Spent tea grounds as a cost-effective adsorbent for the removal of methylene blue dye

Most dyes are widely used in various industrial dyeing purposes such as textiles, food, cosmetics, and printing paper. Among the examples of dyes used is Methylene Blue (MB) which is the most commonly used in various industries. Additionally, Tea is one of the most popular beverages, with approximately 3.5 million tons of tea consumed worldwide each year (Kumar et al., 2005). The purpose of this study is to use Spent Tea (TW) which has been used as an adsorbent for the removal of MB. Various experimental conditions were tested over different ranges such as initial dye concentration, adsorbent dosage, and contact time. By utilizing tea waste as an adsorbent, it offers a sustainable and eco-friendly approach for waste management and recycling. It helps in reducing the amount of tea waste that would otherwise end up in landfills. Tea waste's compounds can effectively bind with pollutants, heavy metals, dyes, or organic contaminants in wastewater, removing them from the water (Siam Hussain et al., 2018).