Peculiarities of u(vi) adsorption from acidic solution using chitin-derived chitosan as a low-priced bio-adsorbent

El-Rahem, Khaled A. Abd; Taher, M. A.; Cheira, Mohamed F.

doi:10.21608/absb.2021.79764.1121

Cited by 4 publications

(2 citation statements)

References 40 publications

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“…The distinctive peak at 1593 cm −1 was related to the C=C of PVC. The peak at 1425 cm −1 belonged to C=S, while peaks at 1194 cm −1 and 1058 cm −1 fitted with the stretching C-N group [ 37 ]. Moreover, the peaks at 752 and 690 cm −1 were related to the C=S and C-S groups [ 38 ].…”

Section: Resultsmentioning

confidence: 99%

Rare Earth Group Separation after Extraction Using Sodium Diethyldithiocarbamate/Polyvinyl Chloride from Lamprophyre Dykes Leachate

et al. 2022

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This study presents the first application of sodium diethyldithiocarbamate/polyvinyl chloride (DdTC/PVC) as a novel adsorbent for rare earth element (REE) sorption from leach liquors. DdTC/PVC has higher adsorption properties than other sorbents, the synthesis of DdTC/PVC is more accessible than other resins, and it is considered a more affordable sorbent. The three-liquid-phase extraction technique (TLPE) was applied to separate REEs into light, middle, and heavy rare earth elements as groups. The TLPE is an excellent achievable technique in the separation of REEs. DdTC/PVC was prepared as a sorbent to sorb rare-earth ions in chloride solution. It was described by XRD, SEM, TGA, and FTIR. The factors pH, initial rare-earth ion concentration, contact time, and DdTC/PVC dose were also analyzed. The ideal pH was 5.5, and the ideal equilibration time was found to be 45 min. The rare-earth ion uptake on DdTC/PVC was 156.2 mg/g. The rare-earth ion sorption on DdTC/PVC was fitted to Langmuir and pseudo-2nd-order models. The rare-earth ions’ thermodynamic adsorption was spontaneous and exothermic. In addition, rare-earth ion desorption from the loaded DdTC/PVC was scrutinized using 1 M HCl, 45 min time of contact, and a 1:60 S:L phase ratio. The obtained rare earth oxalate concentrate was utilized after dissolving it in HCl to extract and separate the RE ions into three groups—light (La, Ce, Nd, and Sm), middle (Gd, Ho, and Er), and heavy (Yb, Lu, and Y)—via three-liquid-phase extraction (TLPE). This technique is simple and suitable for extracting REEs.

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Section: Resultsmentioning

confidence: 99%

Rare Earth Group Separation after Extraction Using Sodium Diethyldithiocarbamate/Polyvinyl Chloride from Lamprophyre Dykes Leachate

et al. 2022

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“…Hence, the uranium uptake realized maximum sorption at pH 4.0. Alternatively, at pH > 4.0, uptake progressively decreased, owing to the precipitation of uranyl hydroxide species [65]. For that reason, it was not necessary to examine the effect of pH 6.0.…”

Section: Ph Influencementioning

confidence: 99%

Sustainable Remedy Waste to Generate SiO2 Functionalized on Graphene Oxide for Removal of U(VI) Ions

et al. 2022

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The Hummer process is applied to generate graphene oxide from carbon stocks’ discharged Zn-C batteries waste. SiO2 is produced from rice husks through the wet process. Subsequently, SiO2 reacted with graphene oxide to form silica/graphene oxide (SiO2/GO) as a sorbent material. XRD, BET, SEM, EDX, and FTIR were employed to characterize SiO2/GO. Factors affecting U(VI) sorption on SiO2/GO, including pH, sorption time, a dosage of SiO2/GO, U(VI) ions’ concentration, and temperature, were considered. The experimental data consequences indicated that the uptake capacity of SiO2/GO towards U(VI) is 145.0 mg/g at a pH value of 4.0. The kinetic calculations match the pseudo second-order model quite well. Moreover, the sorption isotherm is consistent with the Langmuir model. The sorption procedures occur spontaneously and randomly, as well as exothermically. Moreover, SiO2/GO has essentially regenerated with a 0.8 M H2SO4 and 1:50 S:L phase ratio after 60 min of agitation time. Lastly, the sorption and elution were employed in seven cycles to check the persistent usage of SiO2/GO.

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

Eissa,

Sakr,

Hanfi

et al. 2023

Chemosphere

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Peculiarities of u(vi) adsorption from acidic solution using chitin-derived chitosan as a low-priced bio-adsorbent

Cited by 4 publications

References 40 publications

Rare Earth Group Separation after Extraction Using Sodium Diethyldithiocarbamate/Polyvinyl Chloride from Lamprophyre Dykes Leachate

Rare Earth Group Separation after Extraction Using Sodium Diethyldithiocarbamate/Polyvinyl Chloride from Lamprophyre Dykes Leachate

Sustainable Remedy Waste to Generate SiO2 Functionalized on Graphene Oxide for Removal of U(VI) Ions

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

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