Heavy metal ions

This paper describes the interaction and removal of some heavy metal ions such as Ni(II) and Cu(II) from aqueous solution at constant pH (6.0) and 0.01 M NaClO4 ionic strength using raw clay mineral. The experimental results were analysed in terms of Langmuir, Freundlich and Redlich–Peterson isother

Economical progress and increase in population result in an increase of sewage and wastewaters containing heavy metal ions. The ion exchange method is applied for removal of toxic metal ions and organic pollutants from drinking, underground and surface waters and also from industrial wasterwaters pr

Conventional precipitation methods of industrial sewage and wastewater purification are not very effective and are insufficient in many cases. This implies the necessity of searching new, effective methods exploiting cheap, accessible and ecologically safe ion exchangers and sorbents. The paper pres

In this study, experiments were carried out to estimate sorptivity of chitosan beads and their selectivity towards Cu2+ (copper sulfate), Zn2+ (zinc sulfate) and Cr6+ (potassium dichromate) ions. Studies were performed in the concentration range from 20 to 500 mg/dm3 for single ions and their binary

The work presented in this paper deals with the investigations on the effect of heavy metal ions, e.g., Cu and Ni, on the localized corrosion behavior of carbon steel and SS 316L under different experimental conditions. The important experimental conditions which include the nature of aqueous medium

A process for purifying wastewaters containing heavy and toxic metals such as cadmium and zinc by the complexation–filtration process was studied. From previous research, diethylaminoethyl cellulose (DEAE23) was selected as the complexing agent. The experiments were carried out in a Millipore ultraf

In this paper the pilot tests of a recycling process for removing lead form nitric acid solutions have been presented. At first batch tests were performed. Permeate yields up to 80% could be achieved in these tests. Corresponding to these yields the lead concentrations rose up to 70 g/l. Due to the

Fibrous ion exchangers (FIBAN) have been studied in a model process of water softening and removal from water simultaneously present heavy metal ions: Co2+, Ni2+, Zn2+, Cd2+, Cu2+, Pb2+. The effect of the following factors on the efficiency of Ca2+ removal from a model solution has been studied: the