水培条件下绿萝对铜、铬滤除特征

采用室内水培实验的方法,首先分别单独研究了绿萝对水体中铜、铬的滤除作用;进而开展了绿萝对水体中铜/铬复合污染的滤除作用。实验结果显示,当水体中铜浓度在0~3 mg/L范围内,绿萝对其去除率较高,14 d后去除率可达92%;而当水体中铜的浓度在4.5~10 mg/L时,绿萝对其滤除作用较低。绿萝对被铬污染的水体几乎没有滤除作用。在铜/铬复合污染水体中,当铬浓度在0~5 mg/L时,绿萝对其滤除作用明显,去除率可高达86%,说明铜的存在明显促进了铬的吸收。综上所述,绿萝在净化低浓度铜污染以及铜/铬复合污染的水体有很好的应用前景。

Removal characteristics of Cu and Cr by Epipremnum Aureum under hydroponic culture

Using the method of aquatic couture, the uptake of the Cu and Cr by the epipremnum aureum was individually investigated, and then the removal of Cu/Cr combined pollution was carried out. Results showed that, after treated for two weeks,the epipremnum aureum had a high removal efficiency when Cu concentration ranging from 0 to 3 mg/L, as much as 92%. However,the removal was not apparent when copper concentration was in the range from 4.5 to 10 mg/L.The removal was nearly equal zero for Cr. Regarding to the combined pollution, the present of the Cu promote the removal of Cr. the removal reached as much as 86% when the Cr concentration ranging from 0 to 5mg/L. According to analysis, epipremnum aureum is a promising plant for remediation polluted water with low concentration of Cu and Cu/Cr.