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您的检索式：作者名="R.Hoffmann"
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| 1 | Treatment technologies for aqueous perfluorooctanesulfonate (PFOS) and perfluorooctanoate (PFOA)显示文摘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. | Chad D.VECITIS Hyunwoong PARK Jie CHENG Brian T.MADER Michael R.HOFFMANN | 2009 | Frontiers of Environmental Science & Engineering2009，3，2： | 26 |
| 2 | 超声波降解全氟辛烷磺酸和全氟辛酸的动力学显示文摘引言
全氟辛烷磺酸基化合物和全氟辛酸化合物是一类重要的全氟化表面活性剂,也是其他许多全氟化合物的重要前体。自20世纪60年代电化学氟化反应方法应用于全氟辛烷磺酸(PFOS)和全氟辛酸(PFOA)等全氟化合物的生产以来, | 赵德明 丁成 徐新华 Michael R.Hoffmann | 2011 | 化工学报2011，62，3： | 22 |
| 3 | Cone-Beam Micro-CT System Based on LabVIEW Software显示文摘 | Ciprian N.Ionita Keneth R.Hoffmann Daniel R. Bednarek | | 0，，03： | 1 |
| 4 | 用于治疗新生冠状动脉病变,以聚合物为基础的紫杉醇洗脱支架优于非聚合物基础的紫杉醇洗脱支架 | Iofina E. Langenberg R. Blindt R. R.Hoffmann 杜媛 | 2007 | 世界核心医学期刊文摘(心脏病学分册)2007，0，3： | 0 |
| 5 | Kinetics of microwave-enhanced oxidation of phenol by hydrogen peroxide显示文摘Aqueous solutions of phenol were oxidized by hydrogen peroxide assisted by microwave(MW)irradiation.A simple kinetic model for the overall degradation of phenol in the presence of excess H_(2)O_(2) is proposed in which the degradation rate of phenol is expressed as a linear function of the concentrations of phenol and H_(2)O_(2).A detailed parametric study showed that the degradation rate of phenol increased with increasing[H_(2)O_(2)]until saturation was observed.Phenol degradation followed apparent zero-order kinetics under MW radiation or H_(2)O_(2) oxidation.However,after 90 min of irradiation,the observed kinetics shifted to pseudo first order.The overall reaction rates were significantly enhanced in the combined MW/H_(2)O_(2) system,mainly because microwave could accelerate H_(2)O_(2) to generate hydroxyl radical(·OH)and other reactive oxygen intermediates.The observed synergetic effects of the MW/H_(2)O_(2) process resulted in an increased in the net reaction rate by a factor of 5.75.When hydrogen peroxide is present in a large stoichiometric excess,the time required to achieve complete mineralization is reduced significantly. | Deming ZHAO Jie CHENG Michael R.HOFFMANN | 2011 | Frontiers of Environmental Science & Engineering2011，5，1： | 0 |
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