Surface modification of a granular activated carbon by dielectric barrier discharge plasma and its effects on pentachlorophenol adsorption |
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| Authors: | Guang-Zhou Qu Jie Li Dong-Li Liang Dong-Lin Huang Dong Qu Yi-Mei Huang |
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| Institution: | 1. College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China;2. Key Laboratory of Plant Nutrition and the Agri-environment in Northwest China, Ministry of Agriculture, Yangling, Shaanxi, 712100, China;3. Institute of Electrostatics and Special Power, Dalian University of Technology, Dalian 116024, China |
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| Abstract: | The surface properties of a granular activated carbon (GAC) were modified by dielectric barrier discharge (DBD) plasma to enhance its adsorption capacity to pentachlorophenol (PCP). Surface characteristics and adsorption capacity of GAC before and after DBD plasma modification were investigated. Results showed that the surface of GAC after plasma modification, especially N2 plasma, became smoother and the particulates on virgin GAC's surface were eliminated due to deposit effect of plasma. The N2 plasma modification reduced the specific surface area and surface oxygen-containing functional groups of GAC. In contrast, O2 plasma modification increased the specific surface area and introduced oxygen-containing groups. |
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| Keywords: | Granular activated carbon Dielectric barrier discharge Adsorption Pentachlorophenol Modification |
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