复合垂直流构建湿地净化酞酸酯的初步研究

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-乙基已基）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1.58mgL^-1，试验时间为45d。水力负荷为420Ld^-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（GB8978-1996）.

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

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