• 关键词：渗滤液  臭氧催化氧化  O₃与COD质量比  催化剂与COD质量比

• 基金项目：国家水体污染控制与治理科技重大专项(No.2008ZX07207-009-02)

• 吴晓燕
• 吉林建筑工程学院水污染控制与资源化吉林省重点实验室, 长春 130021

• 尹军
• 吉林建筑工程学院水污染控制与资源化吉林省重点实验室, 长春 130021

• 蒋宝军
• 吉林建筑工程学院水污染控制与资源化吉林省重点实验室, 长春 130021

• 摘要：通过制备以γ-Al₂O₃为载体的铬、镉、钴、铜、镍5种催化剂,研究了催化剂负载率对臭氧吸收率的影响以及臭氧催化氧化垃圾渗滤液时水质的变化情况.试验结果表明,钴在γ-Al₂O₃载体上具有较强的负载性,在催化剂与COD质量比为5,O₃与COD质量比分别为0.11、0.15、0.26时,镉催化剂能使臭氧吸收率提高,而铬催化剂则不利于臭氧的吸收;固定催化剂与COD质量比为5,当O₃与COD质量比为0.15时,铜催化剂可使COD去除率提高20.2%;同样固定催化剂与COD质量比为5,当O₃与COD质量比为0.26时,镍催化剂有利于氨氮的去除,可使氨氮去除率提高20.7%;臭氧催化氧化时,臭氧的最佳投加量可按O₃与COD质量比为0.125考虑.

• Abstract：We studied the effect of catalyst loading on the ozone absorption rate and the water quality after catalytic ozonation of landfill leachate using five catalysts:chromium,cadmium,cobalt,copper and nickel loaded on γ-Al₂O₃.The experiments indicate that cobalt has the highest loading rate.Under our experimental conditions,the mass ratio of catalyst and CODis fixed at 5,and the mass ratios of O₃ to CODare 0.11,0.15 and 0.26.The cadmium catalyst improves the ozone absorption rate while the chromium catalyst reduces the rate of ozone absorption.The copper catalyst increases the CODremoval rate at an O₃ to CODmass ratio of 0.15 and the leachate CODremoval rate increases by 20.2 percent over the no catalyst condition.The nickel catalyst has the fastest NH₄⁺-Nremoval rate;at an O₃ to CODmass ratio of 0.26,the NH₄⁺-Nremoval rate rises 20.7 percent.The best dosage of ozone in catalytic ozonation is an O₃ to CODmass ratio of 0.125.

• Key words：leachate  catalytic ozonation  mass ratios of O₃ and COD  mass ratios of catalyst and COD

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