International Science Community Association Research Journal of Chemical Sciences 2231-606X 12 2 2022 06 18 Optimization indigo carmine removal by biosorption materials from agriculture waste 62 72 EN Narmatha M 1 Vivekanand College of Engineering for Women, Namakkal, Elaiyampalayam, Tamil Nadu, India I.V. Haruna 1 Department of Geology, Modibbo Adama University of Technology, Yola P.M.B. 2076, Yola – Nigeria H.A. Ahmed 2 Department of Geology, Modibbo Adama University of Technology, Yola P.M.B. 2076, Yola – Nigeria B.M. Suleiman 3 Department of Geology, Modibbo Adama University of Technology, Yola P.M.B. 2076, Yola – Nigeria Rao Sangeetha 1 KLE’s S. Nijalingappa College, Rajajinagar, Bengaluru-10, India . Umeh 1 Gombe state University, Faculty of Sciences, Department of Chemistry, Gombe, Nigeria Michael Chukwudi 2 Gombe state University, Faculty of Sciences, Department of Chemistry, Gombe, Nigeria Karu Elisha 3 Gombe state University, Faculty of Sciences, Department of Chemistry, Gombe, Nigeria Nnamani 4 Gombe state University, Faculty of Sciences, Department of Chemistry, Gombe, Nigeria Onuorah Johnson 5 Gogoi Sumbita 1 Department of Chemistry, Dergaon Kamal Dowerah College, Dergaon, Golaghat-785614, Assam, India Patel Jayshree N. 1 Chemistry Department, Sir P.T. Science College, Modasa, Gujarat, India Patel Shailesh V. 2 Chemistry Department, Sir P.T. Science College, Modasa, Gujarat, India Awasthi Naveen 1 Department of Chemistry, Janta College Bakewar Etawah, India Hegde R.N. 1 Department of Chemistry, Sri Dharmasthala Manjunatheshwara College (Autonomous), Ujire-574 240, India Vishwanatha P. 2 Department of Chemistry, Sri Dharmasthala Manjunatheshwara College (Autonomous), Ujire-574 240, India Nandibewoor S.T. 3 Post Graduate Department of Studies in Chemistry, Karnatak University, Dharwad-580 003, India V.E.S. Zran 1 Constitution and Reaction of Matter Laboratory (LCRM) at UFR-SSMT University Félix HOUPHOUËT-BOIGNY (UFHB) of Cocody -Côte d'Ivoire, 22 BP 582 Abidjan 22 A.T.S. Konan 2 The Thermodynamics and Environmental Physico-Chemistry Laboratory, University NanguiAbrogoua (UNA), 02 BP 801 Abidjan 02, Côte d’Ivoire and Laboratory of Industrial Processes of Synthesis, Environment and New Energies Laboratory (LAPISEN) Félix HOUPHOUËT BOIGNY de Yamoussoukro, BP 1093 Yamoussoukro, Côte d’Ivoire L.P.M.S Kouakou 3 Constitution and Reaction of Matter Laboratory (LCRM) at UFR-SSMT University Félix HOUPHOUËT-BOIGNY (UFHB) of Cocody -Côte d'Ivoire, 22 BP 582 Abidjan 22 A.C. N’Guessan 4 Constitution and Reaction of Matter Laboratory (LCRM) at UFR-SSMT University Félix HOUPHOUËT-BOIGNY (UFHB) of Cocody -Côte d'Ivoire, 22 BP 582 Abidjan 22 K. B. Yao 5 Laboratory of Industrial Processes of Synthesis, Environment and New Energies Laboratory (LAPISEN) Félix HOUPHOUËT BOIGNY de Yamoussoukro, BP 1093 Yamoussoukro, Côte d’Ivoire A. Trokourey 6 Constitution and Reaction of Matter Laboratory (LCRM) at UFR-SSMT University Félix HOUPHOUËT-BOIGNY (UFHB) of Cocody -Côte d'Ivoire, 22 BP 582 Abidjan 22 P. Drogui 7 National Institute of Scientific Research (INRS Water, Earth and Environment), Université du Québec, 490 rue de la Couronne, Québec City, Canada > Research Paper 2022 1 28 2022 06 18 The optimization of indigo carmine removal on biosorbents by Hadamard and full factorial design designs was the subject of this study. The biosorbents used were prepared from cassava tuber peels and ripe banana peels, considered as agricultural waste in Côte d´Ivoire. The effect of six parameters (pH of the solution, mass of the biosorbent "banana peel or cassava peel", granulometry, concentration of the solution, stirring time and stirring speed) was studied to establish the optimal conditions for the removal of the indigo carmine dye. A Hadamard design established as a first approach, showed that only three parameters, namely: the mass of the biosorbent (cassava peel), the concentration of the solution and the stirring speed, had an influence on the response. The results of the second design, the full factorial design, showed that the removal rate of the indigo carmine increased with increasing mass of the biosorbent. The maximum removal rate obtained was 96.80% when 5.00mg/L of indigo carmine solution was contacted with 1.20g of the biosorbent obtained from cassava peel, 2.00mm particle size, at a stirring speed of 250rpm for 60 minutes. Copyright@ International Science Community Association