El Qada, E., Mu’tah Lil-Buhuth wad-Dirasat: Natural and Applied Sciences Series,  2020,

This work has been undertaken to cover design aspects of a single-stage batch adsorber and fixed-bed adsorber for the removal of malachite green (MG) dye using diatomite ores. The single stage batch adsorber was designed for different adsorbent mass/treated effluent volume ratios using the Freundlich isotherm. The effects of column operating conditions such as flow rate and initial dye concentration on the characteristics MTZ were investigated. Furthermore, the Empty Bed Residence Time (EBRT) has been applied to the experimental data to optimize the operating conditions of the adsorption system. It was found that a higher amount of diatomite is required to treat a higher concentration of MG solution.  Approximately, the required amount of diatomite was increased by 64% when the initial concentration of MG solution increased from 50 to 300 g/m3. Results of column studies reflected the significance of the experimental parameters on the efficient removal of MG from aqueous solution. Increasing bed depth and decreasing flow rate and initial MG concentration enhance the efficiency of the adsorption column.