活性炭催化臭氧氧化处理低浓度氨氮废水  

Treatment of Low-concentration Ammonia Nitrogen Wastewater by Catalytic Ozonation Process with Activated Carbon

作　　者：尚会建[1,2] 周艳丽[2] 赵彦[2] 张高[2] 郑学明[2] 

机构地区：[1]天津大学化工学院,天津300192 [2]河北科技大学化学与制药工程学院,河北石家庄050018

出　　处：《化工环保》2012年第5期405-408,共4页Environmental Protection of Chemical Industry

摘　　要：采用活性炭催化臭氧氧化法处理低浓度氨氮废水,考察了模拟废水pH、活性炭加入量、臭氧流量等因素对处理效果的影响。实验结果表明:活性炭对臭氧有明显的催化作用,并可提高臭氧的利用率;在高pH条件下,OH^-能促进臭氧分解生成·OH,·OH氧化性强且反应速率快,有利于氨氮的去除;增大臭氧流量可减小气液传质过程中的阻力,使氨氮去除率增加;在初始氨氮质量浓度为35mg/L、活性炭加入量为10.0 g/L、臭氧流量为30 mg/min、模拟废水pH为11.0的条件下,反应90 min后,氨氮去除率可达97.6%,相对于单独活性炭吸附和臭氧氧化过程,氨氮去除率有了显著提高。Low-concentration ammonia nitrogen wastewater was treated by catalytic ozonation process with activated carbon. The factors affecting the treatment effect were studied. The experimental results show that： Activated carbon has a significant catalytic effect on ozonation and can improve the utilization of ozone; Under the condition of high pH, OH- can improve the decomposition of ozone and the generation of ~ OH, which is in favor of ammonia nitrogen removal with strong oxidation property and fast reaction rate; The increasing of ozone flow can weaken the resistance in the gas-liquid mass-transfer process and increase the removal rate of ammonia nitrogen; Under the conditions of initial ammonia nitrogen mass concentration 35 mg/L, activated carbon dosage 10.0 g/L, ozone flow 30 mg/min, simulated wastewater pH 11.0 and reaction time 90 min, the removal rate of ammonia nitrogen can reach 97.6%, which is much higher than those by activated carbon adsorption or ozonation.

关 键 词：催化 氧化 氨氮 活性炭 自由基 臭氧 废水处理 

分 类 号：X701[环境科学与工程—环境工程]