Effect of activated carbon in PSF-PEI-Ag symmetric membrane Khairul Anwar Mohamad Said, Genevieve Gadung George, Nurul Ain Mohamed Alipah, Nor Zakirah Ismail and Ramizah Liyana Jama’in MATEC Web Conf., 87 (2017) 03008 Published online: 12 December 2016 DOI: 10.1051/matecconf/20178703008