Abstract
This paper presents a kinetic data on the hydrometallurgical recovery of some metal ions from a printed circuit board (PCB) of a spent cell phone by hydrochloric acid leaching. The effects of acid concentration, temperature and particle diameter on the dissolution efficiency at various leaching time intervals were examined. The results of the leaching investigations showed that the powdered cell phone dissolution increases with increasing acid concentration, system temperature with decreasing particle diameter at 360 rpm. With 2M HCl solution, about 88.49% of the sample was dissolved within 120 minutes using 0.075-0.112 mm particle diameter at 800 C. The results of the study indicated that the dissolution reaction could be represented by a shrinking core model with surface chemical reaction. A value of 0.61, 60.67 kJ/mol and 12.9s-1 were calculated as reaction order, activation energy and frequency factor, respectively for the dissolution process.
Highlights
Fast development in the telecommunications industry has brought the great benefits in everyday life, but its consequences are usually ignored or even unknown
This size was retained for elemental analysis by Inductively Coupled Plasma-Mass Spectrometry (ICP-MS) using Yakogawa model HP-4500 as well as its purity assessment by Philips PW 1800 X-ray diffractometer (XRD) with CuKα (1.54A) radiation, generated at 40kV and 55mA
The XRD data revealed the presence of the following associated compounds occurring from low to trace levels are Titanium oxide fluoride [TiOF2] and Titanium-manganese silicate [TiMnSiO2]
Summary
Fast development in the telecommunications industry has brought the great benefits in everyday life, but its consequences are usually ignored or even unknown. Mobile phones are considered to be the fastest selling electronic equipment in the world. They are considered to be the fastest growing waste streams in the world and Metall. Recycling, a significant factor in the supply of many metals used in our society provides environmental benefits such as energy savings, reduced volumes of waste and reduced emissions associated with energy savings. It reduces the amount of raw materials that must be mined to support our lifestyle [2]
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