Recent Applications of Dynamic Membranes

Permeation and Separation Characteristics of Inorganic Membranes in Liquid Phase Applications

“…These types of new structures were described as formed-in-place or "dynamically formed" membranes. During the course of earlier investigations, various kinds of additives such as hydrous oxides, synthetic polyelectrolyte and natural polyelectrolytes (including those found in waste streams and pulp mill wastes) were used to prepare dynamically formed membranes (Kraus, Shor and Johnson 1967, Johnson, Minturn and Wadia 1972, Brandon, Gaddis and Spencer 1981, Groves et al 1983). These studies concluded that hydrous zirconium oxide (Zr(OH)4) polyacrylic acid [Zr(IV}-PAA] dual-layer membranes had the best performance characteristics for reverse osmosis applications as compared to many other kinds of formed-in-place membranes (Johnson, Minturn and Wadia 1972).…”

Dead-End Flow Filtration of Solid Suspension in Polymer Fluid through an Active Kaolin Dynamic Membrane

“…The dynamic membrane technique has been utilized for separations in various fields, e.g., textile dyeing wastewater (9,10), desalination (11), apple juice concentration (12), sugar solution clarification (13), and proteins separation (14). The advantages of using dynamic membranes include "in-situ" formation and regeneration, reducing "downtime" in the operating apparatus, long support life, high permeating flux, mechanical stability, and durability at high temperature and under a wide range of pH (15)(16)(17).…”