Experimental Losses and Optimum Conditions for Phenanthrene Extraction

作     者：章真怡 Chihiro Inoue 李广贺 

作者机构：Department of Environmental Sciences and Engineering Tsinghua University Graduate School of Environmental Studies Tohoku University 

出 版 物：《Tsinghua Science and Technology》 (清华大学学报（自然科学版（英文版）)

年 卷 期：2010年第15卷第4期

页      面：414-417页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 070303[理学-有机化学] 0703[理学-化学] 

基　　金：Supported by the National Natural Science Foundation of China(No. 40730738) 

主　　题：polycyclic aromatic hydrocarbons extraction multiple microtube extraction experimental loss 

摘      要：Polycyclic aromatic hydrocarbons （PAHs） are a class of pollutants that are widespread in the en- vironment. Their hydrophobic properties make accurate analyses very difficult. In addition, the experimental losses during extraction of PAHs are inevitable and of great concern. In this study, dichloromethane （DCM）, chloroform （CF）, and carbon disulfide （CDS） were used as solvents to extract phenanthrene （PHN）, a typical PAH, at various temperature and pressure reduction conditions. The extraction was improved using a multi- ple microtube extraction methodology. The results indicate that the CDS had the best performance followed by CF and DCM at 25~C and standard pressure. This was ascribed to the intensity of the molecular interac- tions between the solvent, the water, and the PHN due to their different molecular structures leading to dif- ferent stereo and hydrogen bonding effects. The optimum conditions for extraction of PHN by CDS were determined by correlating the experimental results. The regression shows that the experimental loss rate is linearly proportional to the pressure reduction and exponentially related to the temperature. The correlation can be used to improve extraction efficiencies.