Biosorption of Hg(II) ions, Congo red and their binary mixture using raw and chemically activated mango leaves
This study reports the investigation performed by comparing the ability of raw and treated mango leaves powder (with potassium persulphate, K2S2O8) to adsorb Hg2+, Congo red dye and their binary mixture from their aqueous solutions through batch experiments. Both adsorbents were characterized by Fourier-transform infrared spectroscopy to reveal the active sites of both adsorbent. The experimental parameters such as pH, contact time, adsorbent dosage, initial concentration and temperature were investigated. The maximum removal of Hg2+, Congo red and binary mixture obtained were 42.86%, 54.72% and 62.5% using raw mango leaves powder and 64.29%, 81.25% and 63.82% using treated mango leaves respectively at pH 7. The experimental data better fit the Langmuir isotherm model for binary mixture adsorption on both adsorbent, the Freundlich isotherm model for Congo red dye adsorption on raw adsorbent and Hg2+ adsorption on both adsorbents, the Brunauer–Emmett–Teller isotherm model for Congo red adsorption onto the treated adsorbent. Kinetic data were best fit to a pseudo-second-order rate equation except the adsorption of Congo red onto untreated adsorbent that supported pseudo-first-order rate equation. Thermodynamic parameters shows that adsorption of binary mixture onto treated adsorbent and Hg2+ adsorption on both adsorbents were spontaneous and endothermic in nature while adsorption of binary mixture onto untreated adsorbent and Congo red adsorption on both adsorbents were non-spontaneous and endothermic in nature between temperatures of 30 and 60 °C. This study revealed a great potential of raw and treated mango leaves in the effective removal of Hg2+, Congo red and their binary mixture from waste water.
KeywordsRaw mango leaves powder Treated mango leaves powder Hg2+ adsorption Congo red adsorption Binary mixture adsorption Experimental parameters Thermodynamic parameters
- Abdel-Ghani, N. T., & Ghadir, A. E. (2014). Biosorption for metal ions removal from aqueous solutions: A review of recent studies. International Journal of Latest Research in Science and Technology, 3(1), 24–42.Google Scholar
- Freundlich, H. M. F. (1906). Over the adsorption in solution. Zeitschrift für Physikalische Chemie, 57, 385–470.Google Scholar
- Jyoti, S., & Beena, J. (2008). A study on removal of Congo red dye from the effluents of textile industry using rice husk carbon activated by steam. Rasayan Journal of Chemistry, 1(4), 936–942.Google Scholar
- Pathania, D., & Singh, P. (2017). Removal of methylene blue by adsorption onto activated carbon developed from Ficus Carica bast. Arabian Journal of Chemistry, 10(1), 51445–51451.Google Scholar
- Periasamy, A., Muruganand, S., & Palaniswamy, M. (2009). Vibrational studies of Na2SO4, K2SO4 and KHSO4 crystals. Rasayan Journal of Chemistry, 2(4), 981–989.Google Scholar
- Sharma, J., & Janveja, B. (2008). A study on removal of Congo red dye from the effluents of textile industry using rice husk carbon activated by steam. Rasayan Journal of Chemistry, 1(4), 936–942.Google Scholar
- Sharma, N., & Nnadi, B. K. (2013). Utilization of sugarcane bagasse, an agricultural waste to remove malachite 5 dye from aqueous solution. Journal of Materials and Environmental Science, 4(6), 1052–1065.Google Scholar
- Sheen, O. (2011). Utilization of mango leaf as low-cost adsorbent for the removal of Cu(II) ion from aqueous solution. BSc Thesis, Universiti Tunkun Abdul Rahman, Malaysia.Google Scholar
- Tabrez, A. K., Sangeeta, S., & Imran, A. (2011). Adsorption of Rhodamine B dye from aqueous solution onto acid activated mango (Magnifera indica) leaf powder: Equilibrium, kinetic and thermodynamic studies. Journal of Toxicology and Environmental Health Sciences, 3(10), 286–297.Google Scholar
- Taha, A. A., Moustafa, A. H. E., Abdel-Rahman, H. H., & Abd El-Hameed, M. M. A. (2017). Comparative biosorption study of Hg (II) using raw and chemically activated almond shell. Adsorption Science & Technology, 36(1–2), 1–28.Google Scholar
- Thomas, S. B. (2016). Removal of Cationic Dyes and Heavy metals from water using low cost Adsorbents. Resource document. University Grant Commission. http://www.baselius.ac.in/wp-content/uploads/2017/06/MRP-Dr-Suma-Bino-Thomas.pdf. Accessed 11 February 2019.
- Xue, Y., Gao, B., Yao, Y., Inyang, M., Zhang, M., Zimmerman, A. R., et al. (2012). Hydrogen peroxide modification enhances the ability of biochar (hydrochar) produced from hydrothermal carbonization of peanut hull to remove aqueous heavy metals: Batch and column tests. Chemical Engineering Journal, 200–202, 673–680.CrossRefGoogle Scholar