Adsorption of Bromo Phenol Red Dye from Aqueous Solution by Iraqi Bentonite Clay

Abstract

This studies deals with investigated the potential of a Iraqi bentonite clay for the adsorption of bromo phenol red dye from contaminated water. Impulse adsorption experiments were performed. The contact time influence of initial dye concentration, temperature, pH, ionic strength, partical size adsorbent and adsorbent dosage on bromo phenol red adsorption are investigated in a series of batch adsorption experiments. Adsorption equilibrium data were analyzed and described by the Freundlich, Langmuir and temkin isotherms equations. Thermodynamic parameters inclusive the Gibbs free energy (∆G•), enthalpy (∆H•), and entropy (∆S•), were also calculated. These parameters specified that adsorption of bromo phenol red onto bentonite was functional, more spontaneous and endothermic with increase of temperatures from 298.15 to 313.15 K.

Adsorption of Azo Dye Onto TiO2 Nanoparticles Prepared by a Novel Green Method: Isotherm and Thermodynamic Study

“…Adsorption refers to a solid's capacity to accumulate other substances from solution on its surfaces. Many materials have been employed as adsorbents for decolorizing industrial wastewater, including raw with activated illite mixed, chlorite and kaolinite [10], modified bentonite [11] and Thuja plant [12]. TiO2 nanomaterials are now regarded as a promising material that is heavily involved in getting rid of toxic organic containments through the adsorption and photo-catalytic process due to the stability of its structure, bio-compatibility, strong oxidizing agent, [13] and non-toxicity of the metal precursors [14][15][16][17][18][19].…”