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Removal of silver from chloride solutions using new polymer materials

Pilśniak-Rabiega Magdalena, Wolska Joanna

Physicochemical Problems of Mineral Processing

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2023

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Vol. 59, iss. 6

art. no. 174357

EN

This work presents the synthesis of polymer resins with heterocyclic functional groups, that is, N-(3-aminopropyl)-2-pipecoline, N-(3-aminopropyl)-2-pyrrolidinone, and trans-1,4-diaminocyclohexane for the recovery of Ag(I) from chloride solutions. The modification yield was 69.2, 74.6 and 88.3%, respectively. The best Ag(I) sorption was achieved from synthetic and real chloride solutions in the case of trans-1,4-diaminocyclohexane resin (sorption was 26.8 and 21.5 mg/g, respectively). The sorption kinetic data were well fitted to the pseudo-first-order kinetic model. The maximum sorption capacity of Ag(I) is 105.4, 117.8 and 130.7 mg Ag(I)/g for N-(3-aminopropyl)-2-pipecoline resin, N-(3-aminopropyl)-2-pyrrolidinone resin and trans-1,4-diaminocyclohexane resin, respectively. The trans-1,4-diaminocyclohexane modified resin was very selective towards Ag(I) compared to Cu(II), Pb(II), and Zn(II) from the real chloride leaching solution. The N-(3-aminopropyl)-2-pipecoline and N-(3-aminopropyl)-2-pyrrolidinone resins showed high preferences for Ag(I) over Pb(II) in real solution. These results indicated that the polymers can be applied in the recovery of Ag(I).

2

Silver(I) recovery on thiomorpholine - modified functional polymer

Pilśniak-Rabiega Magdalena, Wolska Joanna

Physicochemical Problems of Mineral Processing

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2022

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Vol. 58, iss. 6

art. no. 156609

EN

The functional polymer containing heterocyclic ligands was synthesized by microwave modification of a crosslinked poly(vinylbenzyl chloride–divinylbenzene) matrix with thiomorpholine. The modification yield was 89.3%. The sorbent was used to recover Ag(I) from the synthetic and real chloride solutions. The maximum sorption capacity of Ag(I) was approximately 180 mg Ag/g. The sorption kinetic data were well-fitted to the pseudo-first-order kinetic model. The degree of silver desorption was approximately 50.0% using a 1.0% potassium cyanide solution in a 0.50% hydrogen peroxide solution. The resin retained its capacity toward Ag(I) in five consecutive sorption/desorption cycles. The thiomorpholine modified resin was highly selective toward Ag(I) in relation to Cu(II), Pb(II), Co(II), Ni(II), and Zn(II) from the real chloride leaching solution.

3

Novel functional polymers for recovery of silver

Pilśniak-Rabiega Magdalena, Wolska Joanna

Physicochemical Problems of Mineral Processing

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2021

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Vol. 57, iss. 6

36--54

EN

In this study, the functional polymers containing heterocyclic ligands were synthesized by microwave modification of a crosslinked poly(vinylbenzyl chloride–divinylbenzene) matrix with 4-tertbutylpyridine, pyrrolidine, and 3-morpholinopropylamine. The sorbents were used to recover Ag(I) from the synthetic and real chloride solutions (4.00 mol/dm3 of NaCl, 0.100 mol/dm3 of HCl). The best Ag(I) sorption was achieved from synthetic and real chloride solutions in the case of pyrrolidine resin (16.2 and 16.7 mg/g, respectively). The sorption kinetic data were well fitted to the pseudo-first-order kinetic model. The degree of silver desorption was approximately 90% using a 1.0% potassium cyanide solution in a 0.50% hydrogen peroxide solution. All resins showed good selectivity for Ag(I) compared to Cu(II), Pb(II), Co(II), Ni(II), and Zn(II) in real chloride solution. On the basis of this study, it can be concluded that the obtained sorbents can be used to recover Ag from various sources such as ores, wastewater, and jewelry scraps.

4

Polimery oraz makrocząsteczki posiadające podstawnik pentafluorosulfanylowy, -SF5 : synteza, struktura, właściwości i zastosowanie

Wolska Joanna, Siodła Tomasz, Walkowiak-Kulikowska Justyna

Wiadomości Chemiczne

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2020

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[Z] 74, 3-4

231--254

EN

The pentafluorosulfanyl (-SF5) moiety is a lesser known and underutilized functional group that displays high electronegativity, chemical and thermal stability, and low surface energy, among other useful properties. As a substituent it is known for almost 60 years, however practical application of the unique -SF5 group in various areas of chemistry has only recently picked up, mostly due to longstanding challenges associated with its synthetic accessibility. Most of the latest attention involving the use of -SF5 has been in medicinal chemistry, but it has also started to feature much more frequently in functional materials design, especially in the area of optoelectronic materials. This review will describe polymers and macromolecules containing -SF5 substituent which has been introduced mainly at the monomer stage.

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Silver(I) recovery on sulfur-containing polymeric sorbents from chloride solutions

Pilśniak-Rabiega Magdalena, Wolska Joanna

Physicochemical Problems of Mineral Processing

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2020

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Vol. 56, iss. 6

290--310

EN

This work describes the preparation of functional polymers containing 2-mercapto-1-methylimidazole and guanylthiourea ligands from chemically modified vinylbenzyl chloride/divinylbenzene copolymer (VBC/DVB). The resins were used for the removal of Ag(I) from synthetic and real chloride solutions. The 2-mercapto-1-methylimidazole resin was highly selective towards Ag(I) in relation to Pb(II) from real chloride leaching solution. The resins were selective for Ag(I) from real chloride solution and they did not sorb chloride complexes of Co(II), Ni(II) and Zn(II). The sorption kinetic data were well fitted to the pseudo-first-order kinetic model. The degree of Ag(I) desorption was about 80% using 1% potassium cyanide solution in 0.5% hydrogen peroxide solution. Resins retain their capacity towards Ag(I) in five consecutive sorption/desorption cycles.