Title of article :
Improvement in heavy metal removal from aqueous solution using polyetherimide nanofiltration membrane modified by coating approach
Author/Authors :
Sadeghipour ، Madineh Department of Chemistry - Faculty of Science - Yasouj University , Kheirmand ، Mehdi Department of Chemistry - Faculty of Science - Yasouj University , Asadi ، Azar Department of Applied chemistry - Faculty of Gas and petroleum - Yasouj University
From page :
87
To page :
93
Abstract :
This research focused on improving the antifouling properties and rejection performance of polyetherimide (PEI) nanofiltration membrane by chemical surface modification (surface coating). The hydrophilicity of the PEI nanofiltration membrane’s surface was enhanced by anchoring guanidine on its surface which the used dosage of guanidine wasconsidered as a variable (0.5, 1, and 1.5 g/L of guanidine concentration). ATR-FTIR, SEM, AFM, and water contact angle were used to characterize the surface-modified membranes. Also, dry milk powder solution was considered as an organic foulant to assess antifouling features of the fabricated membranes. According to the obtained results, the surface modified membrane with 0.5 g/L of guanidine concentration was the optimal surface-modified membrane with pure water flux (PWF) and flux recovery ratio (FRR) of 11.6 kg/m2.h and 88.8%, respectively. Moreover, the capabilities of the optimal surface-modified membrane and the pristine membrane for rejecting AS5+ and Hg2+ in aqueous solution with concentrations of 20 ppm and 50 mg/L were compared. Based on the obtained results, the optimal surface-modified membrane rejected more than 98.5 % of AS5+ and Hg2+ solutions with 20 and 50 mg/L of metal ion concentrations.
Keywords :
Polyetherimide , Surface modification , Guanidine , Heavy metal ions
Journal title :
Journal of Applied Research in Water and Wastewater (JARWW)
Journal title :
Journal of Applied Research in Water and Wastewater (JARWW)
Record number :
2736987
Link To Document :
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