Industrial metal pollution in water and probabilistic assessment of human health risk

Saha, Narottam, Rahman, M. Safiur, Ahmed, Mohammad Boshir, Zhou, John L., Ngo, Huu Hao and Guo, Wenshan (2017) Industrial metal pollution in water and probabilistic assessment of human health risk. Journal of Environmental Management, 185 70-78. doi:10.1016/j.jenvman.2016.10.023


Author Saha, Narottam
Rahman, M. Safiur
Ahmed, Mohammad Boshir
Zhou, John L.
Ngo, Huu Hao
Guo, Wenshan
Title Industrial metal pollution in water and probabilistic assessment of human health risk
Journal name Journal of Environmental Management   Check publisher's open access policy
ISSN 1095-8630
0301-4797
Publication date 2017-01-01
Year available 2016
Sub-type Article (original research)
DOI 10.1016/j.jenvman.2016.10.023
Open Access Status Not yet assessed
Volume 185
Start page 70
End page 78
Total pages 9
Place of publication London, United Kingdom
Publisher Academic Press
Language eng
Subject 2305 Environmental Engineering
2311 Waste Management and Disposal
2308 Management, Monitoring, Policy and Law
Abstract Concentration of eight heavy metals in surface and groundwater around Dhaka Export Processing Zone (DEPZ) industrial area were investigated, and the health risk posed to local children and adult residents via ingestion and dermal contact was evaluated using deterministic and probabilistic approaches. Metal concentrations (except Cu, Mn, Ni, and Zn) in Bangshi River water were above the drinking water quality guidelines, while in groundwater were less than the recommended limits. Concentration of metals in surface water decreased as a function of distance. Estimations of non-carcinogenic health risk for surface water revealed that mean hazard index (HI) values of As, Cr, Cu, and Pb for combined pathways (i.e., ingestion and dermal contact) were >1.0 for both age groups. The estimated risk mainly came from the ingestion pathway. However, the HI values for all the examined metals in groundwater were <1.0, indicating no possible human health hazard. Deterministically estimated total cancer risk (TCR) via Bangshi River water exceeded the acceptable limit of 1 × 10 for adult and children. Although, probabilistically estimated 95th percentile values of TCR exceeded the benchmark, mean TCR values were less than 1 × 10. Simulated results showed that 20.13% and 5.43% values of TCR for surface water were >1 × 10 for adult and children, respectively. Deterministic and probabilistic estimations of cancer risk through exposure to groundwater were well below the safety limit. Overall, the population exposed to Bangshi River water remained at carcinogenic and non-carcinogenic health threat and the risk was higher for adults. Sensitivity analysis identified exposure duration (ED) and ingestion rate (IR) of water as the most relevant variables affecting the probabilistic risk estimation model outcome.
Formatted abstract
Concentration of eight heavy metals in surface and groundwater around Dhaka Export Processing Zone (DEPZ) industrial area were investigated, and the health risk posed to local children and adult residents via ingestion and dermal contact was evaluated using deterministic and probabilistic approaches. Metal concentrations (except Cu, Mn, Ni, and Zn) in Bangshi River water were above the drinking water quality guidelines, while in groundwater were less than the recommended limits. Concentration of metals in surface water decreased as a function of distance. Estimations of non-carcinogenic health risk for surface water revealed that mean hazard index (HI) values of As, Cr, Cu, and Pb for combined pathways (i.e., ingestion and dermal contact) were >1.0 for both age groups. The estimated risk mainly came from the ingestion pathway. However, the HI values for all the examined metals in groundwater were <1.0, indicating no possible human health hazard. Deterministically estimated total cancer risk (TCR) via Bangshi River water exceeded the acceptable limit of 1 × 10−4 for adult and children. Although, probabilistically estimated 95th percentile values of TCR exceeded the benchmark, mean TCR values were less than 1 × 10−4. Simulated results showed that 20.13% and 5.43% values of TCR for surface water were >1 × 10−4 for adult and children, respectively. Deterministic and probabilistic estimations of cancer risk through exposure to groundwater were well below the safety limit. Overall, the population exposed to Bangshi River water remained at carcinogenic and non-carcinogenic health threat and the risk was higher for adults. Sensitivity analysis identified exposure duration (ED) and ingestion rate (IR) of water as the most relevant variables affecting the probabilistic risk estimation model outcome.
Keyword Deterministic approach
Health risk analysis
Monte-Carlo simulation
Probabilistic approach
Water pollution
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Earth Sciences Publications
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