Optimization of montmorillonite nanoparticles in tin removal from effluent
Subject Areas : The Application of Chemistry in Environment
maryam moghaddas
1
(Department of Chemistry, Safadasht Branch, Islamic Azad University, Tehran, Iran)
Sepideh Kamalzadeh
2
(Department of Chemistry, Safadasht Branch, Islamic Azad University, Tehran, Iran)
Simin Arabi
3
(Department of Chemistry, Safadasht Branch, Islamic Azad University, Tehran, Iran)
Keywords: effluent, Montmorillonite nanoparticles, heavy metal removal,
Abstract :
In this study, the efficiency of montmorillonite nanoparticles to remove tin metal from the effluent was investigated.Raw nanoclay reduced the tin concentration to 88.5 ppm at pH = 5.5, ambient temperature, 0.12 g per 100 ml of 100 ppm solution, 90 minutes contact time for tin. After washing the nanoclay with 0.1 M sulfuric acid and performing adsorption test under the above conditions, the tin concentration decreased to 65 ppm and the tin adsorption capacity by raw and washed nanoclay was 9.6 and 29.7 mg / g, respectively. It was found to be consistent with previous studies. At pH, the concentration of tin metal by HQ-modified nanoclay decreased from 100 ppm to 59.4 ppm and by SDS-modified nanoclay to 56.63 ppm, and the adsorption capacity was 33.83 and 36.14 mg / g, respectively. شد. It can be seen that SDS-modified nanoclay has yielded better results for tin metal. Then studies on isotherm, kinetics and thermodynamics of adsorption were performed. In isotherm studies, by holding the amount of adsorbent (0.12 g), contact time, temperature, pH = 5.5 and volume of 100 ml, the values of initial concentrations of metal ions 50, 100 and 200 ppm were investigated.Thermodynamic studies show that by keeping parameters such as initial concentration, pH, contact time, adsorbent amount and solution volume in optimal conditions at 298, 313 and 333 K, increasing the temperature increases the adsorption capacity, which indicates that the reaction is calorific.
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