title: Valorization of the Vicia faba mucilage on textile wastewater treatment as a bio-flocculant: process development and optimization using response surface methodology (RSM).
abstract: The Vicia faba membranes are an abundant and a low cost product. In the present research paper, the extracted Vicia faba mucilage was tested as an eco-friendly flocculant for textile wastewater treatment. Its performance as flocculant, in decolorization, chemical oxygen demand (COD) removal and the concentration of total suspended solids was checked. The natural extracted product was characterized using infrared spectroscopy. The total sugars were determined in the extracted product. The effect study, followed by an optimization and modeling analysis, of some experimental parameters on the coagulation-flocculation performance, using Vicia faba mucilage (as a flocculant), combined with aluminum sulfate (as a coagulant), showed that the best conditions for the flocculation process were pH of the effluent about 7, flocculant dose about 6.75 mg/L, flocculation mixing time about 3 min and flocculation mixing speed about 30 rpm, leading to a decolorization equal to 92.32%, COD removal of about 97.52% and total suspended solids of about 15.3 mg/L. A comparison study between the flocculation performance of commercial reagents and the bio-agent showed that the natural product presented a good flocculation performance.
authors.affiliation: Research Unit of Applied Chemistry and Environment, Faculty of Sciences of Monastir, University of Monastir, Environment Street, Monastir 5000, Tunisia E-mail: bouatay_feriel@hotmail.com.
authors.forename: Feriel
authors.initials: F
authors.lastname: Bouatay
authors.affiliation: Research Unit of Applied Chemistry and Environment, Faculty of Sciences of Monastir, University of Monastir, Environment Street, Monastir 5000, Tunisia E-mail: bouatay_feriel@hotmail.com.
authors.forename: Nesrine
authors.initials: N
authors.lastname: Eljebsi
authors.affiliation: Research Unit of Applied Chemistry and Environment, Faculty of Sciences of Monastir, University of Monastir, Environment Street, Monastir 5000, Tunisia E-mail: bouatay_feriel@hotmail.com.
authors.forename: Sonia
authors.initials: S
authors.lastname: Dridi-Dhaouadi
authors.affiliation: Research Unit of Applied Chemistry and Environment, Faculty of Sciences of Monastir, University of Monastir, Environment Street, Monastir 5000, Tunisia E-mail: bouatay_feriel@hotmail.com.
authors.forename: Farouk
authors.initials: F
authors.lastname: Mhenni
mesh_terms: D000534:Alum Compounds / Q000737:chemistry; D057919:Biological Oxygen Demand Analysis; D005427:Flocculation; D007220:Industrial Waste / Q000032:analysis; D008962:Models, Theoretical; D062087:Plant Mucilage / Q000737:chemistry*; D013499:Surface Properties; D013783:Textile Industry; D031307:Vicia faba / Q000737:chemistry*; D062065:Wastewater / Q000032:analysis*; D014874:Water Pollutants, Chemical / Q000032:analysis*; D018508:Water Purification / Q000379:methods*
chemical_list: D000534:Alum Compounds; D007220:Industrial Waste; D062087:Plant Mucilage; D062065:Wastewater; D014874:Water Pollutants, Chemical; C041524:aluminum sulfate