Removal of Alizarin Red and Purpurin from Aqueous Solutions Using Fe۳O۴ Magnetic Nanoparticles

The applicability of Fe۳O۴ nanoparticles (Fe۳O۴NPs) for removing alizarin and purpurin from aqueous solutions has been reported. The influence of nanoparticle dosage, pH of the sample solution, individual dye concentration, contact time between the sample and the adsorbent, temperature, and ionic strength of the sample solution were studied by performing a batch adsorption technique. The maximum removal of ۵-۱۰۰ mg l-۱ of individual dyes from an aqueous sample solution at pH ۵.۰ was achieved within ۵.۰ min when an adsorbent amount of ۲۰ mg was used. The kinetic results revealed that the pseudo-second-order equation is the best model to analyze the adsorption mechanism. The isotherm analysis indicated that the equilibrium data are well fitted to the Langmuir isotherm model with maximum adsorption capacities of ۴۵.۸۷ and ۴۰.۴۸ mg g-۱ of the adsorbent for removal of alizarin and purpurin, respectively. According to the experimental results, about ۹۹% of alizarin and ۹۵% of purpurin were removed from aqueous solutions under applying the optimal experimental conditions.

کلیدواژه ها:

Iron oxide magnetic nanoparticles ، Alizarin red ، Purpurin ، Dye removal ، Anthraquinone dyes