干旱区生态环境知识资源中心(Arid): 西北旱作农田黄土指纹图谱的光谱学鉴定

Arid

	西北旱作农田黄土指纹图谱的光谱学鉴定
其他题名	Spectral Identification of Fingerprint Spectrum of Loess of Arid Farmland in Northwest China
	范春辉 1; 贺磊 1; 张颖超 2; 王家宏 1; 马宏瑞 1
来源期刊	光谱学与光谱分析
ISSN	1000-0593
出版年	2013
卷号	33 期号:6 页码:1697-1700
中文摘要	采用扫描电子显微镜(SEM)、 X射线荧光光谱(XRF)、 X射线衍射(XRD)、傅里叶变换红外光谱(FTIR)等手段对西北典型旱作农田黄土样品进行表征,Tessier连续提取法分析黄土Pb的赋存形态及含量。结果发现: 黄土样品比表面积较大(291 m~2·g~(-1)),粉粒土壤占到80.87%的比例。黄土表面轮廓清晰,可见颗粒聚集形成叠片状结构,晶片厚约3~5 mum。黄土矿物相主要为石英和钾云母,同时含有少量钾长石和蛇纹石等。 FTIR图谱表明高岭石和方解石也是构成黄土样品的重要组分,但有机质的特征峰不明显,说明土样中有机质含量较低。 Tessier连续提取法表明: 土样中Pb全量比陕西省和全国土壤Pb的平均含量要高,其中残渣态Pb占Pb全量的64.04%。黄土指纹图谱的鉴定可以为后续污染土壤修复研究提供参考。
英文摘要	The approaches of scanning electron microscopy (SEM), X-ray fluorescence spectrometry (XRF), X-ray diffraction spectroscopy (X RD) and Fourier transform infrared spectroscopy (FTIR) were mainly used to analyz e the loess characteristics of arid farmland in northwest China, and the Tessier sequential extraction method was utilized to determine the Pb content of differ ent chemical speciation. The results showed: that the specific surface area is 2 91 m~2·g~(-1) and the silt particles account for 80.87% of total loess sam ples. The sample structure, composed of particles, appears on clear surface with chip thickness of 3~5 mum. The dominant mineral phase is quartz and potassium mica, with small amounts of K-feldspar and serpentine. In addition, the kaolini te and calcite are important components indicated from FTIR spectra with low con tent of organic matter. The content of Pb in loess sample is higher than that of Shaanxi province and nationwide, the residual speciation of Pb accounts for 64.04% of total Pb content. The achievements are significant for the remediation of polluted soil in future.
中文关键词	黄土 ; 光谱鉴定 ; 指纹图谱 ; Tessier提取法
英文关键词	Loess Spectral identification Fingerprint spectrum Tessier sequential extract ion method
语种	中文
国家	中国
收录类别	CSCD
WOS类目	CHEMISTRY ANALYTICAL
WOS研究方向	Chemistry
CSCD记录号	CSCD:4832600
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/229725
作者单位	1.陕西科技大学资源与环境学院, 西安, 陕西 710021, 中国; 2.清华大学环境学院, 北京 100084, 中国
推荐引用方式 GB/T 7714	范春辉,贺磊,张颖超,等. 西北旱作农田黄土指纹图谱的光谱学鉴定[J],2013,33(6):1697-1700.
APA	范春辉,贺磊,张颖超,王家宏,&马宏瑞.(2013).西北旱作农田黄土指纹图谱的光谱学鉴定.光谱学与光谱分析,33(6),1697-1700.
MLA	范春辉,et al."西北旱作农田黄土指纹图谱的光谱学鉴定".光谱学与光谱分析 33.6(2013):1697-1700.