Process optimization studies of crystal violet dye adsorption onto novel, mixed metal Ni0.5Co0.5Fe2O4 ferrospinel nanoparticles using factorial design

• Published in: Journal of water process engineering 2017-04, Vol.16, p.132-141
• Main Authors: Farooq, Saima, Saeed, Abubakr, Sharif, Muhammad, Hussain, Javid, Mabood, Fazal, Iftekhar, Maryam
• Format: Article
• Language: English
• Subjects: Full factorial design; Mixed metal ferrites; Nanoparticles; Optimization; Waste water
• ISSN: 2214-7144; 2214-7144
• DOI: 10.1016/j.jwpe.2017.01.001

A scheme showing the interaction mechanism of crystal Violet dye (adsorbate) to Ni0.5Co0.5Fe2O4 (NCF) nanoparticles (adsorbent). [Display omitted] •Evaluation of a mixed-metal oxide nanoparticles as an adsorbent material.•Systematic investigation of effect process variables on %dye removal efficiency by a full-factorial design methodology.•Optimization of process variables for the maximum dye uptake from aqueous solution using Response Surface Methodology. Among various kinds of pollutants released into the environment, dyes are considered as one of the most hazardous contaminant. A mixed metal magnetic Ni0.5Co0.5Fe2O4 nanoparticles were successfully used as an adsorbent for the uptake of Crystal Violet (CV) dye from aqueous solution. A 25full factorial design was applied to investigate the effect of multiple process variables on the% dye removal efficiency. The experimental values were found to be in excellent conformity with the model predicted values. The optimum values of the tested parameters for maximum removal of CV dye from aqueous solution were obtained as follows: pH=11.0; Initial concentration of dye=13.57mg/L; Adsorbent amount=0.089g; contact time=35min; and Temperature=22°C. The R2 value 99.86% shows the satisfactory explanatory power of model. This may provide theoretical basis for further research and utilization of newly designed adsorbent for the uptake of various kinds of dyes from waste water.