Heavy metal vaporization and abatement during thermal treatment of modified wastes.
Heavy metal vaporization and abatement during thermal treatment of modified wastes.
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DOI：
10.1016/j.jhazmat.2007.03.009
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发表时间：
2007-09
影响因子：
13.6
通讯作者：
Sébastien Rio;C. Verwilghen;Jocelyn Ramaroson;A. Nzihou;P. Sharrock
中科院分区：
文献类型：
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作者：
Sébastien Rio;C. Verwilghen;Jocelyn Ramaroson;A. Nzihou;P. Sharrock
本研究考察了添加 PVC、重金属或磷酸盐的废物热处理过程中重金属 Cd、Pb 和 Zn 的蒸发百分比和分配，以及吸附剂去除工业固体废物焚烧炉烟气中这些金属化合物的效率。首先，进行汽化实验以确定重金属在各种条件下（废物类型、温度、氯化物或磷酸盐的存在……）下燃烧过程中的行为。实验结果表明，飞灰和石灰石基质中金属化合物的蒸发百分比相对较高，而经磷酸处理的沉积物中的重金属挥发性较低。金属的蒸发随着温度的升高和氯化物的添加而增加。所选重金属的热行为及其吸附剂（碳酸氢钠、活性炭）的去除也在工业固体废物焚烧炉中进行了研究。这些中试规模实验证实，重金属集中在飞灰和旋风分离器残留物中，从而有效控制了它们向大气的释放。
This study examines the vaporization percentage and partitioning of heavy metals Cd, Pb and Zn during thermal treatment of wastes with added PVC, heavy metals or phosphate, and the efficiency of sorbents for removal of these metallic compounds in flue gas of an industrial solid waste incinerator. Firstly, vaporization experiments were carried out to determine the behavior of heavy metals during combustion under various conditions (type of waste, temperature, presence of chloride or phosphate …). The experimental results show relatively high vaporization percentage of metallic compounds within fly ash and limestone matrix while heavy metals within sediments treated with phosphoric acid are less volatile. Vaporization of metals increases with increasing temperature and with chloride addition. The thermal behavior of the selected heavy metals and their removal by sorbents (sodium bicarbonate, activated carbon) was also studied in an industrial solid waste incinerator. These pilot scale experiments confirm that heavy metals are concentrated in fly ashes and cyclone residues, thus effectively controlling their release to the atmosphere.