Biosorptive uptake of methylene blue using Mediterranean green alga Enteromorpha spp

• Published in: Journal of hazardous materials Vol. 170; no. 2; pp. 1050 - 1055
• Main Authors: Ncibi, M.C., Hamissa, A.M. Ben, Fathallah, A., Kortas, M.H., Baklouti, T., Mahjoub, B., Seffen, M.
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier B.V 30-10-2009; Elsevier
• Subjects: Absorption; Adsorption; Applied sciences; Basic dye; Biological and medical sciences; Biomass; Biotechnology; Chemical engineering; Chlorophyta - chemistry; Enteromorpha; Error deviation; Exact sciences and technology; Fundamental and applied biological sciences. Psychology; Green alga; Hydrogen-Ion Concentration; Isotherm modelling; Linear Models; Mediterranean Sea; Methods. Procedures. Technologies; Methylene Blue - chemistry; Nonlinear Dynamics; Others; Pollution; Thermodynamics; Various methods and equipments; Mediterranean Sea; MED; Error deviation; Green alga; Adsorption; Basic dye; Isotherm modelling; Linear regression; Adsorption capacity; Regression analysis; Biomass; Modeling; Uptake; Sorption; Biosorption; Batchwise; pH; Aqueous solution; Sorbent; Comparative study
• ISSN: 0304-3894; 1873-3336
• DOI: 10.1016/j.jhazmat.2009.05.075

Batch biosorption experiments were carried out for the removal of methylene blue, a basic dye, from aqueous solution using raw and dried
Enteromorpha spp., Mediterranean green alga. A series of assays were undertaken to assess the effect of the system variables, i.e. contact time, solution pH and sorbent amount. The results had showed that sorption capacity was optimal using 6–10 solution pH range (i.e. maximum adsorption capacity of 274
mg/g). The minimum sorbent concentration experimentally found to be sufficient to reach the total removal of the dye molecules from the aqueous solution was 5
g/L. Besides, equilibrium data were fitted using five linearisable isotherm models. The related results showed that the experimental data were very well represented by the Langmuir model for the linear regression analysis and both the Langmuir and Redlich–Peterson isotherm models for the non-linear analysis. In both cases, such modelling behaviour confirms the monolayer coverage of methylene blue molecules onto energetically homogenous
Enteromopha surface. In addition, an exhaustive comparative study was done to situate this marine biomass among other proposed sorbents.