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NaOH-Mediated Precipitation of Cu(OH)2 from Recycled SIM Card Leachate

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Abstract:

The exponential growth of electronic waste (e-waste), particularly from discarded SIM cards, has raised significant environmental concerns due to the presence of valuable metals such as copper (Cu). This study investigates the recovery of copper from SIM card waste through hydrometallurgical methods, focusing on the effects of pH and reaction time on the precipitation of Cu(OH)2. The SIM card waste was leached using nitric acid, followed by copper precipitation through the addition of sodium hydroxide at various pH levels (11, 12, 13, and 14). The solid precipitates were analyzed using Scanning Electron Microscopy (SEM) and Fourier Transform Infrared Spectroscopy (FTIR) to determine their morphology and functional group composition. The results indicate that optimal conditions for copper precipitation were achieved at a pH of 11, yielding the highest purity and the lowest Cu concentration in the filtrate. SEM analysis revealed that Cu(OH)2 particles formed distinct crystal structures that varied with pH, while FTIR confirmed the presence of Cu-OH functional groups, indicating successful copper recovery. This study highlights the potential of hydrometallurgical processes for environmentally friendly copper recovery from e-waste, providing insights into optimizing industrial-scale applications.

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Periodical:

Advanced Materials Research (Volume 1188)

Pages:

81-86

DOI:

https://doi.org/10.4028/p-I6i9uD

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Online since:

February 2026

Authors:

Luthfia Ummul Fadhilah, Himmah Sekar Eka Ayu Gustiana*, Nadiyah Zalfa

Keywords:

Copper Hydroxide, E-Waste, Precipitation

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© 2026 Trans Tech Publications Ltd. All Rights Reserved

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