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2018, vol. 54, br. 3, str. 377-384
Dobijanje cink oksida iz opasnog otpada - pene amonijum hlorida
Technical University of Kosice, Faculty of Materials, Metallurgy and Recycling, Institute of Recycling Technologies, Kosice, Slovak Republic

e-adresadusan.orac@tuke.sk
Projekat:
This work was fully supported by Ministry ofEducation of the Slovak Republic under Grant VEGANo 1/0442/17 project and VEGA No 1/0724/17project.

Ključne reči: pena amonijum hlorida; cink; luženje; taloženje; cink oksid
Sažetak
Ovaj rad se bavi hidrometalurškim postupkom sa naknadnim taloženjem cinka iz opasnog otpada, odnosno pene amonijum hlorida nastale tokom postupka toplog cinkovanja u vlažnim uslovima. Hemijska analiza je pokazala da pena sadrži 46,64% cinka. Rentgenskom difrakcijom je ustanovljeno postojanje dve faze u peni amonijum hidroksida, faza Zn(OH)Cl (96.36%) kao i faza NH4Cl (3.64%). Pena je najpre lužena da bi se izdvojio cink u rastvoru HCl, da bi nakon toga došlo do taloženja cinka. Eksperimenti su izvedeni u prisustvu HCl, pri koncentracijama 0,25, 0,5, 1 i 2M. Potpuno razlaganje cinka je postignuto u rastvoru HCl koncentracije 0,5M, na 40°C, u odnosu T:Č=20, u periodu od maksimalno 30 min. Dobijena energija aktivacije reakcije luženja u prisustvu hlorovodonične kiseline iznosila je Ea=5.543 kJ mol-1. Taloženje cinka je postignuto u prisustvu Na2CO3 i NaOH. Cink oksid, čistoće 99%, dobijen je direktno iz rastvora 6M NaOH na temperaturi od 60°C - 80°C pri pH vrednosti 8,8.
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O članku

jezik rada: engleski
vrsta rada: izvorni naučni članak
DOI: 10.2298/JMMB180621027P
objavljen u SCIndeksu: 24.01.2019.
metod recenzije: jednostruko anoniman
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