Details

Autor(en) / Beteiligte

• Pal, Sagar
• Patra, Abhay Shankar
• Ghorai, Soumitra
• Sarkar, Amit Kumar
• Das, Raghunath
• Sarkar, Supriyo

Titel

Modified guar gum/SiO2: development and application of a novel hybrid nanocomposite as a flocculant for the treatment of wastewaterElectronic supplementary information (ESI) available: Details of settling test/jar test methods, GPC analysis results (Fig. S1 & S2), table of elemental analysis results (Table S1), HRTEM image of the g-GG/SiO2-4 nanocomposite (Fig. S3), rheological characteristics (Fig. S4 & S5), table of settling rate, floc size (Table S2), jar test results (Fig. S6), point of zero

Erscheinungsjahr

2015-01

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Using the sol gel process, a novel hybrid nanocomposite (g-GG/SiO 2 ) has been developed in the authors' laboratory by grafting synthetic polyacrylamide chains on a guar gum backbone (g-GG) in the presence of microwave irradiation followed by in situ nanosilica incorporation on the surface of g-GG. Various characterization methods propose that g-GG promotes silica polymerization and probably acts as a template for nanoscale silica formation. Rheological characteristics indicate the gelling properties of the hybrid material. The application of the composite material in flocculation has been investigated on the laboratory scale as well as on the pilot scale. The flocculation kinetics and mechanism have been explained on the basis of pH of the suspension and flocculant dosage. Because of strong matrix-nanofiller interactions as well as enhanced molecular weight and hydrodynamic radius, the modified biopolymer-based nanocomposite provides excellent potential as a flocculant for the treatment of various synthetic and industrial effluents through a green disposal technique. The hybrid nanocomposite g-GG/SiO 2 showed excellent flocculation efficiency, which is a powerful alternative to the literature known flocculants.