Preparation of cationic chitosan-polyacrylamide flocculant
Compared with cationic polymer (the copolymer of AM and DMC, PAD), PCAD showed better flocculation ability under acid and neutral conditions, but worse ability under alkaline condition. Preparation of cationic chitosan-polyacrylamide flocculant and its properties in wastewater treatment | SpringerLink
The modified cationic chitosan-polyacrylamide was reported to be efficient as a flocculant at pH 5.5 when the dosage was 0.08 g/l [98]. However, chitosan is expensive and its efficiency is reduced
Preparation of Cationic Polyacrylamide Flocculant and Its
Cationic polyacrylamide flocculant was prepared by copolymerization of acrylamide(AM)and acryloyloxyethyltrimethyl ammonium chloride and the preparation process was examined.The optimum conditions are as follows:pH 6.0,total mass fraction of(NH4)2S2O8 and CH3NaO3S·2H2O 0.012 5%,mass ratio of(NH4)2S2O8 to CH3NaO3S·2H2O 1.0,mass fraction of azo
Preparation of octopus-like lignin-grafted cationic polyacrylamide flocculant and its application for water flocculation. International Journal of Biological Macromolecules 2025, DOI: 10.1016/j.ijbiomac.2025.12.245.
Preparation of Cationic Polyacrylamide-Grafted Starch
A cationic polyacrylamide-grafted starch (St-g-CPAM) flocculant for the coal slurry wastewater, was prepared by using corn starch and acrylamide (AM) as monomers, ethylene methyl propenoyl trimethylammonium chloride (DMC) as cationic monomer through solution polymerization. The effects of initiator concentration, reaction temperature, and monomer concentration on percentage of grafting and the
Recently, more attentions have been paid to natural polymer-based flocculants in water treatment, since they are believed to be low-cost, nontoxic, and environmentally friendly materials. In this work, strong cationic chitosan-based graft copolymer flocculants (3-chloro-2-hydroxypropyl trimethyl ammonium chloride (CTA) modified chitosan-graft-polyacrylamide, denoted as chitosan-CTA-g-PAM) have
Effects of Cationic Polyacrylamide Characteristics
Cationic polyacrylamide (CPAM) is a type of polyelectrolyte that has been widely used as a sludge conditioner because of its low dosage requirement, high efficiency, and pollution-free effects. Previous studies report that CPAM dosage is critical in sludge conditioning because overdoses increase cost and deteriorate sludge dewaterability [12] .
Cationic polyacrylamide (CPAM) has been developed and widely used for the separation and treatment of high-turbidity water because of its satisfactory solid-water separation performance and the negative charge properties of most high-turbidity wastewater. 6,7 Negatively charged particles can be thoroughly neutralized and destabilized by the
Fabricating a Flocculant with Controllable Cationic
Activated sludge dewatering experiment results reveal that the cationic microblocky flocculant exhibited superior dewatering efficiency, and a low moisture content of 71% and a specific resistance of 1.99 × 1012 m·kg–1 were acquired at pH 7.0 and a 40 mg L–1 dosage.
The typical cationic chitosan flocculants were related to the protonation of a large amount of amino group in acid solutions [10]. There is a wide application prospect on montmorillonite in the field of water treatment because of its rich resources in our country and its excellent adsorptive capacity of the modified montmorillonite [11]. During
A review on application of flocculants in wastewater
The present review article classifies the flocculants that have been studied and applied in wastewater treatment into three categories including chemical coagulants/flocculants, natural bio-flocculants and grafted flocculants as shown in Fig. 1.Chemical coagulants/flocculants are conventionally applied in wastewater treatment and derived from chemically/petroleum-based materials.
Polyacrylamide and Xanthan gum of broader commercial use Polyacrylamides Its aqueous solution is not corrosive to steel and produce high viscosities at low concentrations the product is sensitive to the presence of mineral salts and can not stand mechanical stresses.
- What is partially hydrolyzed polyacrylamide (PHPA)?
- Partially hydrolyzed polyacrylamide (PHPA), consisting of neutral acrylamide and anionic acrylate groups, is suitable for use in water with <25,000 mg/L TDS 12, 15.
- What is partial hydrolyzed polyacrylamide (HPAM)?
- Partially hydrolyzed polyacrylamide (HPAM) is a water-soluble polymer material used in oil fields [ 18, 19 ]. It usually has a linear structure with high molecular weight [ 20] and is obtained by partial hydrolysis of PAM or by copolymerization of sodium acrylate with acrylamide [ 21 ].
- Can hydrolyzed polyacrylamide be used for displacing reservoir oil?
- This research evaluates performance of an acrylamide-based polymer which can be used for displacing reservoir oil. Three associated polymeric systems were proposed based on hydrolyzed polyacrylamide (HPAM), reported PAAHO, and the novel syn- thesized and characterized functionalized copolymer PAAHAI.
- Is partially hydrolyzed polyacrylamide a good polymer?
- One of the increasingly employed polymers in EOR is partially hydrolyzed polyacrylamide (HPAM), largely because of its good water solubility, ideal viscosity and cost-effectiveness ( Zhang et al., 2011; Lopes et al., 2014; Xiao et al., 2017 ).
