摘要
以Fe( )为催化剂的催化臭氧氧化降解草酸结果表明:与单独臭氧氧化相比,氧化速度提高2个数量级,反应速度常数为2.64M-1·s-1;反应pH值对降解效果有决定性的影响,当pH=3.0,反应30min,草酸的去除率超过50%,而当pH=5.5时,草酸的降解效果比较差;催化剂Fe( )的投加量对草酸的去除效果亦有很大影响,太高或太低都不利于草酸的降解;草酸的Fe( )催化臭氧反应遵循拟一级反应.
Oxalic acid was treated by Fe(Ⅲ)/O_3 system. Experimental results showed that: Removal efficiency of oxalic acid during the ozonization by Fe(Ⅲ)/O_3 system are more rapid than that obtained with ozone alone, catalytic oxidation rate of oxalic acid is taken as first-order with respect to ozone and oxalic acid concentration and the overall reaction rate constant is 2.64 M^(-1).s^(-1) which is fast more over 65 times than that of oxidation by ozone alone; some experimental parameters effect strongly on the efficiency of conversion of oxalic acid, especially such as pH value and concentration of Fe(Ⅲ). When pH=3, the degradation of oxalic acid is over 50 within 30 min. However, when pH=5, the reaction is almost restrained. The best efficiency obtained is at moderate concentration of catalyst.
出处
《浙江大学学报（理学版）》
CAS
CSCD
2004年第3期322-325,共4页
Journal of Zhejiang University（Science Edition）
