Nitrosyl Ferrous Chelates(Ⅲ) Kinetics of the Reaction Between Fe~Ⅱ (EDTMP) (NO) and Sodium Sulfite

邓援建; 庄亚辉

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Nitrosyl Ferrous Chelates(Ⅲ) Kinetics of the Reaction Between Fe~Ⅱ (EDTMP) (NO) and Sodium Sulfite

更新时间：2025-12-16

- Nitrosyl Ferrous Chelates(Ⅲ) Kinetics of the Reaction Between Fe~Ⅱ (EDTMP) (NO) and Sodium Sulfite
- CIESC Journal Issue 4, (1988)
- 作者机构：
  
  中国科学院生态环境研究中心,中国科学院生态环境研究中心 ,北京,北京
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Online First：25 August 1988，
  
  Published：25 August 1988
- 稿件说明：
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邓援建, 庄亚辉. Nitrosyl Ferrous Chelates(Ⅲ) Kinetics of the Reaction Between Fe~Ⅱ (EDTMP) (NO) and Sodium Sulfite[J]. CIESC Journal, 1988, (4).
DOI：

邓援建, 庄亚辉. Nitrosyl Ferrous Chelates(Ⅲ) Kinetics of the Reaction Between Fe~Ⅱ (EDTMP) (NO) and Sodium Sulfite[J]. CIESC Journal, 1988, (4). DOI：

摘要

本文用快速混合法研究了水溶液中乙二胺四甲叉膦酸根亚硝酰铁(Ⅱ)与亚硫酸钠之间的反应动力学.在pH=5.88和离子强度0.3mol/1的条件下

上述反应为二级反应.测得20

30和35℃时的反应速率常数k分别为1.95

3.03

5.48和7.05 1/mol·min

表观反应活化能为68.6kJ/mol

比FeⅡ(EDTA)(NO)体系的活化能要小.讨论了溶液酸度对k的影响.

Abstract

The rate of reaction between nitrosyl ferrous ethylenediaminetetramethy-lenephosphonate and sodium sulfite in aqueous solutions was measured spec-trophotometrically at temperatures ranging from 20 to 35℃ and over the pH range 5.57 to 7.48 with the aid of a rapid mixing device. The FeII (EDTMP) (NO) solution

prepared by introducing nitric oxide into FeII (EDTMP)solution

was mixed instantaneously with sodium sulfite solution. Then the sequential change in absorbance of the solution at 590-600 nm was scanned. The reaction was of second order at pH 5.88 and I = 0.3 mol/l.The reaction rate constant k at 20

30 and 35℃ was determined to be 1.95

3.03

5.48 and 7.05 l/(mol. min)

respectively. The apparent activation- energy for this reaction was calculated to be 68.6kJ/mol

which was smaller than that of the-FeII(EDTA)(NO)system(102.9 kJ/mol at pH 5.97). The dependence of the reaction rate on pH was discussed.

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