中国多甲的意外排放:来源,成分和历史趋势
Ye Huang1, Lin Huang1, Ying Li1
1Key Laboratory of Geographic Information Science of the Ministry of Education, School of Geographic Sciences, East China Normal University, Shanghai 200241, China.
Journal of environmental sciences (China)
|August 2, 2024
概括
无意释放的多甲 (PCN) 在中国越来越令人担忧. 从1960年到2019年,排放量增加,主要来源是钢铁行业.
科学领域:
- 环境化学环境化学
- 污染控制 污染控制
- 毒理学 毒理学 毒理学
背景情况:
- 多甲 (PCN) 对人类健康和生态系统构成重大风险.
- 商业PCN生产被禁止,但无意释放仍然存在,成为主要的环境来源.
- 关于PCN排放的数据,特别是来自中国的非故意来源的数据,仍然有限.
研究的目的:
- 从1960年到2019年,估计中国大陆八种PCN原原体的省级排放量.
- 确定主要的排放来源和地理热点.
- 分析排放趋势及其与社会经济因素的关系.
主要方法:
- 开发了37个来源的源特定和时间变化的排放因子数据库.
- 从1960年到2019年,中国各省八种PCN同源的估计年排放量.
- 分析了排放趋势,来源贡献,以及与人均GDP的相关性.
主要成果:
- 2019年,PCN总排放量达到757.0公斤,其中河北省和钢铁行业是主要贡献者.
- 低含量的PCN以质量 (90%) 主导排放,而高含量的PCN则引起了更大的毒理问题.
- 从1960年到2019年,排放总体上呈上升趋势,受到钢铁行业和中国东北地区的推动.
- 人均排放遵循一个反转的U形曲线,而排放强度随着人均GDP的上升而下降.
结论:
- 不故意的PCN排放,特别是来自钢铁行业的PCN排放,是中国的关键环境问题.
- 需要不同的战略来解决低PCN的大规模排放和高PCN的毒性驱动的担忧.
- 了解PCN排放的社会经济驱动因素对于有效的污染控制和环境保护政策至关重要.
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