link

https://iopscience.iop.org/article/10.1088/2053-1591/ab03fa/meta

Materials Research Express 6 (5), 055313

Meghmik Manoukian, Hossein Fashandi, Hossein Tavakol

Abstract

In this study, membrane technology is adopted as a promising technique for dye wastewater purification. Highly uniform carbon spheres (CSs) with high surface area of 1791.5 m 2 g− 1 were synthesized through modified Stöber method using resorcinol and formaldehyde as precursors. The synthesized CSs were activated using CO 2 to produce highly uniform activated CSs (HUACSs) with negative charges as demonstrated by zeta potential measurements. Polysulfone-HUACS mixed-matrix membranes (PSf-HUACS MMMs) with different HUACS contents, ie 0.5, 1, 3, 5 and 7% with respect to the PSf weight, were produced through wet casting of PSf/Dimethylformamide (DMF)/HUACS dope. The potential of the produced MMMs to efficiently purify methylene blue wastewater with relatively high concentration of 200 ppm was investigated. It was demonstrated that regardless of ACS content, all MMMs exhibit