We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
A Crambe abyssinica seed by-product as biosorbent for lead(II) removal from water.
- Authors
Rubio, Fernanda; Gonçalves, Affonso Celso; Dragunski, Douglas Cardoso; Tarley, Cesar Ricardo Teixeira; Meneghel, Ana Paula; Schwantes, Daniel
- Abstract
This study assessed the performance of a Crambe abyssinicaHochst seed by-product as biosorbent for removing lead [Pb(II)] ions from water. The material was characterized by scanning electron microscopy and infrared spectroscopy techniques as well as by point of zero charge (pHPCZ) measurement. The following parameters were determined after adsorption experiments: solution pH, biosorbent mass, contact time, and temperature. The optimal conditions were found to be mass –400 mg, solution pH 7.0, and equilibration time –20 min; they were used for performing isotherm tests. The isotherms were best fitted to the Freundlich and Dubinin–Radushkevich mathematical models. Based on the results of kinetic and thermodynamic studies (pseudo-second-order kinetics, negative change in Gibbs free energy, positive change in enthalpy and low ion desorption rate), it was established that the Pb(II) ions interacted forcefully with the biosorbent, thus confirming that a spontaneous endothermic chemisorption process took place. To check the effectiveness of the novel adsorbent for the Pb(II) removal and retention, comparative studies were carried out with activated carbon. On the basis of the obtained results, it has been possible to conclude that theC. abyssinicaseed by-product can feasibly be used as an alternative material for the remediation of lead-contaminated water, since it is sustainable and does not require pretreatment.
- Subjects
CRAMBE abyssinica; LEAD in water; LEAD &; the environment; INDUSTRIAL contamination; ENVIRONMENTAL remediation
- Publication
Desalination & Water Treatment, 2015, Vol 53, Issue 1, p139
- ISSN
1944-3994
- Publication type
Article
- DOI
10.1080/19443994.2013.836995