Figure 2

Spatial distribution of non-carcinogenic risk for each specific heavy metal before remediation: (a) Cd; (b) As; (c) Cu; (d) Hg; (e) Zn (Note: non-carcinogenic diseases might be caused by heavy metal exposure if HI > 1; ArcGIS 10.1 was used to create the map in this figure, http://www.esrichina.com.cn/2015/0107/2830.html).