caa a22 4500 463170350 CHVBK 20180406164811.0 cr unu---uuuuu 170326e20070201xx s 000 0 eng 10.1007/s10450-007-9001-0 doi (NATIONALLICENCE)springer-10.1007/s10450-007-9001-0 Mixed silica and alumina hosted carboxylate oxide for removal of chromium species from wastewater [Elektronische Daten] [E. Borai, S. El-Dessouky, H. Hassan] Increasing in the use of various chromium species over the past few decades has inevitably resulted in an increased flux of their metallic substances in aquatic life. Therefore, experimental work was developed to improve the physical and chemical characteristics of the prepared mesoporous SiO2-Al2O3 mixed oxides via a sol-gel process. The effective key parameter on the properties of the materials was achieved by the addition of carboxylate functional group such as Alph-hydroxyl isobuteric acid (AHIBA) during the gelation process and prior the calcinations step. Better performance of these carboxylate resins are attributed to the complexing ability of the carboxylate groups toward polyvalent chromium species which is added to the normal sorption properties of the oxides. Urea has been used as a means of producing an aluminum precipitate that is easier to filter than that produced by rapid addition of base. Introduction of Al and Si salts together to form mixed oxide modified the way of their substitution in the hosting resin than when they were separately added. The data revealed that mesoporous materials with very narrow pore diameter distribution (micron-sized) and high surface area were obtained. The surface areas and pore size distributions were mainly depend on SiO2 content. Systematic investigations were carried out on the set of the prepared mixed oxides with different porosity, cross-linking degree and exchange loading to find out the best sorbent for chromium removal. The final objective in all cases was aimed at determining feasible and economically reliable solution to the environmental problems related to the tannery industry. Springer Science+Business Media, LLC, 2007 Modified silica and alumina nationallicence Cr(III) nationallicence Cr(VI) nationallicence Wastewater nationallicence Borai E. Hot Laboratories Center, Atomic Energy Authority, Cairo, Egypt aut El-Dessouky S. Hot Laboratories Center, Atomic Energy Authority, Cairo, Egypt aut Hassan H. Hot Laboratories Center, Atomic Energy Authority, Cairo, Egypt aut Adsorption Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 13/1(2007-02-01), 61-71 0929-5607 13:1<61 2007 13 10450 https://doi.org/10.1007/s10450-007-9001-0 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10450-007-9001-0 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Borai E. Hot Laboratories Center, Atomic Energy Authority, Cairo, Egypt aut NATIONALLICENCE 700 1- El-Dessouky S. Hot Laboratories Center, Atomic Energy Authority, Cairo, Egypt aut NATIONALLICENCE 700 1- Hassan H. Hot Laboratories Center, Atomic Energy Authority, Cairo, Egypt aut NATIONALLICENCE 773 0- Adsorption Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 13/1(2007-02-01), 61-71 0929-5607 13:1<61 2007 13 10450 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer