A survey of the Efficacy of Calcium Peroxide Nanoparticles in the Removal of Reactive Red 198 from Textile Wastewater

Textile industry is one of the largest industries producing dying wastewater. Discharge of this wastewater to acceptor waters endangers aquaticslife through reducing light transmission, reducing dissolve oxygen, and increasing COD. This study investigated the efficiency of calcium peroxide nanoparticles in removal of Reactive Red 198 from synthetic wastewater and wastewater of YAZDBAF textile factory.
This experimental study was performed in spring and summer of 2014 in Environmental Health Engineering Research Center of Kerman University of Medical Science. Characteristic of synthesized nanoparticles was determined by TEM and XRD. Adsorption experiments in batch system were performed on synthetic sample and real wastewater. The effect of solution pH (3-13), initial concentration of dye (10-300 mg/L), contact time (5-90 min) and adsorbent dosage (0.05-0.6 g) was investigated and adsorption isotherms were determined. Data was analyzed by SPSS version 21, Excel 2007 softwares and Pearson correlation coefficient.
Synthesized adsorbent particles had uniformly spherical shape with approximately diameter of 15-25 nm. The optimum pH for removal of reactive red 198 was 3-7. The equilibrium contact time was 50 minutes and optimum dosage of adsorbent was 0.4 g/100 mL. In these optimum conditions, removal efficiency in synthetic and real sample was 99.58 and 76.18 percent, respectively.
Based on the results, calcium peroxide is an efficient adsorbent in removing reactive red 198 and, with attention to simplicity of synthesis, it can be used as an applied in treating textile wastewaters.