(武漢工業(yè)大學資源與環(huán)境工程系，武漢430070)
摘 要: 通過系統(tǒng)地研究糊精在赤鐵礦、金紅石等氧化礦表面的吸附規(guī)律發(fā)現(xiàn)：糊精在礦物表面的吸附與礦漿pH值有關(guān)，糊精在礦物表面的吸附密度最大值時pH值對應(yīng)于礦物表面等電點，這表明糊精主要是與礦物表面金屬羥基化合物發(fā)生作用，通過X射線光電子能譜(XPS)和俄歇電子能譜(AES)測定發(fā)現(xiàn):經(jīng)糊精處理前后，赤鐵礦表面Fe元素內(nèi)層電子結(jié)合能有明顯化學變化；金紅石表而Ti元素的俄歇參數(shù)也發(fā)生明顯化學位移，這表明糊精與赤鐵礦和金紅石表面的金屬羥基化合物發(fā)生了化學絡(luò)合反應(yīng)。
關(guān)鍵字: 糊精 赤鐵礦 金紅石 化學絡(luò)合作用
（Resource and Environment Engineering Department,
Wuhan University of Technology, Wuhan 430070）
Abstract:A systematic study has been carried out to investigate the adsorption behaviour of dextrin on oxidative minerals ( such as hematite, rutile). It was observed that dextrin adsorptions on hematite and rutile are strongly pH-dependent, with the pHrange in which dextrin has maximum adsorption around the isoelectron point of the minerals, which indicates that dextrin adsorption is accomplished through interactions with surface metal hydroxy complexes. By X-Ray
photoelectron spectroscopy (XPS) and Auger electron spectroscopy (AES), it was discovered that, before and after the interaction between oxide minerals and dextrin, both core electronic energies of Fe element in hematite and Auger parameters of Ti element in rutile varied obviously, showing that significant chemical interaction occurred between metal hydroxy complexes of hematite and rutile.
Key words: dextrin hematite rutile chemical complex interaction
