Effect of Al(III) and Sulfate Ion on Flocculation Kinetics
作者： Prasit Sricharoenchaikit , Raymond D. Letterman
DOI: 10.1061/(ASCE)0733-9372(1987)113:5(1120)
关键词: Adsorption 、 Coagulation (water treatment) 、 Polystyrene 、 Suspension (chemistry) 、 Chemical engineering 、 Flocculation 、 van der Waals force 、 Polymer chemistry 、 Chemistry 、 Particle 、 Kinetics
摘要: The kinetics of orthokinetic flocculation a dilute monodispersed polystyrene suspension initially coated with aluminum hydrolysis products (AHP) and destabilized by sulfate ion addition can be described modified Saffman Turner kinetic model. modifications include: (1) substituting for the collision efficiency parameter an expression which includes effect hydrodynamic forces, as well double‐layer repulsion van der Waals attraction on particleparticle interaction; (2) relating volume fraction, ϕ, to amount adsorbed AHP; (3) assuming that unadsorbed AHPs are deposited particle function time after addition. rate uptake AHP is assumed surface chemical conditions; probably transported flocculating particles coagulating microcrystals or aggregating polymeric forms, consequently ϕ increases time.
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