title: Ecotoxicological analysis of fly ash and rice-straw black carbon on Microcystis aeruginosa using flow cytometry.
abstract: Black carbon (BC) has a strong affinity for hydrophobic organic compounds (HOCs), and it is a potential material to control HOCs pollution in aquatic ecosystems. Here, flow cytometry (FCM) was used to evaluate the ecotoxicological effect of fly ash, rice-straw ash, and their acid-demineralised products on the growth of Microcystis aeruginosa. It was found that the BCs had little negative effect on cyanobacteria, when the content of BCs was not above 1mgml(-1). However, higher doses of BCs (>2mgml(-1)) had an obvious negative effect on cell density and esterase activity, especially for BCs with acid treatment, which greatly inhibited cell density caused by its high adsorptivity for cyanobacteria. The BCs had little impact on the fluorescence intensity, only with a slight stimulation in later period, so the fluorescence intensity was a less sensitive indicator than cell density and esterase activity. Considering ecotoxicological effect of BCs on the algae, the application concentration of BCs for HOCs pollution control as in situ remediation material would better not exceed 1mgml(-1).
authors.affiliation: Department of Environmental Engineering, Zhejiang University, Hangzhou 310029, China.
authors.forename: Liping
authors.initials: L
authors.lastname: Lou
authors.forename: Qiankun
authors.initials: Q
authors.lastname: Yue
authors.forename: Feixiang
authors.initials: F
authors.lastname: Liu
authors.forename: Fang
authors.initials: F
authors.lastname: Chen
authors.forename: Baolan
authors.initials: B
authors.lastname: Hu
authors.forename: Yingxu
authors.initials: Y
authors.lastname: Chen
mesh_terms: D000327:Adsorption; D060729:Coal Ash / Q000737:chemistry / Q000633:toxicity*; D054750:Ecotoxicology; D052918:Environmental Restoration and Remediation; D005434:Flow Cytometry; D046931:Microcystis / Q000187:drug effects*; D012275:Oryza / Q000737:chemistry; D018570:Risk Assessment; D053260:Soot / Q000737:chemistry / Q000633:toxicity*
chemical_list: D060729:Coal Ash; D053260:Soot