| 土壤可见光-近红外反射光谱与重金属含量之间的相关性 |
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| 引用本文： | 解宪丽,孙波,郝红涛. 土壤可见光-近红外反射光谱与重金属含量之间的相关性[J]. 土壤学报, 2007, 44(6): 982-993 |
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| 作者姓名： | 解宪丽 孙波 郝红涛 |
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| 作者单位： | 中国科学院南京土壤研究所,南京,210008 |
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| 基金项目： | 中国科学院知识创新工程项目;国家自然科学基金 |
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| 摘 要： | 发展基于反射光谱技术的快速、简便、低成本的土壤重金属信息提取方法是区域土壤重金属污染治理所需要的。选择江西贵溪铜冶炼厂污染区,分析了9种重金属元素(Cu、Pb、Zn、Cd、Co、Ni、Fe、Mn及Cr)与土壤可见光-近红外反射光谱之间的相关性及其相关的原因。研究表明,研究区土壤中存在Cu(含量介于66.71~387 mg kg-1之间)和Cd(含量介于0.36~6.019 mg kg-1之间)的强烈富集。土壤重金属含量与反射光谱之间存在显著相关,污染元素Cu的最高相关系数为-0.87,Pb、Zn、Co、Ni、Fe的最高相关系数达到高度相关(|r|>0.80),Cr、Cd、Mn的最高相关系数达到显著相关(|r|>0.70)。微分光谱适于获取土壤中的重金属元素信息,利用组合波段能显著提高相关性。Cu与反射光谱之间的相关性主要受有机质的影响;Pb、Zn、Co、Ni主要受黏土矿物和铁锰氧化物的影响;Cr与反射光谱之间的相关性同时受有机质和黏土矿物的影响。
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| 关 键 词： | 土壤污染 重金属元素 反射光谱 可见光-近红外 相关关系 |
| 收稿时间： | 2006-07-06 |
| 修稿时间： | 2006-07-06 |
RELATIONSHIP BETWEEN VISIBLE-NEAR INFRARED REFLECTANCE SPECTROSCOPY AND HEAVY METAL OF SOIL CONCENTRATION |
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| Xie Xianli,Sun Bo and Hao Hongtao. RELATIONSHIP BETWEEN VISIBLE-NEAR INFRARED REFLECTANCE SPECTROSCOPY AND HEAVY METAL OF SOIL CONCENTRATION[J]. Acta Pedologica Sinica, 2007, 44(6): 982-993 |
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| Authors: | Xie Xianli Sun Bo Hao Hongtao |
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| Affiliation: | Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China |
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| Abstract: | A rapid,simple and low-cost method,based on the technology of reflectance spectroscopy,for measuring soil heavy metal contents is needed for monitoring and remedying heavy metal contaminated soils.Soil samples were collected from a Cu-Cd contaminated area in the vicinity of a copper smeltery in Guixi,Jiangxi Province,to explore relationships between visible-infrared reflectance spectra and contents of Cu,Zn,Pb,Cd,Cr,Co,Mn,Ni,and Fe in the heavy metal contaminated soil and their mechanisms.Results show that Cu(ranging from 66.7 mg kg-1 to 387 mg kg-1) and Cd(from 0.36 mg kg-1 to 6.02 mg kg-1) were highly enriched in the soil,and reflectance spectra of the soil samples were significantly related to contents of heavy metals in the soil,with the highest correlation coefficient of Cu being-0.87,of Pb,Zn,Co,Ni and Fe being > 0.80,and of Cr,Cd and Mn being >0.70.Derivative spectra are applicable to extraction of information of heavy metals in soils and bands combination may significantly improve their correlations.The relationship of Cu with reflectance spectra was affected by organic matter;of Zn,Pb,Co,and Ni,by silicate minerals and ferriferous-manganese oxides;and of Cr,by both organic matter and clay minerals. |
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| Keywords: | Soil pollution Heavy metal Reflectance spectroscopy Visible-near infrared Relationship |
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