期刊
CHEMOSPHERE
卷 93, 期 10, 页码 2480-2487出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.chemosphere.2013.08.091
关键词
Antimicrobials; gamma-irradiation; UV; Activated sludge; Pseudokirchneriella subcapitata; Toxicity change
资金
- NRF
- MEST [2013R1A2A2A03014187]
- National Research Foundation of Korea [2013R1A2A2A03014187] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
The occurrence and persistence of pharmacologically active compounds in the environment has been an increasingly important issue. The objectives of this study were to investigate the decomposition of aqueous antimicrobial compounds using activated sludge, gamma-irradiation, and UV treatment, and to evaluate the toxicity towards green algae, Pseudokirchneriella subcapitata, before and after treatment. Tetracycline (TCN), lincomycin (LMC) and sulfamethazine (SMZ) were used as target compounds. Gamma (gamma)-irradiation showed the highest removal efficiency for all target compounds, while UV and activated sludge treatment showed compound-dependent removal efficiencies. TCN and SMZ were well degraded by all three treatment methods. However, LMC showed extremely low removal efficiency for UV and activated sludge treatments. Overall, the algal toxicity after degradation processes was significantly decreased, and was closely correlated to removal efficiency. However, in the case of gamma-irradiated TCN, UV and activated sludge treated LMC as well as sludge treated SMZ, the observed toxicity was higher than expected, which indicates the substantial generation of byproducts or transformed compounds of a greater toxicity in the treated sample. Consequently, gamma-radiation treatment could be an effective method for removal of recalcitrant compounds such as antibiotics. (C) 2013 Elsevier Ltd. All rights reserved.
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