太原理工大学学报2017，Vol.48Issue(4)：545-550,6.DOI:10.16355/j.cnki.issn1007-9432tyut.2017.04.006
磁性膨润土絮凝剂沉降煤泥水的机理分析
The Mechanism Analysis of Coal Slime Water Settled by Magnetic Bentonite Flocculant
摘要
Abstract
Aiming at the settlement problem of coal silme water derived from the washing of high ash and sulfur coal,a new type of Fe3 O4-chitosan/bentonite composite flocculant was synthesized by solvothermal method.Through focusing on the effect of the pH value of coal slurry water on the settlement process,combining with the physical and chemical properties of the flocculant,the flocculation precipitation mechanisms between slime water properties and flocculation were investigated.The results indicate that the flocculant containing —NH3+electropositive groups can effectively reduce the electronegativity of the slurry surface,the electrostatic effect between coal particles and the Van der Waals repulsive potential energy and significantly improve the effect of slurry particle hydrophobic aggregation at pH=5.The flocculant possesses certain reusability with the help of additional magnetic field.关键词
絮凝剂/膨润土/壳聚糖/煤泥水沉降/扩展DLVO理论Key words
flocculant/bentonite/chitosan/coal slime water settlement/extended DLVO theory分类
化学化工引用本文复制引用
章青芳,肖宇强,乔晨,马清亮,马建超,申迎华..磁性膨润土絮凝剂沉降煤泥水的机理分析[J].太原理工大学学报,2017,48(4):545-550,6.基金项目
国家自然科学青年基金资助项目:磁性核壳结构膨润土基煤泥水沉降复合絮凝剂的制备研究(51204119) （51204119）
山西省青年科学基金资助项目:磁响应性絮凝剂的组装设计与嵌套结构形成机理研究(2014021015-4) （2014021015-4）
磁性Fenton层状结构材料的构筑及其对焦化废水污染物的吸附-氧化协同作用机制研究(2015021107) （2015021107）
