Open AccessA prudent approach for the removal of copper (II) and cadmium (II) ions from aqueous solutions using indigenous Mactra aequisulcata shells
Author(s) -
Syed Muhammad Rehan Ullah,
Erum Zahir,
Muhammad Asif Asghar
Publication year - 2021
Publication title -
journal of the serbian chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.227
H-Index - 45
eISSN - 1820-7421
pISSN - 0352-5139
DOI - 10.2298/jsc201228028u
Subject(s) - biosorption , aqueous solution , langmuir adsorption model , adsorption , point of zero charge , cadmium , nuclear chemistry , copper , langmuir , chemistry , metal ions in aqueous solution , metal , sorption , organic chemistry
In this study, the raw seashells of Mactra aequisulcata, of the class Bivalvia and the phylum Mollusca were employed as an adsorbent to remove copper (II) and cadmium (II) metal ions from aqueous solution. The characterization of shells was performed using FTIR, EDX and SEM, BET isotherm and point of zero charge (pHpzc). Batch experiments were performed to assess various factors on the biosorption efficiency. Maximum adsorption of both metals ions conveniently found at 0.4 g L-1 adsorbent dose, pH 5 and at 303 K. Maximum biosorption capacities for Cu2+ and Cd2+ were 59.57 and 38.12 mg g-1, respectively. The Langmuir isotherm model was found to be the best fit for the acquired equilibrium data. Thermodynamic and kinetic parameters showed that the process was feasible, exothermic and followed pseudo-first order.