二氧化钛平推流光催化反应器降解染料过程中氮素的变化  

STUDY ON DEGRADATION PATTERNS OF NITROGEN IN DEGRADING DYES IN A PLUG FLOW SIMULATION REACTOR BY TiO_2

作　　者：胡志军[1] 陈建秋[2] 杨振亚[1] 何忠[1] 赵珊珊[1] 李国平[1] 王志良[1] 

机构地区：[1]江苏省环境科学研究院,南京210036 [2]中国药科大学环境科学教研室,南京210009

出　　处：《环境工程》2014年第3期65-69,共5页Environmental Engineering

基　　金：江苏省自然科学基金(BK2008500);江苏省环保科研课题经费(201110)

摘　　要：研究了在平推流光化学反应器中采用纳米TiO2光催化降解水中染料化合物。结果表明:染料化合物能被光催化有效地降解为NH+4-N、NO-3-N和其他无机离子,不同结构类型染料的降解速率不同,但均符合准一级动力学模型;通过监测降解过程中无机氮产物的含量,发现染料类化合物在光催化过程中有机氮先降解成NH+4-N,再被继续氧化成NO-3-N,由于强氧化环境的作用,NH+4-N向NO-3-N转化过程中,不经过中间价态的NO-2-N。The nanosized TiOz photocatalysis was used to degrade dyes in a plug flow simulation reactor in the paper. The results showed that the nano- TiO2 could degrade dyes compounds into non-toxic inorganies effectively such as NH4 -N, NO3- -N and so on; The degradation rate of dyes depends on their structure, and the pseudo-first order kinetics model could be used to analyze the degradation mechanism; Meanwhile, it was discovered through monitoring the content of inorganic nitrogen in the course of degradation that organic nitrogen was first decomposed into NH4 -N in the course of photoeatalysis, then was further oxidated into NO3- -N, without NO2- -N in the transformation process.

关 键 词：平推流反应器 光催化 二氧化钛 染料 降解 

分 类 号：X703[环境科学与工程—环境工程]