Behavior of mercury release from iron ores during temperature-programmed heat treatment in air

Javzandolgor Bud; Yuuki Mochizuki; Naoto Tsubouchi

doi:10.1007/s11356-021-17002-7

Behavior of mercury release from iron ores during temperature-programmed heat treatment in air

Environ Sci Pollut Res Int. 2021 Dec;28(46):66496-66500. doi: 10.1007/s11356-021-17002-7. Epub 2021 Oct 19.

Authors

Javzandolgor Bud¹, Yuuki Mochizuki¹, Naoto Tsubouchi²

Affiliations

¹ Center for Advanced Research of Energy and Materials, Faculty of Engineering, Hokkaido University, Kita 13 Nishi 8, Kita-ku, Sapporo, 060-8628, Japan.
² Center for Advanced Research of Energy and Materials, Faculty of Engineering, Hokkaido University, Kita 13 Nishi 8, Kita-ku, Sapporo, 060-8628, Japan. tsubon@eng.hokudai.ac.jp.

PMID: 34665421
DOI: 10.1007/s11356-021-17002-7

Abstract

The behavior of Hg release from iron ores during temperature-programmed heat treatment (TPHT) in air is studied, primarily using an online monitoring method. The Hg release behavior during TPHT depends significantly on the type of ore being processed, involving the evolved forms, Hg⁰ and Hg²⁺, and those that remain thermally stable up to 950 °C. Furthermore, TPHT experiments for model Hg compounds suggest the presence of several types of Hg forms (HgCl₂, Hg₂Cl₂, HgS, HgO, HgSO₄, and associated mineral Hg) in the considered iron ores. The findings of this study provide insights for designing an efficient method for the removal of Hg from iron ore and gaseous Hg.

Keywords: Air; Heat treatment; Iron ore; Mercury; Release.

MeSH terms

Gases
Hot Temperature
Iron
Mercury Compounds*
Mercury*
Temperature

Substances

Gases
Mercury Compounds
Iron
Mercury