光催化降解四环素类抗生素废水影响因素分析

Analysis of factors affecting of photocatalytic degradation tetracycline antibiotic wastewater

抗生素是一种具有潜在生态风险的污染物,含抗生素的废水难降解,并且包含大量的生物抑制性物质,对于以生化处理为主的污水处理厂有一定的处理难度.基于多位学者对光催化技术去除污水中四环素类抗生素的研究,总结其现状以及pH、废水初始浓度和催化剂用量对降解率的影响.结果表明:光催化技术对四环素类废水具有良好的降解效果,降解率高达80%以上,并且可循环使用,稳定性好.pH在5~9范围对光催化降解有提升作用,强酸强碱体系对光催化反应有抑制;抗生素废水的初始浓度与降解率成反比;降解率与催化剂的投加量成正比关系,随投加量的增加先快速上升,随后逐渐趋于平缓.

Antibiotics are a kind of pollutants with potential ecological risks.Wastewater containing antibiotics is difficult to degrade and contains a large amount of bio-inhibitory substances.For wastewater treatment plants that mainly rely on biochemical treatment,there are certain difficulties in treatment.Based on the research of many scholars on the removal of tetracycline antibiotics in wastewater by photocatalytic technology,the current status and the effects of pH,initial wastewater concentration and catalyst dosage on the degradation rate were summarized.The results show that photocatalytic technology has a good degradation effect on tetracycline wastewater,the degradation rate is as high as 80%,and it can be recycled with good stability.When the pH is 5-9,the photocatalytic degradation is improved,and the strong acid and alkali system inhibits the photocatalytic reaction;the initial concentration of antibiotic wastewater is inversely proportional to the degradation rate;the degradation rate is directly proportional to the amount of catalyst added,with the increase in the amount of investment,it first rises rapidly,and then gradually flattens.