Stabilization/Solidification of Arsenic-Contaiminated Soil with Cement and Activated Carbon

• Main Authors: Yun-Shin Hsieh, 謝運行
• Other Authors: Tien-Chin Chang
• Format: Others
• Language: zh-TW
• Published: 2012
• Online Access: http://ndltd.ncl.edu.tw/handle/j6829g

碩士 === 國立臺北科技大學 === 環境工程與管理研究所 === 100 === This study aims to investigate the leaching characteristics of heavy metal concentrations both by the stabilization with the impregnation of different materials of activated carbon to deal with high arsenic contamination of soil samples, and by observing different parameters ratio after the TCLP leaching test in the high arsenic soil samples. The results show that excessive heavy metals, such as mercury, copper and chromium after being cured can satisfy the standard concentration of the TCLP leaching test, only arsenic can’t meet the standard. On the other hand, this study observes the effects of each parameter via the dissolution percentage. Study results showed that sodium bromide and sulfur content added with higher activated carbon will cause both arsenic and nickel to be greatly adsorbed by activated carbon from soil samples. Furthermore, activated carbon added more than 5% will result in the collapse of the solidification. From dissolution of the effectiveness of heavy metals such as arsenic and nickel in the same condition parameter ratio, we also found dissolution percentage of 7-day maintenance time was even lower than that of 28-day. This study further found that the suppression effect of containing sodium bromide activated carbon to lead is fantastic. The effect will be even better if reducing cement parameters ratio and enhancing activated carbon parameter ratio. Meanwhile, the effect of adding sulfur-containing activated carbon into zinc and copper is awesome too, especially while 20% cement parameters ratio, combined with 5%, 10% or 15% activated carbon for 28-day maintenance can inhibit zinc and copper dissolution percentage below 5% and 0.5%.