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

Measurements of gaseous elemental Hg (GEM), other air pollutants including SO₂, NO_x, O₃, PM_2.5, CO, and meteorological conditions were carried out at Chongming Island in East China from March 1 in 2014 to December 31 in 2016. During the sampling period, GEM concentrations significantly decreased from 2.68&amp;thinsp;&amp;plusmn;&amp;thinsp;1.07&amp;thinsp;ng&amp;thinsp;m^&amp;minus;3 in 2014 to 1.60&amp;thinsp;&amp;plusmn;&amp;thinsp;0.56&amp;thinsp;ng&amp;thinsp;m^&amp;minus;3 in 2016. Monthly mean GEM concentrations showed a significant decrease with a rate of &amp;minus;0.60&amp;thinsp;ng&amp;thinsp;m^&amp;minus;3&amp;thinsp;yr^&amp;minus;1 (R²&amp;thinsp;=&amp;thinsp;0.6389, p&amp;thinsp;<&amp;thinsp;0.01 significance level). Combining the analysis of potential source contribution function (PSCF), principle component analysis (PCA), and emission inventory, we found that Yangtze River Delta (YRD) region was the dominant source region of atmospheric mercury in Chongming Island and the main source industries included coal-fired power plants, coal-fired industrial boilers, and cement clinker production. We further quantified the effect of emission change on the air Hg concentration variations at Chongming Island through a coupled method of trajectory clusters and air Hg concentrations. It was find that the reduction of domestic emissions was the main driver of GEM decline in Chongming Island, accounting for 66&amp;thinsp;% of the total decline. The results indicated that air pollution control policies targeting SO₂, NO_x and particulate matter reductions had significant co-benefits on atmospheric mercury.

期刊: Atmospheric Chemistry and Physics Discussions  2018
作者: Jiming Hao,Zhijian Li,Haotian Zheng,Lei Zhang,Wei Gao,Shu Li,Long Wang,Kaiyun Liu,Qingru Wu,Shuxiao Wang,Yi Tang
DOI:10.5194/acp-2017-1203

Role of inherent active constituents on mercury adsorption capacity of chars from four solid wastes

期刊: Chemical Engineering Journal  2017
作者: Boxiong Shen,Yi Tang,Qingru Wu,Fengyang Wang,Shuxiao Wang,Guoliang Li
DOI:10.1016/j.cej.2016.08.106

Mercury flows in large-scale gold production and implications for Hg pollution control

期刊: Journal of Environmental Sciences  2017
作者: Jiming Hao,Yi Tang,Guoliang Li,Haitao Su,Mei Yang,Shuxiao Wang,Qingru Wu
DOI:10.1016/j.jes.2017.03.029

The influence of flue gas components and activated carbon injection on mercury capture of municipal solid waste incineration in China

期刊: Chemical Engineering Journal  2017
作者: Fengyang Wang,Kaiyun Liu,Lei Chen,Minjiang Zhao,Yi Tang,Hongyan Liang,Zhijian Li,Shuxiao Wang,Qingru Wu,Guoliang Li
DOI:10.1016/j.cej.2017.05.099