title: Effects of algae growth on cadmium remobilization and ecological risk in sediments of Taihu Lake.
abstract: Indoor simulation experiment with 2.76 L microcosms using sediment from Taihu Lake were conducted to investigate the relationship between algae bloom and heavy metals release into a lake aquatic environment. The results showed that Microcystic aeruginosa (M. aeruginosa) growth can enhance cadmium (Cd) mobilization from sediments to overlying water due to increasing pH and DO content of overlying water and changing the redox condition of surface sediment (0-2 cm) from weak oxidation to weak reduction. The dissolved Cd concentration in overlying water can be decreased during algal growth process. The remobilization of Cd from sediment can effectively reduce the ecological risk of total Cd in sediments. The results of this study showed that both Igeo and Er(i) can be used to effectively evaluate the ecological risk of heavy metal Cd in different fractions.
authors.affiliation: Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, MOE, Hohai University, 210098 Nanjing, China; School of Environment, Hohai University, 210098 Nanjing, China. Electronic address: nilixiao@hhu.edu.cn.
authors.forename: Lixiao
authors.initials: L
authors.lastname: Ni
authors.affiliation: Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, MOE, Hohai University, 210098 Nanjing, China; School of Environment, Hohai University, 210098 Nanjing, China.
authors.forename: Dandan
authors.initials: D
authors.lastname: Li
authors.affiliation: Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, MOE, Hohai University, 210098 Nanjing, China; School of Environment, Hohai University, 210098 Nanjing, China.
authors.forename: Lili
authors.initials: L
authors.lastname: Su
authors.affiliation: Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, MOE, Hohai University, 210098 Nanjing, China; School of Environment, Hohai University, 210098 Nanjing, China.
authors.forename: Jiajun
authors.initials: J
authors.lastname: Xu
authors.affiliation: School of Environment, Nanjing Normal University, 210097 Nanjing, China. Electronic address: lishiyin@njnu.edu.cn.
authors.forename: Shiyin
authors.initials: S
authors.lastname: Li
authors.affiliation: Anhui Urban Construction Design & Research Institute, 230051 Hefei, China.
authors.forename: Xiang
authors.initials: X
authors.lastname: Ye
authors.affiliation: China Machinery International Engineering Design & Research Institute Co., Ltd- Eastchina Branch, 210023 Nanjing, China.
authors.forename: Hong
authors.initials: H
authors.lastname: Geng
authors.affiliation: Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, MOE, Hohai University, 210098 Nanjing, China; School of Environment, Hohai University, 210098 Nanjing, China.
authors.forename: Peifang
authors.initials: P
authors.lastname: Wang
authors.affiliation: Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, MOE, Hohai University, 210098 Nanjing, China; School of Environment, Hohai University, 210098 Nanjing, China.
authors.forename: Yi
authors.initials: Y
authors.lastname: Li
authors.affiliation: Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, MOE, Hohai University, 210098 Nanjing, China; School of Environment, Hohai University, 210098 Nanjing, China.
authors.forename: Yiping
authors.initials: Y
authors.lastname: Li
authors.affiliation: Desert Research Institute, Las Vegas, NV 89119, USA.
authors.forename: Kumud
authors.initials: K
authors.lastname: Acharya
mesh_terms: D002104:Cadmium / Q000737:chemistry*; D004463:Ecology; D004784:Environmental Monitoring; D005068:Eutrophication; D019015:Geologic Sediments / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D060106:Lakes / Q000737:chemistry; D046931:Microcystis / Q000254:growth & development*; D010100:Oxygen / Q000737:chemistry; D018570:Risk Assessment; D014874:Water Pollutants, Chemical / Q000737:chemistry*
chemical_list: D014874:Water Pollutants, Chemical; D002104:Cadmium; D010100:Oxygen
keywords: Cadmium remobilization; Lake Taihu; Microcystic aeruginosa; Risk assessment; Sediment-water interface