| Title: | Assessment of the mechanisms involved in the removal of emerging contaminants by microalgae from wastewater: a laboratory scale study |
| Author(s): | Matamoros V; Uggetti E; Garcia J; Bayona JM; |
| Address: | "Department of Environmental Chemistry, IDAEA-CSIC, c/Jordi Girona, 18-26, E-08034 Barcelona, Spain. Electronic address: victor.matamoros@idaea.csic.es. GEMMA-Group of Environmental Engineering and Microbiology, Department of Hydraulic, Maritime and Environmental Engineering, Universitat Politecnica de Catalunya BarcelonaTech, c/Jordi Girona, 1-3, Building D1, E-08034 Barcelona, Spain. Department of Environmental Chemistry, IDAEA-CSIC, c/Jordi Girona, 18-26, E-08034 Barcelona, Spain" |
| DOI: | 10.1016/j.jhazmat.2015.08.050 |
| ISSN/ISBN: | 1873-3336 (Electronic) 0304-3894 (Linking) |
| Abstract: | "Aerated batch reactors (2.5L) fed either with urban or synthetic wastewater were inoculated with microalgae (dominated by Chlorella sp. and Scenedesmus sp.) to remove caffeine, ibuprofen, galaxolide, tributyl phosphate, 4-octylphenol, tris(2-chloroethyl) phosphate and carbamazepine for 10 incubation days. Non-aerated and darkness reactors were used as controls. Microalgae grew at a rate of 0.25 d(-1) with the complete removal of N-NH4 during the course of the experiment. After 10 incubation days, up to 99% of the microcontaminants with a Henry's law constant higher than 3 10(-1) Pa m(3) mol(-1) (i.e., 4-octylphenol, galaxolide, and tributyl phosphate) were removed by volatilization due to the effect of air stripping. Whereas biodegradation was effective for removing ibuprofen and caffeine, carbamazepine and tris(2-chloroethyl) phosphate behaved as recalcitrant compounds. The use of microalgae was proved to be relevant for increasing the biodegradation removal efficiency of ibuprofen by 40% and reducing the lag phase of caffeine by 3 days. Moreover, the enantioselective biodegradation of S-ibuprofen suggested a biotic prevalent removal process, which was supported by the identification of carboxy-ibuprofen and hydroxy-ibuprofen. The results from microalgae reactors fed with synthetic wastewater showed no clear evidences of microalgae uptake of any of the studied microcontaminants" |
| Keywords: | "Biodegradation, Environmental Chlorophyta/*metabolism Microalgae/*metabolism Pharmaceutical Preparations/chemistry/*metabolism Volatilization Wastewater/microbiology Water Pollutants, Chemical/chemistry/*metabolism Biodegradation Emerging organic contamin;" |
| Notes: | "MedlineMatamoros, Victor Uggetti, Enrica Garcia, Joan Bayona, Josep M eng Research Support, Non-U.S. Gov't Netherlands 2015/09/14 J Hazard Mater. 2016 Jan 15; 301:197-205. doi: 10.1016/j.jhazmat.2015.08.050. Epub 2015 Aug 28" |
