Spatial distribution variation and probabilistic risk assessment of exposure to chromium in ground water supplies; a case study in the east of Iran

Fallahzadeh, Reza Ali; Khosravi, Rasoul; Dehdashti, Bahare; Ghahramani, Esmail; Omidi, Fariborz; Adli, Abolfazl; Miri, Mohammad

doi:10.1016/j.fct.2018.03.019

Cited by 109 publications

(39 citation statements)

References 34 publications

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“…The Hazard quotient which is used in neurological risk assessment research was applied to assess the individual cumulative exposure level. 12 As mentioned before, the hazard quotient is obtained from inhalation intake divided by the minimal risk level (MRL); MRL amounts for BTEX are 0.003, 1, 0.06 and 0.05, respectively. The affecting parameters for calculation of inhalation intake are exposure level, age and work duration, which influence on the neurobehavioral functions.…”

Section: Resultsmentioning

confidence: 99%

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Evaluation of occupational exposure to different levels of mixed organic solvents and cognitive function in the painting unit of an automotive industry

Golbabaei¹,

Dehghani²,

Saatchi³

et al. 2018

Health Promot Perspect

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Background: The cognitive function could be affected following exposure to organic solvents.The purpose of this study was to examine the cognitive performance of workers exposed to different levels of organic solvents in a painting unit of an automotive industry.Methods: This case-control study was conducted, in 2017, on 121 and 111 workers from the painting and assembly units of an automotive industry as the case and control groups,respectively. Exposure of workers to organic solvents were determined according to National Institute for Occupational Safety and Health (NIOSH) method. The cognitive performance of the studied population was evaluated by the computerized tests.Results: The obtained scores of the N-Back in 1 and 2 blocks and the simple reaction time tests(SRTTs) were significantly differed in the exposed group (p<0.05). No significant difference was observed between case and control groups in the Stroop test score (p> 0.05). Moreover, a significant relationship between the hazard quotient and the cognitive function test scores were observed except the Stroop test.Conclusion: Exposure to organic solvents affect the cognitive functions even below the Occupational Exposure Limits (OELs). Moreover, workers with high exposure levels of organic solvents had highest risk of poor memory and reaction time.

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Section: Resultsmentioning

confidence: 99%

“…In order to assess cumulative and lifetime relative risk, the hazard quotient index (HQ) was utilized. 12 Using to the following equation, cumulative exposure to organic solvents was calculated for each subject.…”

Section: Methodsmentioning

confidence: 99%

Evaluation of occupational exposure to different levels of mixed organic solvents and cognitive function in the painting unit of an automotive industry

Golbabaei¹,

Dehghani²,

Saatchi³

et al. 2018

Health Promot Perspect

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“…The water samples were transported to the laboratory in 4° and stored in a dark place at room temperature until analysis. Fluoride concentration of water samples were analyzed by SPADNS method using UV-visible Spectrophotometer (DR/5000, USA) [11] , [12] , [13] , [14] , [15] , [16] , [17] , [18] , [19] , [20] , [21] .…”

Section: Experimental Design Materials and Methodsmentioning

confidence: 99%

Data on health risk assessment of fluoride in water distribution network of Iranshahr, Iran

et al. 2018

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The main of this data was determine the concentrations and health risks of fluoride in 66 drinking water samples collected from villages of the Iranshahr city, Sistan and Baluchestan Province in Iran. Fluoride concentration was measured by the standard SPADNS method. Data indicated that fluoride concentration in drinking water ranged from 0.25 to 1.72 mg L−1 and average of fluoride concentration was 0.27 mg L−1. The mean estimated daily intake (EDI) values for fluoride in different groups of infants, children, teenagers and adults were 0.0021, 0.0151, 0.0107 and 0.0086 mg/kg, respectively. Also, risk assessment data indicated that hazard quotient (HQ) value of groundwater samples is more than 1 in 6% of groundwater samples in age groups of children and teenagers.

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“…e Cr(VI) concentrations of groundwater (monitoring wells S1-S3) nearby the COPR dumpsite range from 766.9 to 1347.5 mg/L, which significantly exceeded the V grade value (0.1 mg/L) of Quality Standard for Groundwater (GB/T 14848-2017) [24] and drinking water standard (0.05 mg/L) of WHO guideline [8].…”

Section: High Concentration Of Cr(vi) In Top Soils Shallowmentioning

confidence: 99%

“…e drinking water standard for total Cr of US EPA is 100 μg/L [7]. e permitted concentration of Cr(VI) in drinking water based on the World Health Organization (WHO) guideline is 0.05 mg/L [8].…”

Section: Introductionmentioning

confidence: 99%

Adsorption Characteristics and Transport Behavior of Cr(VI) in Shallow Aquifers Surrounding a Chromium Ore Processing Residue (COPR) Dumpsite

Liu

Li²,

Hu³

et al. 2019

Journal of Chemistry

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This study explored the stratigraphic distribution and soil/shallow aquifer characteristics surrounding a chromium ore processing residue (COPR) dumpsite at a former chemical factory in China. Total Cr levels in top soils (5–10 cm) nearby the COPR dumpsite were in the range of 8571.4–10711.4 mg/kg. Shallow aquifers (1–6 m) nearby the COPR dumpsite showed a maximum total Cr level of 9756.7 mg/kg. The concentrations of Cr(VI) in groundwater nearby the COPR dumpsite were 766.9–1347.5 mg/L. These results display that the top soils, shallow aquifers, and groundwater of the study site are severely polluted by Cr(VI). Then, three aquifers (silt, clay, and silty clay), respectively, collected from the depth of 1.4–2.4 m, 2.4–4.8 m, and 4.8–11.00 m were first used to evaluate the adsorption characteristics and transport behavior of Cr(VI) in shallow aquifers by both batch and column experiments. The adsorption of Cr(VI) on tested aquifers was well described by pseudo-second-order equation and Freundlich model. The adsorption capacities of Cr(VI) on three aquifers followed the order: clay > silty clay > silt. The kinetics proved that Cr(VI) is not easily adsorbed by the aquifer mediums but transports with groundwater. Thermodynamics indicated that Cr(VI) adsorption on tested aquifers was feasible, spontaneous, and endothermic. Cr(VI) adsorption on tested aquifers decreased with increasing pH. Furthermore, the transport of Cr(VI) in adsorption columns followed the sequence of clay < silty clay < silt. Desorption column experiments infer that the Cr(VI) adsorbed on aquifers will desorb and release into groundwater in the case of rainwater leaching. Therefore, a proper treatment of the COPR and a comprehensive management of soils are vital to prevent groundwater pollution.

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Spatial distribution variation and probabilistic risk assessment of exposure to chromium in ground water supplies; a case study in the east of Iran

Cited by 109 publications

References 34 publications

Evaluation of occupational exposure to different levels of mixed organic solvents and cognitive function in the painting unit of an automotive industry

Evaluation of occupational exposure to different levels of mixed organic solvents and cognitive function in the painting unit of an automotive industry

Data on health risk assessment of fluoride in water distribution network of Iranshahr, Iran

Adsorption Characteristics and Transport Behavior of Cr(VI) in Shallow Aquifers Surrounding a Chromium Ore Processing Residue (COPR) Dumpsite

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