Removal of Quinolone Antibiotics from Wastewater by the Biochar-Based Sludge Adsorbent

IF 3.3 3区农林科学 Q2 BIOTECHNOLOGY & APPLIED MICROBIOLOGY Fermentation-Basel Pub Date : 2023-08-12 DOI:10.3390/fermentation9080752

Yaoyu Zhang, Y. Gong, Gang Shi, Xiping Liu, Maifan Dai, Li Ding

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Abstract

Antibiotics have been detected in tiny environmental matrices all over the world, which caused a lot of concern. To solve this problem, biological treatment can be a low-cost and high-efficiency way. The use of biochar adsorbents made from the residual sludge of sewage for wastewater treatment can achieve pollutant removal while realizing pollutant reduction and reuse, which is of great significance for green development. In this study, a prepared biochar-based adsorbent (PBA) was modified and used for norfloxacin (NOR) removal. The composition of the adsorbent was characterized, and the influence of application factors on adsorption performance was investigated. After being modified and optimized, an overall removal efficiency of 84% was achieved for NOR in 4 h. The adsorption behavior was spontaneous and consistent with the Lagergren pseudo-second kinetic model and Langmuir model. The adsorption capacity of PBA reached 8.69 mg·L−1 for NOR. A total removal efficiency of 62% was obtained for five mixed quinolone antibiotics by PBA. The PBA could be well regenerated and reused five times. This study explored a new method of the bio-waste utilization of sewage sludge for antibiotic removal from wastewater.

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生物炭基污泥吸附剂去除废水中喹诺酮类抗生素

抗生素在世界各地的微小环境基质中都被检测到，引起了人们的广泛关注。为了解决这一问题，生物处理可以是一种低成本、高效率的方法。利用污水剩余污泥制成的生物炭吸附剂进行废水处理，可以在去除污染物的同时实现污染物减量和回用，对绿色发展具有重要意义。本研究对制备的生物炭基吸附剂(PBA)进行了改性，并将其用于诺氟沙星(NOR)的去除。对吸附剂的组成进行了表征，并考察了施加因素对吸附性能的影响。改性优化后，在4 h内对硝态氮的总去除率达到84%，吸附行为是自发的，符合Lagergren伪秒动力学模型和Langmuir模型。PBA对NOR的吸附量达到8.69 mg·L−1。PBA对5种混合喹诺酮类抗生素的总去除率为62%。PBA可以很好地再生和重复使用五次。本研究探索了一种利用污泥生物废弃物去除废水中抗生素的新方法。

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