【摘要】：人類砷暴露可以通過空氣、飲用水和食物等途徑。運(yùn)用ICP-MS方法分析了四個(gè)采樣點(diǎn)河曲(Hequ,HQ)、石嘴山(Shizuishan,SZS)、中衛(wèi)(Zhongwei,ZW)和臨夏(Linxia,LX)的69份當(dāng)?shù)鼐用癜l(fā)樣及四個(gè)黃河過濾水樣的總砷含量,探究了頭發(fā)中砷水平在不同性別及年齡中的差異,并對(duì)發(fā)樣中砷與水樣中砷的相關(guān)性進(jìn)行了分析。人發(fā)樣品采用微波消解方法進(jìn)行前處理,消解效果良好。結(jié)果表明,該方法準(zhǔn)確度及精密度良好,回收率為90.1%~101.9%,RSD值為2.9%~4.2%。結(jié)果顯示,該研究地區(qū)居民發(fā)樣砷含量范圍為0.01~1.73μg·g-1,平均值為0.33μg·g-1,不同采樣點(diǎn)的砷含量順序?yàn)閆WHQLXSZS。Kruskal Wallis檢驗(yàn)顯示該文中不同采樣點(diǎn)發(fā)樣砷含量存在顯著性差異(p=0.010),說明研究地區(qū)的生活區(qū)域?qū)用癜l(fā)樣砷含量具有影響,而不同性別(p=0.158)和不同年齡(p=0.159)組居民發(fā)樣砷含量無明顯差異,但男性發(fā)砷平均值含量高于女性,不同年齡組間呈現(xiàn)發(fā)樣砷含量隨年齡增大而下降的趨勢(shì)。與文獻(xiàn)相比,該研究發(fā)樣砷含量較高于多數(shù)地區(qū)而明顯低于地方性砷中毒區(qū)域。黃河水樣中砷含量范圍為2.31~10.41μg·L-1。與黃河下游等地區(qū)相比砷含量較高,但未超出地表水環(huán)境Ⅲ類標(biāo)準(zhǔn)。Pearson相關(guān)性系數(shù)表明,水中砷元素與鉛、銅、鉻、鎘等元素均具有相關(guān)性,與人發(fā)砷含量具有顯著正相關(guān)。總之,采樣點(diǎn)附近居民具有較高砷暴露風(fēng)險(xiǎn),且該風(fēng)險(xiǎn)可能來自于工農(nóng)業(yè)排放。研究結(jié)果為甘寧蒙等西北民族地區(qū)重金屬污染研究提供實(shí)驗(yàn)數(shù)據(jù)和理論依據(jù)。
[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，

本文編號(hào)：2398721