Centro de Investigación en Contaminación Ambiental (CICA), Universidad de Costa Rica (UCR), 2060 San José, Costa Rica.
Centro de Investigación en Contaminación Ambiental (CICA), Universidad de Costa Rica (UCR), 2060 San José, Costa Rica; Centro de Investigación en Biología Celular y Molecular (CIBCM), UCR, 2060 San José, Costa Rica.
J Hazard Mater. 2018 Jan 15;342:553-560. doi: 10.1016/j.jhazmat.2017.08.059. Epub 2017 Aug 26.
Antibiotic-containing wastewaters produced in agricultural activities may depress the pesticide-degrading capacity of biomixtures contained in biopurification systems. This work aimed to assay the effect of oxytetracycline (OTC) on the removal of carbofuran (CFN) in an optimized biomixture, and to determine the capacity of the system to dissipate OTC. During co-application of CFN+OTC, CFN removal and its accelerated degradation were not negatively affected. Similarly, different doses of OTC (10-500mgkg) did not significantly affect CFN mineralization, and the process even exhibited a hormetic-like effect. Moreover, the biomixture was able to remove OTC with a half-life of 34.0 d. DGGE-cluster analyses indicated that fungal and bacterial communities remained relatively stable during OTC application and CFN+OTC co-application, with similarities of over 70% (bacteria) and 80% (fungi). Overall, these findings support the potential use of this matrix to discard OTC-containing wastewater in this system originally intended for CFN removal.
农业活动产生的含抗生素废水可能会降低生物净化系统中所含生物混合物的农药降解能力。本研究旨在检测土霉素（OTC）对优化生物混合物中呋喃丹（CFN）去除的影响，并确定该系统消散 OTC 的能力。在 CFN+OTC 共同应用时，CFN 的去除及其加速降解并未受到负面影响。同样，不同剂量的 OTC（10-500mgkg）也不会显著影响 CFN 的矿化作用，该过程甚至表现出一种激素样效应。此外，生物混合物能够去除半衰期为 34.0d 的 OTC。DGGE 聚类分析表明，在 OTC 应用和 CFN+OTC 共同应用过程中，真菌和细菌群落相对稳定，相似性超过 70%（细菌）和 80%（真菌）。总的来说，这些发现支持了在最初用于 CFN 去除的系统中使用该基质来处理含 OTC 废水的潜力。
