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2009 1

2008 1

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thermolysis 2

(PFOA) 1

SO/ZrO 1

Shengli 1

asphaltene 1

fluorochemical (FC) degradation technologies 1

oxidation 1

perfluoroctanesulfonate (PFOS) 1

perfluorooctanoate 1

photolysis 1

presence 1

reduction 1

review 1

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Visbreaking of heavy petroleum oil catalyzed by SO/ZrO solid super-acid doped with Ni or Sn

JING Ping, LI Qingbiao, HAN Mei, SUN Daohua, JIA Lishan, FANG Weiping

Frontiers of Chemical Science and Engineering 2008, Volume 2, Issue 2, Pages 186-190 doi: 10.1007/s11705-008-0035-y

Abstract: Both catalysts can promote thermolysis of heavy petroleum oil and the viscosity was reduced from 0.319

Keywords： thermolysis Shengli asphaltene SO/ZrO presence

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Treatment technologies for aqueous perfluorooctanesulfonate (PFOS) and perfluorooctanoate (PFOA)

Chad D. VECITIS, Hyunwoong PARK, Jie CHENG, Brian T. MADER, Michael R. HOFFMANN

Frontiers of Environmental Science & Engineering 2009, Volume 3, Issue 2, Pages 129-151 doi: 10.1007/s11783-009-0022-7

Abstract: Fluorochemicals (FCs) are oxidatively recalcitrant, environmentally persistent, and resistant to most conventional treatment technologies. FCs have unique physiochemical properties derived from fluorine which is the most electronegative element. Perfluorooctanesulfonate (PFOS), and perfluorooctanoate (PFOA) have been detected globally in the hydrosphere, atmosphere and biosphere. Reducing treatment technologies such as reverses osmosis, nano-filtration and activated carbon can? remove ?FCs ?from ?water. ?However,? incineration ?of the concentrated waste is required for complete FC destruction. Recently, a number of alternative technologies for FC decomposition have been reported. The FC degradation technologies span a wide range of chemical processes including direct photolysis, photocatalytic oxidation, photochemical oxidation, photochemical reduction, thermally-induced reduction, and sonochemical pyrolysis. This paper reviews these FC degradation technologies in terms of kinetics, mechanism, energetic cost, and applicability. The optimal PFOS/PFOA treatment method is strongly dependent upon the FC concentration, background organic and metal concentration, and available degradation time.

Keywords： technologies perfluoroctanesulfonate (PFOS) perfluorooctanoate (PFOA) oxidation reduction photolysis thermolysis