MODEL KINETIKA LANGMUIR UNTUK ADSORPSI TIMBAL PADA ABU SEKAM PADI

Bregas S T Sembodo

Abstract

One of the methods to overcome lead pollution in water is an adsorption process. Rice hull would turn to ash and was used as an alternative adsorbent for lead adsorption. The objective of this research was to examine the kinetics of lead adsorption onto rice hull ash. The examined variables were the temperature and the weight of adsorbent. The batch sorption experiments were carried out in the 1 liters stirred glass vessel contained 5 ppm Pb(NO3)2 solution. The weights of rice hull ash introduced into the vessel were 1 g, 5 g, 8 g and 15 g. The temperatures of solution were 35oC, 45oC and 55oC. The solution samples were taken every 10 minutes until reaching equilibrium and analyzed for the remaining Pb2+ by AAS. The results showed that the increase in temperature reduced the rate of lead adsorption and the increase in weight of adsorbent accelerated the lead adsorption. It was also found that the Langmuir kinetics model adequately describes the variation in the adsorption observed in these experiments.

Full Text:

PDF

References

Bathia, S., Liu, F., and Arvind, G., 2000, “Effect of Pore Blockage on Adsorption Isotherm and Dynamics: Anomalous Adsorption of Iodine on Activated Carbon”, Langmuir, 16, pp.4001-4008

Chang, Y.Y., Lin, C.I., and Chen, H.K., 2001, “Effect of Acid Activation on Sesame Oil Bleaching by Rice Hull Ash”, J. Chem. Eng. Japan, 34, pp. 1-6

Chen, C.Y., Lin, C.I., and Chen, H.K., 2003, “Kinetics of Adsorption of βCarotene from Soy Oil with Activated Rice Hull Ash”, J. Chem. Eng. Japan, 36, pp. 265-270

Do, D., 1998, “Adsorption Analysis: Equilibria and Kinetics”, Imperial College Press, London Do, D. and Wang, K., 1998, “Dual Diffusion and Finite Mass Exchange Model for Adsorption

Kinetics in Activated Carbon”, AIChE Journal, 44, pp. 68-82

Liew, K.Y., Yee, A.H., and Nordin, M.R., 1993, “Adsorption of Carotene from Palm Oil by Acid-Treated Rice Hull Ash”, J. Am. Oil. Chem. Soc., 70, pp. 539-541

Lin, S.H., Lin, C.I., and Chen, H.K., 2001, “Sesame Oil Bleacing with Activated Rice Hull Ash”, J. Chem. Eng., Japan, 34, pp. 737-742

Morgan, D.A., Shaw, D.B., Sidebottom, M.J., Soon, T.C., and Taylor, R.S., 1985, “The Function of Bleaching Earths in the Processing of Palm, Palm Kernel and Coconut Oil”, J. Am. Oil. Chem. Soc., 62, pp. 292299

Proctor, A., 1990, “X-ray Diffraction and Scanning Electron Microscope Studies of Processed Rice Hull Silica”, J. Am. Oil. Chem. Soc., 67, pp. 576-584

Proctor, A. and Palaniappan, S., 1989, “Soy Oil Lutein Adsorption by Rice Hull Ash”, J. Am. Oil. Chem. Soc., 66, pp. 1618-1621

Proctor, A., Clark, P.K., and Parker, C.A., 1995, “Rice Hull Ash Adsorbent Performance under Commercial Soy Oil Bleaching Conditions”, J. Am. Oil. Chem. Soc., 72, pp. 459-462

Sembodo, B.S.T, 2005, “Isoterm Kesetimbangan Adsorpsi Timbal pada Abu Sekam Padi”, Ekuilibrium, 4, hal. 100-105

DOI: https://doi.org/10.20961/ekuilibrium.v5i1.49587

Refbacks

  • There are currently no refbacks.