Research Abstracts

The application of chitosan as the coagulant/flocculant in a microfiltration process of natural water has been evaluated. In order to study fouling effects, variations in permeation velocity of demineralized water were measured at the beginning and at the end of each microfiltration experiment. Expe

This work studied the reduction of humic acids (HA) by continuous electromagnetic (EM) treatment followed by electrocoagulation (EC) in batch of synthetic HA solution using two aluminium electrodes at neutral pH. After continuous EM treatment until the filling of the electrocoagulator, the solution

The possibility of influent carbon source usage by influent bypass flow strategy in the anaerobic–anoxic–oxic (AAO) process was investigated, aiming at enhancing biological nitrogen removal based on enriched denitrifying phosphate accumulating organisms (DNPAOs). Tests were made to verify whether ni

The potential of enhancing As(III) removal was investigated in a pilot study for the process of oxidation, precipitation and direct sand filtration as pretreatment before ultrafiltration. The pretreatment effectively facilitated As(III) removal and residual arsenic was below 10 µg/L for membrane eff

The thermodynamics of cloud point extraction (CPE) of three different dyes are investigated. Dyes used are congo red, eosin and chrysoidine. Iso-octyl phenoxy polyethoxy ethanol (TX-100) and octyl phenol poly ethylene glycol ether (TX-114) are used as non-ionic surfactant. The effects of different o

! The removal of NO3 by a CuCrO2-mediated catalytic photoprocess was investigated under mild conditions. The delafossite CuCrO2 exhibits an excellent chemical stability over the whole pH range and relatively a large specific surface area when elaborated by chemical means. The optical gap was found t

Microfiltration (MF) does not remove color, natural organic matter (NOM) or synthetic organic chemicals (SOCs). It must be combined with other conventional technologies such as activated carbon adsorption to overcome some of these limitations. The effects of granular activated carbon (GAC) addition

A local clay from Jebel Chakir (northwest of Tunis, Tunisia, North Africa) has been characterized. The mineralogical and chemical compositions of the materials were determined by X-ray diffraction (XRD), infrared spectroscopy (IR) and by the inductively coupled plasma technique (ICP). The cation exc

An automatic pH–ORP (oxidation–reduction potential) titration device was developed and applied to dynamically control the wastewater chlorination and dechlorination doses in this study. In the pH–ORP titration and back-titration process, the monitoring peaks and valleys on the pH and ORP profiles co

The fate and transport of toxic metal ions and radionuclides in the environment are generally controlled by sorption reactions. The extent of sorption of divalent metal cations is controlled by a number of factors including the presence of other cosorbing or complexing ions. In this work, the effect