Effective removal of cationic methylene blue and crystal violet dyes on a novel magnetic Fucus vesiculosus (brown algae)

In this project, a new magnetic Fucus vesiculosus (m-FV) nanoparticle with a high adsorption capacity of cationic dyes was prepared. To achieve a high effective nanocomposite, Fucus vesiculosus (FV) modified using ultrasound and then, the magnetic property induced via in situ co-precipitation of iron ions in the presence of FV1. The produced m-FV examined to remove cationic methylene blue (MB) and crystal violet (CV) dyes from aqueous solutions. The effect of contact time revealed a fast removing of MB and CV, reaching equilibrium at 10 and 5 minutes, respectively. Adsorption process Kinetics modeled and the results presented the best fit of experimental data for pseudo-second-order (PSO) than that of pseudo-first-order (PFO) kinetic model in MB and CV adsorption processes2. Analyzing equilibrium isotherm data carried out using Langmuir and Freundlich models and the results revealed a better fitting to the Langmuir model for MB and CV adsorption processes. According to the Langmuir model, the maximum adsorption capacity of m-FV obtained 577 and 1062 mg.g-1 for MB and CV, respectively3. Easy recovery, good recyclability, pH and temperature-independent properties of m-FV nanoparticles, moreover than high adsorption capacity, could be employed as an effective and low-cost adsorbent in the removal of dye pollutions4.

کلیدواژه ها:

Magnetic ، Fucus vesiculosus ، Adsorption ، Cationic dyes