کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
584944 877901 2007 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Microwave enhanced stabilization of heavy metal sludge
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی بهداشت و امنیت شیمی
پیش نمایش صفحه اول مقاله
Microwave enhanced stabilization of heavy metal sludge
چکیده انگلیسی
A microwave process can be utilized to stabilize the copper ions in heavy metal sludge. The effects of microwave processing on stabilization of heavy metal sludge were studied as a function of additive, power, process time, reaction atmosphere, cooling gas, organic substance, and temperature. Copper leach resistance increased with addition of aluminum metal powder, with increased microwave power, increased processing time, and using a gaseous environment of nitrogen for processing and air for cooling [N2/air]. The organic in the sludge affected stabilization, whether or not the organic smoldered. During heating in conventional ovens, exothermic oxidation of the organic resulted in sludge temperatures of about 500 °C for oven control temperatures of 200-500 °C. After microwave heating dried the sludge, the sludge temperature rose to 500 °C. The reaction between copper ions and metal aluminum in the dried sludge should be regarded as a solid phase reaction. Adding aluminum metal powder and reaction temperature were the key parameters in stabilizing copper in the heavy metal sludge, whether heated by microwave radiation or conventional oven. The mass balance indicates insignificant volatization of the copper during heating.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Hazardous Materials - Volume 139, Issue 1, 2 January 2007, Pages 160-166
نویسندگان
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