摘要
以空气氧化法和双氧水氧化法分别处理了低浓度和高浓度的亚硝酸盐废水,考察了亚硝酸盐氧化反应特性。结果表明,空气氧化低浓度的亚硝酸盐时,所发生的化学反应是一个极为缓慢的过程,亚硝酸根浓度级数近似为0,pH低时较为有利;双氧水氧化法能在温和的条件下高效地处理高浓度亚硝酸盐废水,在温度为40℃、双氧水用量为理论需用量、维持pH=5的条件下,反应30min后,处理含300 mmol/L亚硝酸盐废水,亚硝酸盐可100%的氧化为硝酸盐,实现了硝酸盐资源化回收利用。
Low and high concentration nitrite wastewater treatment by using air and hydrogen peroxide oxidation method respectively,and nitrite oxidation characters had been investigated.The results indicated that low concentration nitrite by air oxidation was an extremely slow reaction progress,the reaction order was pseudo-zero,and the lower pH value,the better reaction.High concentration nitrite wastewater was high efficient treated by hydrogen peroxide oxidation under wild conditions.Nitrite was transformed into nitrate with 100%oxidation efficiency,and resource utilization of nitrate was attained at the conditions of temperature 40℃, theoretical dosage of peroxide when the initial concentration of nitrite in wastewater was 300 mmol/L,reaction time was 30 min.
出处
《广东化工》
CAS
2010年第6期177-178,180,共3页
Guangdong Chemical Industry
基金
国家高技术研究发展计划(863计划)(2007AA061701)
