Arsenic removal from water by starch functionalized maghemite nano-adsorbents: Thermodynamics and kinetics investigations

Removal and Oxidation of As(III) from Water Using Iron Oxide Coated CTAB as Adsorbent

“…Considering the experimental conditions and the adsorption process parameters such as pH solution, sorbent mass, initial concentration of pollutant material, and the experiment duration, the adsorption capacity of As(III) ions by iron oxide or iron oxide composites was reported between 8 and 66.53 mg/g [ 11 , 45 , 46 ]. Nonetheless, during the years, extensive research has been conducted with the sole purpose of improving the properties of adsorbents [ 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 ]. Moreover, in their recent studies, Otero-González et al [ 13 ] reported that the estimated maximum adsorption values (q max ) values obtained in the case of As(III) retention on novel nanostructured iron oxide cryogels were 625 and 588 mg As(III) per g of Fe for the IO gel and the IO/AAm/MBAA cryogel, respectively.…”

“…The adsorption isotherms for the arsenic removal by IO-CTAB nanoparticles were obtained by mixing solutions containing different concentrations of As(III) with 0.2 g of IO-CTAB nanoparticles until thermodynamic equilibrium at ambient temperature (T = 25 • C) was achieved. Previously reported studies emphasized that the thermodynamic equilibrium at ambient temperature can be achieved in less than 24 h [13][14][15][16][17][18][19][20][21].…”

“…In water treatment technologies, adsorption processes are usually involved, and the materials used as adsorbents should possess specific features such as small-sized particles and a large specific surface area. Iron oxide nanoparticles with a highly specific surface area have been investigated as low-cost adsorbents with a high adsorption capacity for metal ions, which could also be conveniently recovered by magnetic separation after the decontamination process [10][11][12][13][14][15][16][17][18][19][20][21]. Therefore, this study focused on the development of iron oxide nanoparticles coated with cetyltrimethylammonium bromide (CTAB) nanoparticles for environmental applications.…”

“…Research made in the material sciences for environmental applications related to the synthesis and modification of nanoparticles (NPs) has had a great impact on material engineering and surface science applications due to the unique chemical and physical properties of materials at a nanometric scale compared to bulk materials. In recent years, the interest in the efficient synthesis of magnetic iron oxide nanoparticles and their functionalization has increased considerably due to their wide range in various applications as well as their applications for metal ion removal from aqueous solutions [ 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 ]. Previous studies have reported that different iron oxide species such as Fe 3 O 4 , α-Fe 2 O 3 , and ɤ-Fe 2 O 3 that interact with As had the ability to remove both As(III) and As(V) from water [ 15 , 19 ].…”

Cadmium Removal from Synthetic Wastewater using Seed Biomass Biosorbent: A Bench-top Reactor Investigation

“…In the Table 3 study of comparative equilibrium parameters of different models and their regression coefficients were better in presently used seed biomass compared to activated carbon (Yao et al 2014), starch maghemite (Siddiqui et al 2020), Fe3O4/activated carbon composite (Joshi et al 2019), Farmyard manure bio-char (Idreeset al 2018), Poultry manure based bio-char (Idreeset al 2018), plant bark (Aregawi et al 2013) and other seed (Aregawi et al 2013). It showed the amount of non-linearity between composition and adsorption of cadmium into the adsorbent plane and exhibits no uniformity regarding binding site sharing.…”