American Journal of Chemical Research


Synthesis of graphene oxide using tea-waste biochar and its application

Research Article of American Journal of Chemical Research Synthesis of graphene oxide using tea-waste biochar as green substitute of graphite and its application in de-fluoridation of contaminated water Swapnila Roy Department of Chemical Engineering, Jadavpur University, 188, Raja S.C. Mullick Road, Kolkata - 700 032, India In the present study, pyrolysis of domestic tea waste was carried out to yield bio-char. The biochar obtained was further used as a substitute for graphite in synthesis of graphene oxide (GO) in the conventional process. GO obtained was further applied for fluoride removal from simulated effluents. The prepared adsorbent was characterized using SEM, XRD and FTIR analysis. Effect of different experimental parameters on the de-fluoridation efficiency of the reported adsorbent was investigated. Data obtained was further used for determination of process isotherms, kinetics and thermodynamics. The regeneration potential of the reported adsorbent was also determined. The experimental results suggested that equilibrium adsorption data was strongly guided by the Langmuir isotherm and pseudo-second-order kinetics. Analysis of process thermodynamics also revealed that the adsorption reaction was spontaneous chemisorption in nature. Significant process parameters including GO dosage, ambient temperature and contact time were optimized using Response surface methodology (RSM) and artificial neural network (ANN). Results of RSM and ANN analysis indicated good correlation between experimentally recorded and theoretically predicted % fluoride removals. Under optimized conditions, fluoride removal efficiency was found to be 98.31%. Therefore, it can be inferred that tea waste derived biochar may be accepted as a sustainable alternative of graphite for GO synthesis. Moreover GO so obtained has immense potential for de- fluoridation of effluents in highly reduced dosage and treatment time. Keywords: Tea waste; Non-graphite GO; Fluoride removal; Process optimization; Isotherms and kinetics; Chemisorption ...

Dr Chunya Li
Professor, College of Chemistry and Materials Science, South Central University for Nationalities, Wuhan, Hubei, China

Dr Mohammad Hadi Dehghani
Professor, Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences

Dr Mohamed Abdel Moneim Deyab
Physical Chemistry, Egyptian Petroleum Research Institute (EPRI) Cairo

Dr Boumediene Haddad
Associate professor (lecturer and Scientific Researcher), Department of Chemistry, Dr. Moulay Taher University

Dr. Anil Kumar
Assistant Professor, Department of Chemistry, Lovely Professional University

Dr. Prakash Prajapat
Assistant Professor, Department of Chemistry, Mehsana Urban Institute of Sciences, Ganpat University

Dr Swapnila Roy
30B/4,Mahendra Roy lane,Kolkata-46.

Dr Suban K Sahoo
Assistant Professor, Department of Applied Chemistry, S.V. National Institute of Technology (SVNIT) Ichchanath

Dr Azeez Abdullah Barzinjy
Department of Physics, College of Education, Salahaddin University

Dr. Rasha Samir Mohamed Kamal
Professor researcher associated, Egyptian Petroleum Research Institute

Dr Sharma Kumari Kavita
Department of Chemistry, Idaho State University

Dr Qingchun Ge
Professor, College of Environment and Resources, Fuzhou University

Dr Mohamed A. Hassaan
Researcher, National Institute of Oceanography and Fisheries (NIOF)

Dr Hassan Karimi-Maleh
Department of Chemistry, Graduate University of Advanced Technology

Dr Hager Rabea Mohamed Ali
Researcher, Central lab department, Egyptian Petroleum Research Institute (EPRI)

Dr Ho Soon Min
Associate Professor, INTI International University

Dr Slimane MEROUANI
Associate professor, Department of Chemical Engineering, Faculty of Pharmaceutical Engineering Process,University of Constantine

Dr. Himanshu Kapoor
Assistant Professor, Department of Chemistry, Lovely Professional University

Dr. Harish Mudila
Asst. Professor, Dept. of Chemistry, Faculty of Technology and Sciences, Lovely Professional University

Dr. Praveen Kumar Sharma
Associate Professor, Department of Chemistry, Lovely Professional University

Dr. Keyur D. Bhatt
Head, Department of Chemistry, Mehsana Urban Institute of Science, Ganpat University

Dr Viraj H Mankar
Assistant Professor, Lovely Professional University

Dr. Marwa A. Fouad
Associate Professor, Pharmaceutical Chemistry Department, Faculty of Pharmacy, Cairo University

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American journal of chemical research

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