Removal of natural organic matter in water using functionalised carbon nanotube buckypaper |
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| Affiliation: | 1. Laboratory for Sustainable Technology, School of Chemical and Biomolecular Engineering, The University of Sydney, NSW 2006, Australia;2. Australian Nuclear Science and Technology Organisation, Lucas Heights, NSW 2234, Australia;3. School of Chemical and Biomolecular Engineering, The University of Sydney, NSW 2006, Australia;4. Applied and Plasma Physics Group, School of Physics, The University of Sydney, NSW 2006, Australia;1. Departamento de Física/I3N, Universidade de Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal;2. CENIMAT/I3N, Departamento de Ciência dos Materiais, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa e CEMOP/UNINOVA, 2829-516 Caparica, Portugal;1. School of Chemistry, University of Wollongong, Australia;2. Australian Nuclear Science and Technology Organisation, Lucas Heights, Australia;3. Soft Materials Group, School of Chemistry and ARC Centre of Excellence for Electromaterials Science, AIIM Facility, University of Wollongong, Australia;4. Strategic Water Infrastructure Laboratory, School of Civil, Mining and Environmental Engineering, University of Wollongong, Australia;1. Faculty of Aerospace Engineering, Shenyang Aerospace University, Shenyang, 110136, China;2. School of Engineering, University of South Australia, Mawson Lakes, SA, 5095, Australia;3. Department of Mechanical Engineering, Faculty of Engineering, Benha University, Egypt;1. School of Aerospace Engineering, Shenyang Aerospace University, Shenyang 110136, China;2. Key Laboratory of Fundamental Science for National Defense of Aeronautical Digital Manufacturing Process, China;1. National Center for Nanoscience and Technology, China, Beijing 100190, China;2. University of the Chinese Academy of Sciences, Beijing 100049, China;3. University of Science and Technology of China, Hefei 230027, China |
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| Abstract: | A simple, surfactant-free assembly process was used to prepare multi-wall carbon nanotube (CNT) buckypapers using a highly efficient purification, sonication, and filtration process. To achieve effective dispersion of CNT into ethanol, a minimum 5-min sonication time was required. Here, we fabricated a buckypaper with pore size of 41 ± 10 nm and porosity of 72.9% with a 10-min sonication. The as-prepared buckypaper was used as a membrane for humic acid (HA) removal from water. During purification process, carboxylic and hydroxylic functional groups were introduced onto the CNT surface. The functional groups increased the hydrophilicity of the CNTs and improved the removal efficiency of HA by the buckypaper. The buckypaper prepared from purified CNTs exhibited excellent removal of HA (>93%) and a long lifetime for filtration. |
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