Removal Efficiency of Cd+2 and Pb+2 using Polyurea Based on Bis-dithiocarbamte Ligand

Abstract

Currently, there is a growing concern and focus on heavy metals due to their detrimental impact on human health, making them one of the most critical environmental issues. To protect humans and the environment, such hazardous heavy metals do not dissolve easily and require removal from contaminated water. This research was aimed at preparing three types of novel polyurea containing bis-dithiocarbamte ligands and using them as chelators to extract cadmium and lead ion from contaminated water. Dithiocarbamates were chosen due to they have strong binding capabilities and can form insoluble stable colored metal ions complexes in water, which make them superior ligands for the removal of heavy metals from polluted water. Generally, these adsorbents exhibit high adsorption capacity, but limitations such as high operational costs, low recyclability and the introduction of a large volume of additional contaminants, have also been found. Therefore, we have been carried out develop more efficient, environmental friendly, and inexpensive adsorbents followed by a mechanical separation process, provides one promising solution. The efficiency of metal removal between them is compared and shows that these resins have an excellent ability to give insoluble heavy metal polymers, their efficiency has been studied with different times at a different pH. Activity to the lead ion indicates that (pH=3: H, P > E; pH=5: H, E > P) while behavior to the cadmium ion at all pH values 4, 6 and 8 was: E, P > H.