Experimental Study on Behavior and Mechanism of Adsorption of Pentachlorophenol on HematiteFANG Ji-min1,LI Shan-hu1,GONG Wen-qi1,SUN Zhen-ya1,2,WANG Zhi-quan1 (1.School of Resource and Environmental Engineering,Wuhan University of Technology,Wuhan 430070,China;2.Center for Materials Research and Analysis,Wuhan University of Technology,Wuhan 430070,China)The largest adsorption quantity of pentachlorophenol(PCP) onto hematite occurred at about pH 6 was obtained by the static state adsorption experiments.The adsorption quantity at pH 8.5 of the isoelectric point of hematite was about 31% of the largest adsorption quantity.The adsorption mechanism of hematite and pcp was mainly hydrogen bond and surface complex reaction at pHzcp of 8.5 and was static electric interaction at largest adsorption quantity.The FTIR analysis of the change before and after the adsorption of pentachlorophenol on hematite indicated that C—O of pentachlorophenol and hydroxyl on the surface of hematite interacted mainly with electric charge-dipole moment as well as hydrogen bond,which played an important role in adsorption.hematite;pentachlorophenol;pH adsorption isotherm;FTIR;adsorption mechanism