Abstract
DPM (diesel particulate matter) is ubiquitously present in the mining environment and is known for mutagenicity and carcinogenicity to humans. However, its health effects in surface coal mines are not well studied, particularly in India. In this study, DPM exposure and corresponding exposure biomarkers were investigated in four different surface coal mines in Central India. To document and evaluate the DPM exposure in surface coal miners, we characterized 1-NP (1-nitropyrene) in the mining environment as surrogate for DPM using Sioutas Cascade Impactor. Exposure biomarkers were analyzed by collecting post work shift (8-h work shift) urine samples and determining the concentrations of 1-aminopyrene (1-AP) as a metabolite of 1-NP and 8-hydroxydeoxyguanosine (8OHdG) as DNA damage marker. We observed high concentration of 1-NP (7.13–52.46 ng/m3) in all the mines compared with the earlier reported values. The average creatinine corrected 1-AP and 8OHdG levels ranged 0.07–0.43 \(\mu\)g/g and 32.47–64.16 \(\mu\)g/g, respectively, in different mines. We found 1-AP in majority of the mine workers’ urine (55.53%) and its level was higher than that reported for general environmental exposure in earlier studies. Thus, the study finding indicates occupational exposure to DPM in all the four mines. However, the association between 1-NP level and exposure biomarkers (1-AP and 8OHdG) was inconsistent, which may be due to individual physiological variations. The data on exposure levels in this study will help to understand the epidemiological risk assessment of DPM in surface coal miners. Further biomonitoring and cohort study are needed to exactly quantify the occupational health impacts caused by DPM among coal miners.
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Data availability
The data used in the study and analysis are not publicly available but can be obtained from the corresponding author on legitimate request.
Abbreviations
- 1-AP:
-
1-Aminopyrene
- 1-NP:
-
1-Nitropyrene
- 8OHdG:
-
8-Hydroxydeoxyguanosine
- AT:
-
Averaging time
- BMI:
-
Body mass index
- CI:
-
Confidence interval
- DPM:
-
Diesel particulate matter
- EC:
-
Exposure concentration
- ED:
-
Exposure duration
- EF:
-
Exposure frequency
- ELISA:
-
Enzyme-linked immunosorbent assay
- ET:
-
Exposure time
- HPLC:
-
High performance liquid chromatography
- IUR:
-
Inhalation unit risk
- kU/mL:
-
Kilo enzyme unit per milliliter
- ml:
-
Milliliter
- mM:
-
Millimolar
- Nitro-PAH:
-
Nitrated polycyclic aromatic hydrocarbon
- PAH:
-
Polycyclic aromatic hydrocarbon
- USEPA:
-
United States Environmental Protection Agency
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Dinesh Wadikar is grateful to Council of Scientific and Industrial Research (CSIR), Government of India, for the award of Junior Research fellowship (reference number 31/016(0121)/2015-EMR-1). Authors are thankful to CSIR-NEERI, Nagpur, for providing the research facility and infrastructure. The manuscript represents CSIR-NEERI communication number CSIR-NEERI/KRC/2020/JULY/HTC-DRC-CTMD-EISD/1.
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Selection of locations, PM sampling, biomonitoring: DLW, MOF, SS, KK, AJV, and AM. Estimation of 1-NP: DW, SS, and YP. Estimation of 8OHdG: DW, SS, and AJV. First draft preparation: DW, PN, AB, and SS. Acquisition, interpretation of data, and risk assessment study: DW, SS, KK, and AJV. Aid for Logistics: KK, PN, YP, and AB. Significant revision for essential intellectual material of the article: SS and PN. Administrative and final endorsement of the article: SS and KK.
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All procedures performed including biomonitoring for biomarkers have been carried in compliance with due ethical principles. This study was duly endorsed and approved by the institutional ethics committee of CSIR-NEERI, Nagpur, India in accordance with ICMR (Indian Council of Medical Research) India guidelines vide letter no. Eth.Com./001/EC/EHD/7/2016.
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Wadikar, D.L., Farooqui, M.O., Middey, A. et al. Assessment of occupational exposure to diesel particulate matter through evaluation of 1-nitropyrene and 1-aminopyrene in surface coal miners, India. Environ Monit Assess 193, 342 (2021). https://doi.org/10.1007/s10661-021-09121-y
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DOI: https://doi.org/10.1007/s10661-021-09121-y