| Summary: | 碩士 === 國立高雄海洋科技大學 === 海洋環境工程研究所 === 106 === Persistent organic pollutants (POPs) remain of concern and are prominent in environmental legislation because of their persistence, bioaccumulation potential, and toxicity. This study uses Fe-Ce-supported water chest shell biochar composite-activated (Fe-Ce/WCSB) persulfate oxidation for degrading PAEs in sediments. Research contents are divided into two parts: (a) synthesis of catalytic materials by co-precipitation and impregnation and analysis of synthesized materials by ESEM/EDX, XRD, and FTIR, and (b) evaluation of the performance of Fe-Ce and Fe-Ce/WCSB-activated persulfate for the degradation of PAEs in sediments by varying dosage of catalytic material, concentration of persulfate, and pH.
The results of the characterization of the synthesized catalysts showed that Fe2O3 and CeO2 are the metal compounds found on the surface of the composite biochar. In persulfate oxidation system, the results showed that PAEs removal efficiencies achieved 50% under 1×10-5 M S2O82-, pH 6.0, and temperature at 303 K, respectively. In heterogeneous catalytic system, results showed that removal efficiencies of PAEs were 79% with added 1.67 g/L Fe-Ce (6:4) composite metallic Oxides under the same reaction conditions and 93% with 1×10-5 M S2O82- and 1.67 g/L Fe-Ce/WSB at pH 2.0. From the results of the studies, it is known that using advanced oxidation processes to treat POPs-enriched sediments is a feasible.
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