title: Bioremediation of endosulfan in laboratory-scale constructed wetlands: effect of bioaugmentation and biostimulation.
abstract: Bioremediation is widely used in organic pollutants disposal. However, very little has been known on its application in constructed wetlands contaminated with organochlorine pesticide, endosulfan in particular. To evaluate the effect of bioremediation on endosulfan removal and clarify the fate, bioaugmentation and biostimulation were studied in laboratory-scale vertical-flow constructed wetlands. After 20 days' experiment, endosulfan isomers removal efficiencies were increased to 89.24-97.62 % through bioremediation. In bacteria bioaugmentation (E-in) and sucrose biostimulation (E-C), peak concentrations of endosulfan in sediment were reduced by 31.02-76.77 %, and plant absorption were 347.45-576.65 μg kg(-1). By contrast, plant absorption in KH2PO4 biostimulation (E-P) was increased to 811.64 and 1,067.68 μg kg(-1). Degradation process was probably promoted in E-in and E-C, while plant absorption was enhanced in E-P. Consequently, E-in and E-C were effective for endosulfan removal in constructed wetlands, while adding KH2PO4 had potential to cause air pollution. Additionally, combined bioremediation was not recommended.
authors: School of Environmental Science and Engineering, Shandong University, Jinan, 250100, China.
authors: Congcong
authors: C
authors: Zhao
authors: HuiJun
authors: H
authors: Xie
authors: Yang
authors: Y
authors: Mu
authors: Xiaoli
authors: X
authors: Xu
authors: Jian
authors: J
authors: Zhang
authors: Cui
authors: C
authors: Liu
authors: Shuang
authors: S
authors: Liang
authors: Huu Hao
authors: HH
authors: Ngo
authors: Wenshan
authors: W
authors: Guo
authors: Jingtao
authors: J
authors: Xu
authors: Qian
authors: Q
authors: Wang
mesh_terms: D001419:Bacteria / Q000235:genetics / Q000378:metabolism; D001673:Biodegradation, Environmental; D004726:Endosulfan / Q000032:analysis / Q000378:metabolism*; D007306:Insecticides / Q000032:analysis / Q000378:metabolism*; D010802:Phylogeny; D006109:Poaceae / Q000378:metabolism; D012988:Soil Microbiology; D014874:Water Pollutants, Chemical / Q000032:analysis / Q000378:metabolism*; D018508:Water Purification / Q000379:methods; D053833:Wetlands
chemical_list: D007306:Insecticides; D014874:Water Pollutants, Chemical; D004726:Endosulfan