Toxicity of atrazine and its bioaccumulation and biodegradation in a green microalga, Chlamydomonas mexicana
- Authors
- Kabra, Akhil N.; Ji, Min-Kyu; Choi, Jaewon; Kim, Jung Rae; Govindwar, Sanjay P.; Jeon, Byong Hun
- Issue Date
- Nov-2014
- Publisher
- SPRINGER HEIDELBERG
- Keywords
- Atrazine; Bioaccumulation; Biodegradation; Carbohydrate; Chlamydomonas mexicana; Fatty acid
- Citation
- ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH, v.21, no.21, pp.12270 - 12278
- Indexed
- SCIE
SCOPUS
- Journal Title
- ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
- Volume
- 21
- Number
- 21
- Start Page
- 12270
- End Page
- 12278
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/158540
- DOI
- 10.1007/s11356-014-3157-4
- ISSN
- 0944-1344
- Abstract
- This study evaluated the toxicity of herbicide atrazine, along with its bioaccumulation and biodegradation in the green microalga Chlamydomonas mexicana. At low concentration (10 mu g L-1), atrazine had no profound effect on the microalga, while higher concentrations (25, 50, and 100 mu g L-1) imposed toxicity, leading to inhibition of cell growth and chlorophyll a accumulation by 22 %, 33 %, and 36 %, and 13 %, 24 %, and 27 %, respectively. Atrazine 96-h EC50 for C. mexicana was estimated to be 33 mu g L-1. Microalga showed a capability to accumulate atrazine in the cell and to biodegrade the cell-accumulated atrazine resulting in 14-36% atrazine degradation at 10-100 mu g L-1. Increasing atrazine concentration decreased the total fatty acids (from 102 to 75 mg g(-1)) and increased the unsaturated fatty acid content in the microalga. Carbohydrate content increased gradually with the increase in atrazine concentration up to 15 %. This study shows that C. mexicana has the capability to degrade atrazine and can be employed for the remediation of atrazine-contaminated streams.
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