Health Risk Assessment of Professional Operating Personnel in Methanol Wastewater Reinjection Stratigraphic Process

Based on the high concentration of methanol wastewater in the process of natural gas exploitation in Shan Bei gas field, considering the blank of no methanol concentration controlling in our industrial wastewater reinjection stratigraphic standard, is conducted investigation on the concentration of methanol wastewater reinjection stratigraphic in Shan Bei gas field. According to the sampling analysis of the locale methanol wastewater, the methanol concentration in the air of reinjection operating room is determined by GC-MS method as 420mg/m3 , the methanol concentration of wastewater is 51670 mg/L. Using the risk assessment principle, adopting the probability statistical method and Monte-Carlo stimulation method, health risk assessment is conducted for operators, aiming at the process of methanol wastewater reinjection formation of this concentration, then the result shows that the methanol wastewater of this concentration will cause unacceptable health risk for operating personnel, the life time health risk is 1.93E-04, the average annual health risk is 2.75E-06. Considering methanol dose on both exposure and reference basis for humans, combining the corresponding risk representation models, and the permissible discharging concentration of methanol wastewater which dose not cause health risk for operating personnel during reinjection stratigraphic process is proposed, this concentration can be determined as the limit value for methanol wastewater reinjection stratigraphic to provide a reference for methanol wastewater discharge standards domestically as well.

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Health Risk Assessment for the Exposure of Workers to BTEX at the Gasoline Stations

Journal of Applied Sciences and Environmental Management ◽

10.4314/jasem.v25i1.10 ◽

2021 ◽

Vol 25 (1) ◽

pp. 71-77

Author(s):

Nguyen Thanh Giao ◽

Phan Kim Anh ◽

Huynh Thi Hong Nhien

Keyword(s):

Risk Assessment ◽

Cancer Risk ◽

Health Risk ◽

Health Risk Assessment ◽

Life Time ◽

The United States ◽

Gasoline Station ◽

Toxic Gases ◽

Benzene Toluene ◽

Risk Of Cancer

The study was conducted to assess the health risks of workers due to exposure to toxic gases including benzene, toluene, ethylbenzene, m, p-xylene, o-xylene, formaldehyde and acetaldehyde at gasoline retail stations. In this study, data on the concentrations of the toxic gases were collected from the previously published studies in the qualified scientific journals. The health risk assessment was followed by the process of the United States Environment Protection Agency (U.S. EPA). The results show that the concentrations of benzene, toluene, ethylbenzene, m, p-xylene, o-xylene, formaldehyde, and acetaldehyde were in the range of 12.40 - 357.5, 12.47 - 574.17, 2.05 - 156.5, 4.57 - 218, 2.36 - 77.04, 3.64 - 153.93 and 1.27- 27.83 µg/m3 , respectively. Life time cancer risk for gasoline station workers due to exposure to benzene, ethylbenzene, formaldehyde, and acetaldehyde was calculated in the ranges of 2.13x10-5 - 6.14x10-4 , 4.96x10-7 - 3.79x10-5 , 4.81x10-6 - 2.03x10-4 , and 7.99x10-7 - 1.75x10-5 , respectively. For non-carcinogenic compounds, the hazard index due to benzene, toluene, m, p-xylene, o-xylene were respectively in the range of 0.13 - 3.81, 7.97x10-4 - 0.04, 0.01 - 0.70 and 0.01 - 0.25. The findings revealed that there is high risk of cancer and non-cancer for the workers working at the gasolines stations if they are not taking good preventive measures. The calculation showed that the limit levels of benzene, toluene, ethylbenzene, xylene, formaldehyde and acetaldehyde should be reduced to 5.82x10-4 , 15.64, 4.13x10- 3 , 0.31, 7.57x10-4 and 1.59x10-3 mg/m3 , respectively to meet the safety levels for the workers at the gasoline stations. Keywords: benzene, toluene, ethylbenzene, xylene, formaldehyde, acetaldehyde, life-time cancer risk, health

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Health Risk Assessment of Wastewater with Carbinol in Gas Field

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.178-181.424 ◽

2012 ◽

Vol 178-181 ◽

pp. 424-428

Author(s):

Peng Kang Jin ◽

Xing Wang Ning ◽

Xin Jin ◽

Xian Bao Wang

Keyword(s):

Risk Assessment ◽

Health Risk ◽

Health Risk Assessment ◽

Health Risks ◽

Human Body ◽

Scientific Basis ◽

Risk Level ◽

Acceptable Risk ◽

Soil Infiltration ◽

Gas Field

The carbinol in wastewater from inhalation and direct contact present more risk to human health, as well as cause hazard to ecological environment through waste water emission directly and soil infiltration. In this paper, health risk assessment of wastewater with carbinol in gas field is performed using mathematical models of non-carcinogenic health risk assessment. The results show that the non-carcinogenic health risks caused by wastewater with carbinol are in the range of 6.33×10-5 to 9.20×10-5, which are much higher than the acceptable risk level 7.00×10-5. Through the calculation of the threshold of the carbinol concentration in the wastewater, the carbinol concentration in the wastewater is less than 24500mg/L, not on human body risks. However, the carbinol concentration in the wastewater is much than 24500mg/L, it is a health risk to human body, which provides the scientific basis for the prevention and mitigation of wastewater with carbinol health risks.

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Human health risk assessment related to blue-green algae mass development in the Kuibyshev Reservoir

Water Science & Technology Water Supply ◽

10.2166/ws.2015.022 ◽

2015 ◽

Vol 15 (4) ◽

pp. 693-700 ◽

Cited By ~ 2

Author(s):

O. V. Nikitin ◽

N. Yu. Stepanova ◽

V. Z. Latypova

Keyword(s):

Risk Assessment ◽

Health Risk ◽

Health Risk Assessment ◽

Algal Bloom ◽

Human Health Risk ◽

Recreational Activity ◽

High Concentration ◽

Kuibyshev Reservoir ◽

Blue Green Algae ◽

Dangerous Level

Health risk assessment related to water quality and microcystin contamination of water in the Kuibyshev Reservoir was conducted in August 2012 during the period of algal bloom. The health risk during recreational activity was estimated for potential exposure to extracellular microcystins. Microcystin content in water measured by the indirect competitive ELISA method was in the range from 0.21 to 26.96 μg L−1. The results of the present study show that the health risk can reach a dangerous level even at 1 h of exposure due to the high concentration of extracellular microcystins in the water.

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Health Risk Assessment of Metals (Cu, Pb, Zn, Cr, Cd, As, Hg, Se) in Angling Fish with Different Lengths Collected from Liuzhou, China

International Journal of Environmental Research and Public Health ◽

10.3390/ijerph17072192 ◽

2020 ◽

Vol 17 (7) ◽

pp. 2192 ◽

Cited By ~ 6

Author(s):

Jun Li ◽

Xiongyi Miao ◽

Yupei Hao ◽

Zhouqing Xie ◽

Shengzheng Zou ◽

...

Keyword(s):

Risk Assessment ◽

Health Risk ◽

Health Risk Assessment ◽

Health Risks ◽

Hazard Quotient ◽

Wild Fish ◽

Target Hazard Quotient ◽

Fish Length ◽

High Concentration ◽

Length Range

Wild fish caught by anglers (WFAs) were confirmed to be usually contaminated with metals, and the contamination status is radically affected by the growth and length of the fish. To determine the contamination levels of metals and health risks in WFAs with different length ranges of fish, this study ascertained the concentration of eight metals, including Cu, Pb, Zn, Cr, Cd, As, Hg and Se, in 171 wild fishes collected from the watershed of Liujiang River. The assessment of metal pollution and health risks from the consumption of these fishes with seven length ranges were accomplished. The obtained results implied a relatively high concentration of Zn, Cr, and Cd up to 109.294 mg/kg, 4.226 mg/kg, and 0.196 mg/kg (wet weight), respectively, which exceed the corresponding Maximum Residue Limit (MRL). The negative correlation between Cu, Zn, Cr, and Cd was observed to be significant with fish length, signifying a possible occurrence of biological dilution on these metals. The WFAs were mostly contaminated with Cr and Cd irrespective of the length ranges of fish, which were denoted by the average pollution index (Pi) of Cr and Cd and were commonly found to be beyond 0.2. Based on the results of health risk assessment analysis, most of the target hazard quotient (THQ) values of Cr were below 1, implying that the consumption of wild fish for adults has insignificant health risk. For children, the total target hazard quotient (TTHQ) values of beyond 1 were found in fishes with the length range of <25 cm, particularly a TTHQ value 1.627 in the range of 10–15 cm, indicating that children are being prone to serious health risks owing to the consumption of WFAs. The weekly recommended consumption of WFAs with the length range of 10–15 cm for adults and children was 0.298 kg/week and 0.149 kg/week, respectively. These are substantially lower than the current rate of fish consumption (0.42 kg/week), and therefore, the wild fish with the length range of 10–15 cm should be avoided for consumption.

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