Application of Fe3O4/Carbon Black Composite Activated Persulfate for Degradation of PAHs in the Harbor Sediment

• Main Authors: Yu-Jhe Jhuang, 莊育哲
• Other Authors: Chiu-Wen Chen
• Format: Others
• Language: zh-TW
• Published: 2016
• Online Access: http://ndltd.ncl.edu.tw/handle/82977466658198630512

碩士 === 國立高雄海洋科技大學 === 海洋環境工程研究所 === 104 === Due to polycyclic aromatic hydrocarbons (PAHs) are not easily break down, in the environment and easy to accumulate in sediments caused higher concentrations of PAHs in sediments.This study uses two catalytic material (Fe3O4 and Fe3O4/CB) combined persulfate oxidation degradation of PAHs in sediments. Research contents is divided into two parts: (a) application co-precipitation method and impregnation method synthesis catalytic materials, then using of XRD, ESEM/EDX, SQUID and FTIR were identified of materials properties; (b) designing to activation persulfate by catalytic materials, comprising: different dosage of material, concentration of persulfate, pH and temperature etc, to obtain the optimal condition of catalytic materials activation persulfate oxidation degradation of PAHs in sediments. By the XRD, ESEM/EDX, SQUID and FTIR identification of materials characteristics showed catalytic materials there were nanoscale characterization of Fe3O4 and magnetic. In persulfate oxidation system result showed that concentration in 1.7×10-5 M, pH 5.5 and temperature at 70℃was also the best experimental parameters can degradation of PAHs was 59.8%, the reaction results also follow pseudo-first-order euatiom, and the reaction rate was 0.0810 h-1. In catalytic material system result showed that Fe3O4 at doses of 3.33 g/L, the concentration of persulfate 1.7×10-5 M, pH 5.5 and temperature at 70℃ degradation of PAHs was 89.1%, and reaction rate was 0.1982 h-1; then using Fe3O4/CB can degradation of PAHs was 93.2%, and the reaction rate was 0.2455 h-1 in the same conditions, Fe3O4/CB there are higher surface area and surface functional group of carbon black,could catalytic persulfate raise degradation efficiency of PAHs. Finally, the research results could use advanced oxidation processes degradation of PAHs in sediment is a feasible way, and provide a reference way remediation PAHs in sediment in the future. Keywords: Sediment, Polycyclic Aromatic Hydrocarbons (PAHs), Persulfate, Fe3O4, Fe3O4/CB