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Kinetics of phthalate ester biodegradation by Chlorella pyrenoidosa
Author(s) -
Yan Hai,
Ye Changming,
Yin Chengqing
Publication year - 1995
Publication title -
environmental toxicology and chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.1
H-Index - 171
eISSN - 1552-8618
pISSN - 0730-7268
DOI - 10.1002/etc.5620140602
Subject(s) - chlorella pyrenoidosa , biodegradation , diethyl phthalate , dimethyl phthalate , phthalate , dibutyl phthalate , bioconcentration , chemistry , kinetics , chromatography , nuclear chemistry , organic chemistry , chlorella , botany , algae , biology , bioaccumulation , physics , quantum mechanics
Experimental results show that Chlorella pyrenoidosa has an ability to accumulate and biodegrade phthalate esters. Bioconcentration factors of dimethyl phthalate (DMP), diethyl phthalate (DEP), and dibutyl phthalate (DBF) reached their maxima of 162 at 24 h, 205 at 12 h, and 4,077 at 12 h. The average biodegradation rates of DMP, DEP, and DBF per day were found to be 13.4 mg/L, 7.3 mg/L, and 2.1 mg/L, respectively. Based on the experimental data, a second‐order kinetic equation was formulated as ‐ d C /d t = KNr , with a factor r indicating the rate of algal growth. Calculation of this equation fits well with the observed data, and the standard deviations between calculated and observed values were 1.72 mg/L, 1.80 mg/L, and 0.26 mg/L for DMP, DEP, and DBF, respectively.