摘要
利用Fe Ferron逐时络合比色法 ,研究了不同条件下Fenton反应中Fe(Ⅲ )的水解形态分布与转化规律 .结果表明 ,H2 O2和小于 0 2mg L的Fe2 + 的存在对Ferron试剂及后续的络合反应没有影响 .当水解度相同时 ,Fenton反应生成的Fe(Ⅲ )比一般铁盐具有更强的水解趋势 .Fenton反应生成的Fe(Ⅲ )的水解形态受到H2 O2 浓度和水解度的影响较大 .水解速率随水解度的增大而增大 ,而高聚合态所占的比例却随H2 O2
The characteristics of Fe(Ⅲ) speciation in Fenton reaction were investigated by using Ferron assay. The results demonstrated that \{Fe(Ⅱ)\} with a concentration of less than 0\^2?mg·L -1 and H 2O 2 had no distinct effect on the absorbance of Ferron reagent. Fe(Ⅲ) generated from Fenton reaction had a stronger hydrolysis tendency and hydrolyzed more rapidly than that of ferric sulfate. The basicity and H 2O 2 concentration exhibited marked effects on the speciation distribution. The hydrolysis of Fe(Ⅲ) markedly increased with the increase of basicity. However, the ratio of highly polymerized species decreased significantly with the increase of concentration of H 2O 2.
出处
《环境科学学报》
CAS
CSCD
北大核心
2002年第5期551-556,共6页
Acta Scientiae Circumstantiae
