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Variation Characteristics of Chlorpyrifos in Nonsterile Wetland Plant Hydroponic System |
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| Authors: | Chuan Wang Qiaohong Zhou Liping Zhang Yan Zhang Enrong Xiao Zhenbin Wu |
| Institution: | 1. State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology , Chinese Academy of Sciences , Wuhan , 430072 , China;2. Graduate University of the Chinese Academy of Sciences , Beijing , 100049 , China;3. State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology , Chinese Academy of Sciences , Wuhan , 430072 , China |
| Abstract: | Six wetland plants were investigated for their effect on the degradation characteristics of chlorpyrifos in nonsterile hydroponic system at constant temperature of 28°C. The results showed that the removal rates of chlorpyrifos in the water of plant systems were 1.26–5.56% higher than that in the control without plants. Scirpus validus and Typha angustifolia were better than other hygrophytes in elimination of chlorpyrifos. The removal rates of the two systems were up to 88%. Plants of acaulescent group had an advantage over caulescent group in removing chlorpyrifos. Phytoaccumulation of chlorpyrifos was observed, and the order of chlorpyrifos concentration in different plant tissues was root > stem > leaf. It was also found that chlorpyrifos and its metabolite TCP decreased rapidly at the initial step of the experiment. |
| Keywords: | chlorpyrifos wetland plant degradation |