Investigating the effect of the initial concentration of dye on the percentage of dye removal in wastewater treatment containing acid yellow 36

Industrial dyes are among the stable materials that cannot be treated from wastewater by conventional methods and have persistent destructive effects on wastewater and environmental waters. Thus, it is crucial to find a suitable way to remove these materials.  One of these industrial dyes is acid yellow 36. In the current study, the effect of zero-valent iron nano-adsorbent on the removal of this dye was investigated. To carry out this study, 30 experiments were designed using the experiment design software, and different laboratory conditions were applied using the information obtained from this design. Accordingly, the synthetic wastewater in different concentrations of initial dye was prepared and then the effect of nanoparticulate zero-valent iron on the rate of removal of this substance from the water was investigated. The effect of the initial dye concentration parameter on the dye removal percentage was measured. The results revealed that very high concentrations of the initial dye and low concentrations of the nano-adsorbent reduced the removal efficiency.