人工湿地对印染达标尾水中低浓度锑的再削减

Reduction of low-concentration antimony in the tail water of printing and dyeing by constructed wetland

本研究通过水培实验和等温吸附实验分别考察了7种湿地植物和7种湿地填料对于印染达标尾水中低浓度锑及典型污染物的削减效果。通过动态实验考察不同湿地系统对各污染物的削减效果。结果表明,滴水观音和香蒲可作为印染达标尾水生态净化的优先考虑植物;无烟煤与沸石以质量比2∶1混合的填料在组合填料中具有较好的吸附效果;种植滴水观音的表面流湿地和种植香蒲的水平潜流湿地的组合湿地系统对印染达标尾水中低浓度锑具有较好的再削减能力。

In this study,the effects of seven plants and seven fillers commonly used in wetland on reduction of low-concentration antimony and typical pollutants in dyeing tail water were investigated through hydroponics experiments of plants and isothermal adsorption experiments of fillers respectively.Dynamic experiments were conducted to inve-stigate the effects of different wetland systems on the abatement of various pollution factors.The results showed that alocasia macrorrhiza and cattail could be considered as the priority plants for ecological purification of dyeing tail water up to standard.Anthracite and zeolite mixed fillers with mass ratio of 2∶1 had a better adsorption effect in the composite fillers.The combined wetland system of surface flow wetland with alocasia macrorrhiza and horizontal sub-surface flow wetland with cattail had good ability to reduce the low concentration of antimony in the tail water of dye-ing and printing.