Synthesis and applications of CaCO3/HPC core–shell composite subject to heavy metals adsorption processes

Fathy, Mahmoud; Zayed, M.A.; Moustafa, Yasser M.

doi:10.1016/j.heliyon.2019.e02215

Cited by 31 publications

(13 citation statements)

References 57 publications

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“…At low initial concentration, all of the Pb 2+ ions were successfully adsorbed (40–100 mg/g) of the adsorbent, proving that indeed at low concentrations the adsorbent is very effective and efficient. Fathy et al. (2019) observed a similar trend when investigating adsorption of Pb 2+ and Co 2+ ions using CaCO 3 /HPC core-shell composite from aqueous solutions.…”

Section: Experimental Results and Analysissupporting

confidence: 61%

“…Their adsorption process was better modelled using the Langmuir isotherm (R 2 = 0.994). Fathy et al. (2019) investigated the adsorption of Pb 2+ and Co 2+ ions using CaCO 3 /HPC core-shell composite from aqueous solutions and observed that the adsorption process for Pb 2+ ions was better modelled with Langmuir isotherm (R 2 ≥ 0.930) but the adsorption of Co 2+ was better modelled by Freundlich isotherm (R 2 ≥ 0.900).…”

Section: Experimental Results and Analysismentioning

confidence: 99%

“…(2020) Hierarchical MoS 2 /SH-MWCNT nanocomposite Pb 2+ 90.00 (Freundlich isotherm) - 60 Gusain et al. (2019) CaCO 3 /HPC core-shell composite Pb 2+ 82.99 0.5119 150 Fathy et al. (2019) Hierarchical MoS 2 /SH-MWCNT nanocomposite Cd 2+ 66.67 (Freundlich isotherm) - 60 Gusain et al.…”

Section: Experimental Results and Analysismentioning

confidence: 99%

“…Li et al (2020) investigated adsorption of Hg 2þ ions from aqueous solutions using thiol functionalized cobalt ferrite magnetic mesoporous silica composite and found an inverse relationship between temperature and adsorption efficiency which they attributed to weakening of bonds between cations and adsorption sites as temperature increased. Fathy et al (2019) observed an inverse relationship between adsorption efficiency and temperature when they were investigating adsorption of Pb 2þ and Co 2þ ions using CaCO 3 /HPC core-shell composite from aqueous solutions. They reasoned that the adsorption process was exothermic for both ions.…”

Section: Adsorption Studiesmentioning

confidence: 99%

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Adsorption of lead ions from wastewater using nano silica spheres synthesized on calcium carbonate templates

Manyangadze

Chikuruwo

Narsaiah

et al. 2020

Heliyon

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Lead is a heavy metal that is bio accumulative and non-biodegradable that poses a threat to our health when it exists in excess in our bloodstream. It has found its way into wastewater from mostly chemical industrial processes. In this article, we investigated the adsorption and hence removal of lead (II) ions from wastewater in order to purify it for re-use in industrial processes or for plant and animal use. We synthesized nano silica hollow spheres (NSHS) and used them as adsorbents to remove lead ions from wastewater. When we characterized the NSHS using X-Ray diffraction, the amorphous nature of silica was evident with average crystal size of 39.5 nm. Scanning electron microscopy was used to determine the morphology of the adsorbent and the particles were found to be spherical in shape within a size range of 100-200 nm. Thermogravimetric analysis was used to determine the mass loss of NSHS which was~2% at 800 C. Our experimental results from adsorption studies showed that there was a linear relationship between temperature (27-60 C) and adsorption efficiency and an inverse relationship between initial metal concentration (50-300 mg/L) and adsorption efficiency. At a maximum temperature of 60 C and maximum initial metal concentration of 300 mg/L, the adsorption capacity was 200 mg/g and 262 mg/g, respectively while the adsorption efficiency was 99.6% and 87.4%, respectively. Our equilibrium and thermodynamic results revealed that the process was better modelled by the Langmuir adsorption isotherm (q max ¼ 266.89 mg/g and b ¼ 0.89 L/mg). The adsorption process was both endothermic (ΔH ¼ 97 kJ/mol) and spontaneous (ΔG ¼-22 kJ/mol). We can conclude that we were able to successfully synthesize NSHS, use them to remove lead (II) ions and the produced NSHS have a capacity that is higher than most other adsorbents investigated by other researchers.

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Section: Experimental Results and Analysissupporting

confidence: 61%

Section: Experimental Results and Analysismentioning

confidence: 99%

Section: Experimental Results and Analysismentioning

confidence: 99%

Section: Adsorption Studiesmentioning

confidence: 99%

See 2 more Smart Citations

Adsorption of lead ions from wastewater using nano silica spheres synthesized on calcium carbonate templates

Manyangadze

Chikuruwo

Narsaiah

et al. 2020

Heliyon

View full text Add to dashboard Cite

show abstract

“…The surface of the spheres is covered by a shell of several layers of polyelectrolytes. This system combines the properties of several different components, such as the absorption properties of CaCO 3 microspheres [ 42 ], the photoluminescent properties of AgInS 2 /ZnS QDs, and the magnetic properties of Fe 3 O 4 nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

Magneto-Fluorescent Hybrid Sensor CaCO3-Fe3O4-AgInS2/ZnS for the Detection of Heavy Metal Ions in Aqueous Media

et al. 2020

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Heavy metal ions are not subject to biodegradation and could cause the environmental pollution of natural resources and water. Many of the heavy metals are highly toxic and dangerous to human health, even at a minimum amount. This work considered an optical method for detecting heavy metal ions using colloidal luminescent semiconductor quantum dots (QDs). Over the past decade, QDs have been used in the development of sensitive fluorescence sensors for ions of heavy metal. In this work, we combined the fluorescent properties of AgInS2/ZnS ternary QDs and the magnetism of superparamagnetic Fe3O4 nanoparticles embedded in a matrix of porous calcium carbonate microspheres for the detection of toxic ions of heavy metal: Co2+, Ni2+, and Pb2+. We demonstrate a relationship between the level of quenching of the photoluminescence of sensors under exposure to the heavy metal ions and the concentration of these ions, allowing their detection in aqueous solutions at concentrations of Co2+, Ni2+, and Pb2+ as low as ≈0.01 ppm, ≈0.1 ppm, and ≈0.01 ppm, respectively. It also has importance for application of the ability to concentrate and extract the sensor with analytes from the solution using a magnetic field.

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The Enhanced Photo‐Catalytic Properties of ZnO Under the Synergistic Effect of CaCO₃

Yao,

Chen,

Yuan

et al. 2023

Cryst. Res. Technol.

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At present, the problem of environmental pollution is becoming increasingly serious. It is urgent to develop efficient catalysts to solve these problems. To obtain the functional characteristics of CaCO3 and promote its application in coatings and photo‐catalysis, ZnO/CaCO3 particles are prepared by the solution co‐precipitation method under the mediate of sodium dodecyl sulfate (SDS) through corresponding strategies. The structures and morphologies of samples are characterized by XRD, FT‐IR, SEM, and TEM, respectively. Besides that, the photo‐catalytic property of the desired product is also evaluated. The results indicate that SDS helps to induce the formation of porous structure. Through co‐precipitation, ZnO particles uniformly load on porous calcium carbonate. ZnO/CaCO3 particles are endowed with low‐cost property and high catalytic performance under the synergistic effect of photo‐catalytic properties and absorption abilities. This work established a simple way to produce the composite catalysts with low price and high photo‐catalytic activity.

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Synthesis and applications of CaCO3/HPC core–shell composite subject to heavy metals adsorption processes

Cited by 31 publications

References 57 publications

Adsorption of lead ions from wastewater using nano silica spheres synthesized on calcium carbonate templates

Adsorption of lead ions from wastewater using nano silica spheres synthesized on calcium carbonate templates

Magneto-Fluorescent Hybrid Sensor CaCO3-Fe3O4-AgInS2/ZnS for the Detection of Heavy Metal Ions in Aqueous Media

The Enhanced Photo‐Catalytic Properties of ZnO Under the Synergistic Effect of CaCO₃

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Synthesis and applications of CaCO3/HPC core–shell composite subject to heavy metals adsorption processes

Cited by 31 publications

References 57 publications

Adsorption of lead ions from wastewater using nano silica spheres synthesized on calcium carbonate templates

Adsorption of lead ions from wastewater using nano silica spheres synthesized on calcium carbonate templates

Magneto-Fluorescent Hybrid Sensor CaCO3-Fe3O4-AgInS2/ZnS for the Detection of Heavy Metal Ions in Aqueous Media

The Enhanced Photo‐Catalytic Properties of ZnO Under the Synergistic Effect of CaCO3

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The Enhanced Photo‐Catalytic Properties of ZnO Under the Synergistic Effect of CaCO₃