Mechanochemical degradation of chlorinated contaminants in fly ash with a calcium-based degradation reagent

Yoshiharu Mitoma; Hideaki Miyata; Naoyoshi Egashira; Alina Marieta Simion; Mitsunori Kakeda; Cristian Simion

doi:10.1016/j.chemosphere.2011.04.015

Mechanochemical degradation of chlorinated contaminants in fly ash with a calcium-based degradation reagent

Chemosphere. 2011 May;83(10):1326-30. doi: 10.1016/j.chemosphere.2011.04.015. Epub 2011 Apr 30.

Authors

Yoshiharu Mitoma¹, Hideaki Miyata, Naoyoshi Egashira, Alina Marieta Simion, Mitsunori Kakeda, Cristian Simion

Affiliation

¹ Department of Environmental Sciences, Faculty of Life and Environmental Sciences, Prefectural University of Hiroshima, 562 Nanatsuka-Cho, Shobara City, Hiroshima 727-0023, Japan. mitomay@pu-hiroshima.ac.jp

PMID: 21530996
DOI: 10.1016/j.chemosphere.2011.04.015

Abstract

This report presents our results in a low-temperature mechanochemical hydrodechlorination process applied to fly ash coming from a municipal waste incinerator in order to efficiently remove all traces of PCDDs, PCDFs and PCBs. We found that the most suitable degradation agent is a mixture of metallic calcium and calcium oxide. A sample of fly ash presenting a TEQ of 5200 pg g(-1) was completely detoxified (no traces of PCDDs, PCDFs and PCBs detected) after ball-milling at 400 rpm over night.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Air Pollutants / chemistry*
Air Pollution / prevention & control
Calcium / chemistry*
Calcium Compounds / chemistry
Carbon / chemistry*
Coal Ash
Incineration / methods*
Mechanical Phenomena
Metals / chemistry
Oxides / chemistry
Particulate Matter / chemistry*
Polychlorinated Biphenyls / chemistry
Polychlorinated Dibenzodioxins / analogs & derivatives
Polychlorinated Dibenzodioxins / chemistry

Substances

Air Pollutants
Calcium Compounds
Coal Ash
Metals
Oxides
Particulate Matter
Polychlorinated Dibenzodioxins
Carbon
lime
Polychlorinated Biphenyls
Calcium