Journal of Chemical and Pharmaceutical Research (ISSN : 0975-7384)

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Original Articles: 2016 Vol: 8 Issue: 6

Synthesis, characterization and applications of phenol-formaldehyde cationic matrices blended with sulphonated Citrus aurantifolia(L.) carbon


Phenol-Formaldehyde resin (PFR)is used as a cross linking agent in blending of Sulphonated Citrus aurantifolia Carbon(SCAC).The ion exchangers were prepared by varying the amount of SCAC from 0 to 100%(w/w). The prepared materials (PFR, composites and SCAC) were characterised by FT-IR spectra, SEM and thermal (TGA) studies. The low cost ion exchangers (IERs) is used for the removal of some selective metal ions such as Na+,K+,Ca2+,Cu2+, Mg2+, Zn2+ and Pb2+. The composites are stable in water, organic solvents, and mineral acid like 1M HCl and also in thermal treatment but soluble in some extent in 20%of (w/w) NaOH solution. The rational thermodynamic equilibrium constants (ln Kc) are calculated for Mg2+- H+ and Zn2+- H+ ion exchanges with the composite resins having up to 20% (w/w) blending of PFR with SCAC. The cation exchange capacity (CEC) of the composite was found to decrease with the increasing the %of SCAC in PFR matrix. It was observed that the composites up to 20%(w/w) blending of PFR with SCAC retain all the properties of original PFR. Therefore, the blended composites should be used as low cost ion exchangers when SCAC partially replaces the original PFR up to 20%(w/w) blending without affecting the physico-chemical, thermal, spectral properties and CEC values of PFR.