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.

ABSTRACT: This study presents the first long term (10-year period, 2004-2013) datasets of PM_2.5-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 evaluate

SUBMITTER: Xu H 

PROVIDER: S-EPMC5259713 | biostudies-literature | 2017 Jan

REPOSITORIES: biostudies-literature