Pb Content, Risk Level and Primary-Source Apportionment in Wheat and Rice Grains in the Lihe River Watershed, Taihu Region, Eastern China

This study detailed a complete research from Lead (Pb) content level to ecological and health risk to direct- and primary-sources apportionment arising from wheat and rice grains, in the Lihe River Watershed of the Taihu region, East China. Ecological and health risk assessment were based on the pollution index and US Environmental Protection Agency (EPA) health risk assessment model. A three-stage quantitative analysis program based on Pb isotope analysis to determine the relative contributions of primary sources involving (1) direct-source apportionment in grains with a two-end-member model, (2) apportionment of soil and dustfall sources using the IsoSource model, and (3) the integration of results of (1) and (2) was notedly first proposed. The results indicated that mean contents of Pb in wheat and rice grains were 0.54 and 0.45 mg/kg and both the bio-concentration factors (BCF) were <<1; the ecological risk pollution indices were 1.35 for wheat grains and 1.11 for rice grains; hazard quotient (HQ) values for adult and child indicating health risks through ingestion of grains were all <1; Coal-fired industrial sources account for up to 60% of Pb in the grains. This study provides insights into the management of grain Pb pollution and a new method for its source apportionment.

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Water Quality Pollutants and Health Risk assessment for Four Different Drinking Water Sources

E3S Web of Conferences ◽

10.1051/e3sconf/20197803004 ◽

2019 ◽

Vol 78 ◽

pp. 03004

Author(s):

Miaomiao Tian ◽

Wenzhao Li ◽

Meijuan Ruan ◽

Jing Wei ◽

Weiwei Ma

Keyword(s):

Water Quality ◽

Risk Assessment ◽

Drinking Water ◽

Health Risk ◽

Health Risk Assessment ◽

Rural Areas ◽

Assessment Model ◽

Risk Level ◽

Risk Assessment Model ◽

Acceptable Risk

Drinking water quality has become a great concern to the whole society, especially in heavily polluted rural areas. This paper analyzes the water quality of 100 water supping the US Environmental Protection Agency's (USEPA) recommended health risk assessment model. The results showed that the microbial indicators exceeded the standard in the whole year, and some of the water supply units which lead, nitrated and dissolved solids exceeding the standard. The model recommended by EPA is applied to establish risk assessment model for health risk assessment of adults in wet and dry seasons, respectively. Results of HRA indicated that carcinogenic risk of chromium was 7.61E-05a-1 and the risk value of arsenic was 9.92E-06a-1 which exceed the maximum acceptable risk level recommended by USEPA 5.0×10-5 closely to the ICPR recommendation 1.0×10-6. Meanwhile we conduct health risk assessment (HRA) on relevant non-carcinogenic indicators: nitrate is 2.95E-09a-1, the risk value of fluoride (F) is 2.49E-09a-1, the risk value of lead is 2.39E-09a-1 and copper (Cu) 9.00E-10a-1 exceeds the maximum acceptable risk level risk value recommended by USEPA 1.0×10-9. The above indicators require priority control and management of pollutants that are prioritized and managed.

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Determination and Health Risk Assessment of Heavy Metals on the Source of Underground Water in Yulin City

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.587-589.776 ◽

2014 ◽

Vol 587-589 ◽

pp. 776-779 ◽

Cited By ~ 1

Author(s):

Ya Ning Zhang ◽

Hai Ying Han ◽

Xi Jun Wu

Keyword(s):

Heavy Metals ◽

Risk Assessment ◽

Drinking Water ◽

Health Risk ◽

Health Risk Assessment ◽

Underground Water ◽

Assessment Model ◽

Risk Level ◽

Carcinogenic Substances ◽

Yulin City

The source of the underground water in Yulin city were applied to monitor and evaluate five kinds of heavy metals which are Cr6+, Cd, As, Pb and Hg, and it revealed that the concentration of them were lower than the "drinking water health standards" (GB5749-2006), taking the source of drinking water in Yulin University as an example. A preliminary health risk assessment of the risk caused by drinking water has been done, based on the health risk assessment model recommended by USA Environmental Protection Agency. The datum showed that the health risk of carcinogenic substances (Cr6+, Cd and As) were much larger than that of non-carcinogenic substances (Pb, Hg) , so the priority control sequence should be Cr6+>Cd>As>Pb>Hg. The result showed that, human health of personal annual risk caused by the heavy metal pollutants in drinking water from the campus of Yulin University had exceeded the acceptable health risk level of 5 × 10-5/a which is established by the Radiation Protection Committee. Cr6+ is the main contribution, and should cause the attention of the relevant departments, also is the priority governance indicators.

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Determination of Hydrargyrum and Arsenic in Tap Water of Chongqing University Town and Human Health Risk Assessment

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.396-398.2088 ◽

2011 ◽

Vol 396-398 ◽

pp. 2088-2091

Author(s):

Ling Yan Ren ◽

Gang Xu

Keyword(s):

Risk Assessment ◽

Drinking Water ◽

Health Risk ◽

Health Risk Assessment ◽

Tap Water ◽

Assessment Model ◽

Risk Level ◽

Atomic Fluorescence Spectrometry ◽

University Town ◽

The Way

Hydrargyrum(Hg) and arsenic(As) in tap water of Chongqing University Town were detected by the X-atomic fluorescence spectrometry, and the United States Environmental Protection Agency (USEPA)-supported Health Risk Assessment Model was used for evaluating the potential health risk to surrounding residents caused by Hg and As in tap water. The results showed that the average concentration of Hg and As in tap water of this region were 0.6323μg/L and 20.1237μg/L respectively, wherein the Hg content was lower than the national Standards for Drinking Quality (GB5749-2006), but the As content exceeded its stipulated level, the annual personal risk level of health hazard caused by Hg and As by the way of drinking water were 2.840×10-8•a-l and 1.350×10-4•a-l, wherein Hg would not cause apparent harm to exposure population, while As was higher than the maximum acceptable risk level by the way of drinking water（5×10-5•a-l）recommended by the International Committee on Radiological Protection (ICRP).

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