Correlation Study of Toxicity of Substituted Phenols to River Bacteria and Their Biodegradability in River Water

作     者：XING YUAN GUANG-HUA LU LI-MIN SU 

作者机构：Department of Environmental Science Northeast Normal University Changchun 130024 Jilin China College of Environmental Science and Engineering Hohai University Nanjing 210098 Jiangsu China 

出 版 物：《Biomedical and Environmental Sciences》 (生物医学与环境科学（英文版）)

年 卷 期：2005年第18卷第5期

页      面：281-285页

核心收录：

学科分类：08[工学] 0815[工学-水利工程] 

基　　金：This research was supported by the Science Foundation of Education Ministry of China (No. 03058) and Science Foundation for YoungTeachers of Northeast Normal University (No. 20050503) 

主　　题：Biodegradability Toxicity Correlation Substituted phenols 

摘      要：To study the correlation of toxicity with biodegradability （BODT） in order to promote QSBR development and understand the degradation mechanism. Methods Toxicity of substituted phenols to river bacteria was determined by the turbidities that were measured using a spectrophotometer （UV-190） at 530 nm against a blank control. The biodegradability of substituted phenols was expressed as BODT and the DO concentrations were determined by the iodometric titration method. Results The BODT and toxicity（log 1/IC50） of 12 substituted phenols to bacteria from the Songhua River were determined respectively. The correlation of biodegradability with toxicity was developed： BODT=8.21 （±2.22） pKa -32.44 （±8.28） log 1/IC50 ＋89.04 （±38.20）, n=12, R^2=0.791, R^2（adj）=0.745, SE=9.134, F=17.066, P=0.001. Conclusion The BODT of substituted phenols was influenced by their toxicity and the ionization constant pKa. The stronger the toxicity, the less readily the compound was degraded by river bacteria.