—This study investigates the adsorption characteristics of sawdust for removing nutrients (e.g., NH3-N, NO3-N, and NO2-N) from stormwater. A series of laboratory batch experiments was performed and the effects of different parameters on nutrient adsorption were observed. The parameters of concern include: initial concentration (0.5-5mg/L) and dosage (2-20mg of dry sawdust). Results revealed that the maximum removal was obtained at lower initial concentration. An increase of adsorbent dosage increased the percent removal of NH3-N, NO3-N, and NO2-N. The maximum removal of NO3-N, and NO2-N was found 100%, while NH3-N removal was found 55%. The sorption of sawdust was characterized by Langmuir and Freundlich isotherm and the results show that the correlation coefficient of applicability (R2) of Freundlich model (R2 = 0.8324, 0.9856, and 0.9231 for NH3-N, NO3-N and NO2-N respectively) fits better than Langmuir (R2 = 0.7963, 0.9751, and 0.8049 for NH3-N, NO3-N and NO2-N respectively).
—Adsorption, equilibrium isotherm, nutrients removal, sawdust.
K. D. Harmayani is PhD candidate at Civil Engineering, Curtin University, Western Australia (e-mail: kadekdia@ student.curtin.edu.au).
A. H. M. F. Anwar is Senior lecturer at Civil Engineering, Curtin University, Western Australia (e-mail: F.Anwar@curtin.edu.au).
Cite:K. D. Harmayani and A. H. M. F. Anwar, "Adsorption of Nutrients from Stormwater Using Sawdust," International Journal of Environmental Science and Development vol. 3, no. 2, pp. 114-117, 2012.