研究论文
高迎新,杨敏,王东升,张昱.Fenton反应中水解Fe(Ⅲ)的形态分布特征研究[J].环境科学学报,2002,22(5):551-556
Fenton反应中水解Fe(Ⅲ)的形态分布特征研究
- Speciation characteristics of hydrolyzed Fe(Ⅲ) in Fenton reaction using Ferron assay
- 基金项目：
- 作者
- 单位
- 高迎新
- 中国科学院生态环境研究中心环境水化学国家重点实验室,北京 100085
- 杨敏
- 中国科学院生态环境研究中心环境水化学国家重点实验室,北京 100085
- 王东升
- 中国科学院生态环境研究中心环境水化学国家重点实验室,北京 100085
- 张昱
- 中国科学院生态环境研究中心环境水化学国家重点实验室,北京 100085
- 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,H2O2 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H2O2 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H2O2 浓度的增大而减少.
- Abstract：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 0.2mg·L-1 and H2O2 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 H2O2 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 H2O2.
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