title: Impacts of potassium ferrate(VI) on the growth and organic matter accumulation, production, and structural changes in the cyanobacterium Microcystis aeruginosa.
abstract: Cyanobacterial blooms generated by nutrient addition into aquatic systems pose serious risks to ecosystems and human health. Though there are established chemical, physical, and biological means of eradication, more efficient and environmentally friendly measures are desired. This study investigates the effect of potassium ferrate(VI) on the growth and intracellular and extracellular organic matter accumulations of the cyanobacterium Microcystis aeruginosa. Cultures were inoculated with three separate concentrations of potassium ferrate(VI) (3, 15, 30 mg L-1) and monitored by measuring chlorophyll-a (Chl-a) and intracellular/extracellular dissolved organic carbon. Results show that ferrate(VI) addition effectively removed the microalgae from the medium, as indicated by the reduction of Chl-a. Organic matter accumulation of the microalgae was also affected by ferrate(VI) treatment; fluorescence EEM spectra show details of changing intracellular dissolved organic matter (IDOM) and extracellular dissolved organic matter (EDOM). A new peak appeared in the EDOM indicating altered humic and proteinaceous compounds. This study demonstrates that ferrate(VI) is a potential treatment for the water contaminated with the toxic microalgae M. aeruginosa.
authors.affiliation: Shanghai University, Shanghai, 201800, People's Republic of China. liushuyu@shu.edu.cn.|State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, 150090, People's Republic of China. liushuyu@shu.edu.cn.
authors.forename: Shu-Yu
authors.initials: SY
authors.lastname: Liu
authors.affiliation: Shanghai University, Shanghai, 201800, People's Republic of China.
authors.forename: Jingling
authors.initials: J
authors.lastname: Xu
authors.affiliation: State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, 150090, People's Republic of China.
authors.forename: Wen-Li
authors.initials: WL
authors.lastname: Chen
authors.affiliation: Department of Earth and Environment, Florida International University, Miami, FL, 33186, USA.
authors.forename: Berthold E
authors.initials: BE
authors.lastname: David
authors.affiliation: Shanghai University, Shanghai, 201800, People's Republic of China.
authors.forename: Minghong
authors.initials: M
authors.lastname: Wu
authors.affiliation: State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, 150090, People's Republic of China. mafang@hit.edu.cn.
authors.forename: Fang
authors.initials: F
authors.lastname: Ma
mesh_terms: D007501:Iron; D058085:Iron Compounds / Q000737:chemistry*; D046931:Microcystis / Q000187:drug effects*; D017680:Potassium Compounds / Q000737:chemistry*
chemical_list: D058085:Iron Compounds; D017680:Potassium Compounds; C017311:ferrate ion; C044384:potassium ferrate; D007501:Iron
keywords: Accumulation; Dissolved organic matter; Extracellular; Ferrate(VI); Intracellular