载锰氧化物沸石对甲醛废水处理研究

Treatment of formaldehyde wastewater using manganese oxide supported by zeolite

利用水热法制备载锰氧化物沸石,应用其对高浓度甲醛废水进行处理。研究了载锰氧化物沸石去除甲醛的循环使用性能,并对甲醛去除机理进行了初步探讨。结果表明,载锰沸石对浓度为1%的甲醛的去除容量达4 133 mg/g,且循环利用3次,去除容量仍达3 500 mg/g,通过吸附-催化氧化的协同作用,将甲醛最终转变为H2O和CO2,实现了室温下甲醛的矿化。

Manganese oxide supported by zeolite has been successfully fabricated using a hydrothermal treatment to remove high concentration formaldehyde waste. The recycle performance of the new material has been investigated. The mechanism of formaldehyde removal has been also discussed. The results indicate that the removal capacity of 1% formaldehyde by modified zeolite was up to 4 133 mg/g,and the removal capacity is still up to 3 500 mg/g after reused three times. Formaldehyde is eventually turned in- to H20 and CO2 by exploiting synergy between adsorption and catalytic oxidation of manganese oxide sup- ported by zeolite, and it realizes formaldehyde mineralization at room temperature.