电感耦合等离子体质谱法研究黄河甘宁蒙段附近居民砷暴露水平（英文）

发布时间：2019-01-02 16:30

【摘要】：人类砷暴露可以通过空气、饮用水和食物等途径。运用ICP-MS方法分析了四个采样点河曲(Hequ,HQ)、石嘴山(Shizuishan,SZS)、中卫(Zhongwei,ZW)和临夏(Linxia,LX)的69份当地居民发样及四个黄河过滤水样的总砷含量,探究了头发中砷水平在不同性别及年龄中的差异,并对发样中砷与水样中砷的相关性进行了分析。人发样品采用微波消解方法进行前处理,消解效果良好。结果表明,该方法准确度及精密度良好,回收率为90.1%~101.9%,RSD值为2.9%~4.2%。结果显示,该研究地区居民发样砷含量范围为0.01~1.73μg·g-1,平均值为0.33μg·g-1,不同采样点的砷含量顺序为ZWHQLXSZS。Kruskal Wallis检验显示该文中不同采样点发样砷含量存在显著性差异(p=0.010),说明研究地区的生活区域对居民发样砷含量具有影响,而不同性别(p=0.158)和不同年龄(p=0.159)组居民发样砷含量无明显差异,但男性发砷平均值含量高于女性,不同年龄组间呈现发样砷含量随年龄增大而下降的趋势。与文献相比,该研究发样砷含量较高于多数地区而明显低于地方性砷中毒区域。黄河水样中砷含量范围为2.31~10.41μg·L-1。与黄河下游等地区相比砷含量较高,但未超出地表水环境Ⅲ类标准。Pearson相关性系数表明,水中砷元素与铅、铜、铬、镉等元素均具有相关性,与人发砷含量具有显著正相关。总之,采样点附近居民具有较高砷暴露风险,且该风险可能来自于工农业排放。研究结果为甘宁蒙等西北民族地区重金属污染研究提供实验数据和理论依据。
[Abstract]:Human arsenic exposure can be achieved through air, drinking water and food. The total arsenic content of 69 samples from four sampling sites (Hequ,HQ, Shizuishan,SZS, Zhongwei,ZW and Linxia,LX) and four samples from Yellow River filtered water were analyzed by ICP-MS method. The differences of arsenic levels in hair between different sex and age were investigated, and the correlation between arsenic in hair and arsenic in water was analyzed. The pretreatment of human hair samples by microwave digestion shows that the digestion effect is good. The results showed that the accuracy and precision of the method were good, the recovery rate was 90.1% 101.9% and the RSD value was 2.9% and 4.2%. The results showed that the range of arsenic content in hair samples of residents in the study area was 0.01 渭 g / g ~ (-1) and the average value was 0.33 渭 g / g ~ (-1), and the average value was 0.33 渭 g / g ~ (-1). The order of arsenic content in different sampling sites was ZWHQLXSZS.Kruskal Wallis test. The results showed that there was significant difference in arsenic content in hair samples from different sampling sites (p0. 010), which indicated that the living area of the study area had an effect on the arsenic content in hair samples of residents. However, there was no significant difference in hair arsenic content among different sex groups (pF0.158) and different age groups (pF0.159), but the average content of hair arsenic in males was higher than that in females, and the arsenic content in hair samples decreased with age in different age groups. Compared with the literature, the arsenic content in hair samples of this study was higher than that in most areas and was significantly lower than that in endemic arsenism areas. The range of arsenic content in the water samples of the Yellow River is 2.31 渭 g / L ~ (-1) and 10.41 渭 g / L ~ (-1). Compared with the lower reaches of the Yellow River, the arsenic content is higher, but does not exceed the class 鈪，

本文编号：2398721