고농도 수은 함유 페슬러지에서 수은의 열적감량 특성 (Thermal Degradation Characteristics of Mercury in Waste Sludge Containing High Concentrated Mercury)

서지정보

· 발행기관 : 한국폐기물자원순환학회
· 수록지 정보 : 한국폐기물자원순환학회지 / 31권 / 3호 / 300 ~ 306페이지
· 저자명 : 백승기, 서용칠, 성진호, 장하나, 김정훈, 김기헌, 김영란, 권민환

초록

This study provides a result of thermal mercury reduction for inventing a mercury recovery technology from the sludge which contains high concentration of mercury. Physical, chemical and thermal properties of the sludge were analyzed and mercury degradation at elevated temperatures was investigated to find out the optimum temperature range for thermal recovery of mercury from the sludge generated from an industrial facility, which contained high concentration of mercury.
The study was carried out in the temperature range of up to 650oC from 200oC, and 500 ~ 710 μm particle size of waste sludge samples were selected from such industries. As primary thermal tests the sludge was heated up to observe weight degradation at a continuous weight measurable thermogravimetric analyzer and a muffle furnace and the degradation curves from both devices were found to be well matched. Mercury conversion to gaseous form was investigated from the analyzed data of mercury concentrations sampled every 25oC from a muffle furnace. Cold vapor atomic absorption spectroscopy (CVAAS) Hg analyzer was used for the analysis of mercury content in solid and liquid samples. Most of mercury was degraded and released as gas phase at the temperature range from 300oC to 550oC, which could be the optimum temperature of mercury recovery by thermal method for the sludge containing high concentration of mercury.
Based on these thermal mercury reduction studies, degradation kinetics study of mercury was conducted to provide the reaction kinetics data for further reactor design to recover mercury using a thermal method.

영어초록

This study provides a result of thermal mercury reduction for inventing a mercury recovery technology from the sludge which contains high concentration of mercury. Physical, chemical and thermal properties of the sludge were analyzed and mercury degradation at elevated temperatures was investigated to find out the optimum temperature range for thermal recovery of mercury from the sludge generated from an industrial facility, which contained high concentration of mercury.
The study was carried out in the temperature range of up to 650oC from 200oC, and 500 ~ 710 μm particle size of waste sludge samples were selected from such industries. As primary thermal tests the sludge was heated up to observe weight degradation at a continuous weight measurable thermogravimetric analyzer and a muffle furnace and the degradation curves from both devices were found to be well matched. Mercury conversion to gaseous form was investigated from the analyzed data of mercury concentrations sampled every 25oC from a muffle furnace. Cold vapor atomic absorption spectroscopy (CVAAS) Hg analyzer was used for the analysis of mercury content in solid and liquid samples. Most of mercury was degraded and released as gas phase at the temperature range from 300oC to 550oC, which could be the optimum temperature of mercury recovery by thermal method for the sludge containing high concentration of mercury.
Based on these thermal mercury reduction studies, degradation kinetics study of mercury was conducted to provide the reaction kinetics data for further reactor design to recover mercury using a thermal method.

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