Research on Adsorption of Pb²⁺ on to Microspheres Prepared by Rectorite and Humic Acid

Abstract:

Rectorite (REC), humic acid (HA) and polyvinyl alcohol (PVA) were used to prepare microspheres. Batch adsorption experiments of Pb²⁺ ion on to the microspheres were performed. The results obtained indicate that adsorption time, the microspheres dosage and temperature were the main factors influencing the adsorptive capacities. The adsorption data for Pb²⁺ ion were well described by the Freundlich, Langmuir and Temkin models. The kinetic experimental data properly correlated with the pseudo-first-order model, pseudo-second-order model and Elovich equation. The adsorption process is spontaneous, endothermic and out-of-order. The whole adsorption process is mainly controlled by entropies. The adsorption can be classified as chemical adsorption. The mechanisms for the adsorption of Pb²⁺ ion on to the microspheres involved ion-exchange adsorption of Pb²⁺ or the formation of complex compound. Under the experimental conditions employed, the removal of Pb²⁺ ion attained value of 96.05%.

• Periodical: Advanced Materials Research (Volumes 233-235)
• Pages: 1972-1980
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.233-235.1972
• Online since: May 2011
• Authors: Yu Bin Tang, Fang Yu, Fang Yan Chen, Cheng Chen
• Keywords: Adsorption, IR, Kinetic, Pb²⁺, Rectorite/Humic Acid Microspheres, Thermodynamic

References

[1] M. P. Zhao and M. Shao: Environmental Chemistry (Peking University Press, Beijing 2005). (In Chinese)

[2] E. Pehlivan, B. H.Yanik, G. Ahmetli, M. Pehlivan: Bioresource Technology Vol. 99, Issue 9(2008), p.3520

[3] O. J. Karnitz, L. V. Gurgel, J. C. de Melo, V. R. Botaro, T. M. Melo, R. P. de Freitas Gil and L. F. Gil: Bioresource Technology Vol. 98, Issue 6(2007), p.1291

DOI: 10.1016/j.biortech.2006.05.013

[4] R. P. Han, J. H. Zhang, W. H. Zhou, J. Shi and H. M. Liu: Journal of Hazardous Materials Vol. 125, Issue 1-3(2005), p.266

[5] C. He, Z. Li, Z. X. Zhao and H. X: Ion exchange and adsorption Vol. 22, Issue 6(2006), p.481(In Chinese)

[6] M.Yin, S. H. He, Z. Y.Hu, H. M. Fan, Z. P. Gu, Y. Zhou: Water Science and Engineering Technology Issue 1 (2008), p.43(In Chinese)

[7] X. Zhan, D. Y. Liu, K. N. Zhong and H. S. Cai: Environmental Science and Technology Vol. 28, Issue 4 (2005), p.16 (in Chinese)

[8] J. Lu, K. Zhu, B. Hou and Y. F. Zhao: Humic acid, Issue 5 (2006), p.1(In Chinese)

[9] L. J. Zhu, J. C. Zhang, D. X. Zai, J. Jiang and X. Wang: Journal of Nanjing Forestry University (Natural science edition) Vol. 31, Issue 4 (2007), p.73(In Chinese)

[10] H. Y. Qin: Copper Enginnering Issue 1 (2007), p.59(In Chinese)

[11] Y. Chen, L.Yan, L. Z. Guan, C. Wang, X. Dong and X. D. Zhang: Chinese Journal of Soil Science Vol. 37, Issue 3 (2006), p.479(In Chinese)

[12] Y. B. Tang, H. Lu, F. Y. Chen, Y. Y. Bu and R. Q. Lu: Environmental Science and Technology Vol. 31, Issue 11 (2008), p.13 (in Chiinese)

[13] S. Ahmet and T. Mustafa: Journal of Hazardous Materials Vol. 152, Issue 1 (2008), p.302

[14] Y. B. Tang, F. Y. Chen and Y. F. Zhang: Water Pollution Control (Press of Harbin Institute of Technology, Harbin 2006) (In Chinese)

[15] E. Saliha and M. Emine: Applied Surface Science Vol. 253, Issue 10 (2007), p.4727

[16] Q. Li, Q. Y.Yue, B. Y. Gao and L. L .Liu: Chemical Journal of Chinese Universities Vol. 27, Issue 6 (2006), p.1113(In Chinese)

[17] Ö. Yunus: Journal of Hazardous Materials Vol.137, Issue 3 ( 2006), p.1719

[18] Y. Hu, X. R. Chen and S. S. Wu: Physical Chemistry (China Higher Education Press, Beijing 1999). (In Chinese)

[19] A. Günay, E. Arslankaya and I. Tosun: Journal of Hazardous Materials Vol.146, Issue 1-2 (2007), p.362

[20] S. H. Chien and W. R. Clayton: Soil Science Society of America Journal Vol. 44(1980), p.265