The effect of pedogenic environments on iron oxide minerals
The effect of pedogenic environments on iron oxide minerals
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DOI：
10.1007/978-1-4612-5046-3_5
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发表时间：
1958
期刊：
影响因子：
--
通讯作者：
U. Schwertmann
中科院分区：
文献类型：
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作者：
U. Schwertmann
土壤颜色一直是全世界土壤学家感兴趣的问题。它已经进入了许多分类系统，甚至美国土壤分类学等现代分类都在不同程度上使用了土壤颜色。在各种颜色中，红色和黄色之间的色调最为普遍。它们是由不同形式和浓度的Fe(III)氧化物引起的(Taylor，1982；Torrent等人，1983)。从负面意义上讲，Fe(III)氧化物的缺乏表明了Fe还原和随后的去除的重要成土过程，从而留下了硅酸盐基质的灰色。铁(II)化合物可引起绿蓝或黑色。这些简短的评论表明，氧化铁可以作为土壤发生的指示物。成土作用是指在土壤地幔中发生的所有过程的总和。这些过程是由许多成儿因素诱导的，并且是这些因素的作用(Jenny，1980)。形成Fe(III)氧化物的主要反应是含Fe(II)的原生矿物[主要是Fe(II)硅酸盐]的水解和氧化分解：
Soil color is and has always been of interest to soil scientists around the world. It has entered into many classification systems and even modem classifications such as the US Soil Taxonomy use soil color at various levels.Among the various colors, the hues between red and yellow are most widespread. They are caused by various forms and concentrations of Fe (III) oxides (Taylor, 1982; Torrent et al., 1983). In a negative sense, the lack of Fe (III) oxides indicates the important pedogenic processes of Fe reduction and subsequent removal, thereby leaving the grey colors of the silicate matrix behind. Iron (II) compounds may induce green-blue or black colors. These brief comments show that iron oxides can function as indicators of pedogenesis. Pedogenesis comprises the sum of all processes which have taken place in the soil mantle. These processes are induced by and are functions of a number of pedogenic factors (Jenny, 1980). The primary reaction through which F e (III) oxides are formed is the hydrolytic and oxidative decomposition of Fe (II)-containing primary minerals [mainly F e (II) silicates]: