Thermodynamic Effect on Boron Removal from Aqueous Solutions by MgAl Layered Double Hydrotalcite

Boron is an element of requirement for the growth of plants, animals and humans. Though environmental issues and health hazards are related to its applications in various industries; such as plants' growth retardation and the effect on humans' nerve system. In this research adsorption capabilities of Mg-Al Layered Double Hydrotalcite (LDH) on boron were tested to remove it from aqueous solutions. Experiments were conducted with variety of temperatures, and initial boron concentration; thus finding the most optimum factors and conditions. Results showed that with high temperatures faster removing rate of the contaminant from aqueous solutions was achieved. Moreover, thermodynamic analysis depicted that the adsorption process of boron on Mg-Al LDH is endothermic and involves both physisorption and chemisorption.