The adsorption of crystal violet from an aqueous solution by polyacrylic acid-bound magnetic nanoparticles was studied. It was shown that the magnetic nano-adsorbent was quite efficient for the adsorption/desorption of crystal violet. In the aqueous solution of crystal violet at 25°C, the adsorption behavior followed the Langmuir adsorption isotherm with a maximum adsorption amount of 116 mg g-1 and a Langmuir adsorption equilibrium constant of 0.005 L mg-1. In the methanol solution of acetic acid (1.0-8.0%), desorption of crystal violet increased up to 100% with increasing the acetic acid concentration. The reusability of magnetic nano-adsorbent and the effects of temperature, pH, and phosphate on the adsorption of crystal violet were also investigated. Additionally, it was very noteworthy that the adsorption/desorption rate of crystal violet was quite fast (required time < 1 min) due to the absence of pore-diffusion resistance. The developed magnetic nano-adsorbent will be useful in the removal of cationic dyes from wastewater.
All Science Journal Classification (ASJC) codes
- Chemical Engineering(all)
- Process Chemistry and Technology
- Filtration and Separation