人工合成氧化铁矿物对土壤光谱特性的影响

通过化学合成和去除技术与光谱测定技术,研究了人工合成氧化铁矿物对土壤的反射光谱特性的影响,结果表明,添加人工合成针铁矿后土壤的光谱反射曲线在350~600 nm和840~1100 nm波段有明显的吸收谷,含不同比例人工合成针铁矿的土壤光谱反射率之差的最大值出现在418 nm处,另外在932 nm处也有一个比较大的差值。添加人工合成水铁矿后土壤的光谱反射曲线在450~720 nm和860~1400 nm波段有明显的吸收谷,另外在1900 nm处也有较明显的差异,含不同比例人工合成水铁矿的土壤光谱反射率之差的最大值出现在551 nm处,另外在946 nm处和1900 nm处也有比较大的差值。添加人工合成赤铁矿后土壤的光谱反射曲线在450~720 nm和860~1400 nm波段有明显的吸收谷,含不同比例人工合成赤铁矿的土壤光谱反射率之差的最大值出现在517 nm处,另外在916 nm处也有比较大的差值。

The Spectral Characteristics of Major Types of the Synthetic Iron Oxide Minerals

The spectral characteristics of major types of the synthetic iron oxide minerals were studied through laboratory and spectral measurement,the result show that there existed distinct absorption valleys in the ranges of wavelength from 350nm to 600 nm and from 840 nm to 1100 nm after addition of synthetic goethite,The maximum difference between the reflectance of the soils with varied content of goethite existed at the wavelength of 418 nm,and also,there was a larger difference of reflectance of the soils with varied content of goethite at the wavelength of 932 nm.There appeared distinct absorption valleys in the ranges of wavelength from 450 nm to 720 nm and from 860 nm to 1100 nm,and there was a more distinct difference of reflectance at the wavelength of 1900 nm after addition of hematite.The maximum difference between the reflectance of the test soils wiuh varied content of hematite existed at the wavelength of 551 nm,and there were larger differences of reflectance at the wavelengths of 946 nm and 1900 nm after addition of the varied content of hematite.There appeared distinct absorption valleys in the ranges of wavelength from450nm to 720nm and from 860nm to 1100 nm,and there was a more distinct difference of reflectance at the wavelength of 1900nm after addition of ferrihydrite.The maximum difference between the reflectance of the test soils with varied content of hematite existed at the wavelength of 551 nm,and there were larger differences of reflectance at the wavelengths of 946 nm and 1900 nm after addition of the varied content of ferrihydrite.