阳离子聚电解质对油污泥的絮凝作用机理

用高密度电荷阳离子聚电解质处理油污泥［１，２］，依靠其与粘土颗粒间的静电作用压缩污泥中固相颗粒的表面双电层，中和ζ电位，使其颗粒间斥力减小，引力增大，油污泥化学脱稳，致使粘土颗粒聚集絮凝成团块，油颗粒聚集，实现油、水、泥渣的三相分离．１　实验部分１．１　样品制备　现场采集的油污泥中油品含量１９％，固含量８％，体系漏斗粘度３７ｓ，密度１．０９ｇ／ｃｍ３．阳离子聚电解质（ＣＦ）、聚丙烯酰胺－丙烯酸β－羟基丙酯基三甲基氯化铵按文献［２，３］方法制备，平均分子量２．６０×１０６，阳离子电荷度４５％．阴离…

Flocculation Mechanism of Cationic Polyelectrolyte to Oily Sludge

Acationic polyelectrolyte with a high density charge, its average molecular weight was 2.60×10⁶and cationic character reached 45%, adsorbed on the particles with the adsorption pattern of static electricity gravitation between the cationic groups and the clay surface with negative charges. It could be neutralize the ζpotential of clay particle surface to 0mV and keep with 0 mV, and make the capillary suction time of oily sludge reduce to 100～200 s and finally make it chemical destabilization, but also make the fine grains(diameter under 20μm) be effectively flocculated and swept away. The flocculating reaction kinetics of cationic polyelectrolyte to solid particles of oily sludge was made certain as second order reactions.