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在2021-2022年期间,中国东部的CCl₄排放,以及对潜在的新来源的探索

Bowei Li¹, Jiahuan Huang², Xiaoyi Hu¹

¹College of Environmental & Resource Sciences, Zhejiang University, 310058, Hangzhou, Zhejiang, China.

Nature communications

|February 26, 2024

概括

碳四化物 (CCl4) 排放在中国仍然存在,尽管全球逐步淘汰. 这项研究量化了2021-2022年CCl4排放量,确定了工业来源.

科学领域:

环境科学环境科学
大气化学大气化学
臭氧层保护保护臭氧层的保护

背景情况:

蒙特利尔议定书规定,到2010年,全球逐步淘汰破坏臭氧层的四化碳 (CCl4) 用于分散用途.
尽管逐步淘汰,但仍有报道未能解释的CCl4排放情况,而中国东部的近期数据很少.

研究的目的:

为量化中国东部近期的CCl4排放量.
在逐步淘汰后,确定有助于这些排放的潜在工业来源.

主要方法:

大气测量使用来自中国东部两个地点的约12,000个空气样本进行.
对2021-2022年期间的排放量进行了量化.

主要成果:

在中国东部2021-2022年的量化CCl4排放量为每年7.6±1.7千克.
这些发现证实了CCl4排放在2010年逐步淘汰分散应用后的持续情况.
确定了与制造通用机械和化学原料相关的潜在来源.

结论:

在中国东部,CCl4的排放仍在持续,这表明监管逐步淘汰与实际工业实践之间存在差距.
确定工业来源对于制定有针对性的减排战略至关重要,以进一步减少CCl4排放并保护臭氧层.

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