Extraction of precious metals from industrial solutions by the pine (Pinus sylvestris) sawdust-based biosorbent modified with thiourea groups

Описание

Тип публикации: статья из журнала

Год издания: 2018

Идентификатор DOI: 10.1016/j.hydromet.2018.01.016

Ключевые слова: Adsorption, Biosorbents, Precious metals

Аннотация: A novel biosorbent based on pine (Pinus sylvestris) sawdust with chemical grafted thiourea groups was proposed for preconcentration of precious metals. A simple procedure was proposed for the synthesis of biosorbent by treating of sawdust with ammonium thiocyanate solution and a subsequent heat treatment at 160 °C. The biosorbent hПоказать полностьюas been studied by thermogravimetry/differential scanning calorimetry (TGA/DSC), scanning electron microscopy (SEM), and Fourier transform infrared spectroscopy (FT-IR). The adsorption properties for precious metals ions (Au3+, Pd2+, Pt2+, Pt4+, Ir4+, Rh3+, Ru4+) extraction have been studied. Biosorbent quantitatively extracted precious metals from dilute solutions of hydrochloric acid (0.5–4.0 M). Iron and non-ferrous metals were not extracted in these conditions. The adsorbent showed high adsorption capacity for precious metals: 0.4 (Au3+), 1.7 (Pd2+), 1.0 (Pt2+), 0.8 (Pt4+), 0.45 (Ru4+), 0.55 (Rh3+), 0.4 (Ir4+) mmol/g. Biosorbent was used for extraction and preconcentration of precious metals from industrial solutions of refinery. Enriched for precious metals desorbing solution was obtained as a result. It is possible to obtain precious metals powder by combustion of biosorbent after adsorption of precious metals. © 2018

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Издание

Журнал: Hydrometallurgy

Выпуск журнала: Vol. 176

Номера страниц: 118-128

ISSN журнала: 0304386X

Издатель: Elsevier B.V.

Авторы

  • Losev V.N. (Siberian Fed Univ, Sci Res Engn Ctr Kristall, Pr Svobodnyi 79, Krasnoyarsk 660041, Russia)
  • Elsufiev E.V. (Siberian Fed Univ, Sci Res Engn Ctr Kristall, Pr Svobodnyi 79, Krasnoyarsk 660041, Russia)
  • Buyko O.V. (Siberian Fed Univ, Sci Res Engn Ctr Kristall, Pr Svobodnyi 79, Krasnoyarsk 660041, Russia)
  • Trofimchuk A.K. (Taras Shevchenko Natl Univ Kyiv, Ul Vladimirskaya 64, UA-01033 Kiev, Ukraine)
  • Horda R.V. (Taras Shevchenko Natl Univ Kyiv, Ul Vladimirskaya 64, UA-01033 Kiev, Ukraine)
  • Legenchuk O.V. (Taras Shevchenko Natl Univ Kyiv, Ul Vladimirskaya 64, UA-01033 Kiev, Ukraine)

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