山东大学环境科学与工程学院,青岛 266237
School of Environmental Science and Engineering, Shandong University, Qingdao 266237, China
)吸附在好氧颗粒污泥上的生物纳米材料,该材料可以在不影响其他污染物去除性能的情况下提高废水中磺胺嘧啶(SDZ)类抗生素的降解,并强化中间产物的进一步转化。结果表明,AGS对TiO
时吸附速率最快、对污泥内细胞和胞外聚合物影响较小;用该材料降解含SDZ的模拟废水时,紫外光照会促进生物纳米材料中异养菌的活性,提高耗氧有机污染物、SDZ及其中间产物对氨基苯磺酸的去除率,10 h内SDZ平均降解速率可达0.97 mg·(L·h)
。以上获得的新型生物纳米材料可为抗生素废水的处理提供新的技术选择。
The removal effect of antibiotics in conventional wastewater treatment plants is limited. In this study, we prepared a new biological nanomaterial by loading nano titanium dioxide (TiO
) onto aerobic granular sludge (AGS). This biological nanomaterial could improve the degradation of sulfadiazine (SDZ) and facilitate the further conversion of intermediate products without affecting the system performance. The experimental results showed that the adsorption of TiO
on AGS was fitted with pseudo-second-order kinetics model and the structure of the prepared biological nanomaterial was stable. At TiO
had a minor negative effect on cell viability and extracellular polymeric substances. The UV light could promote the activity of heterotrophic bacteria in biological nanomaterials, and improve the removal of COD, SDZ and SDZ intermediate products (4-ABS), and the average degradation rate could reach 0.97 mg·(L·h)
in 10 hours. The nanomaterial provides a new technincal choice for antibiotic wastewater treatment.
.
Effect of different illumination conditions on the SOUR of HB and AOB
Concentration of pollutants at the end of batch experiments
AGS和T-AGS对SDZ吸附、降解及中间产物生成的对比
Comparison of adsorption, biodegradation, and intermediate products of SDZ by AGS and T-AGS
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