Removal of PCBs and HCB from contaminated solids using a novel successive self-propagated sintering process
Removal of PCBs and HCB from contaminated solids using a novel successive self-propagated sintering process
复制标题
使用新型连续自蔓延烧结工艺去除受污染固体中的 PCB 和 HCB
DOI：
10.1007/s11356-015-4939-z
复制
发表时间：
2015
期刊：
影响因子：
--
通讯作者：
M. Hosomi
中科院分区：
文献类型：
--
作者：
Long Zhao;T. Zhu;H. Hou;X. Qin;Fasheng Li;A. Terada;M. Hosomi
热处理是从受污染的固体中去除持久性有机污染物的主要技术。连续加热过程中的高能耗、废气处理所需的成本以及燃烧过程中可能形成的二次污染物阻碍了它们的实施。提出了一种新的连续自蔓延烧结法，以低成本、环保的方式去除污染固体中的多氯联苯(PCBS)和六氯苯(HCB)。进行了九个实验室规模的实验，涉及不同的污染物初始浓度和固体成分。在恒定的实验条件下，几乎所有的多氯联苯(>；99%)和六氯苯(>；97%)都被从固体中去除。污染固体中不同初始浓度的多氯联苯和六氯苯不影响污染物的去除效率，但污染物的降解效率随着初始浓度的增加而增加。虽然在废气中检测到不同水平的二恶英和二恶英，但它们都在排放标准限值之内。
Thermal treatments are the primary technologies used to remove persistent organic pollutants from contaminated solids. The high energy consumption during continuous heating, required cost for treating the exhaust gas, and potential formation of secondary pollutants during combustion have prevented their implementation. A novel successive self-propagated sintering process was proposed for removing polychlorinated biphenyls (PCBs) and hexachlorobenzene (HCB) from contaminated solids in a low-cost and environmentally friendly way. Nine laboratory-scale experiments involving different initial concentrations of pollutants and solid compositions were performed. Almost all PCBs (>99 %) and HCB (>97 %) were removed from solids under constant experimental conditions. Varying initial concentrations of PCBs and HCB in the contaminated solids did not influence the removal efficiency of the pollutants; however, the degradation efficiency of pollutants increased as their initial concentrations increased. Although varying levels of PCDD/Fs were detected in the effluent gas, they were all within the emission standard limit.