Decomposition of PCDD/Fs by mechanochemical means with calcium-based additives

被引：5

作者：

Wei Y.-L. ^{[1
]}

Yan J.-H. ^{[1
]}

Lu S.-Y. ^{[1
]}

Li X.-D. ^{[1
]}

机构：

[1] State Key Laboratory of Clean Energy Utilization, Zhejiang University

来源：

Zhejiang Daxue Xuebao (Gongxue Ban)/Journal of Zhejiang University (Engineering Science) | 2010年 / 44卷 / 05期

关键词：

Degradation; Eggshell; Mechanochemistry; PCDD/Fs;

D O I：

10.3785/j.issn.1008-973X.2010.05.026

中图分类号：

学科分类号：

摘要：

The mechanochemical decomposition of the virulent polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans (PCDD/Fs) in fly ash was studied by the planetary mill. The calcium-based additives such as waste eggshell powder/calcium carbonate were added as the reducing agent. The effects of the milling time and the rotation speed of the ball mill on the degradation efficiency of PCDD/Fs for the total mass fraction and I-TEQ concentration were investigated. The grinding products were characterized with their structure and size by using scanning electron microscope (SEM). Experimental results indicated that by using eggshell powder, more than 50% of the total mass fraction and I-TEQ concentration of PCDD/Fs were reduced when 8 h grinding was conducted. The degradation efficiency increases with an increase in rotation speed, and 300-400 r/min is appropriate for large-scale utilization. The destruction and dechlorination reaction occurred simultaneously in the mechanochemical treatment of PCDD/Fs.

引用

页码：991 / 997

页数：6

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