Using ResourcesDeep Dive
Recycling Processes for Different Materials
Part of Recycling — GCSE Chemistry
This deep dive covers Recycling Processes for Different Materials within Recycling for GCSE Chemistry. Revise Recycling in Using Resources for GCSE Chemistry with 20 exam-style questions and 14 flashcards. This topic appears less often, but it can still be a useful differentiator on mixed-topic papers. It is section 5 of 20 in this topic. Use this deep dive to connect the idea to the wider topic before moving on to questions and flashcards.
Topic position
Section 5 of 20
Practice
20 questions
Recall
14 flashcards
Recycling Processes for Different Materials
Metal Recycling Process
Collection and Sorting:
- Magnetic separation for ferrous metals (steel, iron)
- Eddy current separation for non-ferrous metals (aluminum, copper)
- Manual sorting for different metal types
Processing:
- Shredding into small pieces
- Melting in furnaces (much lower temperature than ore processing)
- Purification to remove contaminants
- Casting into ingots or shapes for remanufacturing
Plastic Recycling Process
Collection and Identification:
- Sorting by plastic type using resin identification codes (#1-#7)
- Infrared spectroscopy or density separation
- Color sorting to maintain quality
Processing:
- Washing to remove labels, adhesives, and contaminants
- Shredding into flakes or chips
- Melting and pelletizing into plastic pellets
- Remanufacturing into new products
Glass Recycling Process
Collection and Cleaning:
- Color sorting (clear, brown, green)
- Removal of caps, labels, and contaminants
- Optical sorting to remove non-glass materials
Processing:
- Crushing into cullet (small glass pieces)
- Melting at 1500°C (30% less energy than virgin materials)
- Molding into new glass products
Paper Recycling Process
Collection and Preparation:
- Sorting by paper grade (newspaper, cardboard, office paper)
- Shredding and adding water to create pulp
- Removal of contaminants (staples, plastic, ink)
De-inking and Processing:
- Flotation or washing to remove ink particles
- Bleaching if white paper is required
- Sheet formation and pressing
- Drying to create new paper products