Adsorptive removal of Ni2+ and Cd2+ by polymethacrylamide and polyvinylamine derivatives from water

作者：Kushwaha Atul Kumar^*; Gupta Neha; Chattopadhyaya M C

来源：Desalination and Water Treatment, 2016, 57(8): 3619-3631.

DOI：10.1080/19443994.2014.986766

• Adsorption
• Nickel
• Cadmium
• Isotherm
• Kinetics
• Thermodynamics

Heavy metals are environmental toxins entering in the food chain through drinking water causing serious health hazards. In the present work, surface of polymethyl methacrylate and polyvinyl chloride was functionalized with amine groups using 1,2-ethylenediamine and characterized by Fourier transform infrared spectroscopy, scanning electron microscopy, and elemental analysis. The resulting polymers polymethacrylamide derivative of 1,2-ethylenediamine (PMAm) and polyvinylamine derivative of 1,2-ethylenediamine (PVAm) were tested for the adsorption of Ni2+ and Cd2+ ions from water. Effect of various physicochemical parameters such as pH, adsorbent dose, contact time, initial Ni2+ and Cd2+ ion concentration, and temperature on adsorption of Ni2+ and Cd2+ ion was investigated. Langmuir and Freundlich isotherm models were used to analyze equilibrium data of adsorption. Monolayer adsorption capacity of PMAm-Ni2+, PMAm-Cd2+, PVAm-Ni2+ and PVAm-Cd2+ systems was found to be 7.87mg/g, 10.57mg/g, 23.92mg/g, and 31.44mg/g, respectively. Kinetic studies were performed using pseudo-first-order, pseudo-second-order kinetic models, and intraparticle diffusion method. The spontaneity and nature of adsorption process were determined by thermodynamic parameters, such as change in Gibb's free energy (triangle G degrees), enthalpy (triangle H degrees), and entropy (triangle S degrees).

• 出版日期2016-2-13