Journal of the Korean Industrial and Engineering Chemistry, Vol.14, No.1, 16-22, February, 2003
전기화학적으로 재생된 페놀함유 폐활성탄의 물성
Characteristics of Electrochemically Regenerated Activated-Carbon-Waste Containing Phenol
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초록
페놀을 함유한 폐활성탄 즉 WS-GAC, WC-GAC, WL-GAC 등을 지지전해질인 염화나트륨 용액 중에서 티타늄-이리듐(Ti-Ir) 전극(10 x 10 cm2)을 사용하여 정전위전해법으로 재생하였다. 폐 활성탄의 전해 재생실험은 100 mg/g 페놀을 함유한 시료에 전류밀도 1.25 A/dm2, 전해시간 120 min, 지지전해질 농도 즉 염화나트륨 1.0%용액에서 수행하였다. 전류밀도 2.50 A/dm2의 경우 메틸렌블루 탈색력은 142 mL/g이었고 전해 재생효율은 82.6%이었다. 전해 재생된 활성탄은 비표면적과 총 세공용적이 신활성탄에 비해 다소 낮았으나 평균 세공경은 23.7 ~ 24.8 Å로서 활성탄으로 재사용 가능성이 있음을 알 수 있었다.
WS-GAC, WC-GAC and WL-GAC of activated carbon wastes containing phenol were electrochemically regenerated with Ti-Ir electrode in sodium chloride solution as supporting electrolyte by potentiostatic method. Electrochemical regeneration of activated carbon waste was carried out with samples containing 100 mg/g phenol. Current density of 1.25 A/dm2 was applied during 120 min in 1.0% sodium chloride solution. Methylene blue decoloration power(MBDP) was 142 mL/g in 2.50 A/dm2 and electrolytic regeneration efficiency was 8.26%. Specific surface area and total pore volume of regenerated activated carbon were less than fresh activated carbon. However, the regenerated activated carbon has the possibility to reuse and its average pore diameter was 23.7 ~ 24.8 angstrom.
Keywords:methyleneblue decoloration power(MBDP);potentiostatic method;supporting electrolyte;electrochemical regeneration
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