Cu/TiO_2催化湿式氧化甲醛废水

CATALYTIC WET AIR OXIDATION OF FORMALDEHYDE BY Cu/TiO_2

甲醛废水排放入水体后,破坏生态系统,影响人们的身体健康。考察了以自制的Cu/TiO2为催化剂,用催化湿式氧化的方法降解甲醛废水的情况。通过优化反应条件,在180℃、pH=5、0.5 MPa、催化剂量为6 g/L时反应2 h,TOC的去除率高达85%,且Cu2+和Ti4+基本没有流失。此外还检测了甲醛溶液中甲醇变化情况和经处理后甲醛废水的降解产物甲酸。结果表明,以Cu/TiO2为催化剂的催化湿式氧化能有效地降解甲醛废水。

Formaldehyde wastewater would destroy ecological system and influence human health when discharging the wastewater into the water body.This study mainly focused on the degradation of formaldehyde wastewater by catalytic wet air oxidation（CWAO） with the self-prepared Cu/TiO2 as catalyst.After optimizing the reaction conditions,Total Organic Carbon（TOC） removal reached 85% and the loss of Cu^2＋ and Ti^4＋ was very low under 180℃,pH=5,0.5MPa with 6 g/L catalyst after 2 h reaction.Finally,methanol in formaldehyde solution and the degradation products formic acid were detected.Results demonstrated that CWAO with Cu/TiO2 as catalyst could remove formaldehyde in wastewater efficiently.