Research Abstracts

The cellulose hydrazone derivative is a novel product prepared from dialdehyde cellulose with 2-hydrazino3,5,6,7tetrahydrocyclopentanethieno[2,3-d]-pyrimidin-4(4H)-one under suitably selected conditions. It was found that the reaction of dialdehyde cellulose with the 2-hydrazino derivative decreased

Fouling of membranes by colloidal organic and inorganic particles continues to be documented as the most common and challenging obstacle in attaining stable continuous operation of reverse osmosis (RO) and ultrafiltration (UF) systems. Much current research is being conducted on physical parameters

In this study the secondary effluent after ODOBEZ system processing from a textile dyeing factory was recycled and reused in a dyeing bath. A pilot-scale combined system of a bio-activated carbon reactor (BAC) and membrane separation module (MS) was constructed and studied in detail. Through the eff

The effects of the composition of a surfactant colloidal solution containing nonylphenylpolyoxyethylene ether, the racemic mixture of L,D-phenylalanine, trans-4-hydroxy-L-proline and/or their copper complexes upon the flux of permeate and the resistance of the hydrophilic membrane and additional lay

A pilot plant study of a polysulfone ultrafiltration (MWCO of 30 kD) tubular membrane process was conducted for the treatment of reservoir water. The membrane separation system was operated in the cross-flow filtration mode at 4.7 m/s and the feed-and-bleed mode for a long term of 4000 h without che

The present investigation was undertaken to shed light on the failure of some 90/10 Cu-Ni condenser tubes in a MSF distiller. The tubes showed numerous tiny pits of unusual features. Particles of C were discovered inside the tubes and were suspected of initiating micro-galvanic cells leading to pitt

The feasibility of the removal of Ag+ ions in a model solution and a sample of rinse water provided from an industrial plating plant was investigated in a batch electrodialysis system. The experiments were carried out using two different types of ion-exchange membranes. The effects of applied potent

A mathematical model for the simulation of ultrafiltration process has been developed in this study. Ultrafiltration tests were carried out on an aqueous solution of lignosulphonate — a natural polymer — employing a pilot-scale ultrafiltration configuration that accommodates spiral wound membranes.

The filtration tests of electrolyte solutions performed with different ceramic membranes show that salt rejection depends on pH, salt nature and concentration. A simple correlation between streaming potential and rejection rates exits and confirms that streaming potential is a relevant parameter to

The tendency of solutes in input water to precipitate efficiency lowering scale deposits on the membranes of reverse osmosis (RO) desalination systems is an important factor in determining the suitability of input water for desalination. Simulated input water evaporation can be used as a technique t