Removal of Pb⁺⁺ in presence of surfactants

Abstract

Purpose

The object of the present work is to study the kinetics of removal of Pb⁺⁺ on zinc rods in the presence and absence of three surface active substances (SAS) at different concentrations of SAS and different temperatures.

Design/methodology/approach

The paper uses a range of recently published (1973‐2003) works, which aim to provide practical and theoretical information about lead, which is a very toxic metal.

Findings

Lead tends to accumulate a sediment, from which it can be released by various processes of remobilization and in many cases it enters the food chain and is concentrated in fish and other edible organisms. The reaction can be considered as taking place via six steps.

Research limitations/implications

The work is a list of recent papers which have been published in different European journals and magazines.

Practical implications

The determination of change of Pb⁺⁺ concentrations was carried out using a Perkin‐Elmer atomic absorption Spectrophotometer.

Originality/value

The rate of PbII/Zn cementation reaction in the presence of surfactants as non‐ionic (Triton‐X‐100), anionic (SDS) and cationic (CTAB) decreased compared with the blank solution (lead nitrate solution). The order of decreasing rate was as follows: Triton‐X‐100 > CTAB > SDS. The rate of cementation was increased by temperature and the value of ΔE* ranged between 27 and 33 kJmol⁻¹, which indicated that the reaction is a diffusion‐controlled process. The presence of two different SAS in the solution is more effective than the presence of one only.

Citation

El‐Batouti, M. (2007), "Removal of Pb⁺⁺ in presence of surfactants", Anti-Corrosion Methods and Materials, Vol. 54 No. 6, pp. 360-366. https://doi.org/10.1108/00035590710833529