Research Abstracts

Extraction of zinc(II) from model hydrochloric acid solutions was studied by Lewis cell mixing the bulks of both phases and keeping a stable interfacial surface. It was found that Lewis cell experiments, although dynamic in nature, support the extracting of ZnCl2*2 TBP and H2ZnCl4*2TBP chlorocomplex

There is a stringent need for the control of toxic metals produced during various production processes and released into the aqueous environment in order to avoid damage relevant to soil or groundwater contamination. Among the available treatment technologies, sorption has been considered of particu

Due to the low concentrations of persistent organic pollutants (POPs) in seawater, a special method of analysis is needed. The aim of this work was to prepare the detailed procedure for the determination of POPs in seawater and establish the level of pollution by selected POPs (seven PCBs, DDT and i

The results of nanofiltration of natural waters have been described using the extended Nernst– Planck equation. The model of NF based on that DS-5-DK DS-5-DK 1) Gl. 1MPa 1) Gl. 2MPa 1) ww 2MPa 2) Gl. 1MPa 2) Gl. 2MPa 2) ww 2MPa / p lp / Xp [ m] 1) Gl. 1MPa 1) Gl. 2MPa 1) ww 2MPa 2) Gl. 1MPa 2) Gl. 2

Selective and transport properties of an anion-exchange hollow-fiber membrane (Pervasiv Ltd., Israel) were determined in the sweeping gas pervaporation process used for the dehydration of different organic solvents. C2– C4 alcohols (i.e. ethanol — EtOH, propanol — nPrOH, isopropanol — iPrOH, n-butan

Driving force membrane processes seem to be most useful for water treatment. Reverse osmosis, nanofiltration and ultrafiltration have been applied to phthalate removal from water. In the experiment three membranes RO-DS3SE were tested for reverse osmosis, membrane NF-DS5DK for nanofiltration and UF-

The importance of wastewater treatment in the food industry is growing nowadays, because of the rising cost of water and because of environmental pollution. The aim of this study was to decrease the chemical oxygen demand (COD) of two different wastewaters originated from the food industry. If the t

To produce healthy drinking water is the main problem almost all over the world. The aim of this study is to find an efficient method to remove humic substances (HS) from water, because HS cause some types of cancer when they react with chlorine or other disinfection materials composing disinfection

Composite cellulose acetate (CA) based membranes having a hydrophobic top layer made of polymethylhydrosiloxane (PMHS) were prepared with the aim of desalination of brackish waters from the Sahel region of Tunisia having a total dissolved salt content (TDS) of about 4100 g.m–3. The porous substructu

In this paper the multistage membrane pertraction (simultaneous extraction and reextraction) of phenol with linear monoalkyl cyclohexane (lMACH) as a carrier and sodium hydroxide solution as a strip, in laboratory scaled pertractors with polysulphone hollow-fiber membranes, was investigated. Two typ