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Study on the Purification of Slag Containing Chromium by Microwave Radiation

Author: LiangBo
Tutor: NingPing
School: Kunming University of Science and Technology
Course: Environmental Engineering
Keywords: Chromium slag Microwave irradiation Detoxication
CLC: X705
Type: Master's thesis
Year: 2002
Downloads: 400
Quote: 8
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Abstract


Toxic chromium slag containing hexavalent chromium compounds , the serious pollution of the environment, harm to human health , is recognized by the U.S. EPA 129 types of dangerous pollutants . This is the first of a new micro - irradiated beryllium detoxification of chromium waste applied basic research , microwave irradiation of chromium waste detoxification mechanism discussed theoretically , to study the impact of the chromium slag detoxification effect of operating conditions , the effects of microwave power , irradiation time , the ratio of cinder amount of the conversion rate , the optimal operating conditions ; also on the stability of the detoxification of chromium slag by X- diffraction analysis showed that the detoxification slag hexavalent chromium has basically disappeared , chromium to trivalent form exists ; leaching toxicity test showed that the leaching solution of hexavalent chromium content of less than 0.2mg / L, lower than the national standards 1.5mg / L ( country label : GB5085.3-1996 ). The study results show that : chromium slag purification method using microwave irradiation which toxic hexavalent chromium into the basic non-toxic trivalent chromium conversion rate of 99 % or more .

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CLC: > Environmental science, safety science > Processing and comprehensive utilization of waste > General issues > Solid waste disposal and utilization
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