Laboratory experiments may be designed to eliminate waste. During experiments include certain steps which will eliminate hazardous end products by reusing the material for other reactions. This has the benefit of teaching students to avoid generating hazardous wastes, and take responsibility for their own wastes. Pre-weigh chemicals for student usage in the teaching labs when appropriate. This will reduce waste by spills and other mishandling.
Students can participate in pre-weighing and handling exercises.
Reuse or recycle spent solvent. When cleaning with solvent, reuse the spent solvent for the initial cleaning and use the fresh solvent only for the final rinsing. On-site distillation and reuse can be employed in some cases. Advantages include the reduction of disposal costs and the reduction of purchases of large quantities of new solvent. Distill and reuse solvent for classroom experiments or as cleaning agent where ultra pure solvent is not required.