Selective removal of lead ions from aqueous solutions using SiO2–MoO3: Isotherm, kinetics and thermodynamic studies

Sulejmanović, Jasmina; Kovač, Neira; Memić, Mustafa; Šabanović, Elma; Bеgić, Sаbinа; Sher, Farooq

doi:10.1016/j.cscee.2021.100083

Cited by 18 publications

(11 citation statements)

References 19 publications

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“…The value of ΔG° decreases demonstrating the viability and spontaneous sorption process. The negative value of enthalpy (-41.66) & entropy(-144.46) indicates the exothermic reaction and less irregularity at the adsorbate during Pb 2+ sorption Fig 11 and Table3, similar results were given for lead adsorption by SiO2-MoO3(Sulejmanović et al, 2021).…”

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confidence: 69%

Effect of Modified Surface of Cotton Straw Nanocellulose and Their Application for Removal of Lead from Aqueous Solution

Sheetal

Pal

2023

Preprint

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In recent years, there is a rapid growth in nanotechnology. This study's goals were to first modify the nanocellulose surface using titanium dioxide (TiO2) to become nanocomposite and then determine how well a nanocomposite adsorbs lead ions from water. Nanocellulose was synthesized from the cotton straw residue using chemical and mechanical methods. The layer of titanium dioxide is coated on nanocellulose. The nanocomposite of titanium dioxide was characterized by using FTIR, XRD, and FESEM. The results showed that Ti-O-Ti bonding was observed at 505.02 cm-1. The structure of the nanocomposite is much more disordered and irregular. The presence of a 65 % anatase phase and 32 % rutile phase is found in the crystalline particle of the nanocomposite. The crystal structure of the nanocellulose and nanocomposite is found with particle sizes 18 nm and 83 nm. The nanocomposite was utilized to absorb lead ion concentration from the aqueous solution. The adsorption capacity of nanocomposite was analyzed with kinetics, isothermal and thermodynamic models. Kinetic parameters show that the pseudo 2nd order (R2=0.98) nonlinear kinetic model is the best fitted and in isotherm model Langmuir (R2=0.99), Elovich (R2=0.99) and Baudu (R2=0.99) isotherms were well suited for the adsorption of lead ions. Thermodynamic parameters resulted in Gibbs free energy decreasing with temperature.

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confidence: 69%

Effect of Modified Surface of Cotton Straw Nanocellulose and Their Application for Removal of Lead from Aqueous Solution

Sheetal

Pal

2023

Preprint

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“…Selecting the adsorbent is a crucial step in designing an effective adsorption process. Many adsorbents are available in the literature for efficient dye removal, including activated carbons, − chitosan composites, , metal–organic framework (MOF) materials, porous silica materials, − carbon nanotubes, graphene oxide, and so forth. However, these materials have several disadvantages, including complex synthesis routes and extremely high costs, limiting their application in adsorption processes.…”

Section: Introductionmentioning

confidence: 99%

3-Aminopropyl-triethoxysilane-Functionalized Tannin-Rich Grape Biomass for the Adsorption of Methyl Orange Dye: Synthesis, Characterization, and the Adsorption Mechanism

et al. 2022

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A biomass amino silica-functionalized material was successfully prepared by a simple sol–gel method. 3-Aminopropyltriethoxysilane (APTES) was added to a tannin-rich grape residue to improve its physicochemical properties and enhance the adsorption performance. The APTES functionalization led to significant changes in the material’s characteristics. The functionalized material was efficiently applied in the removal of methyl orange (MO) due to its unique characteristics, such as an abundance of functional groups on its surface. The adsorption process suggests that the electrostatic interactions were the main acting mechanism of the MO dye removal, although other interactions can also take place. The functionalized biomass achieved a very high MO dye maximum adsorption capacity ( Q max ) of 361.8 mg g –1 . The temperature positively affected the MO removal, and the thermodynamic studies indicated that the adsorption of MO onto APTES-functionalized biomass was spontaneous and endothermic, and enthalpy is driven in the physisorption mode. The regeneration performance revealed that the APTES-functionalized biomass material could be easily recycled and reused by maintaining very good performance even after five cycles. The adsorbent material was also employed to treat two simulated dye house effluents, which showed 48% removal. At last, the APTES biomass-based material may find significant applications as a multifunctional adsorbent and can be used further to separate pollutants from wastewater.

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“…3 Graphene nanosheets (GNS). 4 Sulfonated graphene nanosheets (S-GNC). 5 Graphene-like nanoflakes (GNFs).…”

Section: Performancementioning

confidence: 99%

“…1 Pristine graphene (PG) with N 2(g) annealing at 800 • C. 2 Nitrogen-doped graphene (NG) with NH 3(g) annealing at 800 • C. 3 Graphene nanosheets (GNS). 4 Sulfonated graphene nanosheets (S-GNC). 5 Graphene-like nanoflakes (GNFs).…”

Section: Performancementioning

confidence: 99%

“…Clean water is essential for humans, and the accessibility of affordable clean water is a challenge for many countries due to growing population and extreme climate change. Novel water treatment technologies and nanomaterials have gained considerable attention, especially for removal of micropollutants [1], pesticides [2], heavy metals [3,4], antibiotics [5], and drugs [6]. Water treatment technologies for obtaining clean water from seawater and brackish water or reused water have been developed to solve the water shortage problems.…”

Section: Introductionmentioning

confidence: 99%

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Salt Removal by Chemically Modified Graphene in Capacitive Deionization (CDI)

Peng

Chen

Wang

2022

Water

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Obtaining clean water from salt water by capacitive deionization (CDI) with chemically modified graphene (rGO) was explored in this study. Strong acid (HNO3:H2SO4 = 2:1) was employed to modify rGO to enhance its hydrophilicity and electrochemical properties. Characteristics of rGO with/without acid modification were analyzed by XRD, SEM, FTIR, contact angle, BET, and cyclic voltammetry (CV). Contributions of sulfonic acid groups, hydroxyl groups, and NO2 stretching after acid modification resulted in better wettability and higher specific capacitance of rGO. The contact angle for rGO dropped from 84.9° to 35.1° (am-rGO), indicating improved hydrophilicity of rGO with acid modification. The specific capacitance of am-rGO can reach 150.2 F/g at the scan rate of 1 mV/s. The average NaCl electrosorption capacity of the CDI process with am-rGO was 0.63 mg NaCl/g electrode (10.86 μmol NaCl/g electrode), which indicated rGO with acid modification can enhance the electrosorption capacity by 3.9 times. This study demonstrated that chemical modification can significantly improve the hydrophilicity, electrochemical properties, and electrosorption performance of rGO, which has potential for applications to other carbon-based materials for CDI systems to improve salt removal efficiency.

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Selective removal of lead ions from aqueous solutions using SiO2–MoO3: Isotherm, kinetics and thermodynamic studies

Cited by 18 publications

References 19 publications

Effect of Modified Surface of Cotton Straw Nanocellulose and Their Application for Removal of Lead from Aqueous Solution

Effect of Modified Surface of Cotton Straw Nanocellulose and Their Application for Removal of Lead from Aqueous Solution

3-Aminopropyl-triethoxysilane-Functionalized Tannin-Rich Grape Biomass for the Adsorption of Methyl Orange Dye: Synthesis, Characterization, and the Adsorption Mechanism

Salt Removal by Chemically Modified Graphene in Capacitive Deionization (CDI)

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