Innovation in dewatering process of flotation tailings by study of particle interaction in colloidal environment

Malíková, Petra; Thomas, Jan; Chromíková, Jitka; Vidlář, Jiří; Kupka, Jiří

doi:10.1016/j.pisc.2015.11.028

Cited by 9 publications

(6 citation statements)

References 13 publications

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“…Malikova et al. dewatered the floatation tailings using inorganic polymers such as polyaluminium chloride at different temperatures and investigated the temperature effect using a combination of zeta potential and turbidity measurements . Figure shows the optimization of flocculation temperature using a combination of zeta potential and turbidity measurements.…”

Section: Performance Assessment Of Flocculantsmentioning

confidence: 99%

See 1 more Smart Citation

Water Soluble Polymer Flocculants: Synthesis, Characterization, and Performance Assessment

Vajihinejad

Gumfekar

Bazoubandi

et al. 2018

Macro Materials & Eng

128

108

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Water soluble polymer flocculants are important constituents of solid–liquid separation units for the treatment of a variety of process‐affected effluents. The systematic development of a flocculant relies on a good understanding of flocculation process, polymer synthesis, polymer characterization, and, not the least, flocculation performance assessment as desired for a particular treatment process, all of which are essential to establish meaningful relationships between flocculant microstructure and flocculation efficiency. The aim of this article is to communicate the bigger picture of this research area to the readers. The recent advances in the application of bio/natural, synthetic, and stimuli‐responsive flocculants are reviewed. Then, the basic polymer reaction engineering tools to control the microstructure of flocculants are provided and the techniques for the quantification of flocculant microstructure are concisely discussed. This is followed by a review of the methods used for the characterization of particle‐polymer force measurement, and flocculation/dewatering assessment with attention to the characterization of aggregate structures.

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Section: Performance Assessment Of Flocculantsmentioning

confidence: 99%

Section: Performance Assessment Of Flocculantsmentioning

confidence: 99%

Water Soluble Polymer Flocculants: Synthesis, Characterization, and Performance Assessment

Vajihinejad

Gumfekar

Bazoubandi

et al. 2018

Macro Materials & Eng

128

108

View full text Add to dashboard Cite

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“…The described methods for evaluation of the settling behaviour were also applied for the investigation of the Recent studies illustrated the efficiency of the combined coagulation-flocculation treatments on the acceleration of the settling rate in suspensions and improvement of the compaction. [6,7] In our work, a series of settling experiments were designed with different concentrations of coagulant and flocculant additives. Coagulant solutions were prepared using aluminium sulphate and tailings PAW at 0.1 wt.%.…”

Section: Flocculant and Coagulant Treatmentsmentioning

confidence: 99%

“…Recent studies on combined coagulation-flocculation treatments of solid-liquid suspensions showed the efficiency of such treatments for engineering applications due to their ability to control the velocity of the settling processes and the density of the compacted substances. [6,7] However, the effectiveness of application of such treatments depends of the proper selection and amount of the additives, and requires development of monitoring methodologies.…”

Section: Introductionmentioning

confidence: 99%

Laboratory monitoring approaches for tailings settling and evaluation of flocculant and coagulant treatments

Babak

Li²,

Cabrera

et al. 2021

Can J Chem Eng

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X-ray computer tomography (CT), magnetic resonance imaging (MRI), and nuclear magnetic resonance (NMR) are applied for laboratory monitoring of the settling behaviour in tailings suspensions. It is shown that the developed monitoring techniques are consistent with each other and provide different levels of information from 2D density cross-sections obtained using X-ray CT to 1D and bulk water content using MRI and NMR. Analysis of coagulant and flocculant treatments based on obtained measurement information is conducted using linear and nonlinear kinetic modelling approaches. The linear Roberts' kinetic model describes the settling of original tailings suspensions very well, but it is not adequate for the suspensions treated with additives. A modified nonlinear Roberts' model is developed and successfully applied to analyze the suspension with additives. The analysis of combined flocculants and coagulants treatments reveals that flocculants significantly affect the settling rate; however, they decrease the efficiency of settling with respect to the residual water content. Coagulants affect mostly the residual water content in samples, but do not change the settling rate significantly. The trade-off between concentrations of coagulants and flocculants needs to be achieved for optimal settling treatments.

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“…PAFC is a compound flocculant that can be used to remove color; given its effects, PAFC is often used in water or wastewater treatment [20,21]. The flocculating mechanism of flocculants is achieved through double-layer compression, charge neutralization, sweep flocculation, and bridge aggregation [22]. The addition of flocculants can destabilize the silt, causing the particles to sink, and the subsidence of particles is affected not only by gravity but also by resistance, where the larger the resistance, the weaker the downward force and the lower the particle subsidence rate.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Flocculants and Water Content on the Separation of Water from Dredged Sediment

Wen

Yao

2023

Water

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Dredged sediment has high water content, and its engineering characteristics are poor; therefore, the treatment and disposal of dredged sediment is difficult, and the utilization efficiency of these resources is low. Various methods can be used to dehydrate dredged sediment, among which flocculation dewatering is the most widely used. In this study, the basic properties of dredged sediment were examined, and the flocculation dehydration effect of dredged sediment was analyzed in relation to the polyaluminum ferric chloride (PAFC) dosage, water content, and time. There is an optimal flocculant dosage added during dredged sediment processing. Dredged sediment with high water content has obvious flocculation effect. Flocculant can speed up the flocculation dehydration of dredged sediment in a short time, but long-term dehydration has no advantages compared with natural dredged sediment; the dehydration effect was even weaker than that of natural dredged sediment dehydration in the later stages of sedimentation. Meanwhile, this paper divided the settling process into different stages; the settlement coefficients and compaction settlement indexes in different settling stages can well reflect the flocculating performance of flocculants at each settling stage.

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Innovation in dewatering process of flotation tailings by study of particle interaction in colloidal environment

Cited by 9 publications

References 13 publications

Water Soluble Polymer Flocculants: Synthesis, Characterization, and Performance Assessment

Water Soluble Polymer Flocculants: Synthesis, Characterization, and Performance Assessment

Laboratory monitoring approaches for tailings settling and evaluation of flocculant and coagulant treatments

The Effect of Flocculants and Water Content on the Separation of Water from Dredged Sediment

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