title: [Purification effects of large-area planting water hyacinth on water environment of Zhushan Bay, Lake Taihu].
abstract: Using water hyacinth and other fast-growing and high biomass of floating plants to purify polluted water has become an efficient and effective ecological restoration method at present. Effects of nutrients adsorption and water purification of planting water hyacinth on water quality in Zhushan Bay were studied. The results indicated that no anoxia was observed in water hyacinth planting areas because of wave disturbance and strong water exchange. Concentrations of TN and TP in water hyacinth planting areas were higher than that in the outside of stocking area (the content ranged 3.03-7.45 mg/L and 0.15-0.38 mg/L, respectively), and the content changes ranged 3.37-8.02 mg/L and 0.15-0.36 mg/L,respectively. The higher concentration of TN and TP in water indicated the water body was heavily polluted. Water hyacinth roots have a strong ability to adsorb suspended solids and algae cells, the concentration of Chl-a in stocking areas was higher than that in stocking fringe and outside, the maximum Chlorophyll in the stocking region in August was 177.01 mg/m3, and at the same time the concentrations in planting fringe and outside were 101.53 mg/m3 and 76.96 mg/m, respectively. Higher Chl-a content on water hyacinth roots indicated that water hyacinth had strong blocking effects on algae cells, and demonstrated it had a great purification effects on eutrophicated water, and it also provides a basis for the larger polluted water bodies purification in using water hyacinth.
authors.affiliation: Institute of Agricultural Resource and Environment, Jiangsu Academy of Agricultural Science, Nanjing 210014, China. njliugf@yahoo.cn
authors.forename: Guo-feng
authors.initials: GF
authors.lastname: Liu
authors.forename: Zhi-yong
authors.initials: ZY
authors.lastname: Zhang
authors.forename: Shao-hua
authors.initials: SH
authors.lastname: Yan
authors.forename: Ying-ying
authors.initials: YY
authors.lastname: Zhang
authors.forename: Hai-qin
authors.initials: HQ
authors.lastname: Liu
authors.forename: Cheng-xin
authors.initials: CX
authors.lastname: Fan
mesh_terms: D001673:Biodegradation, Environmental; D002681:China; D005618:Fresh Water / Q000032:analysis; D031423:Hyacinthus / Q000254:growth & development / Q000378:metabolism*; D009584:Nitrogen / Q000302:isolation & purification / Q000378:metabolism; D010758:Phosphorus / Q000302:isolation & purification / Q000378:metabolism; D014874:Water Pollutants, Chemical / Q000302:isolation & purification* / Q000378:metabolism; D018508:Water Purification / Q000379:methods*
chemical_list: D014874:Water Pollutants, Chemical; D010758:Phosphorus; D009584:Nitrogen