首页|铜富集菖蒲生物炭对烟气汞去除性能及机制

铜富集菖蒲生物炭对烟气汞去除性能及机制

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以铜(Cu)污染修复植物石菖蒲生物质为原料，采用一步热解法制备了含铜位点的石菖蒲衍生生物碳(Cu-BC)，用于去除烟气中的元素汞(Hg0)。结果表明，500℃下热解的Cu-BC(Cu-BC500)在100℃反应温度下表现出良好的Hg0去除性能(约99%)。通过比表面积测试法(BET)、X射线衍射(XRD)、扫描电镜(SEM)、X 射线光谱(XPS)和傅里叶变换红外光谱(FT-IR)等表征分析表明，Cu-BC500 具有相对较高的比表面积，丰富的含氧官能团和高度分散的Cu物种。XPS和汞程序升温脱附(Hg-TPD)分析表明，Cu-BC500 所吸附的汞在生物炭样品的表面活性位点形成弱结合态汞Cu-O-Hg或铜汞合金。最后通过生命周期成本分析推算Cu-BC500 的成本为 3。50 元/kg。与其他材料相比，Cu-BC500 制备简单、成本较低，研究结果将为促进水体修复植物的资源化再利用以及燃煤电厂的汞减排提供新思路。
Performance and mechanism of mercury removal from flue gas by copper-enriched Acorus calamus biochar
The biochar containing copper sites(Cu-BC)was prepared by one-step pyrolysis of Cu-enriched Acorus calamus biomass and then utilized for elemental mercury(Hg0)removal from the flue gas.The results showed that Cu-BC(Cu-BC500)pyrolyzed at 500℃exhibited excellent Hg0 removal performance(about 99%)at reaction temperature of 100℃.The characterization results including specific surface area analysis(BET),X-ray diffraction(XRD),scanning electron microscope(SEM),X-ray photoelectron spectroscopy(XPS)and Fourier transform infrared spectrum(FT-IR)indicated that Cu-BC500 had a relatively high specific surface area,abundant oxygen-containing functional groups and highly dispersed Cu species.XPS and Hg-TPD analyses showed that the mercury adsorbed by Cu-BC500 existed in the forms of weakly bound mercury Cu-O-Hg or copper amalgam at the surface active sites of the biochar samples.Finally,through the life-cycle cost analysis,the cost of Cu-BC500is calculated to be 3.50yuan/kg.Compared with other materials,the preparation of Cu-BC500 is simple and low-costing.The results will provide new ideas for promoting the resource reuse of water restoration plants and mercury emission reduction in coal-fired power plants.

copper enriched acorus calamuswaste utilizationbiocharflue gaselemental mercury(Hg0)

李鸿鹄、安淼、彭喜燕、张敬东、孙洋、宋永伟

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中南财经政法大学,信息工程学院环境与健康研究中心,湖北 武汉 430073

铜富集菖蒲 废物利用 生物炭 烟气 元素汞(Hg0)

国家自然科学基金资助项目中南财经政法大学中央高校基本科研业务费专项资金资助项目中南财经政法大学中央高校基本科研业务费专项资金资助项目中南财经政法大学中央高校基本科研业务费专项资金资助项目中国博士后科学基金资助面上项目

521001342722023EZ0092722023BY0202023514172022M721284

2024

中国环境科学
中国环境科学学会

中国环境科学

CSTPCDCHSSCD北大核心
影响因子：2.174
ISSN：1000-6923
年,卷(期)：2024.44(7)
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