粉末活性炭去除原水中典型抗生素的试验

Experiment of Typical Antibiotics Removal in Raw Water by Powdered Activated Carbon

文章研究了粉末活性炭对原水中4类18种典型抗生素的去除效果。在粉末活性炭投加量为10~30 mg/L、反应时间为30~1 800 min条件下,抗生素总去除率为13.8%~52.5%,去除率随着粉末活性炭投加量和反应时间的增加而升高,抗生素在活性炭上的吸附动力学可用拟二级动力学模型表征。不同种类抗生素的可去除性存在差异,大环内酯类和四环素类去除效果相对较好,磺胺类去除效果一般,氯霉素类较难去除。结果说明,可结合原水系统预处理或水厂头部预处理环节的粉末活性炭投加,一定程度上吸附去除原水中的抗生素污染,减轻后续水厂净水处理压力。

The removal effect of powdered activated carbon to 18 kinds(four types) of antibiotics in the raw water was studied in this paper. Results showed that, the removal rate of antibiotics by powdered activated carbon were 13.8%~52.5% in the dosage of powdered activated carbon were 10~30 mg/L and the reaction time were 30~1 800 min, and removal rates was increased with the increased of powdered activated carbon dosages and reaction time. The adsorption kinetic could in accord with second-order kinetic model. There were differences in the removability of different antibiotics, it were higher removal rates for macrolides and tetracyclines, general removal effect for sulfonamides, and lower removal rates for chloramphenicols. The results showed that addition of powdered activated carbon in the pretreatment of raw water system can absorb and remove the antibiotic, and reduce the pressure of subsequent water purification in WTPs.