Rio S, Verwilghen C, Ramaroson J, Nzihou A, Sharrock P
Centre RAPSODEE, UMR CNRS 2392, Ecole des Mines d'Albi, Campus Jarlard, 81000 Albi, France.
J Hazard Mater. 2007 Sep 30;148(3):521-8. doi: 10.1016/j.jhazmat.2007.03.009. Epub 2007 Mar 12.
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.
本研究考察了添加聚氯乙烯、重金属或磷酸盐的废物热处理过程中重金属镉、铅和锌的挥发率及分配情况，以及工业固体废物焚烧炉烟气中吸附剂去除这些金属化合物的效率。首先，进行了挥发实验以确定各种条件（废物类型、温度、氯化物或磷酸盐的存在……）下燃烧过程中重金属的行为。实验结果表明，飞灰和石灰石基质中的金属化合物挥发率相对较高，而用磷酸处理的沉积物中的重金属挥发性较小。金属的挥发随着温度的升高和氯化物的添加而增加。还在工业固体废物焚烧炉中研究了所选重金属的热行为及其通过吸附剂（碳酸氢钠、活性炭）的去除情况。这些中试规模实验证实，重金属集中在飞灰和旋风除尘器残渣中，从而有效控制了它们向大气中的释放。
