The Use of New Chemically Modified Cellulose for Heavy Metal Ion Adsorption and Antimicrobial Activities

R. Saravanan¹, L. Ravikumar^2*

¹KPR Institute of Engineering and Technology, Research and Development Centre, Bharathiar University, Coimbatore, India.
²Department of Chemistry, C. B. M. College (Affiliated to Bharathiar University), Coimbatore, India.

DOI: 10.4236/jwarp.2015.76042                

Abstract

A novel chemically modified cellulose (DTD) adsorbent bearing pendent methyl benzalaniline chelating group was synthesized. This new adsorbent was used for the removal of Cu²⁺ and Pb²⁺ heavy metal ions from aqueous solution. The chemical and structural characteristics of the adsorbent were determined using FT-IR, ¹³C CP-MAS NMR, SEM, EDX and TGA analysis. The adsorption parameters, such as pH, adsorbent dose, contact time, initial metal ion concentration and temperature were optimized. Adsorption kinetic parameters were fitted into pseudo-first-order and pseudo-second-order models. The kinetic data fitted well to the pseudo-second-order kinetic model. The adsorption isotherms such as Freundlich and Langmuir isotherms have been investigated. Thermodynamic parameters have also been evaluated. The negative values of △G⁰ and △H⁰ reveal that the adsorption system is spontaneous and exothermic in nature. The modified cellulose was challenged with microorganisms as a function of contact time. The biocidal results showed that the chemically modified cellulose has bactericidal effect against the bacterial species.

Keywords

Modified Cellulose, Metal Ion Adsorption, Anti-Bacterial Activity

Conflicts of Interest

The authors declare no conflicts of interest.

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