典型土壤组分及其与丁草胺除草剂作用的红外光谱研究

运用红外光谱法对3种典型土壤（红壤、潮土和黑土）的矿物质、胡敏酸及其与丁草胺的吸附附着物进行了研究。结果表明，江西红壤为高岭石型矿物质，在3703，3628，1089，1035，914，696及471cm^-1处有特征吸收峰。北京潮土和黑龙江黑土为蒙脱土型矿物质，在1432和872cm^-1处有特征吸收峰，而在3703和3628cm^-1处吸收较弱或微弱。不同土壤中胡敏酸的组成基本相同，均在3420，2935，2847，1724，1660及1035cm^-1处有明显吸收，表明其含有缔合羟基、芳烃、羰基、醇、酚及酸等。丁草胺与土壤胡敏酸的吸附机理主要是在胡敏酸的羰基及酚醇羟基上形成氢键。

Study on Components of Typical Soils and the Adsorption with Herbicide Butachlor Using FTIR

The mineral substances and humic acids of three typical soils (red soil, fluvo-aquic soil and black soil) and their adsorption with herbicide butachlor were studied using Fourier transform infrared spectroscopy (FTIR).The results showed that the inorganic components of red soil from Jiangxi are mainly kaolinites, which rise absorption bands at 3 703, 3 628, 1 089, 1 035, 914, 696 and 471 cm~ -1, and that of fluvo-aquic soil from Beijing and black soil from Heilongjiang are mainly montmorillonites, which appear peaks at 1 432 and 872 cm~ -1. It also can be concluded that humic acids from different soils contain the same classifical functional groups, i.e. alkyl, aromatic hydrocarbons, carbonyl, ethanol, phenol and acid, etc. The mechanism of adsorption of butachlor on humic acids is the formation of H-bounds on carbonyl.