Abstract Copolymers of [2-(acryloyloxy)ethyl]trimethylammonium chloride (AETAC) and acrylamide (AAm) (AETAC- co -AAm) are polyelectrolytes used as flocculants in wastewater purification. Diffusion-ordered two-dimensional NMR spectroscopy (DOSY) experiments for AETAC- -AAm samples with M w ranging from 1.9 to 3.9 million a polyacrylamide sample 1.3 were carried out pure D 2 O containing 0.1 or 1...

Microalgae have a lot of potential as source several compounds interest to various industries. However, developing sustainable and efficient harvesting process on large scale is still major challenge. This particularly problem when the production low-value products intended. Chemical flocculation, followed by sedimentation, seen an alternative method improve energetic economic balance step. In ...

In this study, coagulation performance by using biological flocculants (BFs; produced from strain Bacillus sp. F6) for turbidity removal was investigated. The results demonstrated that BFs were able to eliminate turbidity from kaolin clay solution over a wide dosage range ( DR = 6–20 mg L ). The removal efficiency with BFs reached 86 % on average, lower than 95 % with Al2(SO4)3 ( Al = 6.5 mg L ...

We report on the mechanisms and application of dextran-graft-polyacrylamide star-like polymers as efficient flocculation aids. Demonstrated in this paper is that these form complexes with three common radionuclide contaminants: uranium, strontium, cesium. Application flocculant aids together inexpensive kaolinite-like materials allows fast purification water. The methods presented here can be e...

Dredged sediment has high water content, and its engineering characteristics are poor; therefore, the treatment disposal of dredged is difficult, utilization efficiency these resources low. Various methods can be used to dehydrate sediment, among which flocculation dewatering most widely used. In this study, basic properties were examined, dehydration effect was analyzed in relation polyaluminu...

In the coal preparation plant, the run of mine coal undergoes a series of operations, including washing, wet screening, sedimentation and dewatering. The process requires the circulation of large volumes of water from which large volumes of waste water containing a variety of solid particles are generated. Clarification of the tailing water is often carried out in a thickener by adding suitable...