Perlite is commonly used as a dye-absorbing material, but after it absorbs dye, the industry typically discards it due to its low cost and lack of recovery incentives. Some research indicates that perlite can be regenerated, as its chemical composition remains unchanged after dye absorption. There are suggestions that used perlite could potentially serve as a cement filler or in other applications, though specific resources on this are limited. Overall, while disposal is common, regeneration and alternative uses are areas of ongoing exploration. Understanding these options can help in finding sustainable solutions for used perlite.
