Optimization of copper adsorption process from aqueous solution by Descurainia sophia plant stem using Taguchi method

The aim of this project is the production of The Descurainia Sophia adsorbent in nano dimensions using a super-grinding disk mill. The top-down method was used in the process of nanogel preparation. After complete drying of the stems, the stems were reduced to smaller sizes by an electric mill, and by using the available sieve to standard number 60, adsorbent granulation was performed. The adsorbent was used to remove copper from aqueous solution. The tests and their optimization results were based on the design of experiments in three levels of variables using Taguchi method. According to the experiment results, pH, contact time, and adsorption mass are the main factors and the most influential effect on the removal of copper from the aqueous solution is the pH parameter, which has a lower p-value. As the pH increases from 5 to 9, the efficiency of copper metal removal increases. The concentration of hydrogen ions is the most important parameter affecting the adsorption process. The effect of temperature on adsorption efficiency has been investigated in the range of 20-50°C. Finally, the highest efficiency of copper cation removal was at 30°C and 8.89%. The results showed that the pH of the solution had the most effect on the copper removal efficiency and in the playing environment, the effect of copper removal was more than the acid and neutral conditions of the solution. Also, the adsorbent mass and contact time have the most effect on copper removal after the pH parameter in the Taguchi method.

کلیدواژه ها:

Nanogel ، Descurainia sophia Plant Stem ، Design of Experiments (DoE) ، Taguchi method