دانلود رایگان مقاله انگلیسی نقش فرآیند جذب در حذف داروها توسط تصفیه قارچی فاضلاب - الزویر 2018

abstract

The contribution of the sorption processes in the elimination of pharmaceuticals (PhACs) during the fungal treatment of wastewater has been evaluated in this work. The sorption of four PhACs (carbamazepine, diclofenac, iopromide and venlafaxine) by 6 different fungi was first evaluated in batch experiments. Concentrations of PhACs in both liquid and solid (biomass) matrices from the fungal treatment were measured. Contribution of the sorption to the total removal of pollutants ranged between 3% and 13% in relation to the initial amount. The sorption of 47 PhACs in fungi was also evaluated in a fungal treatment performed in 26 days in a continuous bioreactor treating wastewater from a veterinary hospital. PhACs levels measured in the fungal biomass were similar to those detected in conventional wastewater treatment (WWTP) sludge. This may suggest the necessity of manage fungal biomass as waste in the same manner that the WWTP sludge is managed.

4. Conclusions

According to the results obtained in our studies, some ideas can be highlighted: i) It is worthwhile to measure target compounds in both, liquid and solid (biomass) phases in order to determine the role of the sorption and biodegradation mechanisms when the elimination of pollutants is evaluated, ii) Sorption processes accounted for a 7% of the PhACs elimination (mean value) in our batch experiments. However, the contribution of the sorption processes to overall removal is different depending on the fungus considered, ranging from 4% in the case of S.rugosoannulata to 26% for G.lucidum. Iii) Sorption of PhACs on fungal biomass was similar to that observed into the sludge from conventional CAS treatments. Therefore, based on this preliminary study, fungal biomass should be managed in the same way as the sludge from CAS treatments.