鄱阳湖湿地土壤中胡敏素对氨氮的吸附性能研究

通过在鄱阳湖湿地土壤取样,采用吸附实验及运用红外光谱表征等方法,研究胡敏素对氨氮的吸附规律。实验结果表明:胡敏素较符合Freundlich模型,即对NH+4-N的吸附表现为多层吸附;参与吸附反应的基团可能是芳香环、脂肪类、酚类或是Si—O键等,且NH+4-N可能是通过氢键、质子转移或范德华力等弱作用吸附在胡敏素上;p H、温度或胡敏素的量对吸附反应均有影响。

STUDY ON ADSORPTION CHARACTERISTIC OF AMMONIA NITROGEN ON WETLAND SOIL HUMINS OF POYANG LAKE

Through sampling in Poyang Lake wetland soil，this paper researched the adsorption experiment and used infrared spectroscopy characterization，and studied the adsorption characteristic of ammonia nitrogen on soil humins． Results showed that the humin accorded with the Freundlich model，and the adsorption was multiple． The aromatic ring，fat，phenols or groups，such as Si—O keys，were likely to be involved in the adsorption reaction and NH + 4 －N was likely to be through hydrogen bonding，proton transfer or Van der Waals force to be adsorped on humin． pH，temperature and the amount of humin had certain influence on the adsorption reaction．