【摘要】：為查明某鈾尾礦庫周邊土壤中鈾元素的空間分布特征及污染程度,對該鈾尾礦庫進(jìn)行了現(xiàn)場采樣,利用便攜式XRF元素分析儀進(jìn)行了原位測試,并采用SPSS軟件對鈾元素的測試數(shù)據(jù)進(jìn)行了統(tǒng)計分析。結(jié)果表明:該鈾尾礦庫周邊土壤中鈾元素含量的平均值分別是中國及其所在省土壤中鈾元素含量背景值的4倍和2.3倍,而樣品中鈾元素含量變異系數(shù)達(dá)到61.84%,屬于強(qiáng)變異,且樣品中鈾元素含量的統(tǒng)計頻數(shù)屬于正偏態(tài)分布,這說明該鈾尾礦庫對其周邊土壤產(chǎn)生了一定的污染效應(yīng)。在統(tǒng)計分析基礎(chǔ)上,運(yùn)用單因子污染指數(shù)法與地質(zhì)累積指數(shù)法,并結(jié)合Arc GIS空間分析功能對該鈾尾礦庫周邊土壤中鈾元素污染程度進(jìn)行了定量評價,評價結(jié)果表明,主要污染區(qū)域集中在該鈾尾礦庫壩址區(qū)0~500 m范圍內(nèi)及尾礦庫NE側(cè)的應(yīng)急處理池周圍0~100 m內(nèi),該評價結(jié)果可為鈾尾礦庫治理及植物修復(fù)提供基礎(chǔ)數(shù)據(jù)。
[Abstract]:In order to find out the spatial distribution characteristics and contamination degree of uranium elements in the soil around a uranium tailings reservoir, the in-situ sampling of the uranium tailings reservoir was carried out, and the in-situ test was carried out by using a portable XRF element analyzer. The test data of uranium are analyzed by SPSS software. The results show that the average value of uranium element content in the soil around the uranium tailings reservoir is 4 times and 2.3 times of the background value of the soil uranium element content in China and its provinces, while the variation coefficient of uranium element content in the sample reaches 61.84, which is a strong variation. The statistical frequency of uranium content in the sample is positive distribution, which indicates that the uranium tailings reservoir has a certain pollution effect on the surrounding soil. On the basis of statistical analysis, using single factor pollution index method and geological accumulation index method, combined with the spatial analysis function of Arc GIS, the degree of uranium element pollution in the soil around the uranium tailings reservoir was quantitatively evaluated. The main polluted area is concentrated in the area of 0 ~ 500m in the dam site of the uranium tailing reservoir and within 100 m around the emergency treatment pool on the NE side of the tailings reservoir. The evaluation results can provide basic data for the treatment and phytoremediation of the uranium tailing reservoir.
【作者單位】： 西南科技大學(xué)核廢物與環(huán)境安全國防重點(diǎn)學(xué)科實(shí)驗(yàn)室;
【基金】：國家自然科學(xué)基金資助項(xiàng)目(41402248) 非金屬復(fù)合與功能材料科技部重點(diǎn)實(shí)驗(yàn)室開放基金資助項(xiàng)目(11zxfk06) 核廢物與環(huán)境安全國防重點(diǎn)學(xué)科實(shí)驗(yàn)室團(tuán)隊(duì)基金資助項(xiàng)目(13zxnk08) 核廢物與環(huán)境安全四川省協(xié)同創(chuàng)新中心預(yù)研基金資助項(xiàng)目(15yyhk03) 西南科技大學(xué)重點(diǎn)科研平臺專職科研創(chuàng)新團(tuán)隊(duì)基金資助項(xiàng)目(14tdhk01);西南科技大學(xué)研究生創(chuàng)新基金資助項(xiàng)目(15ycx051,15ycx052) 四川省教育廳科研項(xiàng)目資助(16ZB0150) ***治理與生物修復(fù)關(guān)鍵技術(shù)研究與工程集成項(xiàng)目資助(14zg6101)
【分類號】：X753;X825
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本文編號：2119330