Abstract
AbstractThe objective of this work was to quantify the leaching of nine heavy metals from four desktop personal computer components (PCCs), namely, integrated drive electronics (IDE) cables, video cards, random-access memory (RAM), and CPUs, using two different leaching tests. One test was the toxicity characteristic leaching procedure (TCLP), which is widely used in the United States. The TCLP was augmented using a five-step sequential leaching procedure to further investigate the influence of increasing liquid-to-solid (L/S) ratios on the amount of metals leached. The other leaching test was based on European standards following the requirements of a European decision regarding acceptance of waste at landfills. The European leaching test was performed at the natural pH of the materials. Results showed that the masses of some metals leached during the TCLP were up to two orders of magnitude greater than the corresponding masses measured by the European leaching test. Lead and zinc were the dominant metal...
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