催化湿式氧化吡虫啉农药废水的研究

采用湿式氧化法在2 L反应釜中处理吡虫啉农药废水，研究温度、硝酸盐和Cu/Ce复合金属氧化物作催化剂对废水氧化程度的影响。结果表明，采用湿式氧化技术处理吡虫啉农药废水的适宜操作温度为190 ℃，硝酸铜对吡虫啉农药废水虽有较高的催化活性，但存在Cu²⁺ 和Ce⁴⁺的溶出；通过共沉淀法制备了一系列Cu/Ce催化剂,用于催化湿式氧化吡虫啉农药废水。Cu/Ce催化剂对吡虫啉农药废水具有较好的催化活性；优化催化剂的设计和制备方法，不但可以提高COD的去除率，而且可有效降低Cu²⁺和Ce⁴⁺的溶出量，使该类催化剂具有广阔的使用前景。

Catalytic wet oxidation of imidacloprid pesticide wastewater

Catalytic wet oxidation of imidacloprid pesticide wastewater were studied on a 2 L autoclave. Influences of temperature，nitrate and copper cerium oxides catalysts were investigated. The results showed that the appropriate temperature was 190 ℃. Copper nitrate exhibited higher COD removal efficiency for imidacloprid pesticide wastewater, while existing the problem of leaching of Cu²⁺ or Ce⁴⁺Cu/Ce catalysts prepared by co precipitation exhibited better activity than that of copper nitrate or cerium nitrate．Some measures for controlling leaching of Cu²⁺and Ce⁴⁺ and optimizing reaction conditions and design and preparation of the catalysts were discussed．