Author/Authors :
Mirbaloochzehi ، Mohammad Reza Department of Chemistry - Faculty of Science - University of Sistan and Balouchestan , Rezvani ، Alireza Department of Chemistry - Faculty of Science - University of Sistan and Balouchestan , Samimi ، Abdolreza Department of Chemical Engineering - Faculty of Engineering - University of Sistan and Balouchestan , Shayesteh ، Masoud Department of Chemical Engineering - Faculty of Engineering - University of Sistan and Balouchestan
Abstract :
This work, the application of a surfactant-modified natural nano-clinoptilolite for the removal of several two valances heavy metal cations (i.e., Cu^2+, Pb^2+, Ni^2+, Cd^2+, Fe^2+ and Zn^2+) from aqueous media was discussed. Triton X-100 was used as modifier and to achieve maximum efficiency of adsorption; variables such as the concentration of surfactant, contact time, the working temperature and pH of sample solution were optimized. The results revealed that, the maximum adsorption was achieved at a solution with the pH of 6, containing 2 mL of triton X-100 and 2 g/L of clinoptilolite at 45 °C. The obtained selectivity series for the adsorption of cations were Pb^2+ Cu^2+ Cd^2+ Ni^2+ Zn^2+ Fe^2+. The maximum adsorption capacity of the modified zeolite for Pb^2+, Cu^2+, Cd^2+, Ni^2+, Zn^2+ and Fe^2+ was 91.34, 85.71, 78.27, 76.18, 67.41 and 63.45 mg/g, respectively. The adsorption data were acceptably fitted to the both Freundlich and Langmuir isotherms.
Keywords :
Heavy metal removal , Nano water treatment , clinoptilolite , Surfactant
