Synthesis and performance evaluation of PESchitosan membranes coated with polyamide for acid mine drainage treatment

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dc.citation.doi10.1038/S41598-019-53512-8en_ZA
dc.citation.epage14
dc.citation.spage1
dc.contributor.authorMathaba, M.
dc.contributor.authorDaramola, M.
dc.date.accessioned2020-09-30T22:45:00Z
dc.date.available2020-09-30T22:45:00Z
dc.date.issued2019-12-01
dc.description.abstractIn this article, performance evaluation of PES membrane infused with chitosan and coated with polyamide layer for treatment of acid mine drainage (AMD) is reported. PES/chitosan membranes were fabricated by varying chitosan concentration (0, 0.5, 0.75 and 1 wt%) using phase inversion method. PES/chitosan membranes were coated with polyamide (PA) via co-solvent assisted interfacial polymerization technique (CAIP). Scanning electron microscopy (SEM) and contact angle analysis show that chitosan and polyamide could enhance permeability without affecting rejection of the membrane. The permeability was improved with increasing chitosan content. Atomic absorption spectroscopy (AAS) was used to quantitatively determine cations in the permeate and the sulphate ions were analysed using ultraviolet and visible (UV-VIS) spectrophotometer. Pure water flux of PES/PA membrane was significantly improved from 56 to 93 l/m2.hr with 1 wt% chitosan addition. Cation rejection (90.4, 88.3, 89.3 and 75.7% for Mn2+,Fe2+, Mg2+ and Ca2+, respectively) was observed to be higher than anion rejection (56.33% for SO4 2−), when chitosan content was 0.75 wt%. These results indicate that the positively charged membranes under acidic condition had strong repulsive forces with the cations than attractions forces with anions. Polyethersulphone membrane modified with chitosan and coated with polyamide layer displayed potential for application in treatment of AMD.en_ZA
dc.description.librarianSP2020en_ZA
dc.description.sponsorshipNational Kidney Foundation of South Africaen_ZA
dc.facultyFaculty of Engineering & the Built Environmenten_ZA
dc.identifier.citationMachodi, M.J. and Daramola, M.O. 2019. Synthesis and performance evaluation of PES/chitosan membranes coated with polyamide for acid mine drainage treatment. Scientific Reports 9(1), Article number 17657.en_ZA
dc.identifier.issn2045-2322
dc.identifier.urihttps://hdl.handle.net/10539/29749
dc.journal.issue1en_ZA
dc.journal.titleSCIENTIFIC REPORTSen_ZA
dc.journal.volume9en_ZA
dc.language.isoenen_ZA
dc.publisherNature Researchen_ZA
dc.rights© The Author(s) 2019. This article is licensed under a Creative Commons Attribution 4.0 International License.en_ZA
dc.schoolSchool of Chemical and Metallurgical Engineeringen_ZA
dc.subjectNanofiltration Membranesen_ZA
dc.subjectThin Film Composite Membranesen_ZA
dc.subjectReverse Osmosisen_ZA
dc.titleSynthesis and performance evaluation of PESchitosan membranes coated with polyamide for acid mine drainage treatmenten_ZA
dc.typeArticleen_ZA
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