膨润土对制药废水中抗生素的吸附试验研究

Study on Natural and Modified Bentonite Adsorption of Antibiotics

针对制药工业产生的抗生素废水,研究了一定条件下膨润土/酸改性膨润土对土霉素(OTC)和四环素(TC)的吸附作用,综合考察了原土与改性膨润土在不同p H、活化温度、投加量以及吸附时间等条件下的吸附效率。结果表明:在活化温度为200℃、p H=6、投加量为1 g、吸附时间为8 h时,可以有效地吸附两种抗生素,且酸改性膨润土比膨润土吸附效果更好,能够作为环境友好的抗生素吸附剂进行推广。

To deal with the water polluted by antibiotics, adsorption experiments for adsorption behavior of oxytetracycline and tetracycline on bentonite/acid modified bentonite were carried out to investigate the effect of pH, activation temperature, dosing quantity and adsorption time. The results showed that two kind of antibiotics could be absorbed effectively when the activation temperature was 200 ~C, pH = 6, the dosing quantity was 1 g and adsorption time was 8 h. As a kind of environmental friendly adsorbent for promotion, modified bentonite is better than natural bentonite.