEGRATED VERTICAL CONSTRUCTED WETLANDS

为考察湿地对特殊污染物酞酸酯的净化作用 ,在温室中建造了专门用于酞酸酯研究的 2套下行流 -上行流湿地小试系统 .1号系统邻苯二甲酸二丁酯 (DBP)和邻苯二甲酸二 (2 乙基己基 )酯 (DEHP)污染负荷分别为 19.86mgL-1和 3.16mgL-1,2号系统DBP和DEHP污染负荷分别为 9.84mgL-1和 1.5 8mgL-1.试验时间为 4 5d,水力负荷为4 2 0Ld-1.结果表明 :构建湿地对人工配置污水中的酞酸酯有很好的净化效果 ,平均去除率达到 99.95 %以上 ,出水酞酸酯质量浓度为 10 -9级 ,均低于国家排放标准 (GB 8978 1996 ) .图 3表 3参 2

Two sets of small scale systems of downflow upflow constructed wetlands in a greenhouse were operated to study purification of phthalic acid esters in admeasured water. Each system was composed of two chambers in which water flowed downward in chamber 1 and then upward in chamber 2. The systems were intermittently fed with wastewater under hydraulic load 420 mmd -1 . The influent concentrations of DBP and DEHP in system 1 were 19.86 mg L -1 and 3.16 mg L -1 , while those in system 2 were 9.84 mg L -1 and 1.58 mg L -1 , respectively. Mass concentrations of effluent were of 10 -9 level and below the discharge standard: Chinese GB 8978 1996. Average removal rates of effluent were all over 99.95%. The results revealed the potential purification capacity of this new kind of constructed wetland of removing PAEs from polluted water body. Fig 3, Tab 3, Ref 28