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《环境科学学报(英文版)》 2007-07
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Quantitative structure-activity relationship study on the biodegradation of acid dyestuffs

LI Yin, XI Dan-li College of Environmental Science and Engineering, Dong Hua University, Shanghai 201620, China.  
Quantitative structure-biodegradability relationships (QSBRs) were established to develop predictive models and mechanistic explanations for acid dyestu?s as well as biological activities. With a total of four descriptors, molecular weight (MW), energies of the highest occupied molecular orbital (EHOMO), the lowest unoccupied molecular orbital (ELUMO), and the excited state (EES), calculated using quantum chemical semi-empirical methodology, a series of models were analyzed between the dye biodegradability and each descriptor. Results showed that EHOMO and MW were the dominant parameters controlling the biodegradability of acid dyes. A statistically robust QSBR model was developed for all studied dyes, with the combined application of EHOMO and MW. The calculated biodegradations fitted well with the experimental data monitored in a facultative-aerobic process, indicative of the reliable prediction and mechanistic character of the developed model.
【Fund】: Project supported by the Natural Science Foundation of Shanghai China(No. 06ZR14002).
【CateGory Index】: X788
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