Work

Probabilistic modelling is superior to deterministic approaches in the human health risk assessment: an example from a tribal stretch in central India

Year: 2023

Type: article

Abstract: This case drew national attention in 2018. About 100 people died and more than 300 hospitalized in a span of few years in a village of 1200 people in a tribal stretch in central India. Medical teams visiting the area reported severe renal failure and blamed the local eating and drinking habits as causative factors. This human health assessment based on geochemical investigations finds nitrate (NO 3 − ) and fluoride (F − ) pollution as well in village’s groundwater. Both deterministic and probabilistic techniques are employed to decipher the contamination pathways and extent of contamination. Source apportionments of NO 3 − and F − and their relationship with other ions in groundwater are carried out through chemometric modelling. Latent factors controlling the hydrogeochemistry of groundwater too are explored. While hazard quotients ( $$HQ$$ HQ ) of the chemical parameters ( $$HQ_{{{\text{NO}}_{3}^{ - } }}$$ H Q NO 3 - and $$HQ_{{{\text{F}}^{ - } }}$$ H Q F - ) identify ingestion as the prominent pathway, the calculated risk certainty levels (RCL) of the hazard index (HI) values above unity are compared between the deterministic and probabilistic approaches. Deterministic model overestimates the HI values and magnify the contamination problems. Probabilistic model gives realistic results that stand at infants ( $$HI_{{{\text{NO}}_{3}^{ - } }}$$ H I NO 3 - = 34.03%, $$HI_{{{\text{F}}^{ - } }}$$ H I F - = 24.17%) > children ( $$HI_{{{\text{NO}}_{3}^{ - } }}$$ H I NO 3 - = 23.01%, $$HI_{{{\text{F}}^{ - } }}$$ H I F - = 10.56%) > teens ( $$HI_{{{\text{NO}}_{3}^{ - } }}$$ H I NO 3 - = 13.17%, $$HI_{{{\text{F}}^{ - } }}$$ H I F - = 2.00%) > adults (

Source: Scientific Reports

DOI: 10.1038/s41598-023-45622-1

Authors: Rajkumar Herojeet, Rakesh K. Dewangan, Pradeep K. Naik, Janak R. Verma

Institutions: Post Graduate Government College, Sector 11, Chandigarh, Central Ground Water Board, Ministry of Jal Shakti

Language: English

Topic: Water Quality and Pollution Assessment

Subfield: Water Science and Technology

Field: Environmental Science

Domain: Physical Sciences

SDGs: Clean water and sanitation, Good health and well-being

Open Access status: gold

Estimated APC paid: $2,390