Quantitative recovery of high purity nanoporous silica from waste products of the phosphate fertilizer industry
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Date
2013-01-25
Authors
Elineema, Gideon
Kim, Jong Kil
Hilonga, Askwar
Shao, Godlisten Namwel
Kim, You-Na
Quang, Dang Viet
Sarawade, Pradip B.
Kim, Hee Taik
Journal Title
Journal ISSN
Volume Title
Publisher
Elsevier
Abstract
This study reports on the quantitative recovery of high purity nanoporous silica from wastes material (H2SiF6) of the phosphate fertilizer industry and Na2O·SiO2. The silica recovered from the wastes was compared with silica from the reaction of H2SO4 and Na2O·SiO2 because H2SO4 is commonly used. The product recovered from the wastes material and H2SO4 were 99.3% and 99.1% pure, respectively. The quantity recovered were 22.30 g and 20.11 g, respectively. The product had superior properties suitable for applications such as chromatography, reinforcing material for rubber and plastics. The process may significantly reduce the release of SiF4 gas into the environment.
Sustainable Development Goals
SDG 9: Industry, Innovation, and Infrastructure
SDG 12: Responsible Consumption and Production
SDG 13: Climate Action
Keywords
Nanoporous silica, Hexaflorosilicic acid, Sodium silicate