title: [Study on a new method of fast monitoring toxicity of Cd2+ by algal in water].
abstract: Chlorophyll concentration and photosynthesis activity fluorescence parameters of Chlorella pyrenoidosa stressed by different concentrations of Cd2+ were measured based on algal growth inhibition tests and photosynthetic activity inhibition tests. The relationship between the algal photosynthetic activity inhibition rate and 96 h inhibition rate of specific growth rate at different Cd2+ stress times was studied by sigmoidal curve fitting and one-way ANOVA analysis. The result shows that S function relevance exists between the algal photosynthetic activity inhibition rates for 48 h, 53 h, 72 h, 77 h and 96 h respectively and 96 h inhibition rate of specific growth rate (R2 > 0.95). Consequently, EC10 (10% effective concentration) after 48 h and 53 h inhibition in photosynthetic activity inhibition tests could be used to represented EC50 (50% effective concentration) in 96 h algal growth inhibition tests for evaluating the Cd2+ toxicity. Dose-response relationships between the algal photosynthetic activity inhibition rates after 48 h and 53 h inhibition and Cd2+ toxic equivalency quantity were further analyzed. The method provided a rapid and viable new thought to monitoring single Cd2+ toxicity in lab and early warn integrated toxicity of pollution in water.
authors.forename: Jing-Bo
authors.initials: JB
authors.lastname: Duan
authors.forename: Wen-Qing
authors.initials: WQ
authors.lastname: Liu
authors.forename: Yu-Jun
authors.initials: YJ
authors.lastname: Zhang
authors.forename: Nan-Jing
authors.initials: NJ
authors.lastname: Zhao
authors.forename: Gao-Fang
authors.initials: GF
authors.lastname: Yin
authors.forename: Xue
authors.initials: X
authors.lastname: Xiao
authors.forename: Xiao-Ya
authors.initials: XY
authors.lastname: Yu
authors.forename: Li
authors.initials: L
authors.lastname: Fang
mesh_terms: D002104:Cadmium / Q000633:toxicity*; D002734:Chlorophyll / Q000032:analysis; D000460:Chlorophyta / Q000187:drug effects*; D004305:Dose-Response Relationship, Drug; D004784:Environmental Monitoring / Q000379:methods*; D005453:Fluorescence; D010788:Photosynthesis / Q000187:drug effects; D014867:Water / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000633:toxicity*
chemical_list: D014874:Water Pollutants, Chemical; D002104:Cadmium; D014867:Water; D002734:Chlorophyll