摘要
将北纬 3 0°～ 3 2°亚热带花岗岩发育的两个淋溶土B层黏粒样分别用连二亚硫酸钠—柠檬酸钠—重碳酸钠 (DCB)溶液溶提处理和经DCB溶液处理后再用柠檬酸钠溶液溶提处理。从上述处理后样品的X射线衍射图谱中可看出 :供试土壤的膨胀性矿物层间有羟基物质 ,它们能被DCB溶液—柠檬酸钠溶液所溶解提取 ,含羟基物质的黏土矿物主要来源于蛭石 ,少量来自蒙皂石。DCB溶液—柠檬酸钠溶液处理前后黏粒红外差分光谱上显示的 980～ 970cm- 1 ,91 0～940cm- 1 吸收带 ,标志着供试土壤膨胀性矿物层间含有羟基铝硅酸和羟基铝离子。从而首次揭示了中国中南地区淋溶土的膨胀性矿物层间有羟基铝硅酸。
Two clay samples from B horizon in Alfisols developed from granite and distributed in subtropical zones,covering 30°～32° north latitude were treated with DCB solution and 1/3 mol L 1 Na citrate solution after DCB solution treatment respectively The X ray diffractometry patterns of the clay samples before and after the treatments show that:there were hydroxy materials in interlayer spaces between expansible silicate layers of the soil clay tested They could be extracted by DCB-Na citrate solution and mainly derived from vermiculite or some of them also could be derived from smectite The differential FTIR spectra of the DCB-Na citrate solution treated samples show the pre sence of hydroxy aluminosilicate(HAS),hydroxy Al interlayers These results provide evidence that HAS occurs in the interlayer spaces of expansible minerals in Afisol in central China
出处
《土壤学报》
CAS
CSCD
北大核心
2002年第3期326-333,共8页
Acta Pedologica Sinica
基金
加拿大自然科学和工程研究委员会
中国国家自然科学基金委员会资助项目 (No .4 9371 0 4 0 )
关键词
中南地区
淋溶土
层间羟基物矿物
Hydroxy interlayered material,Alfisol,Hydroxy alumino silicate,Hydroxy aluminum
