Recent advances in methods for recovery of cenospheres from fly ash and their emerging applications in ceramics, composites, polymers and environmental cleanup

Virendra Kumar Yadav, Krishna Kumar Yadav, Vineet Tirth, Ashok Jangid, G. Gnanamoorthy, Nisha Choudhary, Saiful Islam, Neha Gupta, Cao Truong Son, Byong Hun Jeon

Research output: Contribution to journalReview articlepeer-review

30 Scopus citations

Abstract

Coal fly ash (CFA) is a major global pollutant produced by thermal power plants during the generation of electricity. A significant amount of coal fly ash is dumped every year in the near vicinity of the thermal power plants, resulting in the spoilage of agricultural land. CFA has numerous value-added structural elements, such as cenospheres, plerospheres, ferrospheres, and carbon particles. Cenospheres are spherical-shaped solid-filled particles, formed during the combustion of coal in thermal power plants. They are lightweight, have high mechanical strength, and are rich in Al-Si particles. Due to cenospheres’ low weight and high mechanical strength, they are widely used as ceramic/nanoceramics material, fireproofing material, and in nanocomposites. They are also used directly, or after functionalization, as an adsorbent for environmental cleanup—especially for the removal of organic and inorganic contaminants from wastewater. By utilizing this waste material as an adsorbent, the whole process becomes economical and eco-friendly. In this review, we have highlighted the latest advances in the cenospheres recovery from fly ash and their application in ceramics and wastewater treatment.

Original languageEnglish
Article number1067
JournalCrystals
Volume11
Issue number9
DOIs
StatePublished - Sep 2021

Keywords

  • Alumino-silicate
  • Cenospheres
  • Ceramics
  • Coal fly ash
  • Ferrospheres

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