title: Distribution of atrazine and its phytoremediation by submerged macrophytes in lake sediments.
abstract: We investigated sediments with high atrazine accumulation capability from 6 eutrophic lakes in Hubei Province of central China. Almost all lakes have atrazine in their sediments because of human activities. Honghu Lake and Liangzihu Lake were found to have higher levels of atrazine in sediment: 0.171 and 0.114 mg kg-1, respectively. The results showed that lake sediments could adsorb atrazine six times faster than soils. The equilibrium partition coefficient of atrazine desorption (KPd) is much larger than the adsorption equilibrium partition coefficient (KPa) of atrazine, indicating that the residue of atrazine in water is easily immobilized by the sediments. Meanwhile, the incubation experiment showed that the removal rateof atrazine in Potamogeton crispus-planted and Myriophyllum spicatum-planted sediments reached >90%, while the rate in unplanted sediments was 77.2 ± 2.12% over 45 d. In unplanted sediment, the half-life of atrazine dissipation was 14.30 d, which was strongly enhanced by P. crispus and M. spicatum, greatly reducing the half-life to 8.60 and 9.72 d, respectively. These two submerged macrophytes are considered to be potential tools in the remediation of atrazine-contaminated sediments.
authors.affiliation: Laboratory of Eco-Environmental Engineering Research, College of Resources and Environment, Huazhong Agricultural University, Wuhan, 430070, China.
authors.forename: Mengjie
authors.initials: M
authors.lastname: Qu
authors.affiliation: Laboratory of Eco-Environmental Engineering Research, College of Resources and Environment, Huazhong Agricultural University, Wuhan, 430070, China; Institute of Quality Standard and Testing Technology, Shandong Academy of Agricultural Sciences, Jinan, 250100, China.
authors.forename: Huidong
authors.initials: H
authors.lastname: Li
authors.affiliation: Laboratory of Eco-Environmental Engineering Research, College of Resources and Environment, Huazhong Agricultural University, Wuhan, 430070, China.
authors.forename: Na
authors.initials: N
authors.lastname: Li
authors.affiliation: Laboratory of Eco-Environmental Engineering Research, College of Resources and Environment, Huazhong Agricultural University, Wuhan, 430070, China.
authors.forename: Guanglong
authors.initials: G
authors.lastname: Liu
authors.affiliation: Laboratory of Eco-Environmental Engineering Research, College of Resources and Environment, Huazhong Agricultural University, Wuhan, 430070, China.
authors.forename: Jianwei
authors.initials: J
authors.lastname: Zhao
authors.affiliation: Laboratory of Eco-Environmental Engineering Research, College of Resources and Environment, Huazhong Agricultural University, Wuhan, 430070, China.
authors.forename: Yumei
authors.initials: Y
authors.lastname: Hua
authors.affiliation: Laboratory of Eco-Environmental Engineering Research, College of Resources and Environment, Huazhong Agricultural University, Wuhan, 430070, China.
authors.forename: Duanwei
authors.initials: D
authors.lastname: Zhu
mesh_terms: D000327:Adsorption; D001280:Atrazine / Q000032:analysis*; D001673:Biodegradation, Environmental; D002681:China; D004784:Environmental Monitoring; D019015:Geologic Sediments / Q000737:chemistry; D006207:Half-Life; D006801:Humans; D060106:Lakes / Q000737:chemistry*; D019684:Magnoliopsida / Q000737:chemistry; D031821:Potamogetonaceae; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D014874:Water Pollutants, Chemical; D001280:Atrazine
keywords: Atrazine; Distribution; Phytoremediation; Sediment; Submerged macrophytes