Recycling of waste cell phones

Arslan Fatma; Arslan Cüneyt

doi:10.5937/ror2501049A

Autori

Arslan Fatma Istanbul Technical University, Mining Faculty, Mineral Processing Engineering Department, Istanbul, Turkey Author
Arslan Cüneyt Istanbul Technical University, Chemical and Metallurgical Faculty, Metallurgical and Materials Engineering Department, Istanbul, Turkey Author

DOI:

https://doi.org/10.5937/ror2501049A

Ključne reči:

mobilni telefon, reciklaža, kiselinsko luženje

Apstrakt

Reciklaža donosi brojne ekološke koristi, uključujući uštedu energije, smanjenje količine otpada i smanjenje emisija povezanih sa potrošnjom energije. Mobilni telefoni su u širokoj upotrebi širom sveta. Ipak, manje od jednog procenta od milion telefona koji se svake godine povuku iz upotrebe i odbace biva reciklirano. Gotovo svi materijali koji se koriste u proizvodnji mobilnih telefona - metali, plastika, baterije i ambalaža - mogu se ponovo preraditi i reciklirati u nove proizvode. Ova studija daje pregled tehnologija reciklaže otpadnih mobilnih telefona i, kroz studiju slučaja, ispituje mogućnosti izdvajanja vrednih metala iz otpadnih telefona primenom kiselinskog luženja. Proces obuhvata demontažu otpadnih mobilnih telefona, predtretman radi razdvajanja materijala i njihovo usmeravanje ka završnim procesima obrade. U eksperimentima luženja korišćene su sumporna, azotna i hlorovodonična kiselina. U eksperimentima sa sumpornom kiselinom ispitivani su uticaji koncentracije kiseline, temperature, dodatka peroksida i vremena luženja na efikasnost rastvaranja metala. Postignute efikasnosti luženja iznosile su: 97,9 % Fe u 8 mola H2SO4, 88 % Pb, 100 % Ni, 90,4 % Co i 4,1 % Cu u rastvorima 1 mol HNO3, te 100 % Pb i 100 % Al u 4 mola HCl, sve u roku od jednog sata. Stoga se za efikasno luženje svih metala preporučuje primena sekvencijalnog procesa luženja upotrebom različitih kiselina.

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