Dissolution behavior of selenium from coal fly ash particles for the development of an acid-washing process
作者： Shunsuke Kashiwakura , Hajime Ohno , Yuichi Kumagai , Hiroshi Kubo , Kazuyo Matsubae
DOI: 10.1016/J.CHEMOSPHERE.2011.06.099
关键词: Arsenic 、 Fly ash 、 Adsorption 、 Dissolution 、 Environmental chemistry 、 Scientific method 、 Elution 、 Chemistry 、 Waste management 、 Boron 、 Selenium
摘要: Abstract Coal fly ash emitted from coal-fired electric power stations generally contains environmentally regulated trace elements. In particular, boron, arsenic, and selenium have been recognized as troublesome elements because elutions the contain them. order to design an effective removal process for these elements, we developed investigated acid-washing process. The dissolution behavior of coal particles was focused on improvement process, found greatly depend pH acid solutions. species in solutions with a around 0–1 determined be H2SeO3. dissolved H2SeO3 transformed into HSeO 3 - adsorbed onto surface solution upon elevation pH. re-elution absorbed SeO 2 at 10 also confirmed, will cause elution excess acid-washed ash.
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