不同建筑材料对气态汞的吸附模拟研究
Simulation of Gaseous Mercury Adsorption of Different Building Materials
查看参考文献29篇
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文摘
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建筑材料的力学性质、相变蓄能、生态环保、再生利用等受到广泛关注,但很少有关于不同建筑材料对汞的吸附研究。通过对水泥砖、泡沫混凝土、红砖、骨料、砂石等5种建筑材料细粉和水泥混凝土立方体标准试块置于恒温室内进行气态汞吸附模拟,探索出最易受汞污染的建筑材料和水泥混凝土块的受污染深度。通过XRD和XRF对5种建筑材料分析得出其成分以SiO_2为主,其次是CaCO_3。5种建筑材料进行汞吸附实验结果表明,整体上粒径越小吸附量越大,但不同材料之间存在差异性,红砖是最容易受污染的建筑材料,其次泡沫混凝土和砂石对汞也具有较大吸附性,水泥砖和骨料对汞吸附能力较弱。水泥混凝土块吸附模拟表明污染主要存在于表层0~1.5 cm范围内,汞污染严重的工厂和车间等在拆迁、改建过程中,需要对其表层剥离,去除汞污染。 |
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其他语种文摘
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The mechanical properties, phase change energy storage, environmental protection, and recycling of building materials are extensively studied, but few studies focus on the mercury adsorption of different building materials. Five types of cement brick powder including foam concrete, red brick, aggregate and gravel as well as several standard concrete blocks were exposed to gaseous mercury in constant temperature to determine most vulnerable building material to mercury contamination and the contamination depth of concrete blocks.Results showed that small particle contributed to large mercury adsorption, however different performance was found amongvarious materials. Red brick was the likely to have strong adsorption capacity followed by foam concrete and gravel. For concrete block,the pollution mainly concentratedat the 0~1.5cm of the surface. As a result, for some seriously mercury polluted factories and workshops, mercury pollution can be removed by peeling the skin of the buildings before demolition, renovation process. |
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来源
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土木建筑与环境工程
,2014,36(6):112-118 【核心库】
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关键词
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建筑材料
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水泥混凝土块
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汞
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吸附模拟
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地址
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1.
同济大学, 污染控制与资源化研究国家重点实验室, 上海, 200092
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中国科学院水生生物研究所, 武汉, 430072
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1674-4764 |
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学科
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建筑科学 |
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基金
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国家环境保护公益性行业科研专项
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文献收藏号
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CSCD:5309252
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