Polyacrylamide degradation and its implications in environmental

High MW anionic PAM is also the most commonly applied polymer in enhanced oil recovery applications; the use of surfactant-polymer flooding can increase oil recovery by 5¨C30% 14 and in some...

Variations in the molecular weight response of anionic polyacrylamides

For flocculants based on a polyacrylamide (PAM) backbone, it is generally stated that increasing MW will lead to improved adsorption and settling performance ( Caskey and Primus, 1986, Clark et al., 1990, Petzold and Herrington, 1990 ), although this can be affected by many other factors.

Flocculating oil sands tailings with dual anionic/cationic polymers

[6, 7] Anionic polyacrylamide (PAM) is the most common flocculant for MFT, but when used alone it cannot recover much of the water trapped in the thick MFT slurry. [1, 8, 9] Even though modified PAMs and other new polymer flocculants have been used to improve MFT dewatering, they often need high doses, which limits their scale up. [6-8]

Best Practices Guidance for the Use of Anionic Polyacrylamide on

PAM aids solid-liquid separation by causing suspended particles to bind and form larger aggregates. The process is known as polymer bridging. One of the most common polymer flocculants on the market. Common uses of PAM as a flocculant: reduction of sediment and nutrient loads to natural lakes and ponds.

Fabricating an anionic polyacrylamide (APAM) with an anionic block

Flocculation experimental results demonstrated that the anionic microblocks in the template copolymer could enhance the charge neutralization and bridging ability, and therefore an excellent flocculation performance of treating high turbidity water was observed. 1. Introduction

A comparison study between bioflocculants and PAM for dewatering of

Results highlighted that PAM had the highest flocculation activity in low dosages (0.05 and 0.1 wt%) while in dosages above 0.25 wt%, cationic biopolymers; protamine, and lysozyme for kaolinite and anionic pectin for serpentine showed a higher performance than the other polymers.

Water Soluble Polymer Flocculants: Synthesis, Characterization,

Alagha et al. investigated the adsorption characteristics of polyacrylamide (PAM)-based polymers on anisotropic basal planes of kaolinite using QCM-D. 182 They first deposited the kaolinite nanoparticles on QCM-D sensor and flowed 500 ppm of Al(OH) 3-PAM flocculant over the sensor at a flow rate of 0.15 mL min ?1.

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anionic PAM can be used for flocculation. When flocculated with cationic PAM, the absolute value of the surface potential of the particles decreased, and the electrostatic adsorption between cations and tailings was the main way to produce loose flocs; when flocculated with anionic PAM, there was no

Flocculation of both anionic and cationic dyes in aqueous solutions by

1. Introduction Due to the development of modern society, textile industry has become one of the major polluters of water [1]. As the main pollutants in textile wastewaters, dyes are not only esthetically unwelcome, but also engender annoyance to the aquatic biosphere [2], [3].

A Review on Coagulation/Flocculation in Dewatering of Coal Slurry

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