Mesoporous Materials for Adsorption of Heavy Metals from Wastewater

Bensacia, Nabila; Fechete, Ioana; Boutemak, Khalida; Kettab, Ahmed

doi:10.1007/978-981-16-5916-4_8

Cited by 3 publications

(3 citation statements)

References 63 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Therefore, with the increase in the amount of GO in the composites, mesopores with consistent sizes are more likely to be formed. Mesoporous structures are preferred as adsorbents for heavy metals to obtain effective and rapid adsorption due to their accessibility to ion diffusion and metal exchange, besides possible internal and external diffusion of heavy metals (atomic radius of Pb 2+ is 0.14 nm) 30 . The BJH average pore diameter for ZGH30 was the biggest, with 13.292 nm, followed by ZH, ZGH10 and ZGH50 with 11.008, 10.831 and 9.415 nm, respectively.…”

Section: Resultsmentioning

confidence: 99%

“…Mesoporous structures are preferred as adsorbents for heavy metals to obtain effective and rapid adsorption due to their accessibility to ion diffusion and metal exchange, besides possible internal and external diffusion of heavy metals (atomic radius of Pb 2+ is 0.14 nm). 30 The BJH average pore diameter for ZGH30 was the biggest, with 13.292 nm, followed by ZH, ZGH10 and ZGH50 with 11.008, 10.831 and 9.415 nm, respectively. As ZGH30 mainly consisted of mesopores with the largest average pore diameter, the 30wt % GO used was expected to demonstrate the best performance in adsorbing Pb 2+ .…”

Section: Characterizationmentioning

confidence: 94%

See 1 more Smart Citation

Synthesis of zeolitic imidazolate framework‐8 modified graphene oxide composite and its application for lead removal

Ahmad

Salleh

Yusop

et al. 2023

J of Chemical Tech & Biotech

View full text Add to dashboard Cite

BACKGROUNDThe removal of lead ions (Pb2+) from industrial wastewater can be achieved using adsorption technology. Composites of zeolitic imidazolate framework‐8 (ZIF‐8) and graphene oxide (GO) were prepared via room temperature synthesis (RTS) using RO water as the solvent and by mixing GO with separated parts of ZIF‐8 precursors before its combination. Three weight percentages of GO, 10wt%, 30wt% and 50wt%, were used to synthesize ZGH10, ZGH30 and ZGH50 to determine optimum preparation and application conditions.ResultsZGH30 showed the most outstanding performance as an adsorbent for Pb2+ removal from aqueous solution. As captured by field emission scanning electron microscopy image, ZGH30 showed an adequate amount of ZIF‐8 grown on all surfaces of thr GO sheet, with an appropriate exposure of GO sheet layers for further Pb2+ interaction. The Pb2+ adsorption test revealed that ZGH30 obtained the optimum operating values between pH 5 and 6, using 10 mg dosage and it could remove ≤97% of 100 mg L−1 Pb2+. Additionally, ZGH30 achieved the most rapid equilibrium time within 10 min, similar to ZGH50, as compared to their individual components, ZIF‐8 (240 min) and GO (300 min). The mechanism of Pb2+ adsorption fitted well with a Langmuir isotherm and pseudo‐second‐order kinetic model. The theoretical maximum adsorption capacities obtained through Langmuir isotherm were 200, 454.55, 476.19, 555.56 and 454.55 mg g−1, for GO, ZH, ZGH10, ZGH30 and ZGH50, respectively.ConclusionsTherefore, ZGH30 hybrid successfully unleashed its potential as the adsorbent for wastewater treatment technology with improved performance after modification. © 2023 Society of Chemical Industry (SCI).

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Characterizationmentioning

confidence: 94%

Synthesis of zeolitic imidazolate framework‐8 modified graphene oxide composite and its application for lead removal

Ahmad

Salleh

Yusop

et al. 2023

J of Chemical Tech & Biotech

View full text Add to dashboard Cite

show abstract

“…Although the use of ligands that are synthesized in the human body would be indicated, they induce limitations regarding the stability and porosity of the final system [ 7 , 8 ]. Mesoporous silica materials (MSMs) are another class of porous materials that are extensively explored as catalysts [ 9 , 10 ], adsorbents for toxic substances [ 11 , 12 , 13 ] and, last but not least, have demonstrated outstanding efficiency in designing novel drug delivery systems [ 14 ]. By virtue of its well-known biocompatibility and lower costs, compared to MOFs, mesoporous silica is somehow preferred by pharmaceutical industry.…”

Section: Introductionmentioning

confidence: 99%

A Comparative Loading and Release Study of Vancomycin from a Green Mesoporous Silica

Dolete

Purcăreanu²,

Mihăiescu

et al. 2022

Molecules

View full text Add to dashboard Cite

Since its first use as a drug delivery system, mesoporous silica has proven to be a surprisingly efficient vehicle due to its porous structure. Unfortunately, most synthesis methods are based on using large amounts of surfactants, which are then removed by solvent extraction or heat treatment, leading to an undesired environmental impact because of the generated by-products. Hence, in the present study, we followed the synthesis of a silica material with a wormhole-like pore arrangement, using two FDA-approved substances as templates, namely Tween-20 and starch. As far as we know, it is the first study using the Tween-20/starch combo as a template for mesoporous silica synthesis. Furthermore, we investigated whether the obtained material using this novel synthesis had any potential in using it as a DDS. The material was further analyzed by XRD, TEM, FT-IR, N2 adsorption/desorption, and DLS to investigate its physicochemical features. Vancomycin was selected as the active molecule based on the extensive research engaged towards improving its bioavailability for oral delivery. The drug was loaded onto the material by using three different approaches, assuming its full retention in the final system. Thermal analysis confirmed the successful loading of vancomycin by all means, and pore volume significantly decreased upon loading, especially in the case of the vacuum-assisted method. All methods showed a slower release rate compared to the same amount of the pure drug. Loadings by physical mixing and solvent evaporation released the whole amount of the drug in 140 min, and the material loaded by the vacuum-assisted method released only 68.2% over the same period of time, leading us to conclude that vancomycin was adsorbed deeper inside the pores. The kinetic release of the three systems followed the Higuchi model for the samples loaded by physical mixing and vacuum-assisted procedures, while the solvent evaporation loading method was in compliance with the first-order model.

show abstract

A review on metal-organic frameworks for the removal of hazardous environmental contaminants

Jeong

Ansari

Anwer

et al. 2023

Separation and Purification Technology

View full text Add to dashboard Cite

Mesoporous Materials for Adsorption of Heavy Metals from Wastewater

Cited by 3 publications

References 63 publications

Synthesis of zeolitic imidazolate framework‐8 modified graphene oxide composite and its application for lead removal

Synthesis of zeolitic imidazolate framework‐8 modified graphene oxide composite and its application for lead removal

A Comparative Loading and Release Study of Vancomycin from a Green Mesoporous Silica

A review on metal-organic frameworks for the removal of hazardous environmental contaminants

Contact Info

Product

Resources

About