Polyacrylamide degradation and its implications in environmental systems | npj Clean Water
The presence of TiO 2 nanoparticles caused a further reduction in MW to 3 × 10 4 Da. 81 Photocatalytic degradation is also enhanced in the presence of Fe 3+ at low pH. 83,84 The MW of PAM (15 mg
HORTSCIENCE VOL. 40(7) DECEMBER 2005 2041 production and performance. Finally, we cal-culated the expected bene fi t of polyacrylamide hydrogel to predict its utility under low- and high-water-demand situations. Materials and Methods Physical
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Instead of traditional preliminary intercalation by cationic surfactants, CPAM in our experiment was used to intercalate into bentonite following cation exchange mechanism. The pH value of CPAM was adjusted to pH 4.6 to provide –NH(CH 3) 2 + gro
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Synthesis of a cationic polyacrylamide by a photocatalytic surface-initiated method and evaluation of its flocculation and dewatering performance: nano-TiO 2 as New products for rubber additives with promotion price varieties of products
As shown in Fig. S3, the equilibrium absorption capacities are decreased from 1008.65 to 298.64 mg g −1 for NR, 393.25 to 168.82 mg g −1 for MB, 810.67 to 251.30 mg g −1 for MV and 553.37 to
Removal of methylene blue dye from aqueous solution using a superabsorbant hydrogel the polyacrylamide: isotherms and kinetic studies
The present work aims the elimination of an organic dye Methylene Blue (MB) by adsorption on the polyacrylamide (PAAM) hydrogel. Several experiments series were then carried out in order to study the influence on the adsorption capacity of
2.3. Characterization of Copolymers The intrinsic viscosities and the cationic degree (CD) of polymers were determined by using an Ubbelohde viscosity meter (Shanghai Shenyi Glass Instrumental Co. Ltd., Cooking) at 30 C and colloid titration
PH sensitivity and swelling behavior of partially hydrolyzed formaldehyde-crosslinked poly(acrylamide) superabsorbent hydrogels
and basic region (pH 8 and 2). At pH 8, the hydrogel swells up to 75 g/g because of anion–anion repul-sive electrostatic force, while at pH 2 it shrinks
Increasing the pH of solution (2.0 < pH < 4.4) promoted ionization of the functional groups (-N(CH 3) 2) existing in methyl orange, which resulted in easier ion interactions with cationic quaternary ammonium groups of the hydrogel, thus
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Abstract Carbon dioxide triggers have attracted much attention due to their low cost, non-toxicity, simplicity and environmental benignity. N, N-dimethylolamidopropylamine (DOAPA) is a CO 2 switchable surfactant, the properties of which can be
- What factors affect the flocculation effect of cationic polyacrylamide (CPAM)?
- Cationic polyacrylamide (CPAM) is a commonly used flocculant for water treatment. Factors that affect the flocculation effect and can be controlled manually include the type and dosage of CPAM, wastewater pH, stirring time and settling time, and their reasonable setting is critical to the flocculation effect of CPAM.
- What is cationic polyacrylamide (CPAM)?
- Cationic polyacrylamide (CPAM) is one of the most frequently used flocculants with high intrinsic viscosity and charge density. This flocculant is a water-soluble acrylamide-based polymer having cationic quaternary ammonium groups .
- Does cationic polyacrylamide flocculate Phaeodactylum tricornutum?
- However, Nguyen et al., observed high flocculation efficiency of marine microalgae Phaeodactylum tricornutum with a cationic polyacrylamide flocculant (FO3801). The discrepancy in the literature suggested that a future flocculation study using one type of polymer with multiple marine species.
- Which cationic polymer has the best flocculation efficiency?
- The PAmPTAC polymer had an optimal dose at 252 mg/g dry biomass. The difference in flocculation efficiency between two polymers is likely due to the differences in molecular weight. In the flocculation process by cationic polymers, charge neutralization of microalgal cells initiates floc formation.
