Arsenate removal from aqueous solutions using micellar-enhanced ultrafiltration
Autor: | Saeed Dehestani Athar, Reza Rezaee, Pegah Bahmani, Fardin Gharibi, Amir Hossein Mahvi, Afshin Maleki, Mehrdad Khamforoush, Gordon McKay, Hiua Daraei |
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Rok vydání: | 2018 |
Předmět: |
Environmental Engineering
Health Toxicology and Mutagenesis Ultrafiltration chemistry.chemical_element 02 engineering and technology 010501 environmental sciences 01 natural sciences Applied Microbiology and Biotechnology law.invention chemistry.chemical_compound 020401 chemical engineering law 0204 chemical engineering Phase inversion (chemistry) Waste Management and Disposal Filtration Arsenic 0105 earth and related environmental sciences Water Science and Technology Aqueous solution Public Health Environmental and Occupational Health Arsenate Polyacrylonitrile Pollution Membrane chemistry Nuclear chemistry Research Article |
Zdroj: | Journal of environmental health scienceengineering. 17(1) |
ISSN: | 2052-336X |
Popis: | In this study, arsenate (As-V) removal using micellar enhanced ultrafiltration (MEUF) modified by cationic surfactants was studied by a dead-end polyacrylonitrile (PAN) membrane apparatus. The UF membrane has been produced by a phase inversion process. The prepared membrane was characterized and analyzed for morphology and membrane properties. The influence of operating parameters such as initial concentrations of As-V, surfactants, pH, membrane thickness, and co-existing anions on the removal of As-V, surfactant rejection, and permeate flux have been studied. The experimental results show that from the two different cationic surfactants used the CPC (cetyl-pyridinium chloride) efficiency (91.7%) was higher than that of HTAB (hexadecyltrimethyl-ammonium bromide) (83.7%). The highest As-V removal was 100%, and was achieved using initial feed concentrations of 100–1000 μg/L(,) at pH 7 with a membrane thickness of 150 μm in a dead-end filtration system. This efficiency for As-V removal was similar to that obtained using a cross-flow system. Nevertheless, this flux reduction was less than the reduction achieved in the dead-end filtration process. The PAN fabricated membrane in comparison to the RO and NF processes selectively removed the arsenic and the anions, in the water taken from the well, and had no substantial effect on the cations. |
Databáze: | OpenAIRE |
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