Journal of Guangxi Normal University(Natural Science Edition) ›› 2014, Vol. 32 ›› Issue (4): 142-151.

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Pollution and Fixed/Transformed Ratio of Paraquat in Water of Huixian Wetland

LAN Yun-hua1, JIANG Shao-feng1, GONG You-li1, LI Yun-fei1, XIA Ying-hua1, LU Zu-jun1,2,3   

  1. 1. College of Life Science, Guangxi Normal University, Guilin Guangxi 541004, China;
    2. Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection Guangxi Normal University, Ministry of Education, Guilin Guangxi 541004, China;
    3. Key Ecological Laboratory of Wild Animal and Plant Species of Guangxi Colleges and Universities, Guilin Guangxi 541004, China
  • Received:2014-06-11 Published:2018-09-26

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Abstract: The pollution statue of paraquat in the overlying water of Huixian Wetland as well as the residents’ drinking water around the Wetland were investigated used microcalorimetric methods and high performance liquid chromatography (HPLC), meanwhile, the effect of paraquat on the activity of the wetland’s sediment microbes and its fixed/transformed ratio (concentration of 0~120 μg/g) were measured. The results showed that paraquat could not be detected in the drinking water but in the overlying water (1~16.8 μg/kg); microorganisms in the sediment showed similar power-time curves and all with a second logarithmic growth phase under the same laboratory conditions; only 120 μg/g(dry soil) paraquat obviously postponed the microbes growing;52%~55% of added Paraquat was fixed/transformed (96 h) by the sediment, which meant that as high as 40%~50% of the added does would be scoured or leached into the flowing water then transported far away from its occurence. The results indicated that there existed potential Paraquat security risks against mammals and human health in the region of Huixian Wetland, so the paraquat was suggested to be listed in the cheking range of water-quality index around this wetland.

Key words: Huixian Wetland, paraquat, sediment microbes, microcalorimetric methods, HPLC

CLC Number: 

  • X53
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