Removal of Sb(III) from wastewater by magnesium oxide and the related mechanisms

Xu, Si; Zhong, Zuqi; Liu, Weizhen; Deng, Hong; Lin, Zhang

doi:10.1016/j.envres.2020.109489

Cited by 49 publications

(12 citation statements)

References 43 publications

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“…It is widely recognized that MgO can react with water to generate Mg(OH) 2 [ 33 ]. The characteristic bond occurred at 820 cm −1 , confirming the existence of MgO bands [ 32 ]. The pore size distribution and N 2 adsorption–desorption isotherms of the as-obtained MgO nanoparticles are exhibited in Figure 3 c,d, respectively.…”

Section: Resultsmentioning

confidence: 81%

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Highly Selective Removal of Cationic Dyes from Wastewater by MgO Nanorods

et al. 2022

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The organic synthetic dyes employed in industries are carcinogenic and harmful. Dyes must be removed from wastewater to limit or eliminate their presence before dumping into the natural environment. The current study aims to investigate the use of MgO nanoparticles to eliminate basic fuchsine (BF), as a model cationic dye pollutant, from wastewater. The MgO nanorods were synthesized through a coprecipitation method. The obtained nanocomposite was characterized using various techniques such as X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), Brunauer–Emmett–Teller (BET), and FTIR spectroscopy. It was found that the variation of dye concentration and pH influenced the removal of BF by MgO. The adsorption capacity of 493.90 mg/g is achieved under optimum operating conditions (pH = 11, contact time = 236 min, and initial BF concentration = 200 ppm). Pseudo-second-order adsorption kinetics and Freundlich isotherm models best fitted BF sorption onto MgO nanorods. The BF sorption mechanism is associated with the electrostatic attractions and hydrogen bond between the O–H group of MgO and the NH2 groups of BF, as indicated by the pH, isotherms, and FTIR studies. The reusability study indicates that MgO was effectively used to eliminate BF in at least four continuous cycles. The investigation of MgO with different dyes suggests the high adsorption selectivity of BF, crystal violet (CV), and malachite green (MG) dyes compared with methyl orange (MO) dye. Overall, MgO nanorods can act as a potential and promising adsorbent for the efficient and rapid removal of cationic dyes (CV, MG, and BF) from wastewater.

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Section: Resultsmentioning

confidence: 81%

“…The sharp and strong band at 3725 cm −1 was assigned to the A 2u (OH) lattice vibration [ 31 ]. The large band at 3438 cm −1 was assigned to the stretching vibration of the O–H group [ 32 ]. Bands in the range 1458–1640 cm −1 were linked to the adsorbed water molecule’s −OH stretching mode.…”

Section: Resultsmentioning

confidence: 99%

Highly Selective Removal of Cationic Dyes from Wastewater by MgO Nanorods

et al. 2022

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“…Similarly, the triazine ring mode peak at 891 cm -1 also shifts slightly to 883 cm -1 . In addition, both Mg-O and Ti-O stretching vibration modes [50,51] have mostly changed position indicating the interaction between Cd (II) and oxygen atoms of MgO@TiO 2 @g-C 3 N 4 by ππ stacking bridging [52]. This result indicates that functional groups of MgO@TiO 2 @g-C 3 N 4 (OH, CN, and N-H) and π delocalized electron systems of the triazine ring (C 3 N 3 ) most probably are involved in the removal of Cd (II).…”

Section: Effect Of Equilibrium Contact Duration On CD (Ii)mentioning

confidence: 99%

Efficient Removal of Cd (II) from Aquatic Media by Heteronanostructure MgO@TiO₂@g‐C₃N₄

Modwi

Ismail

Idriss

et al. 2022

Journal of Nanomaterials

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MgO@TiO2@g-C3N4 heteronanostructure was synthesized using a simple ultrasonication technique and assessed potentially to remove Cd (II) from aqueous environments. X-ray diffraction analysis confirms composite formation with mean crystallite size in the range of 4-17 nm while transmission electron microscopy analysis reveals nanosheet-like nanoparticles with the homogeneous elemental distribution. N2 adsorption-desorption measurements indicate the formation of a mesoporous structure with a BET surface area of about 107 m2/g. Fourier-transformed infrared elucidates the presence of O–H, amino groups, triazine, Mg–O, and Ti–O vibrations modes. At the same time, X-ray photoelectron spectroscopy analysis manifests the presence of Mg, O, N, Ti, and C elements. For aqueous Cd (II) ions, the MgO@TiO2@g-C3N4 nanostructure displays a superior adsorption efficiency, reaching 99.94% Cd (II) elimination with an optimum adsorption capacity of 515.86 mg/g in a short duration of 16 min. This study demonstrates the capability of using the MgO@TiO2@g-C3N4 nanostructure as an efficient and reusable adsorbent for the uptake of Cd (II) ions in wastewater treatment and potentially for the removal of other heavy metal ions.

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“…FTIR analysis has been performed to determine the chemical bonds and composition (purity) of the prepared compounds (see Figure 4). FTIR spectra display a broad band at 3465 cm -1 assigned to the stretching vibration of the O-H group [45], whereas the band at 1639 cm -1 is ascribed to the adsorbed water molecule's -OH stretching mode. In addition, the three bands observed at 1524, 1406, and 1056 cm -1 are related to a unidentate carbonate adsorbed on the surface of nanoparticles [46].…”

Section: Kinetic Model Kinetic Equation Parameters Valuesmentioning

confidence: 99%

Green Ca‐Loaded MgO Nanoparticles as an Efficient Adsorbent for Organic Hazardous Dyes

Al-Awaji

Boukriba

Albadri

et al. 2022

Journal of Nanomaterials

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Textile industry wastewater is a principal source of environmental contamination, posing serious health and environmental risks; consequently, appropriate treatments are necessary before ultimate discharge to ensure environmental and public health safety. In this study, 10% Ca-doped MgO (Ca0.10Mg0.90O) has been prepared via a green and ecologically benign approach using aqueous solution of gum arabic (GA) and then used to eliminate Congo red (CR) from aqueous solution. The XRD analysis reveals a size reduction of MgO nanoparticles from 11 to 6 nm after doping with a surface area reaching 50.1 m2·g-1 for the synthesized heterostructure. An excellent adsorption efficiency of 97% has been achieved under the following optimal operational conditions, i.e., adsorbent dosage of Ca0.10Mg0.90O (0.400 g/L), contact time of 120 min, and solution pH of 7.00. As indicated by pH, isotherm, and FTIR examinations, the CR sorption process is related to chemisorption and hydrogen bonding. The findings indicate that the synthesized nanomaterial is a suitable candidate for dyes containing effluent treatment due to its facile green synthetic approach using a natural product GA, low-cost, mesoporous nature, and high uptake capacity under neutral solution pH.

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Removal of Sb(III) from wastewater by magnesium oxide and the related mechanisms

Cited by 49 publications

References 43 publications

Highly Selective Removal of Cationic Dyes from Wastewater by MgO Nanorods

Highly Selective Removal of Cationic Dyes from Wastewater by MgO Nanorods

Efficient Removal of Cd (II) from Aquatic Media by Heteronanostructure MgO@TiO₂@g‐C₃N₄

Green Ca‐Loaded MgO Nanoparticles as an Efficient Adsorbent for Organic Hazardous Dyes

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Removal of Sb(III) from wastewater by magnesium oxide and the related mechanisms

Cited by 49 publications

References 43 publications

Highly Selective Removal of Cationic Dyes from Wastewater by MgO Nanorods

Highly Selective Removal of Cationic Dyes from Wastewater by MgO Nanorods

Efficient Removal of Cd (II) from Aquatic Media by Heteronanostructure MgO@TiO2@g‐C3N4

Green Ca‐Loaded MgO Nanoparticles as an Efficient Adsorbent for Organic Hazardous Dyes

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Efficient Removal of Cd (II) from Aquatic Media by Heteronanostructure MgO@TiO₂@g‐C₃N₄