Physicochemical investigation of mercury sorption on mesoporous thioacetamide/chitosan from wastewater

Eissa, Mohamed E.; Sakr, Ahmed K.; Hanfi, Mohamed Y.; Sayyed, M.I.; Al‐Otaibi, Jamelah S.; Abdel-lateef, Ashraf M.; Cheira, Mohamed F.; Abdelmonem, Haeam A.

doi:10.1016/j.chemosphere.2023.140062

Cited by 17 publications

(7 citation statements)

References 56 publications

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“…Therefore, it is difficult to evaluate different sorbents in a relevant way. As an indication, the Q max values for Hg (II) removal for different sorbents functionalized with sulfur moieties are given in Table 3, and compared to the literature, [56][57][58][59][60] competitive maximum adsorption capacities were obtained in this work.…”

Section: Comparison With Further Sorbentsmentioning

confidence: 66%

Thiourea Adsorbent for Efficient Removal of Mercury (II)

El Khoueiry,

Giusti,

Lelong

et al. 2023

ChemistrySelect

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The removal of heavy toxic metals from industrial effluents is extremely important, especially for mercury (Hg), which is classified as a highly toxic even at low concentrations. For this purpose, novel thiourea chelating resins were synthesized as sorbent for Hg (II). Six different polymers of formo‐phenolic types were characterized and evaluated for their chelating properties with respect to Hg (II) extraction. Batch adsorption studies of mercury (II) as a function of pH, initial metal ion concentration, temperature, and time showed that thiourea formo‐phenolic polymers have a good affinity for Hg removal and a high adsorption capacity. Adsorption isotherms (Langmuir and Freundlich) and kinetic models (pseudo‐first and pseudo‐second order) were used to interpret the sorption behavior of the materials. The Langmuir model yielded the best fit with a maximum adsorption capacity of 300 mg/g. Desorption studies were performed with aqueous thiourea solution and showed that the adsorbent is indeed regenerable and can be effectively used for up to three adsorption‐desorption cycles with negligible loss of performance. This study confirmed the potential of thiol‐modified formo‐phenolic resins in sorbent engineering with promising applications in the remediation of mercury‐contaminated water.

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Section: Comparison With Further Sorbentsmentioning

confidence: 66%

Thiourea Adsorbent for Efficient Removal of Mercury (II)

El Khoueiry,

Giusti,

Lelong

et al. 2023

ChemistrySelect

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“…Furthermore, we examined the adsorption performance at different temperatures and found that it increased with increasing temperature. 26 Based on correlation coefficient (R 2 ), monolayer adsorption described by the Langmuir model provided better fitting than Freundlich and Temkin models at temperatures of 25, 35, and 45 °C for immobilizing U(VI) onto PN-300 nanotubes. 27 The adsorption kinetics of PN-300 nanotubes onto uranium were also determined in aqueous solutions with different concentrations of uranium.…”

Section: Resultsmentioning

confidence: 99%

“…According to the Langmuir model, the theoretical maximum adsorption capacity was determined as 540.54 mg g –1 , and the corresponding parameters are listed in Table S1. Furthermore, we examined the adsorption performance at different temperatures and found that it increased with increasing temperature . Based on correlation coefficient ( R 2 ), monolayer adsorption described by the Langmuir model provided better fitting than Freundlich and Temkin models at temperatures of 25, 35, and 45 °C for immobilizing U(VI) onto PN-300 nanotubes …”

Section: Resultsmentioning

confidence: 99%

Phosphorus Nitride Imide Nanotubes for Uranium Capture from Seawater

Zhao,

Wang,

Wang

et al. 2024

ACS Nano

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Nuclear power plays a pivotal role in the global energy supply. The adsorption-based extraction of uranium from seawater is crucial for the rapid advancement of nuclear power. The phosphorus nitride imide (PN) nanotubes were synthesized in this study using a solvothermal method, resulting in chemically stable cross-linked tubular hollow structures that draw inspiration from the intricate snowflake fractal pattern. Detailed characterization showed that these nanotubes possess a uniformly distributed five-coordinated nanopocket, which exhibited great selectivity and efficiency in binding uranium. PN nanotubes captured 97.34% uranium from the low U-spiked natural seawater (∼355 μg L −1 ) and showed a high adsorption capacity (435.58 mg g −1 ), along with a distribution coefficient, K d U > 8.71 × 10 7 mL g −1 . In addition, PN nanotubes showed a high adsorption capacity of 7.01 mg g −1 in natural seawater. The facile and scalable production of PN nanotubes presented in this study holds implications for advancing their large-scale implementation in the selective extraction of uranium from seawater.

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“…The latter ones are especially interesting due to their unique properties: large surface area, which can be easily chemically changed for efficient and selective Pt removal; thermal conductivity; chemical stability; excellent electrical conductivity and availability. Among carbon materials, the biochars are more and more popular because they possess the advantages of carbonaceous materials and their production can be determined as upcycling the biowaste feedstocks [ 6 , 7 , 8 , 9 , 10 ].…”

Section: Introductionmentioning

confidence: 99%

Optimization of Pt(II) and Pt(IV) Adsorption from a Water Solution on Biochar Originating from Honeycomb Biomass

Morlo,

Olchowski,

Dobrowolski

2024

Molecules

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Novel CO2- and H3PO4-modified biochars were successfully synthesized from raw honeycomb biomass. They were characterized via several instrumental techniques. The optimal Pt(II) and Pt(IV) adsorption onto the studied biochars was reached for the initial pH of 1.5 and a contact time of 5 min (Pt(II)) and 24–48 h (Pt(IV)). The highest static adsorption capacities for Pt(II) and Pt(IV) were obtained for the H3PO4-modified biochar: 47 mg g−1 and 35 mg g−1, respectively. The Freundlich model described the Pt(II) adsorption isotherms onto both materials and the Pt(IV) adsorption isotherm onto the CO2-activated material, and the Langmuir model was the best fitted to the Pt(IV) adsorption isotherm onto the H3PO4-activated biochar. The best medium for the quantitative desorption of the Pt form from the H3PO4-modified biochar was 1 mol L−1 thiourea in 1 mol L−1 HCl. The adsorption mechanism of both the studied ions onto the synthesized H3PO4-modified biochar was complex and should be further investigated. The H3PO4-modified biochar was successfully applied for the first time for Pt(IV) removal from a spent automotive catalyst leaching solution.

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Physicochemical investigation of mercury sorption on mesoporous thioacetamide/chitosan from wastewater

Cited by 17 publications

References 56 publications

Thiourea Adsorbent for Efficient Removal of Mercury (II)

Thiourea Adsorbent for Efficient Removal of Mercury (II)

Phosphorus Nitride Imide Nanotubes for Uranium Capture from Seawater

Optimization of Pt(II) and Pt(IV) Adsorption from a Water Solution on Biochar Originating from Honeycomb Biomass

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