Research Abstracts

A simple semi-theoretical steady-state model for the convective flux in cross-flow microfiltration has been developed based on the mass balance. The model, which has two coefficients, A and K, can describes the cake increase on membrane surfaces in a hollow-fiber membrane module and predicts its mem

Based on the assumption that the variation rate of average thickness of the deposition layer is proportional to the difference in the masses of solutes brought to the membrane surface by the bulk fluid flow and the solutes removed from the membrane surface by the shear rate of the tangential flow, a

A novel positively charged composite NF membrane was prepared using a copolymer graft of trimethylallyl ammonium chloride onto chitosan (GCTACC) as the top selective layer, a poly(acrylonitrile (PAN) ultrafiltration membrane as the support layer and toluene diisocyanate (TDI) as the cross-linking re

The removal of binary mixed metal ions [Hg(II), Pb(II), Cu(II) and Cr(III)] from water was investigated. Two different sewage sludge-based adsorbents were produced and used for this purpose: PS, obtained by pyrolysis of sewage sludge, and AS, by ZnCl2 chemical activation of sewage sludge followed by

A theoretical study was made on the effect of a cooling tower on a solar desalination system. A prototype unit was designed using the humidification–dehumidification principle. It had the following independent components: a humidifier, a condenser, two solar collectors of air and of water, and a coo

In a previous paper, the performance of the humidification–dehumidification (HD) desalination process was optimized through mathematical programming. In this paper, by adding a solar system to the model, the total solar HD system is optimized. The main purpose of this optimization is the reduction o

The treatment by nanofiltration of real solutions of industrial solid waste leachate using the charged Nanomax-50 membrane, largely used in industrial water treatment, was investigated. The retention of zinc, present in coercive quantities, was studied according to the experimental parameters. The r

A carrier anaerobic baffled reactor (CABR), containing hollow-sphere bamboo carriers, was used to examine the effects of organic and temperature shock loads for a constant hydraulic retention time. The relationships among the macroscopic observables (pH, COD and SS), catabolic intermediates (VFA) an

We investigated the electrokinetic properties of sepiolite suspensions using the microelectrophoresis technique as a function of pH in the presence of various electrolytes such as, LiCl, NaCl, KCl, Cu(NO3)2, CaCl2, Pb(NO3)2, AlCl3 and Fe(NO3)3 and then, the adsorption of Cu(II) ion onto sepiolite fr

Molecular dynamics simulation and Density Functional Theory were used to investigate the adsorption of two kinds of anti-scalant, ethane diphosphonic acid (EDPA) and polyether polyamino methylene phosphonate (PAPEMP), on the calcite (104) surface in order to increase the level of understanding of th