5TH International Congress on Technology - Engineering & Science - Kuala Lumpur - Malaysia (2018-02-01)

Synthesis And Self-assembly Process Of Aqueous Silica Hybrids And Their Application For Sustainable Environmental Remediation

The development of new functionalized materials with increased performance is growing to meet the regulatory standards in response to public concerns for environment. This research work is an effort in this direction and describes the synthesis, characterization, and application of functionalized silica hybrids keeping the perspective of recent technological advancements. The objective of present research is mostly driven by inadequate control of increasing concentration of toxic pollutants in environmental compartments. The synthesized products are grouped as Monodispersed ORMOSILS (VO, PO, MO) and the resulting hybrid materials are thoroughly characterized to determine the surface and bulk properties and to develop understanding of intricate relationship of structural artifacts with its functionalities as adsorbents for metal ions from aqueous media. The determination of monodispersity is a characteristic feature of ORMOSILS. It is maintained throughout the bulk as a distinct geometrical arrangement. To attain this characteristic, a number of factors are critically evaluated in the present synthesis. The adsorption results on Monodispersed ORMOSILS indicates a general increase in removal potential with increasing time. ORMOSILS members are observed to have maximum adsorption potential for chromium (98%) and least for mercury (78%). However, there is a shift over in the mid-order sequence for lead and arsenic. VO shows more adsorption for earlier than later metal, whereas reverse order is noted for PO. It might suggest that organic moiety having saturation (vinyl group) and unsaturation with conjugation (phenyl group) provides better binding to divalent (Pb+2) and trivalent (As+3) ions, respectively.
Saima Nasreen, Uzaira Rafique, Sheryl Ehrman