Effect of fly ash characteristics on the removal of Cu(II) from aqueous solution

Chien Jung Lin, Juu En Chang

Research output: Contribution to journalArticlepeer-review

62 Citations (Scopus)


Fly ash is a particulate substance containing metal oxides, carbon and other microelements. In this study, fly ashes with different quantities of carbon and minerals prepared by a thermal process in the laboratory were used as adsorbents to investigate the contribution of precipitation and adsorption to the removal of aqueous Cu(II). Experimental results showed that the specific surface area of fly ash increased linearly with the quantity of carbon. The specific surface areas of the carbon and mineral fraction were 60 m2/g and 0.68 m2/g, respectively. The specific adsorption capacities of carbon ranged from 2.2 to 2.8 mg Cu/g carbon, while those for mineral were only about 0.63 ∼ 0.81 mg Cu/g mineral. Consequently, the carbon fraction in fly ash was important in the removal of Cu(II) at Ph 5. However, Cu(II) removal owing to precipitation increases with a decreasing carbon fraction and the contribution of copper precipitation was estimated to be approximately 23% ∼ 82% of total removal, depending on the carbon fraction of fly ash.

Original languageEnglish
Pages (from-to)1185-1192
Number of pages8
Issue number5
Publication statusPublished - 2001 Aug 20

All Science Journal Classification (ASJC) codes

  • Environmental Engineering
  • Environmental Chemistry
  • General Chemistry
  • Pollution
  • Health, Toxicology and Mutagenesis


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