A feasibility study of the decontamination of 2,4-dichlorophenol in soil with zero-valent iron nanoparticles

• Main Authors: Te-wu CHen, 陳德武
• Other Authors: Jiann Yuan Ding
• Format: Others
• Language: zh-TW
• Published: 2008
• Online Access: http://ndltd.ncl.edu.tw/handle/78874888649205785243

碩士 === 輔英科技大學 === 環境工程與科學系碩士班 === 97 === The purpose of this study is to evaluate the efficiency and feasibility of decontamination of 2,4-dichlorophenol (2,4-DCP) in soil with zero-valent iron (ZVI) nanoparticles. The experiments of 2,4-DCP in aquatic and soil systems react with ZVI nanoparticles at different conditions were completed respectively. The results indicate that to reduce the initial pH of system by citric acid applied can improve the reductive dechlorination of 2,4-DCP. Sodium polyphosphate was regarded as the dispersing agent to separate the particles of ZVI nanoparticles and soil particles. In the both systems, the application of sodium polyphosphate can significantly increase the efficiency of decontamination of 2,4-DCP. And the excellent effect may be implicated in the increase of reactive sites owing to the dispersing particles of ZVI and soil. In addition, the application of cyclodextrin hydrate in the both systems just only improve few efficiency of decontamination of 2,4-DCP. To increase the application amount of ZVI nanoparticles in soil system can not increase proportionally the efficiency of decontamination of 2,4-DCP. That may be due to the pseudo-first order kinetics reaction of 2,4-DCP and ZVI nanoparticles. Briefly, the decontamination of 2,4-DCP in aquatic and soil systems with ZVI nanoparticles is a feasible scheme. To reduce the reaction time and the cost of the scheme will be considered in the actual application.