A 10-year observation of PM(2.5)-bound nickel in Xi'an, China: Effects of source control on its trend and associated health risks.
A 10-year observation of PM(2.5)-bound nickel in Xi'an, China: Effects of source control on its trend and associated health risks.
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中国西安 PM(2.5)(-) 结合镍的 10 年观察：源头控制对其趋势和相关健康风险的影响
DOI：
10.1038/srep41132
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发表时间：
2017-01-24
影响因子：
4.6
通讯作者：
Huang R
中科院分区：
文献类型：
--
作者：
Xu H;Ho SS;Cao J;Guinot B;Kan H;Shen Z;Ho KF;Liu S;Zhao Z;Li J;Zhang N;Zhu C;Zhang Q;Huang R
本研究首次获得了中国西北城市西安市每日样本中pm2.5结合镍（Ni）浓度的长期数据集（2004-2013年，10年）。研究了该地区镍浓度变化趋势、污染来源及潜在健康风险。2004 - 2008年，由于煤炭消费减少、能源结构调整、排放法规收紧以及工业和机动车废弃物控制技术的提高，Ni浓度呈上升趋势，但随后又有所下降。通过比较工作日和非工作日期间的分布，评估了地方和区域空气污染控制政策的有效性以及假设Ni源（工业和汽车尾气）的贡献，展示了十年来对人群的健康效益。Ni的平均致癌风险高于10−6的阈值，表明致癌物Ni仍然是居民关注的问题。我们的研究结果表明，仍需要制定更严格的大气Ni策略和指导方针，以帮助平衡中国经济增长与环境保护之间的关系。
This study presents the first long term (10-year period, 2004–2013) datasets of PM2.5-bound nickel (Ni) concentration obtained from the daily sample in urban of Xi’an, Northwestern China. The Ni concentration trend, pollution sources, and the potential health risks associated to Ni were investigated. The Ni concentrations increased from 2004 to 2008, but then decreased due to coal consumption reduction, energy structure reconstruction, tighter emission rules and the improvement of the industrial and motor vehicle waste control techniques. With the comparison of distributions between workday and non-workday periods, the effectiveness of local and regional air pollution control policies and contributions of hypothetical Ni sources (industrial and automobile exhausts) were evaluated, demonstrating the health benefits to the populations during the ten years. Mean Ni cancer risk was higher than the threshold value of 10−6, suggesting that carcinogenic Ni still was a concern to the residents. Our findings conclude that there are still needs to establish more strict strategies and guidelines for atmospheric Ni in our living area, assisting to balance the relationship between economic growth and environmental conservation in China.