期刊
ENVIRONMENTAL POLLUTION
卷 226, 期 -, 页码 486-493出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.envpol.2017.04.044
关键词
Emerging contaminants; Enrofloxacin; Microalgae; Biodegradation; Toxicity
资金
- National Research Foundation of Korea (NRF) grant - South Korean government (MEST) [NRF-2013R1A2A2A07069183, 2017R1A2B2004143]
- National Research Foundation of Korea [2017R1A2B2004143, 22A20153413355] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Enrofloxacin (ENR), a fluoroquinolone antibiotic, has gained big scientific concern due to its ecotoxicity on aquatic microbiota. The ecotoxicity and removal of ENR by five individual microalgae species and their consortium were studied to correlate the behavior and interaction of ENR in natural systems. The individual microalgal species (Scenedesmus obliquus, Chlamydomonas mexicana, Chiorella vulgaris, Our-ococcus multisporus, Micractinium resseri) and their consortium could withstand high doses of ENR (<= 1 mg L-1). Growth inhibition (68-81%) of the individual microalgae species and their consortium was observed in ENR (100 mg L-1) compared to control after 11 days of cultivation. The calculated 96 h EC50 of ENR for individual microalgae species and microalgae consortium was 9.6-15.0 mg ENR All the microalgae could recover from the toxicity of high concentrations of ENR during cultivation. The biochemical characteristics (total chlorophyll, carotenoid, and malondialdehyde) were significantly influenced by ENR (1-100 mg L-1) stress. The individual microalgae species and microalgae consortium removed 18-26% ENR at day 11. Although the microalgae consortium showed a higher sensitivity (with lower EC50) toward ENR than the individual microalgae species, the removal efficiency of ENR by the constructed microalgae consortium was comparable to that of the most effective microalgal species. (C) 2017 Elsevier Ltd. All rights reserved.
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