Abstract Growing public awareness of the environmental impact of coal combustion has raised serious concerns about the various hazardous trace elements produced by coal firing. Arsenic deserves special attention due to its toxicity, volatility, bioaccumulation in the environment, and potential carcinogenic properties. As the main anthropogenic source of arsenic is coal combustion, its behavior in power plants is of concern. Unlike mercury, arsenic behavior in coal combustion has not been subjected to systematic, in-depth research. Different researchers have reached opposing conclusions about the behavior of arsenic in combustion systems and, as yet, there is relatively little research on arsenic removal technologies. In this paper, the volatilization, transformation, and emission behavior of arsenic and its removal technologies are discussed in depth. Factors affecting the volatilization characteristics of arsenic are summarized, including temperature, pressure, mode of occurrence of arsenic, coal rank, mineral matter, and the sulfur and chlorine content of the fuel. The behavior of arsenic during oxy-fuel combustion and the effect of combustion atmosphere (O 2 , CO 2 , SO 2 and H 2 O(g)) are also reviewed in detail. In order to better understand the pathways of arsenic in a power plant environment, a particular focus in this work is the transformation mechanism of ultra-fine ash particles and the partitioning behavior of arsenic. Finally, the effects of air pollution control devices (APCDs) on arsenic emissions are examined, along with the effectiveness of flue gas arsenic removal technologies with different kinds of adsorbents, including calcium-based adsorbents, metal oxides, activated carbon, and fly ash.

中文翻译：

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煤炭燃烧过程中砷的行为回顾：挥发、转化、排放和去除技术

摘要 随着公众对燃煤对环境影响的意识日益增强，燃煤产生的各种有害微量元素引起了人们的严重关注。砷因其毒性、挥发性、在环境中的生物累积性和潜在的致癌特性而值得特别关注。由于砷的主要人为来源是燃煤，因此其在发电厂中的行为值得关注。与汞不同，煤炭燃烧中的砷行为尚未经过系统、深入的研究。关于砷在燃烧系统中的行为，不同的研究人员得出了相反的结论，迄今为止，对砷去除技术的研究相对较少。在本文中，挥发、转化、深入讨论了砷的排放行为及其去除技术。总结了影响砷挥发特性的因素，包括温度、压力、砷的产生方式、煤阶、矿物质、燃料的硫、氯含量等。砷在氧-燃料燃烧过程中的行为和燃烧气氛（O 2 、CO 2 、SO 2 和H 2 O(g)）的影响也进行了详细审查。为了更好地理解砷在电厂环境中的途径，本工作特别关注超细灰颗粒的转化机制和砷的分配行为。最后，研究了空气污染控制装置 (APCD) 对砷排放的影响，