钙离子对高锰酸钾与天然有机物反应的影响

Effect of calcium ion on reaction of potassium permanganate and natural organic matter

利用单宁酸做为天然有机物的代表研究了高锰酸钾与天然有机物的反应,考察了钙离子及钙离子和高锰酸钾不同投加顺序的影响及机理,并利用FTIR对反应进行了光谱学研究.结果表明,高锰酸钾与单宁酸反应生成可溶性分子,钙离子和高锰酸钾不同投加顺序对二者反应有一定的影响,先投加钙离子再投加高锰酸钾,溶液UV276.5的降低较多一些,DOC去除率较高一些,反应较充分.钙离子存在时单宁酸与高锰酸钾反应后生成大量固体成分,FTIR光谱的结果证实了此作用现象和机理.因此钙离子和有机物形成络合物,影响高锰酸钾与水中天然有机物的反应.

The reaction of potassium permanganate and natural organic matter was investigated.Effect of calcium ion and different dosing order of calcium and potassium permanganate were studied.FTIR spectra was employed for further spectroscopy study.Results showed that the reaction product of potassium permanganate and tannic acid were some soluble organic material,different dosing order of calcium and potassium permanganate has effect on the reaction.The addition of potassium permanganate after calcium presented the result of lower UV276.5 and DOC.FTIR spectra results showed that calcium ion increases the quantity of solid product.Consequently,it indicated that calcium ion chelates with organic matter and has important effect on the reaction of potassium permanganate and natural organic material.