Flocculation kinetics and floc characteristics of dye wastewater by polyferric chloride–poly-epichlorohydrin–dimethylamine composite flocculant

Effects of epichlorohydrin–dimethylamine on coagulation and membrane performance of ferric chloride in coagulation–ultrafiltration hybrid process

“…According to Fig. 2D, zeta potential did not changed much at that point and kept far below À10 mV, which means sweep and adsorption should take the main part of coagulation process [5]. This result revealed that DAM-ECH could effectively increase turbidity removal effect of FC under low dosage.…”

“…Then dimethylamine was constantly dripped into the flask using a dropping funnel, and the mixture was under steady stirring throughout the whole dripping process. At last, certain dose of ethanediamine was introduced into flask under continuous stirring as the cross-linker [5].…”

“…Thus, removal of humic substances has drawn worldwide attention recent decades in modern water treatment. As an extensively used coagulant in water treatment processes, ferric chloride (FC) can remove humic acid molecules in water bodies by forming strong and large flocs [3][4][5]. Moreover, many researchers have proved that compounding of iron salt flocculants with organic polymer would be more effective in HA and turbidity removal than single use of iron salts [6].…”

Preparation and characterization of gum karaya hydrogel nanocomposite flocculant for metal ions removal from mine effluents

“…A host of techniques making use of inorganic coagulants are often applied for the removal of suspended solids from mine water and control of the pH; however, problems related to the large amount of coagulants needed, excessive accumulation of sludge, the instability and breakage of aggregates, as well as the need of water conditioning have motivated investigation of alternative flocculants or coagulants (Rodriguez et al 2003;Brostow et al 2009;Yang et al 2013). The efficiency of the flocculation process depends on the ability of coagulants and/or flocculants to adsorb on the fine residue particles bringing them together to form larger flocs which are likely to settle at a faster rate.…”

Preparation characteristics and accelerating denitrification effectiveness of polyamide 6 modified by AQS

“…It is known that functional polymers serve a role as flocculants, [10] ion exchange resins [11] and ionic membranes [12] on the physical/chemical treatment process of hexavalent chromium, [11] ceric ion, [13] azo dyes, [14] nitrite, nitrate [15] and cobalt. [16] Meanwhile, functional polymers act as biocarriers and play an important role in biofilm processes, which is one of the important biological treatment technologies.…”