Potentially toxic elements (PTEs) pollution in surface soils in a typical urban region of south India: An application of health risk assessment and distribution pattern

Using an integrating geostatistical method in the western part of Sangareddy city, various indices such as an index of geo-accumulation (Igeo), contamination factor (CF), degree of contamination (DC), and principal component analysis (PCA) were estimated to identify and evaluate the soil potentially toxic elements (PTEs) pollution. Human exposure and health risk assessment model was used to appraise hazard. The results show that Cr, Cu, Ni and Zn contents were 6.03, 3.45, 1.64, and 1.45 times greater than their corresponding geochemical background values, respectively. The results of a series of model estimation indices including CF, DC, and Igeo suggest that soil of the investigated region is moderate contamination to high contamination due to various discrete sources. Non-carcinogenic risks for children and adults in the examined region were within the secure limits, while carcinogenic risk has a significant risk to the children in the study region. Therefore, necessary precautionary measures can be implemented in order to reduce the health risks in the study region.

Figure: Spatial distribution patterns of potentially toxic elements (PTEs) (Arsenic, lead, nickel, zinc, chromium and copper) in the soils of study area

Citation:

Narsimha Adimallaa, Hui Qiana, M.J. Nandan, Andrew S. Hursthouse; Ecotoxicology and Environmental Safety 203 (2020) 111055;https://doi.org/10.1016/j.ecoenv.2020.111055 external link