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Toxic effects of wastewater from various phases of monosodium glutamate production on seed germination and root elongation of crops |
| LIU Rui1, ZHOU Qixing2, ZHANG Lanying3, GUO Hao4 |
| 1.College of Environment and Resources, Jilin University, Changchun 130026, China; Liaoning Province Academy of Analytic Sciences, Shenyang 110015, China; 2.Key Laboratory of Terrestrial Ecological Process, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China; College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China; 3.College of Environment and Resources, Jilin University, Changchun 130026, China; 4.Liaoning Province Academy of Analytic Sciences, Shenyang 110015, China; |
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Abstract To make a comprehensive assessment on monosodium glutamate (MSG) wastewater pollution, a pollution exposure experiment was carried out on the seed germination and root elongation of wheat, Chinese cabbage and tomato by using the wastewater discharged from different processing phases of MSG production. The results showed that there were significantly positive linear relationships between the inhibitory rates of wheat seed germination and root elongation and the CODcr of the mother liquor scraps. The toxicity of MSG wastewater to the test crops was in the order of tomato > Chinese cabbage > wheat, indicating that tomato was the most sensitive to the wastewater, and could be considered as an ideal toxic bioindicator. The half-effect concentrations (IC50) based on the seed germination and root elongation of the test crops exposed to the wastewater discharged from various processing phases of MSG production was 22.0 32 432 and 17.3 3320 mg/L, respectively.
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Issue Date: 05 March 2007
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