Equilibrium, Kinetic and Thermodynamic Assessment of the Adsorption of Cadmium Using Water Lily (Nymphaea Ampla) Leaf Biomass
Journal Title: The Journal of Middle East and North Africa Sciences - Year 2016, Vol 2, Issue 10
Abstract
The adsorption of cadmium (II) ions from aqueous solution by Nymphaea ampla leaf biomass was carried out with effects of initial cadmium concentration, solution pH, contact time, adsorbent dose and temperature of the process investigated. An adsorbent dosage of 120 mg showed maximum metal uptake capacity (qe) of 2.75 mg/g (82.6%) for an initial metal ion concentration of 2.0 mg/L and pH 7. Sorption equilibrium time was observed in 30 minutes. The equilibrium adsorption data were analyzed by the Langmuir, Freundlich, Temkin and Dubinin- Radushkevich (D-R) adsorption isotherm models. Freundlich isotherm yielded the best fit to the experimental equilibrium adsorption data with a correlation coefficient (R2) of 0.990. The kinetics of cadmium (II) ions adsorption was discussed using pseudo-first-order, pseudo-second-order, and intraparticle diffusion models. It was discovered that the adsorption of cadmium (II) ions could be described by the pseudo-second-order kinetic model. Thermodynamic parameters such as Gibbs free energy (ΔG0), enthalpy (ΔH0) and entropy change of the sorption (ΔS0) evaluated showed that the process was spontaneous, feasible and exothermic in nature. The results indicated that Nymphaea ampla leaf biomass can be used as an effective and low-cost adsorbent to remove cadmium (II) ions from aqueous solutions.
Authors and Affiliations
Japhet Joel Gongden, Julian Nnebedum, Mary Luka Kagoro
Keywords
Related Articles
- EP ID EP210169
- DOI -
- Views 103
- Downloads 0
Teaching Basic Terms in Statistics through Storytelling and Linkages
There are various methods of imparting knowledge to students in a way they will quickly understand what is being passed across to them. Such methods include the introduction of teaching aids like film shows, related mate...
Substitute Milk Product Based on Oleaginous Seeds (Almonds, Ajonjoli, and Sunflower Seed) for Infants from 0 to 5 Years Old
In Mexico, important changes are currently happening that involve our quality of life, especially because of the feeding we are having. Since we are born, we have been thought that the more milk we consume the better dev...
Temephos Resistance and Esterase Activity in Selected Laboratory Population of Culex Pipiens from Tunisia
Selection for resistance to temephos (an organophosphorus insecticide) was performed by exposing larvae of the field-collection population of Culex pipiens to increasing doses of temephos for four generations. Mosquito l...
Analysis of Results of Proposal to Improve Medical Care in The Emergency Unit. Case Study: Hospital Regional Emilio Sánchez Piedras
Nowadays, the health sector in Mexico qualifies as unsatisfactory, with questionable and deficient attention in public hospitals and specifically in the medical emergency area waiting process. The term Lean Thinking (no...
Anxiety Experience and Preoperative Nursing Care Evaluation Among Postoperative Emergency Caesarian Section Patients in Two Selected Hospitals, Nairobi, Kenya
Emergency caesarean section poses obstetric, anesthetic and surgical risks to the mother and the unborn baby and exacerbates anxiety which is deleterious. Preoperative nursing care rendered during this period greatly inf...