Suárez Andrés F, Camargo Carlos E, Esteso Miguel A, Romero Carmen M
Departamento de Ingenieria, Universidad de Bogota Jorge Tadeo Lozano, Bogotá 111711, Colombia.
Departamento de Quimica, Universidad Nacional de Colombia, Bogotá 111321, Colombia.
Toxics. 2022 Apr 22;10(5):209. doi: 10.3390/toxics10050209.
Insulating oil contaminated with polychlorinated biphenyls (PCBs) is an environmentally important pollutant. This research focused on the establishment of the optimum conditions under which photocatalytic oxidation can be used together with biotreatment using the sp. microorganism to degrade PCBs present in used dielectric oils. Among the optimal conditions studied were PCB concentration, initial pH, and titanium dioxide (TiO) concentration for the photocatalytic step, and PCB concentration and photoperiod for the biotreatment step. The results indicate that the optimal conditions necessary for photocatalytic degradation were a pH of 6.10, 113 mg/L TiO, and 765 mg/L PCBs, achieving close to 90% removal. For the biotreatment step, the results showed that PCBs progressively inhibited the microbiological growth, with the lowest cellular growth observed in the medium with the highest PCB concentration.
被多氯联苯（PCBs）污染的绝缘油是一种对环境有重要影响的污染物。本研究着重于确定最佳条件，在此条件下光催化氧化可与使用特定微生物的生物处理相结合，以降解废旧绝缘油中存在的多氯联苯。所研究的最佳条件包括光催化步骤中的多氯联苯浓度、初始pH值和二氧化钛（TiO₂）浓度，以及生物处理步骤中的多氯联苯浓度和光照周期。结果表明，光催化降解所需的最佳条件为pH值6.10、TiO₂浓度113 mg/L和多氯联苯浓度765 mg/L，去除率接近90%。对于生物处理步骤，结果显示多氯联苯逐渐抑制微生物生长，在多氯联苯浓度最高的培养基中观察到最低的细胞生长。
