| 冰晶中双氧水的UV光解 |
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| 引用本文： | 叶招莲,李萍,曹长青,侯惠奇,张仁熙.冰晶中双氧水的UV光解[J].环境化学,2009,28(1). |
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| 作者姓名： | 叶招莲 李萍 曹长青 侯惠奇 张仁熙 |
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| 作者单位： | 1. 复旦大学环境科学研究所,上海,200433;江苏技术师范学院,常州,213001
2. 复旦大学环境科学研究所,上海,200433 |
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| 摘 要： | 本文采用253.7 nm的紫外灯光解冰晶中的双氧水,研究其光解率随光照时间和温度的变化.以及Cl~-,SO_4~(2-)和CO_3~(2-)对其降解的影响,结果表明,相同条件下三种离子对其影响大小依次为:Cl~->SO_4~(2-)>CO_3~(2-).对比冰晶和水溶液中双氧水的光解,冰晶中双氧水的光解速率低于水溶液中双氧水的光解速率.紫外-可见光谱(UV-vis)分析其光解产物,没有发现新的物质生成.由此可以认为,冰晶中双氧水主要在冰晶笼子中进行反应,少部分在类似液体层(QLL)中降解.
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| 关 键 词： | 冰晶 过氧化氯 光解 |
PHOTOLYSIS OF HYDROGEN PEROXIDE IN ICE |
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| YE Zhao-lian,LI Ping,CAO Chang-qing,HOU Hui-qi,ZHANG Ren-xi.PHOTOLYSIS OF HYDROGEN PEROXIDE IN ICE[J].Environmental Chemistry,2009,28(1). |
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| Authors: | YE Zhao-lian LI Ping CAO Chang-qing HOU Hui-qi ZHANG Ren-xi |
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| Abstract: | The photolysis of hydrogen peroxide(H_2O_2)in ice was investigated with 253.7 nm UV light.We have studied the relationship between photolysis efficiency of H_2O_2 with irradiation time as well as temperature.The effect of three types of inorganic ions(Cl~-,SO_4~(2-)and CO_3~(2-))on H_2O_2 photolysis rate in ice has also been re- ported,which followed the order: Cl~->SO_4~(2-)>CO_3~(2-).H_2O_2 photolysis in ice appeared to be slower than that in aqueous solution at the same condition.No new photolysis products were observed using UV-Vis spectra a- nalysis.On the basis of our experiment,we inferred that most of H_2O_2 photolysis took place in ice cage,while only small parts occurred in quasi-liquid layer(QLL). |
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| Keywords: | ice inorganic ion photolysis |
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