Abstract
The adsorption of chromium (VI) from aqueous solution was carried out using natural clay from western area in Saudi Arabia. The adsorbents used are characterized by X-ray diffraction (XRD) and other physico-chemical techniques. The various parameters affecting the adsorption process were investigated involving effect of initial concentration of Cr (VI) ion, temperature factor, dosage of adsorbent, pH of the solution, contact time and rotational per minute (RPM). Optimum conditions for adsorption process were; 50 mg/L -1 initial concentration of Cr(VI), adsorbent dose =1g, temperature ~ 25 o C, 3 hours contact time and pH=2, the obtained results were used to calculate the adsorption efficiency. Removal of chromium ion was found as highly depends on pH and initial Cr (VI) concentration of the solution. Langmuir isotherm was applied to get a maximum adsorption capacity of 18.68 mg/g. Although experimental data confirm with Langmuir isotherm model. The results of this study confirm that the material can be considered as effective adsorbents for the removal of chromium (VI).
Highlights
The major problem for the researchers that related to our environment is the pollution whatever its kind, the disposal of the metal ions which becoming a harmful and causing a sever problems
1g of natural clay was added shaken at 200 rotational per minute (RPM) for three hours
The solution was analyzed for chromium (VI) ions concentration after 24 hours
Summary
The major problem for the researchers that related to our environment is the pollution whatever its kind, the disposal of the metal ions which becoming a harmful and causing a sever problems. Some of these metal ions are essential to our living but an increase in their quantities make trouble and affecting the resources. Chromium (VI) causing a cancer to human by eating or breathing [2] It can be deposited in soil and compounded with other particles resulting in different oxidizing states [3]. This study will focus on the adsorption of chromium (VI) from aqueous solution using natural clay collected from Khullais area in Kingdom of Saudi Arabia
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