College of Environmental Sciences and Engineering, Peking University, Beijing, 100871, China.
College of Environmental Sciences and Engineering, Peking University, Beijing, 100871, China.
Environ Pollut. 2018 Jul;238:204-212. doi: 10.1016/j.envpol.2018.03.028. Epub 2018 Mar 20.
Although hexachlorobutadiene (HCBD) has been listed as a persistent organic pollutant (POP) under Annexes A and C of the Stockholm Convention, information about its unintentional production and emission is still very limited. We estimated the historical unintentional production and emission of HCBD during 1992-2016 in China based on aggregated activity data and emission functions. The unintentional production of HCBD increased from 60.8 (95% confidence interval, 38.2-88.5) MT/yr to 2871.5 (2234.2-3530.0) MT/yr during 1992-2016, representing an average annual growth rate of 17.4%. The main unintentional source of HCBD changed from carbon tetrachloride to trichloroethylene production during this period. We estimated that China's cumulative emissions of HCBD were 8211.3 (6131.5-10,579.5) MT during the same period. HCBD consumption and the chlorinated hydrocarbon production sector were the major contributors to total HCBD emissions. Owing to the long-range transport capability of HCBD (8784 km), such high emissions in China may cause adverse effects in other regions.
尽管六氯丁二烯（HCBD）已被列入斯德哥尔摩公约附件 A 和 C 中的持久性有机污染物（POP），但其无意生产和排放的信息仍然非常有限。我们根据汇总的活动数据和排放函数，估算了 1992-2016 年期间中国 HCBD 的历史无意生产和排放情况。1992-2016 年期间，HCBD 的无意生产从 60.8（95%置信区间：38.2-88.5）公吨/年增加到 2871.5（2234.2-3530.0）公吨/年，年均增长率为 17.4%。在此期间，HCBD 的主要无意来源从四氯化碳生产变为三氯乙烯生产。我们估计，同期中国 HCBD 的累积排放量为 8211.3（6131.5-10579.5）公吨。HCBD 消费和含氯碳氢化合物生产部门是 HCBD 总排放量的主要贡献者。由于 HCBD 的长距离传输能力（8784 公里），中国如此高的排放量可能会对其他地区造成不利影响。
