Recycling of Electronic Waste, Using Basic and Acid Leaching

Abstract

This recycling of printed circuit board (TCI) for the production of metals, given the environmental degradation that can cause toxic substances of these, is the reuse of valuable materials recovered from the TCI, this being an economic engine that promotes the recycling of this waste. This paper presents a methodology for evaluating the reaction kinetics and leaching of metals that form the metal substrate, which have environmental and energy advantages, so the generation of new recovery techniques metals from the TCI low environmental and energy impact is increasingly necessary, for it is essential to establish the parameters affecting the reaction rate and identify design alternatives to determine whether or not sustainable, economically viable and that does not pollute. The method adopted was a leaching acid samples, where the full factorial method employed two experimental levels to evaluate the influence of: leaching time, temperature of the aqueous leach solution, reaction kinetics and solid/liquid, on the percentage of metal extraction. Subsequently, the metals are obtained by calcining and smelting the resulting salts by addition of acid liquor.

The impact of ignorance and bias on information security protection motivation: a case of e-waste handling

“…Unencrypted and sensitive documents belonging to a US government contractor were discovered in a discarded computer for sale at a low price in Ghanaian junk markets (Robert, 2009). The foremost concern is the utilization of confidential information by unauthorized organizations when these e-wastes are exported to other countries for disposal (Orts and Spigonardo, 2016). For example, an Australian institution (National Association for Information Destruction) completed an investigation in 2014: experimenters randomly purchased 52 recycled computers from the online marketplace eBay and discovered that 30% of the hard disks contained highly confidential information, such as individual bank account usernames and passwords, client email address lists and communications sourced from (among others) law firms, medical facilities and a community center.…”