Silver recovery from spent photographic solutions by a magnetically assisted particle bed

Petrova, Tanya; Tzaneva, B. R.; Fachikov, L.; Hristov, Jordan

doi:10.1016/j.cep.2013.03.014

Cited by 19 publications

(6 citation statements)

References 47 publications

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“…According to the precious metals ions, their recovery traditionally was carried out by chemical precipitation; however, the process showed some disadvantages like the formation of toxic subproducts which avoid a complete recovery of the precious metals such as Ag and Au [11]. For the abovementioned, some processes of ion exchange have been developed, using resins and activated carbon, interchanging Ag and Au ions contained in residues or dissolved solutions from cyaniding [12].…”

Section: Introductionmentioning

confidence: 99%

Use of Porous no Metallic Minerals to Remove Heavy Metals, Precious Metals and Rare Earths, by Cationic Exchange

Hernández-Ávila¹,

Serrano-Mejía²,

Salinas‐Rodríguez³

et al. 2021

Trace Metals in the Environment - New Approaches and Recent Advances

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This chapter is related with the preliminary study of some non-metallic minerals to evaluate their cationic exchange capacity, to remove heavy and precious metals, as well as rare earths elements. The minerals and materials used to execute the ion metals removal were bentonite, phosphorite, and diatomite. The chapter shows the physicochemical behavior of all these minerals, which were used to remove the mentioned elements from solutions coming from ore leaching. It was found that in all cases, the removal of heavy and precious metals, as well as rare earths elements reached over 90%. Although, there were minimal differences in efficiency for all minerals used (bentonite, phosphorite, and diatomite), it could be pointed that the phosphorite has the best results going from 99.43% of removal of Gd, to 99.95-100% for the case of Ce,

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Section: Introductionmentioning

confidence: 99%

Use of Porous no Metallic Minerals to Remove Heavy Metals, Precious Metals and Rare Earths, by Cationic Exchange

Hernández-Ávila¹,

Serrano-Mejía²,

Salinas‐Rodríguez³

et al. 2021

Trace Metals in the Environment - New Approaches and Recent Advances

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“…Materials including magnetite have been studied from a chemistry perspective for their preparation [8,9] and applications [10]. A macroscopic magnetite assembly has been used as a filter medium for the separation of several particles and subsequent recovery by the application of a magnetic field [11,12]. Here, a column packed with a magnetite-containing gel was used to separate industrial silica particles prepared by a dry process.…”

Section: Introductionmentioning

confidence: 99%

Size Separation of Silica Particles Using a Magnetite-Containing Gel-Packed Column

et al. 2019

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A magnetite-containing gel was prepared by water-in-oil radical polymerization of N,N-dimethylacrylamide and N,N’-methylenebisacrylamide in the presence of magnetite. The size of the prepared gel particles was 86 µm. The obtained magnetite-containing gel was packed in a column and first permeated with water, which revealed that the gel displayed a nonlinear response to pressure drop with increasing flow rate. Thus, the gel particles at the bottom of the column felt more pressure from the fluid than those at the top, causing greater deformation of the gel particles at the bottom of the column than at the top. The gaps between the packed gel particles functioned as pores to filter particles of appropriate size and morphology. An industrial silica particle suspension with particle sizes of 300 nm, 800 nm, and 10 µm was permeated through the gel layer. The smallest (300 nm) silica particles passed through the column. The filtered silica particles were recovered from the gel layer by using a magnet to separate the magnetite-containing gel from the filtered silica particles. This magnetite-containing gel has wide application prospects for the separation of not only ceramics but also other colloids.

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“…The small-scale noble metal nanoclusters (NCs), typically consisting of a small number of metal atoms with sizes smaller than 2 nm, have attracted wide attention not only due to their unique physical and chemical properties between metal atoms and large nanoparticles [1][2][3][4] but for their broad range of applications in many elds such as labeling, 5 catalysis, 6 antibacterial agents, 7 bioimaging, 8 and sensing [9][10][11][12] etc. Silver nanoclusters (AgNCs), as the most frequently studied cheapest noble metal NCs, 13 have been one of the focal studies in the past years owing to the different characteristics of silver metal, including photography, [14][15][16] catalysis, 17 intense plasmon absorption band in visible-light region, 18 surface enhanced Raman spectroscopy, [19][20][21] and the antibacterial properties known to all, 22 etc. By far, a large number of research works from many laboratories have been reported on the synthesis and application of AgNCs.…”

Section: Introductionmentioning

confidence: 99%

Aggregation, dissolution and cyclic regeneration of Ag nanoclusters based on pH-induced conformational changes of polyethyleneimine template in aqueous solutions

Dong

Qü

et al. 2015

RSC Adv.

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Silver recovery from spent photographic solutions by a magnetically assisted particle bed

Cited by 19 publications

References 47 publications

Use of Porous no Metallic Minerals to Remove Heavy Metals, Precious Metals and Rare Earths, by Cationic Exchange

Use of Porous no Metallic Minerals to Remove Heavy Metals, Precious Metals and Rare Earths, by Cationic Exchange

Size Separation of Silica Particles Using a Magnetite-Containing Gel-Packed Column

Aggregation, dissolution and cyclic regeneration of Ag nanoclusters based on pH-induced conformational changes of polyethyleneimine template in aqueous solutions

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