| Summary: | 碩士 === 國立高雄海洋科技大學 === 海洋環境工程研究所 === 105 === Persistent organic pollutants (POPs) remain of concern and are prominent in environmental legislation because of their persistence, bioaccumulation potential and toxicity. This study uses magnetic carbon materials combined persulfate oxidation for degrading PAHs, PAEs, and APs in sediments. Research contents are divided into two parts: (a) co-precipitation synthesized catalytic materials were identified by XRD, ESEM/EDX, FTIR, TEM and SQUID; (b) persulfate activation by catalytic materials under various dosage of catalytic material, concentration of persulfate and pH, to obtain the optimal conditions in degradation of PAHs, PAEs, APs in sediments. Fe3O4, CB (Carbon Black) and Fe3O4/CB were characterized by the XRD, ESEM/EDX, SQUID, FTIR and TEM.
In persulfate oxidation system, results showed that under conditions of 1.7×10-5 M S2O82-, pH 6.0 and temperature at 303 K removal efficiencies achieved 16%, 28%, and 18% for PAHs, PAEs, and APs, respectively. In catalytic material system, results showed that Fe3O4 at doses of 3.33 g/L, using 1.7×10-5 M persulfate, pH 6.0 and temperature at 303 K, removal efficiencies of PAHs, PAEs and APs were 79%, 72% and 82%, respectively; then using CB can degrade 82%, 77% and 88% of PAHs, PAEs and APs, respectively; using Fe3O4/CB can degrade 89%, 81%, 90% of PAHs, PAEs and APs, respectively.
In this study, the efficiencies of organic contaminant degradation followed the order of Fe3O4/CB > CB > Fe3O4, which may be due to Fe3O4/CB the high surface area of CB integrated with catalytic reaction of Fe3O4. Finally, advanced oxidation processes of POPs in sediment a feasible in remediation of PAHs, PAEs and APs in sediment.
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