本文選題：湯峪水庫　切入點(diǎn)：稀土元素　出處：《環(huán)境科學(xué)學(xué)報(bào)》2016年12期

【摘要】：利用ICP-MS和BCR連續(xù)提取法分別研究了西安藍(lán)田湯峪水庫沉積物中稀土元素含量和形態(tài)分布特征,并與中國土壤、渭南黃土和洛川黃土稀土元素含量進(jìn)行了比較.結(jié)果表明:樣品平均值均高于中國土壤和洛川黃土稀土元素含量,除La、Ce外,其它稀土元素均低于渭南黃土稀土元素含量;其中,Ce的含量分別是中國土壤、渭南黃土、洛川黃土的1.49、1.28和1.63倍.湯峪水庫沉積物中稀土元素總量(∑REE)達(dá)211.41 mg·kg-1,∑LREE/∑HREE為9.99,均高于中國土壤、渭南黃土、洛川黃土;Ce的異常系數(shù)值為1.28,表明存在Ce的富集.由BCR連續(xù)提取法分析可知,Gd的酸可提取態(tài)(F1)比例高于其它形態(tài),Gd由沉積物中向上覆水體遷移的可能性較強(qiáng),產(chǎn)生的潛在環(huán)境效應(yīng)也最明顯.物源指示分析表明,湯峪水庫沉積物中的稀土元素物質(zhì)來源與洛川黃土相似.
[Abstract]:The contents and speciation of rare earth elements in sediments of Tangyu Reservoir in Lantian County, Xi'an, were studied by ICP-MS and BCR successive extraction methods, and were compared with the soils of China. The contents of rare earth elements in Weinan loess and Luochuan loess are compared. The results show that the average value of samples is higher than that of Chinese soil and Luochuan loess, and the contents of other rare earth elements are lower than those of Weinan loess except LaCe. The contents of ce in the sediments of Tangyu Reservoir are 211.41 mg 路kg ~ (-1) and 9.99 mg 路kg ~ (-1), respectively, which are higher than those of Chinese soil, Weinan loess and Weinan loess. The anomalous coefficient of ce in Loess Loess of Luochuan is 1.28, which indicates that there is enrichment of ce. According to the analysis of BCR's continuous extraction method, the ratio of acid extractable form of Gd is higher than that of other forms of Gd, and the possibility of migration of Gd from sediment to overlying water is stronger. The source indication analysis shows that the REE material source in the sediments of Tangyu reservoir is similar to that of Luochuan loess.
【作者單位】： 榆林學(xué)院建筑工程學(xué)院;西安建筑科技大學(xué)西北水資源與環(huán)境生態(tài)教育部重點(diǎn)實(shí)驗(yàn)室;
【基金】：國家自然科學(xué)基金(No.41373093) 陜西省自然科學(xué)基金(No.2011JM5004) 西北旱區(qū)生態(tài)水利工程國家重點(diǎn)實(shí)驗(yàn)室培育基地開放研究基金(No.2013KFKT-3)~~
【分類號(hào)】：X524

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