| 废弃聚氨酯硬泡中CFC-11的释放机理 |
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| 引用本文： | 刘景洋,段宁,杨勇,郭玉文.废弃聚氨酯硬泡中CFC-11的释放机理[J].环境科学与技术,2011,34(4):1-5. |
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| 作者姓名： | 刘景洋 段宁 杨勇 郭玉文 |
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| 作者单位： | 1. 中国环境科学研究院,北京,100012;北京师范大学水科学研究院,北京,100875
2. 中国环境科学研究院,北京,100012 |
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| 基金项目： | "十一五"国家科技支撑计划项目，环境保护部公益项 |
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| 摘 要： | 将聚氨酯硬泡在密闭室中切割破碎,破碎后的颗粒置于密闭瓶中并对其加热及常温下长期放置,用GC/MS测量切割破碎和加热时CFC-11的释放量,以及长期放置时CFC-11释放量。结果表明:破碎处理PUR泡沫时,CFC-11的释放分为瞬间释放、短期释放和长期释放三个阶段。将硬泡破碎至<8 mm、<4 mm、<1 mm和<0.5 mm时,CFC-11瞬间释放量分别占CFC-11总量的40.72%、65.24%、70.79%和75.16%;当破碎粒径<0.5 mm时,包裹于硬泡泡孔中的CFC-11全部释放;PUR泡沫破碎后,短期释放和长期释放同时发生;根据理想数学扩散模型和实验所得扩散系数估算,1~10 mm颗粒中残留的CFC-11长期释放时间为2.4~120年。
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| 关 键 词： | 废弃聚氨酯硬泡 CFC-11 瞬间释放 短期释放 长期释放 |
Mechanism of CFC-11 from Waste Polyurethane Rigid Foams |
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| LIU Jing-yang,DUAN Ning,YANG Yong,GUO Yu-wen.Mechanism of CFC-11 from Waste Polyurethane Rigid Foams[J].Environmental Science and Technology,2011,34(4):1-5. |
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| Authors: | LIU Jing-yang DUAN Ning YANG Yong GUO Yu-wen |
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| Institution: | LIU Jing-yang1,2,DUAN Ning1,YANG Yong1,GUO Yu-wen1(1.Chinese Research Academy of Environmental Sciences,Beijing100012,China,2.Research Institute of Water Science,Beijing Normal University,Beijing100875,China) |
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| Abstract: | When rigid polyurethane foam was cut and shredded in the closed room,release mass of CFC-11 was determined by using GC/MS.After putting shredded particles into the closed bottles,change of release mass of CFC-11 at room temperature was monitored during long-term placement.Results showed that CFC-11 release process from shredded foam conceptually can be divided into three segments including instantaneous release,short-time release and long-time release.For shredded foam particle size less than 8mm,4mm,1mm an... |
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| Keywords: | CFC-11 |
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