胡敏酸－铜复合物热分解特征的研究

Pyrolytic Characteristics of Humic Acid-Copper Compound Substances

运用差热分析法（ＤＴＡ）对３种土壤胡敏酸－铜复合物的热分解特征进行了分析。结果表明；络合物与吸附物的热解曲线都有共同相似的热效应峰，ＤＴＡ曲线的第１，２放热峰可作为区分络合物与吸附物的特征峰。随结合物中配位数（ｘ）及吸附物中含铜量的增加，ＤＴＡ曲线第１，２放热峰面积及焓变值（△Ｈ）均增大。

Three kinds of soil humic acid-copper compound substances were,with differential thermal arfalysis (DTA)method,divided into two types of complexes and ad-sorbed substances. pyrolytic ctirves of both showed similar heat effect peaks.The first and the second exothermic peaks of DTA curves were the feature peaks which can be used to distingtiish complexes from adsorbed substances.The areas and enthalpy change values(△H)of the both peaks increased with the increase of coordination number(x)of the complexes and copper contents of the adsorbed substance.