Concentration of Heavy Metals and PAHs in Sewage Sludge

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Research article

Journal of the Korean Society for Environmental Analysis 2008;11(4):275-281.

하수슬러지 중 중금속 및 PAHs의 함량 분석

박정민¹, 김민정², 김진필², 이상보², 권오상², 이상학³

¹국립환경연구원
²국립환경과학원
³경북대학교

Abstract

Although the production of sewage sludge increases every year, its proper treatment has only been recently raised as a new issue. This is because current landfill and ocean dumping arrangements are expected to sufferfrom proper management in the future. The Korean Ministry of the Environment (KMOE) plans to diversify its processing facilities and expand its processing systems by 2011, with the purpose of processing all produced sludge on land. This study reviews the characterics of PAHs and heavy metals in sewage sludge. The contents of heavy metals in sludge across five facilities decreased on the order of: copper > zinc >chrome > nickel > cadmium> mercury. In terms of heavy metal content in swage sludge, the sludge in facilities other than D with industrial water waste, was examined in order to satisfy the ocean contamination standard and fertilizer specifications. The results of the inspections of 16 PAHs showed that the total PAHs content in swage sludge averaged 6.10 mg/kg, with a high content in the sludge in city areas relative to industrial wastewater. This can be explained by the treatment of PAHs in wastewater treatment facilities, while it is not the came for household wastewater, rainwater, and road runoff water.

Key Words: sewage sludge, heavy metals, PAHs