摘要
采用燃料灰吸附和Fenton氧化再生处理组合工艺对典型氮杂环化合物(吲哚、吡啶和喹啉)废水的处理性能进行了研究。从其吸附动力学及热力学等指标对两种燃料灰的处理效果进行了比较。其中,粉煤灰(FYA)和燃油灰(FLA)对3种化合物的吸附均可较好地拟合于一级动力学模型和Freundlich模型,其线性相关度均在0.99以上。FLA吸附速率优于FYA,吸附效果也优于FLA。以燃料灰吸附吲哚废水为例,在5 min时,FYA和FLA的吸附量已经分别达到0.3869,1.12325 mg/g。在最优再生条件下进行连续循环吸附-再生过程,从整体上看,再生率随再生次数增加而下降。
A combined process with fuel ashes adsorption-Fenton-drive oxidation regeneration was used to deal with three typical N-heterocyclic compounds （indole, pyridine and quinoline） wastewater. The adsorption kinetics, adsorption isotherms, and regeneration factors were studied. The results showed that the adsorption rate of three compounds onto FYA and FLA was high, and the adsorption followed the first-order kinetic model and Freundlich isotherms, and their linear correlations were all above 0.99. The rate of FLA ＇ s adsorption was superior to that of the FYA＇ s, and the adsorption effect was also better. Taking indole＇ s adsorption onto the fuel ash for example, the FYA and FLA＇ s adsorption capacity reached 0. 3869 mg/g and 1. 12325 mg/g respectively in 5 min. Negative correlation could be found between the fuel ashes＇ regeneration rate and regeneration times as a whole.
出处
《环境工程》
CAS
CSCD
北大核心
2014年第2期41-44,50,共5页
Environmental Engineering
基金
国家科技重大专项(2012ZX07202-002-02)
