两种水生植物对抗生素污染水体的修复作用

The Preliminary Exploration of Remediation the Antibiotics Polluted Water by Two Hydrophytes

采用水培方法,通过检测水样中氨苄青霉素(Ampicillin)、盐酸四环素(Tetracycline)、盐酸土霉素(Oxytetracycline)和盐酸金霉素(Chlortetracycline)含量的动态变化,确定水生植物大漂(Pistia stratiotes)和凤眼莲(Eichhornia crassipes)对水体中抗生素的清除作用。结果显示:①在系列高浓度(10～50μg/mL)抗生素的条件下,凤眼莲去除水中盐酸金霉素与盐酸土霉素的效果优于大漂;②对于采集的污水(抗生素浓度<2.5μg/mL),培养72 h后,大漂和凤眼莲对盐酸四环素的去除率分别达80%和90%以上,对氨苄青霉素的去除率分别达80%和70%以上。大漂和凤眼莲对4种抗生素污染的水体均表现出不同程度的修复功能,特别是凤眼莲效果更佳,可作为去除水体抗生素污染的首选材料。

Hydroponics was used to detect the change of ampicillin, tetracycline, oxytetracycline, and chlortetracycline concentrations in water, to make sure that the elimination effect of Pistia stratiote and Eichhornia crassipes on the antibiotics in the polluted water. The results showed that （1）in the high concentration series（10 - 50 μg/mL）, the elimination effects of E. crassipes on oxytetracycline and chlortetracycline are better than those of P. stratiote; （2）for gathered sewage （antibiotics concentrations 〈 2.5 μg/mL）, after training 72 hours, the removal rate for P. stratiote and E. crassipes to tetracycline reached above 80% and 90% respectively, to ampicillin, reached above 80% and 70% respectively. To sum up, the P. stratiote and E. crassipes can repair different level of the water polluted by this four antibiotics, especially E. crassipes. E. crassipes can be supposed to the preferred plant to remove the antibiotics in the polluted water.