(181v) Removal of Hg2+ from Polluted Water Using Molecularly Ion-Imprinted Silica Particles (MIIP) As Fibrous Composite with Polysulfone Matrix
Herein, Hg-MIIP composite nanofiber (NF) was prepared by incorporating MIIP from dithizone (DTZ)-Hg2+ complex in polysulfone (PSf) as polymeric support. Hg-MIIP was synthesized via sol-gel process by chelating DTZ with Hg2+followed by growth of silica phase (SiO2), which serves as the bulk material for the templated structure. Dope solution of Hg-MIIP/PSf was then electrospun to produce the nanofibers. Hg2+ was acid-leached to prepare the activated MIIP immobilized in the PSf NF. The MIIP/PSf NF adsorbent was evaluated using different characterization techniques such as SEM-EDS, BET, thermogravimetric analysis, capillary flow porometry, and mechanical testing. Results showed that the static adsorption of Hg2+ on MIIP/PSf NF adsorbent was Langmuir-type while its rate of adsorption is adequately described by pseudo-second order rate model. Moreover, it presents excellent selectivity towards Hg2+, good stability, and reusability, which demonstrates its practical application for Hg2+ sequestration for wastewater treatment.
This research was supported by the National Research Foundation of Korea (NRF) funded by the Ministry of Science and ICT (No. 2017R1A2B2002109 and No. 2018R1D1A1B07047503) and by the Ministry of Education (No. 22A20130012051(BK21Plus)).