Distribution of selenium in surface waters of Tibet and environmental impact factors that determine its concentration

Zha, Xinjie; Tian, Yuan; Yu, Chengqun; Xiao, Jianyu

doi:10.1016/j.ecolind.2022.108534

Cited by 2 publications

(2 citation statements)

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“…Several studies have compared the average concentration of ETEs in drinking water in Tibet or surrounding areas of the study area: Li et al [52] analyzed the mean concentrations of Fe and Mo in the water of the Qinghai-Tibet Plateau and its surrounding areas, which were 28.75 μg/L and 0.44 μg/L, respectively; LaMu et al [53] collected and analyzed the average concentrations of Cu, Mn and Zn in surface water of Gongjue County, Qamdo City, which were 0.98 μg/L, 0.73 μg/L and 1.70 μg/L, respectively; Zha et al [35] sampled and analyzed the concentration of Se in surface water of Tibet, and the average value was 0.52 μg/L. As a result, the concentration of ETEs in drinking water is lower than the average of Tibet or its surrounding areas of the study area, especially Se.…”

Section: Discussionmentioning

confidence: 99%

“…Hence, calculating the local residents' ETEs intake and assessing their health effects are crucial. Zha et al [35] sampled and analyzed the concentration of Se in surface water of Tibet, and revealed that the Se concentration in Tibet's surface water was relatively low, with an average value of 0.519 μg/L (range of 0-3.944 μg/L). Tian et al [36] studied the concentrations of Cu and Mo of natural pasture plants and surface water in northern Tibet, and found that there were obvious regional differences in Cu and Mo concentrations, but there was no risk to human health.…”

Section: Introductionmentioning

confidence: 99%

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Dietary and drinking water intake of essential trace elements in a typical Kashin-Beck disease endemic area of Tibet, China

Zha

Gao

et al. 2022

Environ Health

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Background: Essential trace elements (ETEs), such as copper (Cu), iron (Fe), manganese (Mn), molybdenum (Mo), selenium (Se), zinc (Zn), are very important elements for human health. Methods:In this study, 89 drinking water samples and 85 highland barleys were collected from 48 villages in 11 townships, and the average daily dose (ADD) of ETEs were calculated, in addition, health effects of ETEs to rural residents in Luolong County, a typical Kashin-Beck disease (KBD) endemic area in Tibet, were assessed. Results:The mean concentrations of Cu, Fe, Mn, Mo, Se, Zn in drinking water were 0.278 ± 0.264 μg•kg −1 , 0.766 ± 0.312 μg•kg −1 , 0.411 ± 0.526 μg•kg −1 , 0.119 ± 0.223 μg•kg −1 , 0.155 ± 0.180 μg•kg −1 , and 0.804 ± 1.112 μg•kg −1 , respectively; and mean concentrations of Cu, Fe, Mn, Mo, Se and Zn in highland barley were 3.550 ± 0.680 mg•kg −1 , 81.17 ± 38.14 mg•kg −1 , 14.03 ± 1.42 mg•kg −1 , 0.350 ± 0.200 mg•kg −1 , 0.0028 ± 0.0056 mg•kg −1 , and 23.58 ± 3.10 mg•kg −1 , respectively. The ADD of Cu in the study area was appropriate; the ADD of Fe and Mn in each township were higher than the maximum oral reference dose recommended by the National Health Commission of China, indicating that Fe and Mn had non-carcinogenic health risks; the ADD of Mo and Zn in 36.36% and 54.55% of the townships exceeded the maximum oral reference dose; and 72.73% of the townships had insufficient ADD of Se. The ADD of Mo, Cu and Se in different townships was significantly correlated with the prevalence of KBD.Conclusions: Therefore, in order to prevent and control the prevalence of KBD and ensure the health of local residents, it is necessary to reduce the intake of high concentrations of Fe, Mn and Zn in diet, as well as increase the intake of Mo, Cu, especially Se.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%