In this study, leaching and content tests of hazardous substances were analyzed to evaluate their recyclability to paper sludge and paperboard products. These findings were compared with standard controlled waste. In addition, the stability of these products was examined with respect to the recommended standards for heavy metal content in packaging materials. In the leaching test results, no regulated items were detected. Upon examining the stability of paperboard products, it was detected within the standard of most samples. Paper sludge usage accounts for only about 10% of paperboard raw materials. Therefore, harmful substances in paper sludge is not a problem, Leaching and content tests of harmful substances in the antifoaming agent used were investigated within the limits of all items. The pH of the paper sludge corrugated cardboard, and antifoaming agent was 7.49, 7.21, and 7.87, respectively. Therefore, these wastes did not account for the corrosiveness. In addition, there were no hazardous characteristics found for leaching, because all specified waste standards were satisfied.

• 연진모(국립환경과학원 자원순환연구과) | Jin-Mo Yeon (Resource Recirculation Research Division, National Institute of Environmental Research)
• 정다위(국립환경과학원 자원순환연구과) | David Chung (Resource Recirculation Research Division, National Institute of Environmental Research)
• 엄남일(국립환경과학원 자원순환연구과) | Namil Um (Resource Recirculation Research Division, National Institute of Environmental Research) Corresponding author
• 정미정(국립환경과학원 자원순환연구과) | Mi-Jeong Jeong (Resource Recirculation Research Division, National Institute of Environmental Research)
• 김기헌(국립환경과학원 자원순환연구과) | Ki-Heon Kim (Resource Recirculation Research Division, National Institute of Environmental Research)
• 신선경(국립환경과학원 자원순환연구과) | Sun-Kyoung Shin (Resource Recirculation Research Division, National Institute of Environmental Research)