Investigation of the arsenic(V) retention performance of the nano-sorbent (M-TACA) synthesized by click chemistry

Abstract

In this study N-methyl-D-glucamine selective functional group is bound to magnetic nanoparticles (M-TACA) with click chemistry, which is fast, simple to use, easy to purify, versatile, region-specific and gives high product yield. The synthesized M-TACA nano-sorbent was characterized by SEM and VSM techniques. The parameters effecting sorption of As(V) onto M-TACA such as dosage, initial concentration of As(V), contact time and pH were studied. Sorption of As(V) onto M-TACA nano-sorbent is pH dependent and the maximum sorption capacity was obtained at pH 6 as 76.54 ± 1.21 mg/g. The effects of fluoride, sulfate and phosphate ions, which compete with As(V) to hold active groups, on the sorption of As(V) were investigated. Fluoride has minimal effect on arsenic uptake. It is sulfate that has the most negative effect on intake and phosphorus has had a less negative effect. Sorption is more compatible with the Langmuir isotherm model than any other applied isotherm model. Results obtained from intra particle diffusion model shown the two sorption stages indicating that both surface and intra-particle sorption occurs. At the same time, sorption percentages for five times reusability were determined as 99.6 ± 2.5%, 99.0 ± 3.0%, 98.6 ± 3.1%, 97.0 ± 3.5% and 96.6 ± 3.8%, respectively. The reusability results showed that the M-TACA nano-sorbent can be reused at least 5 times in removal of As(V).