Settling rates for flocculation of iron and manganese ore‐containing suspensions by cationic glycogen

Abstract

Novel flocculants have been synthesized on the basis of glycogen. The efficiency of cationic glycogen can be explained in terms of Singh's qualitative easy approachability model (EAM). The jar test was used previously to evaluate flocculation efficacy, but we have recently shown that a plot of interface height vs. settling times provides a better measure. In accord with the EAM, a one-to-one correspondence between settling velocity and radius of gyration of flocculants in various solutions has been demonstrated, providing quantitative proof of the EAM. Now the flocculation efficacy of cationic glycogen is evaluated by determination of settling times in both iron and manganese ore suspensions and compared with the performance of other polymer flocculants. Its superior flocculation efficacy over commercial flocculants and other flocculants synthesized by us is demonstrated.

Separation of natural trivalent oxides of arsenic and antimony

“…Gamma-radiation polymerized Zn methacrylate has been used as a sorbent for removal of lead ions from wastewater [13]. Some of us use also polymeric flocculating agents for removal of metal suspensions from wastewater [14][15][16].…”

A facile disposal of Bayer red mud based on selective flocculation desliming with organic humics

“…Cross-sectional images of the wet flocs with the optical microscope observing. humics function already at least at the same level as the commercial flocculants in terms of the settling velocity of fine particles [35].…”

PDADMAC flocculation of Chinese hamster ovary cells: Enabling a centrifuge-less harvest process for monoclonal antibodies

“…12 Shear resistant flocculent particles are desirable from a commercial manufacturing standpoint because it is known that shear forces due to high mixing rates or prolonged mixing during the addition of the flocculant into the cell culture broth may inhibit flocculent growth or fragment the flocculent producing smaller and slower settling flocculent particles. 14 The choice of flocculant used in this study, PDADMAC, has been approved by the Food and Drug Administration for use as an antimicrobial agent in wound dressing for humans. 15 The synthesis of PDADMAC from the monomer, DADMAC, produces a linear polymer with a wide molecular weight (MW) range from monomer to a multimeric polymer.…”