Removal of phosphate ions and Pb (II) from synthetic water matrices using “green” synthesized zero valent iron
Published under CEST2021
Proceedings ISBN: 978-618-86292-1-9
Proceedings ISSN: 2944-9820
In this paper, phosphates and lead were chosen as the priority pollutant, because their increased concentrations in water can be caused by the release of various untreated effluents and thus can cause serious damage to the environment. Nano zero valent iron synthesized by leaves, In addition to being considered an environmentally friendly method, it is a stable and efficient material. The influence of process conditions was examined by applying a statistical model of the new generation - definitive screening design, which played a significant role in the optimization of the entire experiment. The influence of 4 process parameters on the efficiency of lead removal was examined: initial phosphate concentration (from 1 mgL-1 to 9 mgL-1) initial lead concentration (from 1 mgL-1 to 9 mgL-1), dose of nZVI (from 2 mL to 16 mL) and pH value (from 2 to 10). Under optimal conditions, the dose of nZVI 9 mL, 8.76 mgL-1, phosphate concentration 2 mgL-1and pH value 3 the removal efficiency is 99.41%. Based on the verification and confidence interval, the adopted model was found to be appropriate and to describe well the process of removing phosphate in the presence of lead from the synthetic aqueous matrix.
oak-nZVI, Lead, Phosphorus, statistical model