Research On The Preparation And Support Of α-Fe₂O₃ And It's Effect To The PCP

As a kind of persistent organic pollutants pentachlorophenol (PCP) has become one of the global environmental pollutants.Currently, the main treatment of PCP includes: biological method , fenton reaction photochemical method , electrodeposition, ozone treatment , ultrasonic, metallocene catalysts.Especially for the metallocene catalysts,it's gentle reaction factor , quickly reaction speed , no choise to the retrogradation, obvious effects to organic matter which is difficult to retrogradaty by biological method. Currently, the hotspot research is to find the second generation photocatalytic which can photocatalysis in the Visible light.Because of pentachlorophenol (PCP)'s widely distributed in the water environment, lasting harm to the hunman and environment and the α -Fe₂O₃ 's great ability of photocatalysis in the visible region, it has great important environmental significance of Study on adsorption and photocatalysis of PCP on α-Fe₂O₃.This paper choose pentachlorophenol (PCP) as our boject of study,such as it's adsorption and photocatalysis on α-Fe₂O₃.The major study events is as follows: 1.Preparated the α-Fe₂O₃ by precipitation, characterizated it by BET,IR, XRD and Laser Particle Sizer.Fixed the α-Fe₂O₃ by Silicone-Acrylic Latices. Preparated the α -Fe₂O₃ by HTO.Through the hockproof test, the result is that α-Fe₂O₃ by the HTO not only has easy preparation and stable purity, but also has lower lose weight in the shockproof test.So it can resolve the difficult problem of catalyst fixing effectively. 2.Study on the adsorption kinetics, adsorption isotherm and protonation contants, conclude the mechanism of adsorption by IR. The result is that the ability of electrostatic adsorption is larger than surface complex absorption on α-Fe₂O₃,and the electrostatic adsorption is main.Langmuir adsorption balance can better describe adsorption of PCP on α -Fe₂O₃, the mechanism of adsorption may be is that the hydroxyl radical in the atoms of iron in the α-Fe₂O₃ adsorb with hydroxyl radical of PCP, then do the dehydration .3.study on comparison of formation rate of hydrogen peroxide and ability of photocatalysis in α-Fe₂O₃/UV/H₂O₂/PCP, α-Fe₂O₃/Visible light/H₂O₂/PCP , α -Fe₂O₃/UV/PCP and α-Fe₂O-3/Visible light/PCP. The result is that it has greater...