Adsorption of malachite green dye over synthesized calcium silicate nanopowders from waste materials

Hashem, Amira A.; Mahmoud, Sawsan A.; Geioushy, Ramadan A.; Fouad, Osama A.

doi:10.1016/j.mseb.2023.116605

Cited by 21 publications

(3 citation statements)

References 44 publications

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“…In the case of adsorption methodology, all the references reviewed but two fitted its experimental data to the Langmuir isotherm model, the two exceptions are references [102] and [109] which fitted its data to the Freundlich isotherm. However, these nanomaterials performed quite different in the removal of both cationic and anionic dyes, and within the very same dye, as results in Table 12 demonstrated in the case of the adsorption of Congo Red and Methylene Blue.…”

Section: Discussionmentioning

confidence: 99%

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Removal of Hazardous Organic Dyes from Liquid Wastes Using Advanced Nanomaterials

Alguacil,

Alonso

2024

Preprint

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The presence of organic dyes in aqueous environments is of extreme hazardousness against life due to the toxicity of these compounds. Thus, its removal from these various aquatic media is of the utmost importance and several technologies are constantly proven to match this goal. Among these technologies, various types of degradation and adsorption are the most widely used, and of the various types of materials used within these technologies, nanomaterials are constantly developed and investigated, probably due to the various properties that these nanomaterials presented. This work reviewed recent developments (2023 year) about the use of these nanomaterials on the treatment of solutions contaminated with these toxic organic dyes.

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Section: Discussionmentioning

confidence: 99%

“…Dyedesorption was investigated by the use of acetone; after continuous adsorption-desorption cycles, it was shown that after six cycles the adsorption efficiency decreased from 100% (first cycle) to 78% (sixth cycle). This decrease attributable to the decrease in the number of the surface-active sites after continuous use [102].…”

Section: Figurementioning

confidence: 96%

Removal of Hazardous Organic Dyes from Liquid Wastes Using Advanced Nanomaterials

Alguacil,

Alonso

2024

Preprint

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“…This is when the importance of silica coating becomes relevant. Silica is a favorable material for surface coating due to its stability, chemical inertness, lack of toxicity, large surface area, high rigidity, thermal stability, low cost, being environmentally friendly, and facile modification 40 – 42 . Silica coating improves the adsorption capacity over a wide range of pH values, which makes it suitable for adsorption under varying solution conditions 43 .…”

Section: Introductionmentioning

confidence: 99%

Design of silver-zinc-nickel spinel-ferrite mesoporous silica as a powerful and simply separable adsorbent for some textile dye removal

Okba,

Rabea,

El-Sheikh

et al. 2024

Sci Rep

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Silver-zinc-nickel spinel ferrite was prepared by the co-precipitation procedure with the precise composition Ag0.1Zn0.4Ni0.5Fe2O4 for bolstering pollutant removal effectiveness while upholding magnetic properties and then coated with a mesoporous silica layer. The surface characteristics and composition of Ag0.1Zn0.4Ni0.5Fe2O4@mSiO2 were confirmed using EDX, FT-IR, VSM, XRD, TEM, SEM, and BET methods. The surface modification of Ag-Zn-Ni ferrite with a silica layer improves the texture properties, where the specific surface area and average pore size of the spinel ferrite rose to 180 m2/g and 3.15 nm, respectively. The prepared spinel ferrite@mSiO2 has been utilized as an efficient adsorbent for eliminating methyl green (MG) and indigo carmine (IC) as models of cationic and anionic dyes from wastewater, respectively. Studying pH, Pzc, adsorbent dosage, dye concentration, and temperature showed that efficient removal of MG was carried out in alkaline media (pH = 12), while the acid medium (pH = 2) was effective for IC removal. Langmuir isotherm and pseudo-second-order kinetics were found to be good fits for the adsorption data. Both dyes were adsorbed in a spontaneous, endothermic process. A possible mechanism for dye removal has been proposed. The adsorbent was effectively recovered and reused.

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Mechanism investigation on selective adsorption of fabric loaded with calcium silicate for organic dyes

Bai,

Jia

2024

J of Applied Polymer Sci

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Selective adsorption plays an important role in the resource utilization of dye wastewater. Hydrated calcium silicate (CSH), as an ideal adsorption material, is successfully compounded on the surface of polypropylene (PP) fibric by quasi‐solid‐phase method, and porous calcium silicate film is formed on the surface of PP fabric. The contact angle of the surface of PP fibers is changed from 130.7° to 62.4° due to the hydrophilic characteristics of CSH and polyvinyl alcohol. The adsorption for dyes shows obvious selectivity, and the removal ratio for methylene blue can reach more than 90%, while there is almost no adsorption for methyl orange. The obvious selectivity can be attributed to the electrostatic interaction between CSH and dyes. CSH contains silicate anion chains, resulting in a large number of negatively charged sites distributed on the surface, which may be the main reason for the adsorption for cationic dyes through electrostatic interactions. The investigation of adsorption kinetics shows that the formation of coordination bonds between calcium silicate and methylene blue will also lead to further enhancement of adsorption capacity.

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Adsorption of malachite green dye over synthesized calcium silicate nanopowders from waste materials

Cited by 21 publications

References 44 publications

Removal of Hazardous Organic Dyes from Liquid Wastes Using Advanced Nanomaterials

Removal of Hazardous Organic Dyes from Liquid Wastes Using Advanced Nanomaterials

Design of silver-zinc-nickel spinel-ferrite mesoporous silica as a powerful and simply separable adsorbent for some textile dye removal

Mechanism investigation on selective adsorption of fabric loaded with calcium silicate for organic dyes

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