title: The growth behavior of Chlorella vulgaris in the presence of 4-chlorophenol and 2,4-dichlorophenol.
abstract: Toxicity of 4-chlorophenol (4-CP) and 2,4-dichlorophenol (2,4-DCP) on the growth of Chlorella vulgaris was investigated in batch reactors. Results revealed that 4-CP did not adversely affect the growth of algae up to 20mg/L, however higher concentrations inhibited growth appreciably and no growth was detected at 100mg/L. 4-CP also caused some physiological changes in the algal cells as increasing initial 4-CP concentration caused a linear decrease in chlorophyll a (chl-a) content of the cell. 2,4-DCP up to 20mg/L did not exert toxic effect on the growth of C. vulgaris, rather an induction effect was evident. Unlike a linear decrease with 4-CP, no exact correlation between 2,4-DCP concentration and chl-a content of the cell was observed, but it was certain that the presence of 2,4-DCP caused some physiological changes in the cell of C. vulgaris. No biodegradation of 4-CP and 2,4-DCP was observed over a 30-day incubation.
authors.affiliation: Environmental Engineering Department, Middle East Technical University, 06531 Ankara, Turkey.
authors.forename: Erkan
authors.initials: E
authors.lastname: Sahinkaya
authors.forename: Filiz B
authors.initials: FB
authors.lastname: Dilek
mesh_terms: D000871:Anthelmintics / Q000633:toxicity*; D000891:Anti-Infective Agents, Local / Q000633:toxicity*; D048408:Chlorella vulgaris / Q000187:drug effects* / Q000254:growth & development / Q000378:metabolism; D002733:Chlorophenols / Q000633:toxicity*; D002734:Chlorophyll / Q000378:metabolism; D000077194:Chlorophyll A; D004305:Dose-Response Relationship, Drug; D004784:Environmental Monitoring / Q000379:methods; D014874:Water Pollutants, Chemical / Q000633:toxicity*
chemical_list: D000871:Anthelmintics; D000891:Anti-Infective Agents, Local; D002733:Chlorophenols; D014874:Water Pollutants, Chemical; D002734:Chlorophyll; C029107:4-chlorophenol; C004762:2,4-dichlorophenol; D000077194:Chlorophyll A