Chitosan stabilized bimetallic Fe/Ni nanoparticles used to remove mixed contaminants-amoxicillin and Cd (II) from aqueous solutions

Calcium alginate encapsulated Ni/Fe nanoparticles beads for simultaneous removal of Cu (II) and monochlorobenzene

“…To further improve dechlorination, a metal catalyst, such as Pd, Ni and Cu, was dispersed onto the nZVI to form a bimetallic nanoparticle system [9,10]. However, these nanoparticles in the aquifer tended to agglomerate into larger particles which resulted in their high reactivity decreasing.…”

Adsorption kinetics and thermodynamics of organophosphorus profenofos pesticide onto Fe/Ni bimetallic nanoparticles

“…Also, the peak at 2h = 44.8°c orresponds to Fe/Ni nanoparticles. Furthermore, iron oxide layers such as c-Fe 2 O 3 (2h = 35.68°) and Fe 3 O 4 (2h = 35.45°) were formed on Fe/Ni nanoparticles (Wang and Zhu 2007;Weng et al 2013). This can be explained by the corrosion of Fe as a reductant to form oxide of Fe (II) and Fe (III), and PFF adsorbed on iron oxides (Gupta and Nayak 2012).…”

Simultaneous removal of trichloroethylene and hexavalent chromium by green synthesized agarose-Fe nanoparticles hydrogel

“…In Curve d, peaks shifting from 3410 to 3433 cm À1 and from 2922 to 2988 cm À1 were recorded, indicating AOH and ACH were both involved in the removal of TCE. Furthermore, two more weak signals were presented on both Curves c and d. Signals at 538 and 489 cm À1 as well as 539 and 446 cm À1 resulted from stretching vibrations of FeAO [20], confirming iron oxides including Fe 2 O 3 and Fe 3 O 4 were formed after reaction. A remarkable shift from 489 to 446 cm À1 suggested that the presence of TCE in the coremoval system had some influence on the formation of iron oxides.…”

“…Generally, pseudo-first-order reduction kinetic and pseudo-second-order adsorption kinetic models can better establish the prognosis for the reduction and adsorption processes concerning reaction by green synthesized Fe-based NPs [20,47]. The pseudo-second-order adsorption kinetic equation can be written as follows:…”

“…A wide range of contaminants, for instance, heavy metals, azo dyes, nitrate, chlorinated organic compounds, and nitroaromatic compounds, have been separately removed by Fe-based NPs [17][18][19]. One recent promising advance is represented by chitosan stabilized bimetallic Fe/Ni NPs simultaneously removing amoxicillin and Cd(II) from aqueous solution [20]. The result revealed that reducing amoxicillin and adsorption of Cd(II) were co-presented, suggesting Fe-based NPs have the potential to simultaneously remove mixed contaminants from wastewater.…”