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首页> 外文期刊>Environmental Science & Technology >Characterization and Inventory of PCDD/F Emissions from the Ceramic Industry in China
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Characterization and Inventory of PCDD/F Emissions from the Ceramic Industry in China

机译：中国陶瓷行业PCDD / F排放的特征和清单

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摘要

The ceramic industry is considered to be a potential source of dioxins (polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs), considering the widespread distribution of dioxins in kaolinitic clays. Nevertheless, studies on the emission of dioxins from the ceramic industry are still very scarce. In this study, raw clays and stack gases from six typical ceramic plants in China were collected and analyzed to estimate the emission of dioxins from the ceramic industry. Dioxin profiles in raw clays were characterized by the domination of the congener octachlorodibenzo-p-dioxin (OCDD), and the contents of other congeners declined with the decreasing degree of chlorination. During the ceramic firing process, a considerable amount (16.5-25-1 wt % of the initial quantity in raw clays) of the dioxins was not destroyed and was released to the atmosphere. Dechlorination of OCDD generated a broad distribution within the PCDD congeners including a variety of non-2,3,7,8-substituted ones with the mass abundance of 0.4-3.6%. Based on the mean concentrations measured in this study, the inventory of PCDD/Fs from the manufacturing of ceramics on the Chinese scale was estimated to be 7.94 kg/year; the corresponding value on the I-TEQ basis is 133.6 g I-TEQ/year. This accounts for about 1.34% (I-TEQ basis) of the total emission of dioxins to the environment in China. The results suggest that the ceramic industry is a significant source of dioxins in the environment.
机译：考虑到二恶英在高岭土中的广泛分布，陶瓷工业被认为是二恶英的潜在来源（多氯二苯并对二恶英和二苯并呋喃（PCDD / Fs））。在这项研究中，我们收集并分析了中国六家典型陶瓷厂的原土和烟道气，并估算了陶瓷行业中二恶英的排放量。对二恶英（OCDD），其他同类物的含量随着氯化度的降低而降低，在陶瓷烧成过程中，相当数量的二恶英（占生黏土初始量的16.5-25-1 wt％）是OCDD的脱氯作用在PCDD同源物内产生了广泛的分布，包括各种未被2,3,7,8取代的质量丰度为0.4-3.6％。根据这项研究中测得的平均浓度，中国规模的陶瓷生产中的PCDD / Fs库存估计为7.94千克/年。以I-TEQ为基础的相应值是133.6 g I-TEQ /年。这约占中国环境中二恶英排放总量的1.34％（以I-TEQ为基础）。结果表明，陶瓷工业是环境中二恶英的重要来源。

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  • 来源
    《Environmental Science & Technology》 |2012年第7期|p.4159-4165|共7页
  • 作者

    Mang Lu; Guoxiang Wang; Zhongzhi Zhang; Youming Su;

  • 作者单位

    School of Materials Science and Engineering, Jingdezhen Ceramic Institute, Jingdezhen 333403, Jiangxi Province, China;

    College of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang 414006,Hunan Province, China;

    State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China;

    Offshore Oil Engineering Co., Ltd., Engineering Company, Tianjin 300451, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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  • 正文语种 eng
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