Clean technology for the recovery of silver from processed radiographic films

Syed, Shameer; Suresha, S.; Sharma, Luv; Syed, Akheel Ahmed

doi:10.1016/s0304-386x(02)00003-8

Cited by 23 publications

(10 citation statements)

References 5 publications

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“…It is valued for its resistance to corrosion and for its use in alloys and jewellery. Several processes are discussed in the literature for the recovery of silver [1,2], however its economic and environmental relevance constitutes a motivation for the development of improved methods of recovery. Several studies have been carried out using electrified liquid/liquid interfaces (interface between two immiscible electrolyte solutions (ITIES)).…”

Section: Introductionmentioning

confidence: 99%

Ag+ transfer across the water/1,2-dichloroethane interface facilitated by complex formation with tetraphenylborate derivatives

Caçote

Pereira

Tomaszewski

et al. 2004

Electrochimica Acta

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The assisted transfer of silver ion, Ag + , by complexation of Ag + with the tetrakis(4-chlorophenyl)borate (TPBCl − ) anion was studied at the interface between two immiscible electrolyte solutions (ITIES).The elucidation of the interfacial mechanisms employed the cyclic voltammetry technique applied to macro and micro liquid/liquid interfaces. This procedure allowed to identify Ag + as the species which is transferred at the liquid/liquid interface and also the formation of an 1:2 metal:ligand complex when TPBCl − is in excess. The value for the formal transfer potential of silver(I) from aqueous to 1,2-dichloroethane was evaluated and the association constant for the [Ag(TPBCl) 2 ]− complex was determined.

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Section: Introductionmentioning

confidence: 99%

Ag+ transfer across the water/1,2-dichloroethane interface facilitated by complex formation with tetraphenylborate derivatives

Caçote

Pereira

Tomaszewski

et al. 2004

Electrochimica Acta

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“…The heavy metal is present in water in variety forms, including salts and various metal complexes.

Ag {true(CN true)}_{2}^{-}

is considered as the main form of silver when it is extracted from ores and silver wastes by cyanidation . The

Ag {true(CN true)}_{2}^{-}

needs to be recovered from leachate as much as possible because of the urgent demand of silver and the high toxicity of metal‐cyanide complexes.…”

Section: Introductionmentioning

confidence: 99%

Study on quaternary ammonium modified tentacle‐type cellulose beads and its adsorption for

Zhang

Zhou

Xie

et al. 2014

J of Applied Polymer Sci

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A novel anion exchange resin based on cellulose has been prepared to adsorb Ag true(CN true)2− for the urgent demand of silver and the high toxicity of metal‐cyanide complexes. Quaternary ammonium groups were grafted onto cellulose beads as main active sites in tentacle‐type through a series of chemical reactions. The substitution degree of each reaction was determined to be about 0.854, 2.125, and 2.899 mmol g−1, respectively. The resin exhibited excellent spherical shape with microporous structure by the observation of optical microscopy and scanning electron microscope. Moreover, the adsorption experiments demonstrated the adsorption was fast in alkaline condition. Fitting the data into isotherm and kinetic models gave the conclusion that the adsorption behavior matched better with Langmuir model and pseudo‐second‐order kinetic in initial time followed pseudo‐first‐order kinetic model in later phase. The equilibrium adsorption capacity was determined to be 3.016 mmol g−1. With the advantages of high capacity, short equilibrium time, and alkaline resistance, the resin would be considered to a top‐priority adsorbent for the separation of Ag true(CN true)2−. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 40987.

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“…The silver recovery methods commonly practiced domestically and internationally include: electro-dialysis reduction [1][2][3][4], ion exchange [5], solvent extraction [6,7], bio-adsorption [8], ion flotation [9] and homogenous photo catalytic reduction [10].…”

Section: Introductionmentioning

confidence: 99%

TiO2/Ti thin-film electrode manufacturing equipment and combined external circuit photoelectrical catalytic process for reducing silver ions

Kao

Hsieh

Chang

et al. 2008

Separation and Purification Technology

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Clean technology for the recovery of silver from processed radiographic films

Cited by 23 publications

References 5 publications

Ag+ transfer across the water/1,2-dichloroethane interface facilitated by complex formation with tetraphenylborate derivatives

Ag+ transfer across the water/1,2-dichloroethane interface facilitated by complex formation with tetraphenylborate derivatives

Study on quaternary ammonium modified tentacle‐type cellulose beads and its adsorption for

TiO2/Ti thin-film electrode manufacturing equipment and combined external circuit photoelectrical catalytic process for reducing silver ions

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