摘要
采用Fenton和Fe0-类Fenton氧化反应处理含H酸结晶废母液,基于氧化还原电位(ORP)与铁离子浓度变化规律,对两种体系最佳反应条件下的处理效能进行分析.研究表明:Fenton体系在H2O2投加量为140mmol/L,n(H2O2)∶n(Fe2+)为15∶1,初始pH值为2.0时取得最佳处理效果,此时,化学需氧量(COD)降低率可达79%,总有机碳(TOC)降低率可达50%;而Fe0-类Fenton体系则在H2O2投加量为140mmol/L,Fe0投加量为0.50g/L,溶液初始pH值为1.6时取得最佳处理效果,此时,溶液COD降低率可达73%,TOC降低率可达47%.研究结果表明,以Fe2+作为催化剂处理H酸结晶废母液要比Fe0的处理效果稍好,且氧化剂H2O2的利用效率更高.
Fenton oxidation processes and Fe^-Fenton like oxidation processes were applied to the treatment of spent liquor of H-acid crystallization. The optimal treatment efficiencies of two advanced chemical oxidation reactions were discussed based on the results of the oxidation reduction potential （OP.P） and iron ion concentration variation measurements. By Fenton oxidation, chemical oxygen demand（COD） and total organic carbon（TOC） reduced rates reached to 79% and 50% at the optimal conditions, that was, H2O2 concentration of 140 mmol/L, the molar ratio of H2O2 to Fe^2＋ of 15 ： 1 and the initial pH value of 2.0. The optimal operation conditions of Fe^-Fenton like reaction were pH value of 1.6, H2O2 concentration of 140 mmol/L and the Fe~ dosage of 0.50 g/L. The corresponding COD and TOC reduced rates were 73% and 47%, respectively. It was concluded that the catalytic performance of ferrous ions was superior to that of zero valence iron according to the treatment efficiency and H2O2 oxidant utilization efficiency for spent liquor of H-acid crystallization.
出处
《东华大学学报（自然科学版）》
CAS
CSCD
北大核心
2015年第2期247-252,共6页
Journal of Donghua University(Natural Science)
基金
国家自然科学基金资助项目(21277023)
