Sensitivity of green and blue-green algae to methyl tert-butyl ether |
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Authors: | CHEN Jianmeng MA Jianyi CAO Wei WANG Pinwei TONG Senmiao and SUN Yizhao |
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Institution: | [1]College of Biological and Environmental Engineering, Zhejiang University of Technology, Hangzhou 310032, China [2]School of Forestry and Biotechnology, Zhejiang Forestry College, Linan 311300, China |
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Abstract: | The toxicity of methyl tert-butyl ether (MTBE) to Chlorella ellipsoidea and Aphanizomenon flos-aquae was tested and assessed for a 15-d incubation with concentrations of MTBE from high (2.00×104 mg/L) to low (2 mg/L). The results showed that the toxicity was low when the concentration of MTBE was in the range 1.00×104−2.00×104 mg/L (the greatest inhibition of growth-rate was 70%–71%, occurred during the day 1–5). Low concentrations (2–500 mg/L) stimulated algal growth up to the greatest effect of 85%–200% when the concentration of MTBE was 50–100 mg/L during day 3–5. The toxicity of MTBE (72–120 h EC50) was 6.65×103–9.58×103 mg/L for C. ellipsoidea and that is 1.14×104–2.00×104 mg/L for A. floc-aquae. We found that the toxicity and ecological risk of MTBE for the algal community structure were low and the toxicity was influenced by the duration time of the test. |
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Keywords: | methyl tert-butyl ether toxicity green algae ecological risk cyanobacteria |
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