E-waste is discarded electronic equipment such as phones, laptops, chargers, tablets, and circuit boards. It matters because electronics contain valuable materials like copper, gold, aluminum, and rare earth elements, but they can also contain hazardous substances such as lead and mercury. Recycling e-waste keeps toxic materials out of soil and water while reducing the need to mine new raw materials.
Good e-waste management also saves energy and supports safer, cleaner technology use.
Key Facts
- E-waste includes discarded phones, computers, tablets, printers, cables, batteries, and circuit boards.
- Mass recovered = starting mass x recovery rate. For example, 100 kg x 0.80 = 80 kg recovered.
- Magnets separate ferrous metals such as iron and steel from shredded e-waste.
- Copper, gold, silver, aluminum, plastics, and rare earth elements can be recovered from electronics.
- Hazardous parts such as lead solder, mercury-containing components, and some batteries need special handling.
- Reduce, repair, reuse, then recycle is the best order for managing electronics.
Vocabulary
- E-waste
- E-waste is unwanted or discarded electronic equipment and its parts.
- Shredding
- Shredding is the process of breaking electronic devices into smaller pieces so materials can be separated.
- Magnetic separation
- Magnetic separation uses magnets to pull iron and steel away from other materials.
- Rare earth elements
- Rare earth elements are a group of metals used in electronics, magnets, screens, batteries, and speakers.
- Right-to-repair
- Right-to-repair is the idea that people should be able to fix their devices using available parts, tools, and repair information.
Common Mistakes to Avoid
- Throwing electronics in the regular trash: this is wrong because hazardous materials can leak into the environment and valuable metals are lost.
- Assuming all recyclers handle e-waste safely: this is wrong because certified drop-off programs are more likely to manage lead, mercury, and batteries properly.
- Mixing loose batteries with other e-waste: this is wrong because damaged lithium-ion batteries can overheat, spark, or catch fire during transport or shredding.
- Thinking recycling starts with shredding only: this is wrong because sorting, data removal, battery removal, and hazardous component handling often happen before shredding.
Practice Questions
- 1 A school collects 250 kg of e-waste. If 68 percent of the mass is recovered as usable materials, how many kilograms are recovered?
- 2 A recycling center processes 1,200 phones. Each phone contains about 15 g of copper. How many grams and kilograms of copper could be recovered if all the copper is collected?
- 3 A student says buying a new phone and recycling the old one is always better than repairing the old phone. Explain why repair and reuse often come before recycling in the waste management order.