Modeling of Cadmium Removal from Domestic Wastewater in Constructed Wetlands Using STELLA Simulation Program

A mathematical model was developed to simulate cadmium removal from wastewater in free water surface (FWS) and subsurface flow (SF) constructed wetlands using STELLA simulation program. The model simulated the accumulation of cadmium in soil (Cds), uptake by plants (Cdp), and residual concentration in effluent (Cdww_eff). The model was calibrated using one-half of the experimental data for the adjustment of the coefficients and the remaining data for model verification. The comparison of simulated and experimental values of Cds, Cdp, and Cdww_eff showed good agreement. The results indicated that the developed mathematical model could be useful for predicting the fate of cadmium when treating domestic effluents in constructed wetlands.

[1]  W. Lung,et al.  Modelling copper removal in wetland ecosystems , 1996 .

[2]  N. Ladegaard,et al.  Waste stabilization ponds and constructed wetlands: design manual , 2004 .

[3]  J. Wainwright,et al.  Environmental Modelling: Finding Simplicity in Complexity , 2013 .

[4]  R. Jindal,et al.  Cadmium Removal from Wastewater in Constructed Wetlands , 2005 .

[5]  M. Elektorowicz,et al.  Fuzzy modeling estimation of mercury removal by wetland components , 2004, IEEE Annual Meeting of the Fuzzy Information, 2004. Processing NAFIPS '04..

[6]  N. Suñé,et al.  Nutrient and metal removal in a constructed wetland for wastewater treatment from a metallurgic industry , 2006 .

[7]  Michael L. Shelley,et al.  A dynamic model of bioavailability of metals in constructed wetland sediments , 1999 .

[8]  Jianguo Liu,et al.  Accumulation of Cd, Pb and Zn by 19 wetland plant species in constructed wetland. , 2007, Journal of hazardous materials.

[9]  P Pimpan,et al.  Mathematical modeling of cadmium removal in free water surface constructed wetlands. , 2009, Journal of hazardous materials.

[10]  LorettaY Li,et al.  Phytoremediation Technology: Hyper-accumulation Metals in Plants , 2007 .

[11]  D. Walker.  Modelling sedimentation processes in a constructed stormwater wetland. , 2001, The Science of the total environment.

[12]  O. Stein,et al.  Plant species and temperature effects on the k–C* first-order model for COD removal in batch-loaded SSF wetlands , 2006 .

[13]  Shafiqur Rehman,et al.  Use of constructed wetland for the removal of heavy metals from industrial wastewater. , 2009, Journal of environmental management.