A new nanostructured material amino functionalized mesoporous silica synthesized via co-condensation method for Pb(II) and Ni(II) ion sorption from aqueous solution

Ghorbani, Masoomeh; Nowee, Seyed Mostafa; Ramezanian, Navid; Raji, Foad

doi:10.1016/j.hydromet.2016.02.002

Cited by 44 publications

(11 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As an adsorbent (Pananyotova 2000), the surface area of microporous material is smaller and the adsorption effect is not ideal. Nanomesoporous material not only plays a role in catalytic reactions such as macromolecular adsorption, but also it is a good adsorbent for heavy metals, which has been used in the adsorption of Pb(II), Ni(II) ion (Ghorbani et al 2016) and Cu(II) ion (Dana and Sayari 2011). As a nanomesoporous adsorption material, SBA-15 (Zhai et al 2013) has large specific surface area and high adsorption capacity and it has obvious adsorption effect without adding any chemical reagents.…”

Section: Introductionmentioning

confidence: 99%

Efficient removal of cadmium(II) with SBA-15 nanoporous silica: studies on equilibrium, isotherm, kinetics and thermodynamics

Zhai

2019

Appl Water Sci

View full text Add to dashboard Cite

Nanomesoporous silica SBA-15 was prepared by hydrothermal method. The samples were characterized by powder X-ray diffraction and scanning electron microscopy. The fibrous particles with a diameter of 333 ± 10 nm were obtained. Nanoporous mesoporous SBA-15 was used as an adsorbent to adsorb Cd 2+ in water body. The effects of conditions such as acidity were studied, and the optimized adsorption conditions were obtained. The results showed that when the pH value was 5.0, the temperature was 25 ± 1 °C and the adsorption time was 40 min, the nanomesoporous SBA-15 had the best adsorption effect for Cd 2+ and the adsorption rate was reached 73.28% and the adsorption capacity was 9.84 mg/g. Study found that the adsorption is the quasi-second-order kinetic model, which belongs to the Freundlich adsorption type. The results of adsorption thermodynamics showed that when the temperature is 25-55 °C, the adsorption is spontaneous exothermic reaction, ∆G 0 < 0, the adsorption enthalpy change ΔH 0 = − 54.732 kJ/mol, the adsorption entropy change ∆S 0 = − 129.343 J/(mol K). The effects of nitric acid and hydrochloric acid on desorption were investigated, respectively. The results showed that the desorption effect of 0.1 mol/L nitric acid as desorbent was better than that of hydrochloric acid. At desorption for 10 h, the desorption rate was the highest, reaching 65.56%.

show abstract

Section: Introductionmentioning

confidence: 99%

Efficient removal of cadmium(II) with SBA-15 nanoporous silica: studies on equilibrium, isotherm, kinetics and thermodynamics

Zhai

2019

Appl Water Sci

View full text Add to dashboard Cite

show abstract

“…It might be concluded that all active sites were entirely exposed at lower doses, while only a fraction of the active sites were exposed at higher doses 63,70 . Therefore, the adsorption capacity reduces when dosage of the adsorbent increases due to the possibility of aggregation that leads to reduction of the total adsorbent surface area 44,71–75 . According to the above consideration, 3 g.L −1 of PTh‐PVP‐SA‐Cu was enough to remove the quantitative amount of Pb(II) ions from aqueous solutions.…”

Section: Resultsmentioning

confidence: 98%

The modified polythiophene‐Cu NPs composites for Pb(II) ions removal from aqueous solution

Karegar

Khodaei

2021

J of Applied Polymer Sci

View full text Add to dashboard Cite

The present work describes the use of chemically modified polythiophene with copper nanoparticles and polyvinylpyrolidine‐sulfonic acid (PTh‐PVP‐SA‐Cu) as an adsorbent for the removal of Pb(II) ions from aqueous solution. The synthesized composite, PTh‐PVP‐SACu, was characterized by different techniques including Fourier‐transform infrared spectrometer, scanning electron microscopy, energy dispersive X‐ray spectroscopy (EDX), transmission electron microscopy, X‐ray powder diffraction, thermogravimetric analysis (TGA), and differential scanning calorimetry. This nanocomposite has good conductivity and thermal stability due to the presence of copper nanoparticles. The acidic doping agent, polyvinylpyrolidine‐sulfonic acid, can act as the surfactant and improves the polymerization of thiophene in the aqueous medium. The conductivity of PTh was 0.54 S/cm, while the conductivities of PTh‐Cu with 10 and 20 wt% of PVP‐SA under the same reaction conditions were 2.3 and 2.7 S/cm, respectively. The influence of pH, adsorbent dosage, temperature, contact time, and concentration on the removal of Pb(II) ions was evaluated. The optimum conditions for the removal of Pb(II) ions were 25°C with the adsorbent dosage of 3 g.L−1 at pH = 7. The adsorption capacity was obtained to be 111 mg. g−1. The obtained equilibrium data for PTh‐PVP‐SA‐Cu was fitted well by Langmuir isotherm model indicating that the adsorption process was monolayer adsorption and distribution of adsorption sites on the surface of PTh‐PVP‐SA‐Cu was homogeneous. The maximum monolayer capacity obtained from the Langmuir isotherm was 121.9 mg. g−1 for Pb(II) ions at 45°C. The values of Gibbs free energy (ΔG), entropy change (ΔS) and enthalpy change (ΔH) indicated the feasibility, spontaneity and the endothermic nature of the adsorption process, respectively. The kinetic process followed the pseudo‐second‐order kinetic model. The recyclability studies revealed that PTh‐PVP‐SA‐Cu could be reused for three consecutive cycles.

show abstract

“…Thus, saturated adsorption would be achieved at that time. 62 The equilibrium adsorption of the metal ions on SiPy was in the order Cu(II) > Zn(II) > Cd(II) > Pb(II) (Fig. 7).…”

Section: Langmuir Modelmentioning

confidence: 95%

Kinetics, thermodynamics, equilibrium, surface modelling, and atomic absorption analysis of selective Cu(ii) removal from aqueous solutions and rivers water using silica-2-(pyridin-2-ylmethoxy)ethan-1-ol hybrid material

et al. 2022

View full text Add to dashboard Cite

show abstract

A new nanostructured material amino functionalized mesoporous silica synthesized via co-condensation method for Pb(II) and Ni(II) ion sorption from aqueous solution

Cited by 44 publications

References 31 publications

Efficient removal of cadmium(II) with SBA-15 nanoporous silica: studies on equilibrium, isotherm, kinetics and thermodynamics

Efficient removal of cadmium(II) with SBA-15 nanoporous silica: studies on equilibrium, isotherm, kinetics and thermodynamics

The modified polythiophene‐Cu NPs composites for Pb(II) ions removal from aqueous solution

Kinetics, thermodynamics, equilibrium, surface modelling, and atomic absorption analysis of selective Cu(ii) removal from aqueous solutions and rivers water using silica-2-(pyridin-2-ylmethoxy)ethan-1-ol hybrid material

Contact Info

Product

Resources

About