The enrichment and removal of arsenic (III) from water samples using HFSLM |
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| Institution: | 1. Nanomaterials and Polymer Nanocomposites Laboratory, School of Engineering, University of British Columbia, Kelowna, BC V1V 1V7, Canada;2. Health Policy Research Center, Health Institute, Shiraz University of Medica Sciences, Shiraz, Iran;3. Department of Chemical Engineering, National Taiwan University of Science and Technology, Taiwan;4. Department of Environmental Science and Engineering, Faculty of Natural Resources, University of Tehran, Karaj, Iran;5. Department of Pathology, Medical School, Shiraz University of Medical Sciences, Shiraz, Iran;6. Clinical Education Research Center, Shiraz University of Medical Sciences, Shiraz, Iran;7. Department of Mechanical Engineering, Center for Nanofibers and Nanotechnology, National University of Singapore, Singapore;1. School of Metallurgy and Environment, Central South University, Changsha, 410083, China;2. School of Materials and Chemical Engineering, Hunan City University, Yiyang, 413000, China;1. Chemistry Department, Faculty of Science, Fayoum University, 63514 Fayoum City, Egypt;2. Chemistry Department, Al-Quwayiyah College of Science and Humanities, 11971, Shaqra University, Saudi Arabia;3. Biology Department, Al-Quwayiyah College of Science and Humanities, 11971, Shaqra University, Saudi Arabia;4. Hot Laboratory Center, Nuclear Fuel Technology Department, Atomic Energy Authority, Cairo, Egypt;1. Department of Nanoscience and Nanotechnology-DoNST, Advanced Institute for Science and Technology (AIST), Hanoi University of Science and Technology (HUST), 01 Dai Co Viet Street, Hai Ba Trung District, Hanoi 10000, Viet Nam;2. Faculty of Chemistry and Environment Technology, Hung Yen University of Technology and Education, Khoai Chau, Hung Yen, Viet Nam;3. School of Materials Science and Engineering, Hanoi University of Science and Technology, Hanoi 10000, Viet Nam;4. International Training Institute for Materials Science (ITIMS), Hanoi University of Science and Technology, Hanoi 10000, Viet Nam;5. Vietnam Metrology Institute, 08 Hoang Quoc Viet Road, Cau Giay District, Hanoi, Viet Nam;6. Department of Physics, University of South Florida, Tampa, FL 33620, USA;7. BCMaterials Edificio Nº. 500, Parque Tecnológico de Vizcaya, Derio 48160, Spain;8. Saigon University (SGU), 273 An Duong Vuong Street, Ward 3, District 5, Ho Chi Minh City, Viet Nam |
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| Abstract: | At specific concentrations oxyanions such as arsenic pose a major threat to human beings and to the environment because of their ability to biomagnify. The World Health Organization has set the drinking water standard at 10 μg l?1 for arsenic. It is in this regard that novel and cheaper methods to detect oxyanions and remove them from the environment are developed. In this work, we have developed sample preparation methods involving solid phase and liquid membrane for the extraction and enrichment of these oxyanions in aqueous environments. Various parameters which govern their optimal extraction and enrichment have been optimised. The manipulation of the liquid membrane extraction process was utilised to selectively extract arsenic (III) which is more toxic as compared to arsenic (V). The liquid membrane consisted of a combination of two organic solvents, and n-undecane and di-n-hexyl ether were used in a combination at various ratios of the two liquid membranes. The means of detection was by graphite furnace atomic absorption spectroscopy (GFAAS) as well as inductively coupled plasma optical emission spectroscopy (ICP-OES). The applicability of the method was tested in real wastewater samples where it was able to remove at least 50% of As (III) with enrichment factors of up to 20. |
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