Modified Pine Cone for Dye Pollutants Removal from Aqueous solution

  • Confidence B Zulu Tshwane University of Technology
  • Maurice S M. S. Onyango Tshwane University of Technology
  • Jianwei Ren
  • Taile Y Lwesifi Tshwane University of Technology


Water pollution associated with discharge of dye effluents into  the natural water resources is a major issue because of the adverse effects on human health and the ecosystem. During the past decade,  the use of agricultural by -products as potential adsorbents in environmental remediation has received much attention due to their availability and exceptional properties. In this study, the ability of polyaniline (PANI) coated pine cone as a low-cost adsorbent on the removal of direct orange 26 (DO 26) dye from wastewater was investigated. The physicochemical properties of the adsorbent were studied using various characterization techniques such as Fourier transform infrared (FTIR), Scanning electron microscopy (SEM), X-ray diffraction (XRD) and Brunauer Emmett teller (BET). Batch equilibrium and kinetics adsorption experiments were performed to determine the efficiency of the adsorbents on dye removal and to establish the effect of various operational parameters on the adsorption process. Results showed that the removal of DO 26 dye occurs through the surface of the adsorbent this was confirmed by characterization. It was observed that percentage dye removal decrease with increasing solution pH.  The results also indicate that adsorption efficiency increased with increase in temperature which predicts that the adsorption process is endothermic. Maximum percentage dye removal was found to be 99.98% at pH 4.17, adsorbent dosage 0.1g and initial dye concentration 50 mg/L. Kinetic studies revealed that equilibrium was reached within 90, 180 and 240 min of interaction for initial dye concentrations of 50 mg/L, 100 mg/L and 150 mg/L respectively. It can be concluded that PANI coated on pine cones can be used as an effective adsorbent for removal of dye from aqueous solutions.
Sep 25, 2017
How to Cite
ZULU, Confidence B et al. Modified Pine Cone for Dye Pollutants Removal from Aqueous solution. Proceedings of Sustainable Research and Innovation Conference, [S.l.], p. 23-29, sep. 2017. ISSN 2079-6226. Available at: <>. Date accessed: 24 feb. 2018.