title: Modified amylopectin based flocculant for the treatment of synthetic effluent and industrial wastewaters.
abstract: Herein, we report the application of an efficient polymeric flocculant based on amylopectin grafted with poly (acrylic acid) (g-AP) for the treatment of synthetic effluent as well as various industrial wastewaters. The flocculation characteristics of g-AP have been explored in different pH conditions using silica suspension by measurement of residual turbidity as well as floc size. Results suggest that in acidic pH, patching mechanism is predominating while at neutral and alkaline pH, bridging is the main mechanism. In addition, aggregation of particles and particle collision models confirm that bridging mechanism is the key mechanism at alkaline condition. Further, g-AP demonstrates excellent potential as flocculant for the treatment of paper effluent, textile wastewater and shows better flocculation performance than that of commercially available flocculant. Besides, the pilot scale study of mine processwater suggests excellent efficacy of g-AP as flocculant.
authors.affiliation: Polymer Chemistry Laboratory, Department of Applied Chemistry, Indian School of Mines, Dhanbad 826004, India.
authors.forename: Amit Kumar
authors.initials: AK
authors.lastname: Sarkar
authors.affiliation: Polymer Chemistry Laboratory, Department of Applied Chemistry, Indian School of Mines, Dhanbad 826004, India.
authors.forename: Soumitra
authors.initials: S
authors.lastname: Ghorai
authors.affiliation: Polymer Chemistry Laboratory, Department of Applied Chemistry, Indian School of Mines, Dhanbad 826004, India; Tata Steel R&D, Jamshedpur, India.
authors.forename: Abhay Shankar
authors.initials: AS
authors.lastname: Patra
authors.affiliation: Department of Environmental Science & Engineering, Indian School of Mines, Dhanbad 826004, India.
authors.forename: Brijesh K
authors.initials: BK
authors.lastname: Mishra
authors.affiliation: Department of Fuel & Mineral Engineering, Indian School of Mines, Dhanbad 826004, India.
authors.forename: N R
authors.initials: NR
authors.lastname: Mandre
authors.affiliation: Polymer Chemistry Laboratory, Department of Applied Chemistry, Indian School of Mines, Dhanbad 826004, India. Electronic address: pal.s.ac@ismdhanbad.ac.in.
authors.forename: Sagar
authors.initials: S
authors.lastname: Pal
mesh_terms: D000180:Acrylic Resins / Q000737:chemistry; D000687:Amylopectin / Q000737:chemistry*; D005427:Flocculation; D006863:Hydrogen-Ion Concentration; D010865:Pilot Projects; D011108:Polymers / Q000737:chemistry; D014865:Waste Disposal, Fluid; D062065:Wastewater / Q000737:chemistry*; D018508:Water Purification
chemical_list: D000180:Acrylic Resins; D000687:Amylopectin; D011108:Polymers; D062065:Wastewater
keywords: Amylopectin; Flocculation; Industrial wastewater