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To understand the concentration characteristics of fluoride in drinking water and the health risk of population exposure in Huanggang City, analyze the epidemic status of dental fluorosis in Huanggang City, and provide scientific basis for the prevention and control of endemic fluorosis.
Drinking water samples were collected from water quality monitoring sites in 10 counties of Huanggang City from 2020 to 2024, and the prevalence of dental fluorosis in children aged 8 to 12 years was randomly sampled from 24 villages in the drinking-water fluorosis area of Huanggang City. Excel 2016 and SPSS 20.0 were used to analyze the data. The health risk assessment model recommended by the United States Environmental Protection Agency (US EPA) was used for population health risk assessment.
A total of 3 850 drinking water samples were monitored in Huanggang City from 2020 to 2024. The median fluoride concentration was 0.19 mg/L, and the concentration range was 0.03-0.86 mg/L. There were significant differences in fluoride concentration among different years, water periods, disinfection methods and regions (χ2=60.695, Z=-8.908, χ2= 19.585, χ2=3 754.425; all P<0.001). Water fluorine was strongly correlated with pH, total dissolved solids and chloride (r=0.619, 0.520, 0.516, respectively; all P<0.001). The median and maximum hazard quotient (HQ) values for non-carcinogenic health risk from fluoride exposure through drinking water intake were less than 1, and the difference of non-carcinogenic health risk values among different regions was statistically significant (H=77.626, P=0.027). A total of 5 667 children from infected villages in Huanggang City were monitored from 2020 to 2024. The average annual detection rate of dental fluorosis was 0.49%, and the detection rate in five years ranged from 0.11%to 0.74%, with statistically significant differences among different regions (χ2=123.584, P<0.001).
From 2020 to 2024, the qualified rate of fluoride content in drinking water in Huanggang City was 100%, and the detection rate of dental fluorosis was less than 30%, which met the national standard of elimination of endemic fluorosis, but there are obvious differences between regions. Relevant departments need to focus on the health risk of fluoride exposure and the epidemic trend of dental fluorosis in Hong’an and Wuxue areas. We will take targeted measures to prevent and control endemic fluorosis.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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