Effective Removal of Reactive Violet 2 Dye by Using Different Geopolymers Containing Bentonite

Document Type : Original Article


1 Faculty of Women for Arts, Science and Education, Chemistry Department, Ain Shams University, Cairo, Egypt.

2 Dyeing, Printing and Textile Auxiliaries Department, Textile Research and Technology Institute, National Research Centre, 33 El Buhouth St., Cairo 12622, Egypt


The excessive potency of pollutant effluent is an issue that needs to be handled globally. The untreated discharge of toxic compounds into water resources, such as dyes, heavy metals, surfactants, medicines, and pesticides, is a major problem. As a result, different technologies have been used to treat wastewater, including coagulation-flocculation, precipitation, and adsorption. Geopolymers and composites are revolutionizing wastewater clean-up by effectively removing pollutants and immobilizing contaminants, reducing reliance on costly, less environmentally friendly traditional methods. The objective of the current study was to examine the adsorptive characteristics of different geopolymer mixes using different aluminosilicate precursors such as metakaolin (MK), slag (GBFS), fly ash (FA), and bentonite (BT) for the adsorption of reactive violet 2 dye. In order to enhance the removal process, the impact of pH, adsorbent quantity, contact time, and starting concentration was investigated. The results revealed that geopolymer mix based on slag and bentonite removed 94.8% of the dye, geopolymer mix based on fly ash with bentonite removed 92.8% of the dye, and geopolymer mixes containing bentonite and metakaolin removed 90.2 of the dye from the aqueous solution