Concentrations and profiles of persistent organic pollutants unintentionally produced by secondary nonferrous metal smelters: Updated emission factors and diagnostic ratios for identifying sources.
Concentrations and profiles of persistent organic pollutants unintentionally produced by secondary nonferrous metal smelters: Updated emission factors and diagnostic ratios for identifying sources.
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DOI：
10.1016/j.chemosphere.2020.126958
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发表时间：
2020-05
期刊：
影响因子：
8.8
通讯作者：
Yuanping Yang;Lili Yang;Minxiang Wang;Qiuting Yang;Xiaoyun Liu;Jia Shen;Guorui Liu;M. Zheng
中科院分区：
文献类型：
--
作者：
Yuanping Yang;Lili Yang;Minxiang Wang;Qiuting Yang;Xiaoyun Liu;Jia Shen;Guorui Liu;M. Zheng
二次有色金属冶炼厂是意外产生的持久性有机污染物(UPOPs)的重要来源，包括多氯联苯(PCbs)、多氯联苯、五氯苯和六氯苯。按主要来源量化UPOP排放量是评估UPOP排放量和建立清单的重要步骤。在这项研究中，进行了现场调查，以便比较二次有色金属冶炼厂排放的UPOP排放和烟道气中的分布。从中国二次铜冶炼厂、二次锌冶炼厂和二次铅冶炼厂采集了25个烟道气样品。大多数UPOP的平均毒性当量浓度(TEQs)和质量浓度在二次锌冶炼厂烟道气中最高，在SCU烟道气中次之，在二次铅冶炼厂烟道气中最低。配备富氧熔炼炉的超临界机组烟道气中的二恶英和多氯联苯的平均∼和∼分别是转炉超临界机组烟道气的8.9%和6.6%。多氯联苯-118/多氯联苯-123和CN-10/CN-35的平均比值变化很大，可作为环境中不饱和有机污染物来源的诊断比值。推导并更新了二次有色金属冶炼厂烟道气中类二恶英、多氯联苯、五氯苯和六氯苯的排放系数。研究结果加深了我们对UPOP排放的认识，为建立二次有色金属冶炼厂UPOP排放清单提供了数据。
Secondary nonferrous metal smelters are important sources of unintentionally produced persistent organic pollutants (UPOPs) including polychlorinated biphenyls (PCBs), polychlorinated naphthalenes, pentachlorobenzene, and hexachlorobenzene. Quantifying UPOP emissions by the main sources is an important step when evaluating UPOP emissions and establishing an inventory. In this study, field investigations were performed to allow UPOP emissions and distributions in stack gases emitted by secondary nonferrous metal smelters to be compared. A total of 25 stack gas samples were collected from secondary copper smelters (SCus), secondary zinc smelters, and secondary lead smelters in China. The mean toxic equivalent concentrations (TEQs) and mass concentrations of most of the UPOPs were highest in the secondary zinc smelter stack gas samples, next highest in the SCu stack gas samples, and lowest in the secondary lead smelter stack gas samples. The mean dioxin-like PCB and polychlorinated naphthalene TEQs were ∼8.9 and ∼6.6 times higher in stack gases from a SCu equipped with an oxygen-enriched smelting furnace than in stack gases from a SCu with a converter furnace. The mean PCB-118 to PCB-123 ratios and CN-10 to CN-35 ratios varied strongly and could be used as diagnostic ratios for apportioning the sources of UPOPs in the environment. Emission factors for dioxin-like PCBs, polychlorinated naphthalenes, pentachlorobenzene, and hexachlorobenzene in stack gases from secondary nonferrous metal smelters were derived and updated. The results improve our understanding of UPOP emission and provide data for establishing UPOP emission inventories for secondary nonferrous metal smelters.