Research Abstracts

A number of resins have been synthesized by reacting 2,2’-dihydroxybiphenyl with urea and formaldehyde in presence of 2M HCl as catalyst, proved to be selective chelating ion-exchange resins for certain metals. Chelation ion-exchange properties of these terpolymer were studied for Fe3+, Cu2+, Ni2+,

A laboratory study was carried out to explore the effect of solution hydrodynamics on the deposition of calcium carbonate scale on Stainless Steel 316 and calcium sulfate scale on aluminum substrates using a rotating cylinder electrode apparatus. The results of the study indicate a strong influence

Nowadays, more than 110 cities of China confront the serious problem of fresh water shortage, and more than 70% of the rivers and lakes are contaminated to some extent. About 38 million people are depending on brackish water for life. Desalination of seawater and brackish water is one of the ways to

A small-scale photovoltaic (PV) powered reverse osmosis (RO) plant is designed to operate at variable flow/ pressure conditions for stand-alone applications in equatorial areas to desalinate brackish water. Two operation strategies for a PV array of 165 Wp (3 modules of 55 Wp) are simulated and comp

The adsorption kinetics of surfactants onto the crystal surface spin-coated with a thin layer of a model membrane material, polyethersulfone was monitored through measurements of frequency and dissipation shifts simultaneously using a quartz crystal microbalance with dissipation (QCM-D) apparatus. I

A new polyvinyl chloride (PVC) membrane electrode that is highly selective to Fe(II) ions was prepared using N-phenylaza-15-crown-5 (NPA15C5) as a suitable neutral carrier. The sensor exhibits a Nernstian response for Fe(II) ions over a wide concentration range (1.0 Â 10À2 to 1.0 Â 10À6 M) with a sl

In this paper, montmorillonite–Cu(II)/Fe(III) oxides magnetic material was prepared and used for removal of harmful algae from water. The material was prepared by the supporting of Cu(II)/Fe(III) oxides on pillared montmorillonite and was characterized by XRD, zeta potential measurements. The result

Separation efficiency of ceramic NF membranes manufactured by Tami Industries (Nyons, France) is investigated for the separation of aqueous solutions containing strong inorganic electrolytes. The membrane used is multi-layer structured with a mixed titania and zirconia selective layer (1000 Da MWCO)

In this paper the enzymatic manufacture of glycerol monostearate was studied in high polar organic solvents. Water produced during the reaction has a disadvantageous effect on the reaction rate and enzyme activity. This byproduct water was removed and the water content was kept constant using a perv

A new membrane fractionation process based on the combination of hybrid membrane cells and differential diffusion of two solutes was studied by numerical methods. The hybrid membrane cell comprises semipermeable and fully-permeable membrane sub-sections. While the semi-permeable membranes are permea