Applied investigation on the interaction of hazardous elements binding on ultrafine and nanoparticles in Chinese anthracite-derived fly ash

Luis F.O. Silva, André Jasper, Maria L. Andrade, Carlos H. Sampaio, Shifeng Dai, Xiao Li, Tian Li, Weimei Chen, Xibo Wang, Huidong Liu, Lixin Zhao, Shelley G. Hopps, Robert F. Jewell, James C. Hower

Research output: Contribution to journalArticlepeer-review

63 Scopus citations

Abstract

A multifaceted instrumental approach was employed to determine the chemistry and mineralogy of pulverized-coal-combustion fly ashes from two Chinese power plants. Techniques included traditional optical microscopy, X-ray diffraction, and chemical analysis along with a variety of electron beam methods. The aim is to demonstrate and bring together the wide variety of procedures dealing with F as the key element of concern, and determining its location in the mineral nanoparticles. The Hg content of the Anwen (Songzao coalfield) fly ashes is higher than that of the Diandong (East Yunnan) fly ashes, possibly owing to the greater C and Cl in the Anwen fly ashes. Both fly ash sources contain a variety of amorphous and nano-crystalline trace-element-bearing particles, both associated with multi-walled carbon nanotubes and as particles independent of carbons.

Original languageEnglish
Pages (from-to)250-264
Number of pages15
JournalScience of the Total Environment
Volume419
DOIs
StatePublished - Mar 1 2012

Bibliographical note

Funding Information:
The research for this study was carried out with support from National Natural Science Foundation of China (nos. 40930420 and 40725008 ), the IPADHC and the Brazilians contracted Scientifics . Andre Jasper and Carlos H. Sampaio thanks FAPERGS and CNPq. Luis F. O. Silva and Kátia DaBoit benefited from a scholarship financed by CNPq (projects: 573531/2008-0 and 550996/2010-9).The SEM and HR-TEM research for this study was carried out with support from the IPADHC. The authors thank to the Electron Microscopy Center of the Federal University of Rio Grande do Sul for the analyses. Many thanks were given to Dr. Yongchun Zhao for providing the fly ash samples from Diandong Power Plant.

Keywords

  • Advanced characterization
  • Chinese coal fly ash
  • Nanominerals
  • Ultra-fine particles

ASJC Scopus subject areas

  • Environmental Engineering
  • Environmental Chemistry
  • Waste Management and Disposal
  • Pollution

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