Investigation of the adsorption capacity of Cr 3+ , Ni 2+ , Cu 2+ , Zn 2+ by modified sugarcane bagasse and treatment environment testing

Abstract

This study has successfully made adsorption material from sugarcane bagasse with sulphuric acid. The obtained adsorption material were characterized by techniques including SEM and IR. The analytical results confirmed that porous structure of adsorption material is higher than sugarcane bagasse. Result of study adsorption ability Cr3+, Ni2+, Cu2+, Zn2+ in water solution of adsorption material indicate: + The interval pH optimum for the best adsorption was: 4 with Cr3+ and Zn2+; 5 ÷ 6 with Ni2+; 4÷ 5 with Cu2+ . + The result of experiments indicate that the capability of adsorption material is much better than material. + The time to reach equilibrium adsorption was 40 min with Cr3+ and Zn2+; 50 min with Ni2+ and Cu2+ . + When the amount of adsorption material increases, the capacity adsorption for Cr3+, Ni2+, Cu2+, Zn2+increases. + When the first concentration of metal ions increases, the adsorption capacity of the adsorption material increases. + The adsorption data were studyed by using the Langmuir model. Results of studies, show that the amount of cation adsorbed per unit mass adsorption material was 70,922 mg/g with Cr3+ ; 48,544 mg/g with Ni2+ ; 49,505 mg/g with Cu2+ and 64,935 mg/g with Zn2+ . (4). Adsorption material is used to adsorption Zn2+in wastewater treatment of plating factory. Results show that the concentration of Zn2+ after twice adsorption reduces bellow permitted level of QCVN 24:2009/BTNMT