Characterization of mechanochemical treated fly ash from a medical waste incinerator

The mechanochemical treatment of fly ash generated from a medical waste incinerator was subjected to grinding for 2 hr at 400 r/min in a planetary ball mill. The treated fly ash was characterized by a suite of analytical methods including High Resolution Gas Chromatograph/High Resolution Mass Spectr...

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Bibliographic Details
Published in:Journal of environmental sciences (China) 2010-10, Vol.22 (10), p.1643-1648
Main Authors: Peng, Zheng, Ding, Qiong, Sun, Yangzhao, Jiang, Chen, Gao, Xinhua, Yan, Jianhua
Format: Article
Language:English
Subjects:
Carbon
characterization
Chlorobenzenes - chemistry
Coal Ash
Enlargement
Fly ash
High resolution
Incineration
Incinerators
mechanochemical treatment
Medical wastes
Microscopy, Electron, Scanning
Particle size
Particulate Matter
PCDDs/Fs
Phases
Polychlorinated Dibenzodioxins - analogs & derivatives
Polychlorinated Dibenzodioxins - chemistry
Surface area
X-Ray Diffraction
医疗废弃物
多氯二苯并呋喃
扫描电子显微镜
机械力
焚化炉
粉煤灰
粒度分析仪
高分辨气相色谱
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Summary:The mechanochemical treatment of fly ash generated from a medical waste incinerator was subjected to grinding for 2 hr at 400 r/min in a planetary ball mill. The treated fly ash was characterized by a suite of analytical methods including High Resolution Gas Chromatograph/High Resolution Mass Spectrometer, Mastersizer 2000 Particle Size Analyzer, QUADRASORBTM SI Surface Area Analyzer, Scanning Electron Microscopy and X-ray diffraction. Results showed that abatement efficiency of polychlorinated dibenzo- p-dioxins and polychlorinated dibenzofurans （PCDDs/Fs） in terms of total concentration averagely amount to 76% which was relatively higher than that of I-TEQ concentration averagely amount to 56%; the most concentration of toxic congeners as well as isomers of PCDDs/Fs decreased after mechanochemical treatment. The treated fly ash was characterized by a more homogeneous distribution of concaves as well as the significant decreasing in overall particle size and great enlargement in surface area. The major crystallization phases or intensities were considerably changed by mechanochemical treatment, of which a new phase containing chlorine formed may be a possible factor suggesting chlorination reaction occurring on the crystalline surface.
ISSN:1001-0742
1878-7320
DOI:10.1016/S1001-0742(09)60301-6