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Citation: CAI Tao, ZHANG Luji, HU Liujiang, DONG Huaping, LI Yimin. Degradation of Atrazine by Peroxydisulfate Activated with Zero-valent Iron[J]. Chinese Journal of Applied Chemistry, ;2013, 30(1): 114-119. doi: DOI:10.3724/SP.J.1095.2013.20026 shu

Degradation of Atrazine by Peroxydisulfate Activated with Zero-valent Iron

1.
Department of Chemistry, Shaoxing College of Arts and Sciences, Shaoxing 312000, China

Corresponding author: DONG Huaping,
Received Date: 16 January 2012
Available Online: 31 March 2012
Fund Project: 浙江省科技厅科技计划分析测试基金(2011C37012) (2011C37012)浙江省大学生科技创新(2010R426026)资助项目 (2010R426026)

In this paper,SO₄^-· was activated by peroxydisulfate(PDS) with zero-valent iron(Fe⁰) in aqueous,and its activity was tested by removing atrazine.Influencing factors including the initial pH,initial concentration of PDS and dosage of Fe⁰ were tested.The results indicated that removal efficiencies of atrazine(100 mL 0.10 mmol/L) by Fe⁰/PDS reached 99.0% within 60 min at pH=6.5,1 mL PDS initial concertration 2.0 mmol/L,28 mg Fe⁰,which was much higher than that when Fe⁰ or PDS was used alone,and superior to the Fe²⁺/PDS or Fe³⁺/PDS with the same amount of iron.Results also showed that the oxidation process of atrazine by SO₄^-· was facilitated by lowering pH,and the removal efficiency increased with raising the initial concentration of PDS or iron dosage.In addition,the reactive intermediates were identified as SO₄^-· and hydroxyl radicals(·OH) by employing methanol(MeOH) and tert-butyl alcohol(TBA) as the radical quenching agents.
- zero-valent iron,
- peroxydisulfate,
- sulfate radicals,
- atrazine
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