International Science Community Association Research Journal of Chemical Sciences 2231-606X 14 1 2024 02 18 Isotherm and batch system kinetics of cadmium ion sorption using mango seed shell 31 44 EN Zaware Sandeep 1 Synergen Bio Private Limited, Unit Nos. 101 to 104 and 309 to 311, Sai Chambers, 302, Old Mumbai – Pune, India Highway, Wakadewadi, Shivajinagar, Pune, Maharashtra - 411003, India Lahoti Neel 2 Synergen Bio Private Limited, Unit Nos. 101 to 104 and 309 to 311, Sai Chambers, 302, Old Mumbai – Pune, India Highway, Wakadewadi, Shivajinagar, Pune, Maharashtra - 411003, India Mohammed Aliyu Danmusa 1 Department of Chemistry, Umaru Musa Yar’adua University, Katsina, Katsina State, Nigeria Yusuf Amina Sada 2 Department of Chemistry, Umaru Musa Yar’adua University, Katsina, Katsina State, Nigeria Adam Ansar Bilyaminu 3 Department of Chemical Sciences, Federal University Wukari, Taraba State, Nigeria Awasthi Naveen 1 Department of Chemistry, Janta College Bakewar (206124), Etawah, India Mishra Divya Jyoti 2 Department of Agriculture Chemistry, Janta College Bakewar (206124), Etawah, India Dwivedi Nalini 3 Department of Chemistry, Raghunath Girls P.G. College, Meerut (250001), India Pandey Vivek Kumar 4 Department of Chemistry, D.B.S P.G. College, Govind nagar (208006), Kanpur, India Sivadharani P. 1 PG and Research Department of Chemistry, Government Arts College for women, Nilakottai-624208, India Bhamuni M.R. 2 PG and Research Department of Chemistry, Government Arts College for women, Nilakottai-624208, India Selvi M. Muthu 3 PG and Research Department of Chemistry, Government Arts College for women, Nilakottai-624208, India Jayapradha S.R. 4 PG and Research Department of Chemistry, Government Arts College for women, Nilakottai-624208, India Luka Yusufu 1 Department of Chemical Engineering, Faculty of Engineering, Modibbo Adama University, P.M.B 2076, Yola, Adamawa State, Nigeria Abubakar Abdulhalim Musa 2 Department of Chemical Engineering, Faculty of Engineering, Modibbo Adama University, P.M.B 2076, Yola, Adamawa State, Nigeria Saddiq Hassan Ahmed 3 Department of Chemical Engineering, Faculty of Engineering, Modibbo Adama University, P.M.B 2076, Yola, Adamawa State, Nigeria Isuwa Solomon 4 Department of Chemical Engineering, Faculty of Engineering, Modibbo Adama University, P.M.B 2076, Yola, Adamawa State, Nigeria > Research Paper 2023 10 27 2024 02 18 Cadmium (Cd) toxicity even in low amounts can be felt if consumed by humans and animals. Mango seed shell biosorption property to get rid of this metal ion from contaminated water is therefore proposed by this study after several thoughtful bench-scale batch examination, beginning with Fourier Transform Infrared (FTIR) spectroscopic analysis. In that regard, the removal of Cd2+ at higher biosorption percentage occurs at low process conditions, which are: 10 min contact time, 0.5g biosorbent dose, 5mg/L initial Cd2+ concentration and pH = 4, corresponding to 82.47%, 99.49%, 62.43% and 62.45%, respectively. Uniquely, in this study, two solution approaches for finding isotherm model parameters from Langmuir, Freundlich and Dubinin-Radushkevich (D-R) formulae were also examined. Herein, the nonlinear regression technique (NRT) with satisfactory statistical estimates was the best method of finding the model parameters compared to the graphical technique (GT). Based on reduced chi-square, coefficient of determination (R2) and the residual sum of squares (RSS) given by the user-defined NRT carried out in Origin Pro 2018, the best isotherm are in the order of Langmuir, D-R and Freundlich. Both techniques however, reveals that the adsorption of Cd unto mango seed shell endocarp is a physical adsorption process, due to an E = 0.3743 & 0.4677 kJ/mol obtained from the D-R isotherm. Also, an R2 = 0.9978 from linear fitting, presents the Pseudo Second order adsorption kinetic model followed by the Lagergren alternative proposed in the literature, as the best model under the specified conditions. The bottom line now is to compare the biosorbent performance of mango seed shell with others reported previously and to determine the percent removal of other toxic heavy metals, also studying their isotherms and kinetics. Copyright@ International Science Community Association