Dual role of coal fly ash in copper ion adsorption followed by thermal stabilization in a spinel solid solution.

ABSTRACT: Coal fly ash is usually used as a cost-effective adsorbent for heavy metal removal, accumulating large amounts of spent coal fly ash that requires further disposal. In this study, fly ash that adsorbs copper with a maximum copper adsorption capacity of 48.8 mg g^-1 was further sintered at 900-1050 °C, and it was found that the copper is thermally incorporated in a spinel structure in aluminum- and iron-containing ceramic matrices provided by the fly ash. To further explore the immobilization mechanisms of copper in both aluminum- and iron-containing ceramic matrices like those in fly ash, two systems were prepared from CuO + Fe₂O₃ + kaolinite and CuO + Fe₂O₃ + Al₂O₃. A CuAl _x Fe_2-x

SUBMITTER: Wu P 

PROVIDER: S-EPMC9078617 | biostudies-literature | 2018 Feb

REPOSITORIES: biostudies-literature