Abstract
Wastewater treatment is very important in regards to environmental and water security. The removal of iron complexed with other organic and inorganic compounds from wastewater solutions is difficult due to it has high solubility in aqueous substances. NTMP: Nitrilotrimethylenetris (phosphonic acid) has been utilized as a chelating agent for iron ions removal from wastewater produced from phosphate fertilizers industry. The main variables such as mixing time, NTMP concentration, NTMP/ waste solution ratio, and temperature have been investigated. The obtained results declare that NTMP concentration and NTMP/ waste ratio are positively impact the removal process, however, reaction temperature affect negatively on the removal efficiency. Design of experiment methodology has been applied to optimize the iron ions removal process. The displayed data show that about 99.4 of iron ions could be removed successfully from wastewater solution based on the following optimum conditions; NTMP concentration of 0.9 M; NTMP/ waste ratio, mL/ mL, of 0.01; reaction time of 15 min and room temperature.