Izlaganje sa skupa
Recovery of noble metals by the use of functional adsorber textiles
Klaus Opwis
; Deutsches Textilforschungszentrum Nord-West gGmbH, Krefeld, Njemačka
Thomas Mayer-Gall
; Deutsches Textilforschungszentrum Nord-West gGmbH, Krefeld, Njemačka
Jochen Stefan Gutmann
; Deutsches Textilforschungszentrum Nord-West gGmbH, Krefeld, Njemačka
Sažetak
The recycling and recovery of high-prized noble metals such as platinum, gold, palladium and silver or rare and strategic metals like indium, gallium, and rare earth metals from scrap metals and wastewaters will be from steadily increasing importance within the next years. Therefore, the focus has to be set on the detection of potentially usable secondary resources and the development of inexpensive and energy-saving processes to separate and recover the metals selectively (urban mining). Beside electronic scrap industrial process and wastewaters represent a considerable source for noble metals. Recently, we have successfully developed an innovative metal-adsorbing textile filter material based on polyvinylamine-coated polyester fibers. The surface modification of the fibrous material is easy to realize with common methods in textile finishing yielding a durable, high-performing and even cheap adsorbent for water-dissolved metal ions. We present results on the general textile finishing procedure and the pH-depending adsorption of noble metal ions. The feasibility of the overall process is demonstrated on palladium containing process waters obtained from a German producer of curcuit boards. Moreover, the same innovative adsorber material is useful for the decontamination of chromate-polluted ground waters and soils. Our latest investigations focus their use in the selective recovery of rare earth metals from large-scale FCC catalyst production for the petroleum refining industry.
Ključne riječi
textile; polyelectrolyte; metal recovery; urban mining; textile mining
Hrčak ID:
186568
URI
Datum izdavanja:
20.2.2017.
Posjeta: 1.764 *