Spatial distribution and health risk assessment of soil heavy metals in an abandoned sulfuric acid production site
摘要
This study in 2022 investigated the spatial distribution and sources of heavy metals in soils from abandoned sulfuric acid production sites in Henan Province, China, while also assessing associated health risks. In this area the average concentrations of arsenic (As), lead (Pb), mercury (Hg), cobalt (Co), and thallium (TI) were found to be 218.52 mg·kg−1, 105.10 mg·kg−1, 1.90 mg·kg−1, 14.77 mg·kg−1, and 0.610 mg·kg−1, respectively. These results were analyzed using Correlation Analysis (CA) and Principal Component Analysis (PCA), as well as Kriging and Inverse Distance Weighting (IDW) techniques in ArcGIS and Earth Volumetric Studio (EVS) software to identify the distribution and sources of heavy metal pollution. The results showed that the pollution of As, Pb, and Co was mainly attributed to the raw materials used in sulfuric acid production. Meanwhile, the pollution of Hg and Tl varied across different sulfuric acid production systems, possibly due to variations in raw materials. The combination of the potential ecological risk index (PERI) and the human health risk assessment concluded that arsenic and mercury are potentially risky, arsenic and cobalt are carcinogenic, and all heavy metal pollutions have non-carcinogenic risks.