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The effect of the adsorption process on electrical conductivity, equivalent conductivity, ionization constant and dissociation degree was studied to Di hydroxy benzoic acid with different concentrations by using natural surfaces (Hazelnut peel and walnut peel ). The results refers to decrease electrical conductivity after acid adsorption on both surfaces. The effect of acid concentration on the degree of disintegration and the ionization constant was also studied.

A photocatalyst aluminum oxide Al2O3 Nanoparticles was effectively prepared by electrochemical method using electrolysis cell which contains stainless steel (1cm 2) and aluminium plate (1cm2) were worked as a cathode and anode electrodes respectively. The synthesized Al2O3 Nanoparticles sample was identified by Fourier transform infrared (FTIR), X-ray diffraction (XRD), and Field Emission Scanning Electron Microscope (FE-SEM) with (EDS) analysis. The XRD pattern specified that prepared Al2O3 sample had a crystal structure for γ-Al2O3with average crystal size (3nm) was achieved at (1000°C) calcination temperature. FTIR spectra indicated the existence of O–Al–O bonds vibration and hydroxyl group in the sample. The FESEM images gave morpholgy of Al2O3 nanoparticles powder after calcination to 1000°C was spherical shape and the particles were attached to each other, leading to an increase in particle size.  The EDS measurements indicated the presence of Al with O peaks. The experimental results of the Al2O3 photocatalyst calcined at 1000°C for two hours showed photocatalytic efficiency to degradation Chromotrope -E122 dye under UV light.

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