State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, China.
Environ Sci Technol. 2010 Apr 1;44(7):2441-6. doi: 10.1021/es9033342.
Secondary nonferrous production is addressed as one of the potential sources of the unintentionally produced persistent organic pollutants (UP-POPs) due to the impurity of raw material. Although there are inventories of dioxin emissions from secondary nonferrous metallurgical facilities, release inventories of polychlorinated naphthalenes (PCNs) are scarce. This study selected typical secondary copper, aluminum, zinc, and lead plants to investigate the emissions of PCNs in secondary nonferrous production in China. The toxic equivalency (TEQ) emission factor for PCNs released to the environment is highest for secondary copper production, at 428.4 ng TEQ t(-1), followed by secondary aluminum, zinc, and lead production, at 142.8, 125.7, and 20.1 ng TEQ t(-1), respectively. PCNs released in secondary copper, aluminum, lead, and zinc production in China are estimated to be 0.86, 0.39, 0.009, and 0.01 g TEQ a(-1), respectively. Analysis of stack gas emission from secondary nonferrous production revealed that less-chlorinated PCNs are the dominant homologues, with mono- to tri-CNs making the most important contributions to the concentration. However, for fly ash, the more highly chlorinated PCNs such as octa-CN are the dominant homologues.
由于原料不纯，有色金属二次生产被认为是无意产生的持久性有机污染物（UP-POPs）的潜在来源之一。尽管已经有针对有色金属冶金设施中二恶英排放的清单，但多氯萘（PCN）的排放清单却很少。本研究选择了典型的有色金属二次铜、铝、锌和铅工厂，以调查中国有色金属二次生产过程中 PCN 的排放情况。PCN 向环境中释放的毒性当量（TEQ）排放因子在二次铜生产中最高，为 428.4 ng TEQ t(-1)，其次是二次铝、锌和铅生产，分别为 142.8、125.7 和 20.1 ng TEQ t(-1)。据估计，中国有色金属二次铜、铝、铅和锌生产过程中释放的 PCN 分别为 0.86、0.39、0.009 和 0.01 g TEQ a(-1)。对有色金属二次生产的烟道气排放分析表明，低氯代 PCN 是主要同系物，单氯至三氯 CN 对浓度的贡献最大。然而，对于飞灰，高氯代 PCN 如八氯代 CN 是主要同系物。
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