Effect of Adsorption Time and Amount of Adsorbent on Adsorption Efficiency

Abstract

The purpose of this study is to recycle waste fruit peels and follow the principle of “waste for waste” to study grapefruit peels which are rich in cellulose, so as to improve the application potential of grapefruit peels biochar in the fields of environment, agriculture and industry. The experimental material was Shatian Pomelo from Meizhou, Guangdong Province, with ferric chloride as modifi er, and modifi ed biochar was prepared by pyrolysis method. Methylene blue solution was used to simulate printing and dyeing wastewater, and the effects of adsorbent dosage and adsorption time on the adsorption efficiency of printing and dyeing wastewater were investigated by single factor experiment. The results showed that the adsorbent dosage was 4 g/L and the adsorption time was 30 min. Under these conditions, the adsorption performance of modifi ed grapefruit peel biochar on low concentration methylene blue solution reached the best, and the adsorption efficiency reached 97.16%.