Recent decrease trend of atmospheric mercury concentrations in East China: The influence of anthropogenic emissions

Abstract

Measurements of gaseous elemental mercury (GEM), other air pollutants, including SO2, NO x, O3, PM2.5, and CO, and meteorological conditions were carried out at Chongming Island in East China from 1 March 2014 to 31 December 2016. During the sampling period, GEM concentrations significantly decreased from 2.68ĝ€±ĝ€1.07ĝ€ngĝ€mĝ'3 in 2014 (March to December) to 1.60ĝ€±ĝ€0.56ĝ€ngĝ€mĝ'3 in 2016 (March to December). Monthly mean GEM concentration showed a significant decrease, at a rate of ĝ'0.60±0.08ĝ€ngĝ€mĝ'3ĝ€yrĝ'1 ( R 2 Combining double low line 0.64, p ĝ€ x, and particulate matter reductions had significant co-benefits on GEM.