Removal of manganese (Mn+2) from aqueous solution by low-cost adsorbents and study the adsorption thermodynamics and kinetics

Abstract

In this research a simple method was used to treat water contaminated by heavy elements containing ions using chicken eggshell powder and to study its adsorption capacity in many laboratory conditions in terms of (time, acidity, heavy metal concentration, weight of the adsorbent material, and temperature) and the diagnosis of the adsorbed substance using Devices for identifying the effective groups on the adsorbent surface used IR ray and its ability to removal the manganese ion as well as studying the thermodynamic adsorption for it ( ?H, ?G, ?S ), And through studying the thermodynamic adsorption process, it is possibility to know the type of exothermic or endothermic, automatic or non-automatic and random or regular, through the data can be controlled by the efficiency and speed of adsorption, The kinetics of the reaction were also studied, the interaction constant was calculated, and the degree of interaction was determined from the first or second order. The best adsorption operators that were used laboratory (time =60 min, pH = 6, Ce = 100 ppm, wight = 0.5 g, temperate =25 C°), IR spectroscopy appear Functional groups (S-H, C-O, O-H, C=C, C=O, N-H, C-N and O=C-O-salt Ca) was (2515.18, 1259.52, 3300 broad, 1635.64, 1799.59, 3300.20, 1419.61 and two strong bond (1600 - 1400)) respectively.