Synthesis of a new pyrimidine-based sorbent for indium(III) removal from aqueous solutions – Application to ore leachate

Hamza, Mohammed F.; El-Hamid, Abd Allh M. Abd; Guibal, Eric; Abdel‐Rahman, Adel A.‐H.; ARABY, Rania El

doi:10.1016/j.seppur.2023.123514

Cited by 10 publications

(2 citation statements)

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“…The new N 1 s peaks at 405.68 eV are contributed by Ru–NO 3 − . In the NaNO 2 -HNO 3 system, the peaks of C–N, C=N, and Ru-NO 3 − shifted after adsorption; furthermore, a new peak at 403.38 eV corresponds to M (Ru, Na)–NO 2 , proving the complexations of Ru and nitrite are adsorbed on the SiPyR-N3 [ 32 , 33 , 34 , 35 , 36 , 37 ].…”

Section: Resultsmentioning

confidence: 99%

Adsorption and Desorption Behavior and Mechanism of Ruthenium in Nitrite–Nitric Acid System

Li,

Xie,

Jiang

et al. 2024

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Ruthenium is required to separate from high-level liquid waste (HLLW) because Ru is a valuable resource and is negatively influential on the vitrification process of HLLW. However, the separation of Ru is very challenging due to its complicated complexation properties. In this study, the adsorption and desorption characteristics of ruthenium on a synthesized SiPyR-N3 (weak-base anion exchange resin with pyridine functional groups) composite were investigated in nitric acid and nitrite–nitric acid systems, respectively, and the adsorption mechanism was explored. The experimental results showed that SiPyR-N3 has a significantly better adsorption effect on Ru in the nitrite–nitric acid system than in the nitric acid system, with an increase in the adsorption capacity of approximately three times. The maximum adsorption capacity of Ru is 45.6 mg/g in the nitrite–nitric acid system. The SiPyR-N3 possesses good adsorption selectivity (SFRu/other metal ions is around 100) in 0.1 M NO2−–0.1 M HNO3 solution. The adsorption processes of Ru in the two different systems are fitted with the pseudo-second-order kinetic model and Langmuir model for uptake kinetics and adsorption isotherms, respectively. The results obtained from the FT-IR, XPS, and UV absorption spectrometry indicate that NO2− was involved in the adsorption process either as a complexing species with the metal ions or as free NO2− from the solution. A 0.1 M HNO3 + 1 M thiourea mixed solution shows effective desorption performance, and the desorption efficiency can reach 92% at 328 K.

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Section: Resultsmentioning

confidence: 99%

Adsorption and Desorption Behavior and Mechanism of Ruthenium in Nitrite–Nitric Acid System

Li,

Xie,

Jiang

et al. 2024

Toxics

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“…It is also obtained through the electrolysis of the process residues, which is preceded by a series of steps aimed at removing or masking the elements present in the solution (cadmium, copper, iron, aluminum, germanium, and others). Depending on the method used, these stages may include, among others: leaching, precipitation, filtration, acidification, ion exchange, or extraction [18][19][20]. On a smaller scale, gallium is also obtained from coal ashes [7].…”

Section: Primary and Secondary Sources Of Gallium And Indiummentioning

confidence: 99%

A Review on the Recovery and Separation of Gallium and Indium from Waste

Kluczka

2024

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Gallium and indium are crucial metals in various industries, such as the medical and telecommunication industries. They can find applications as pure metals, alloys and alloy admixtures, oxides, organometallic compounds, and compounds with elements such as nitrogen or arsenic. Recovery of these two metals from waste is an important issue for two main reasons. First, gallium and indium are scattered in the Earth’s crust and their minerals are too rare to serve as a primary source. Second, e-waste contributes to the rapidly growing problem of Earth littering, as its amount increased significantly in recent years. Therefore, it is essential to develop and implement procedures that will enable the recovery of valuable elements from waste and limit the emission of harmful substances into the environment. This paper discusses technological operations and methods that are currently used or may be used to produce pure gallium and indium or their oxides from waste. The first step was described—waste pretreatment, including disassembly and sorting in several stages. Then, mechanical treatment as well as physical, chemical, and physicochemical separations were discussed. The greatest emphasis was placed on the hydrometallurgical methods of gallium and indium recovery, to be more precise on the extraction and various sorption methods following the leaching stage. Methods of obtaining pure metals or metal oxides and their refining processes were also mentioned.

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