【摘要】 以自制海胆状CoCu双金属为催化剂,以过硫酸钠（SPS）为氧化剂,探索了该催化氧化体系对土壤中六氯联苯(PCB₁₅₃)的降解效果及影响因素,初步揭示了氧化机理.结果表明,CoCu-CN能高效催化SPS,30 min后PCB₁₅₃降解率达到80%;Cl^-或HCO^-₃对该体系的氧化性能产生抑制作用,抑制作用随着Cl^-或HCO^-₃浓度的增加而逐渐增强.X射线光电子能谱（XPS）表征与猝灭自由基反应表明,Cu⁰和Co²⁺是CoCu-CN+SPS体系中活化SPS的主要物质,SO■和·OH是两种最主要的活性物质.更多还原

【Abstract】 In this study, a sea urchin-like bimetallic material was synthesized as a catalyst（CoCu-CN） to active sodium persulfate（SPS） for the degradation of hexa-chlorobiphenyl(PCB₁₅₃) in the soil. In addition, the degradation efficiency and the oxidation mechanisms were also illustrated. The results show that a high degradation efficiency（80%） was obtained in the CoCu-CN+SPS system after 30 min. The presence of Cl^- or HCO^-₃ inhibited degradation rate of PCB₁₅₃ and this effect increased gradually with the increasing concentration of Cl^- or HCO^-₃. The results from X-ray photoelectron spectroscopy（XPS） spectra and quenching reactions suggest that the Cu⁰ and Co²⁺ were the dominant active species which could activate SPS to generate SO■ and ·OH for the degradation of PCB₁₅₃ in the CoCu-CN+SPS system.更多还原