Sustainable production of pure silica from rice husk waste in Kazakhstan

S. Azat, A. V. Korobeinyk, K. Moustakas, V. J. Inglezakis

Research output: Contribution to journalArticlepeer-review

29 Citations (Scopus)

Abstract

This study aimed at developing a new synthesis method for the production of high purity silica from rice husks originated from different regions of Kazakhstan. The proposed eco-friendly method is compared with the conventional one reported in the literature which is accompanied by the use of significant amount of inorganic alkali and acids and direct combustion. In order to reduce the environmental impact, the mineral acid pre-treatment stage was either removed or replaced with organic acid pre-treatment, which reduced the amount of chemicals used during the synthesis and treatment process. The calcination temperature of 600 °C was selected based on thermogravimetric analysis. The average purity of silica samples obtained via different methods ranged from 84.81 to 99.66 wt%. The purity of the produced silica by use of the greener method was high reaching 98.67% with surface area up to 625 m 2 /g.

Original languageEnglish
Pages (from-to)352-359
Number of pages8
JournalJournal of Cleaner Production
Volume217
DOIs
Publication statusPublished - Apr 20 2019

Keywords

  • Agricultural waste
  • Rice husk
  • Rice husk ash
  • Silica
  • White rice husk

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Environmental Science(all)
  • Strategy and Management
  • Industrial and Manufacturing Engineering

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