This study was aimed to possibility of applying three constructed wetlands units (based on the vertical subsurface flow mode-operation) for treating of simulated wastewater contained cadmium ions. Iraqi sand was the substrate used for packing of mentioned units; however. Canna indica and Typha domingensis can be planted in any two units to improve of cadmium removal while the last one... https://cuttingedgecutleryco.shop/product-category/letter-opener/