Estimation and Congener-Specific Characterization of Polychlorinated Naphthalene Emissions from Secondary Nonferrous Metallurgical Facilities in China
Estimation and Congener-Specific Characterization of Polychlorinated Naphthalene Emissions from Secondary Nonferrous Metallurgical Facilities in China
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DOI：
10.1021/es9033342
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发表时间：
2010-04-01
影响因子：
11.4
通讯作者：
Xiao, Ke
中科院分区：
文献类型：
--
作者：
Ba, Te;Zheng, Minghui;Xiao, Ke
二次有色金属生产是由于原料不纯而产生的持久性有机污染物（up - pop）的潜在来源之一。虽然有二级有色冶金设施二恶英排放的清单，但多氯萘（PCNs）的释放清单很少。本研究选取了中国典型的二次铜、铝、锌和铅厂，调查了中国二次有色金属生产中PCNs的排放情况。二次铜生产释放到环境中的PCNs的毒性当量（TEQ）排放因子最高，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）。中国次级铜、铝、铅和锌生产中释放的PCNs估计分别为0.86、0.39、0.009和0.01 g TEQ a（-1）。对二次有色金属生产烟囱气体排放的分析表明，氯化程度较低的PCNs是主要的同系物，单至三cns对浓度的贡献最大。然而，对于粉煤灰来说，氯化程度较高的PCNs如八羧基氰化钠是主要的同源物。
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 TEO 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.