Coagulation and flocculation processes are often supported by the dosage of flocculant and coagulant aids. Coagulant aids are typically insoluble particulate …
At higher pH conditions bentonite dispersions are highly flocculated having high settling rates and low supernatant turbidity. The combined effect of salt …
To cite this article: G. P. Karmakar & K. K. Chandan (2019) Flocculation behaviour of bentonite clay-water systems, Advances in Materials and Processing Technologies, 5:2, 303-316, DOI:
In the slurry shield tunneling the quality of bentonite slurry plays an important role in the slurry shield TBM operation and the advance rate (Longchamp 2005). Hence, the ... Figure 2 Principle of coagulation and flocculation (Jeon 1993) PAC (Poly Aluminum Chloride, Al. 2 (OH) n. CL. 6-n) is a kind of inorganic polymer
bentonite flocculation test, which consist of dried bentonite particles and dehydrated anti-gen, were evaluated. Tests. The bentonite flocculation test used as the standard test for comparison in this eval-uation was performed as follows: Serums were diluted 1: 5, 1: 10, and 1: 20 with saline, and all positive serums were diluted serially to titer.
The flow behaviour of Wyoming bentonite dispersions was studied in water and water-alcohol mixtures (methanol, ethanol, n-propanol) with or without the addition of NaCl.The yield value τ o and relative apparent viscosity τ * rel (= τ * (dispersion/ τ * (medium) at γ = 94.5 s-1) increase to a maximum and then decrease with increasing …
where DF = driving force, C = solution concentration (mol/L or mg/L), and Cs = saturation concentration (mol/L or mg/L). Wang et al. specify that if DF is less than 1, the solution is undersaturated and no precipitation will occur.When DF is 1, the solution becomes saturated and is at equilibrium with any salt present in it.
Gumaste et al. investigated two types of electrolytes, NaCl and SrCl 2, in the sedimentation of sodium bentonite (90% Na-montmorillonite). The authors obtained an increase in suspension …
The bentonite flocculation test in the serology of tuberculosis. I. Purification of BCG antigens Can J Microbiol. 1968 Aug;14(8):881-5. doi: 10.1139/m68-148. Authors B B Diena, H Yugi, R Wallace, J Carriere, L Greenberg. PMID: 4875429 DOI: 10.1139/m68 ...
INTRODUCTION. The slurry shield TBM is a tunneling machine that is able to support the tunnel face with pressurized bentonite slurry pumped into the excavation chamber. The …
Bentonite is equally useful as a flocculation aid in the treatment of effluent from pulp and paper mills, being effective in the removal from these effluents of starch (Gillespie et al., 1970), ammonium-based spent sulphite liquor (Scherler, 1972), basic dyes (Mobius and Gunther, 1974), and colour and fines generally (Potskhershvili et al ...
Flocculation is understood to be a process where aggregates of lower density are formed in a three-dimensional way. Particles are not destabilized on an individual basis and do not collide individually as described in the concept of coagulation. ... clay-type substances are used to support the aggregation process, such as …
The rheological and colloidal properties of bentonite dispersions in the presence of organic compounds: I. Flow behaviour of sodium-bentonite in water-alcohol - Volume 29 Issue 5 ... (1970) Electron microscopic and kinetic study of the flocculation of calcium montmorillonite. ... Principles of flow of kaolin and bentonite dispersions.
The biopolymer produced by Anabaenopsis circularis strain PCC 6720 was found to be an effective anionic flocculant for bentonite suspensions. The presence of CaCl 2 increased the flocculation efficiency significantly. From adsorption isotherms and zeta-potential measurements, it was concluded that the flocculation process is based on the …
The bentonite flocculation test was used to differentiate antibodies formed by BCG vaccination from those produced by infections with virulent tubercle bacilli, and tuberculosis-like antibodies were demonstrated in sarcoidosis patients. Expand. 10. Save. Protein measurement with the Folin phenol reagent.
Flocculation of bentonite particles by a cyanobacterial bioflocculant @article{Levy1990FlocculationOB, title={Flocculation of bentonite particles by a cyanobacterial bioflocculant}, author={N. Levy and Yeshaya Bar-Or and Shlomo Magdassi}, journal={Colloids and Surfaces}, year={1990}, volume={48}, pages={337-349}, …
| Effects of chitosan MW (chitosans of 90% DD) and dose on bentonite turbidity reduction (horizontal stripes ¼ 5,000 Da; white ¼ 50,000 Da; black ¼ 100,000 Da; vertical stripes ¼ 600,000 Da ...
In this study, coagulation-flocculation treatment was conducted by pouring 200 mL of AMD sample into five 500 mL glass beakers and dosed with a varying …
The bentonite flocculation test in the serology of tuberculosis. II. Detection of tuberculosis in cattle Can J Microbiol. 1968 Aug;14(8):887-90. doi: 10.1139/m68-149. Authors R Wallace, J Carriere, B B Diena, L Greenberg. PMID: 4875430 DOI: 10.1139/m68 ...
Investigated the use of coagulation-flocculation with alum as a coagulant and Perlite or Bentonite as an accelerator to improve treatment efficiency. Perlite yielded higher removal rates for turbidity, conductivity, BOD, and COD compared to Bentonite. The optimal dosage of alum was determined to be 90 mg/L. Jurczyk and Koc-Jurczyk (2007)
Coagulation-flocculation systems use chemical agents known as coagulants. These substances have charges, generally positive, to destabilize the colloidal matter dispersed in the water (Teh & Wu, 2014).The neutralization of the colloids forms aggregates of greater size and density, known as flocs, which allow the sedimentation of …
The dewatering efficiency of bentonite-polymer-based slurry was better than that of bentonite-based slurry under the same flocculation conditions. Therefore, combining polymer and bentonite as ...
This study investigated the influence of the physico-chemical properties of methyl red (MR) and crystal violet (CV) on their removal by bentonite clay and polyaluminium chloride (PACl). Different dosages of bentonite clay, PACl and a combination of PACl and bentonite clay were applied. Dye concentration, dosage, pH …
In this study, ChCl:LA NADES was used as a coagulant aid with cationic/ anionic PAM as a flocculant for highly stable bentonite suspension. NADES was synthesized using LA and ChCl as the HBD and the HBA, respectively with a molar ratio …
properties of bentonite vary accordingly making it suitable for different applications [12,13]. In general, two classes of bentonite can be distinguished: sodium bentonite possessing a high swelling ability and non-swelling calcium bentonite which immediately disperse in water [9, 14].
Flocculation of Clay-Based Tailings: Differences of Kaolin and Sodium Montmorillonite in Salt Medium ... NaCl and SrCl 2, in the sedimentation of sodium bentonite (90% Na-montmorillonite). The authors obtained an increase in suspension dehydration by a factor of 87 when the ionic strength of the sedimentation fluid …
Complete the math worksheet for this lesson and return to instructor via email, fax or mail.. Each question is worth 20 points. Labs. Read the following jar test lab procedure. You may have test questions come from …
Fractionation of unheated bacillary extract of BCG has yielded a carbohydrate fraction which sensitizes bentonite to react with circulating antibodies to M. tuberculosis in human sera. This fraction does not contain tuberculin-like protein material in appreciable amount, but is rather a mixture of carbohydrates, varying in molecular size and all possessing …
fluid such as bentonite slurry to the surface via naturally occurring fractures or fissures. This study investigated a range of coagulants and flocculants for treating the bentonite …
DOI: 10.1016/0043-1354(92)90225-S Corpus ID: 97840136; Physico-chemical aspects in flocculation of bentonite suspensions by a cyanobacterial bioflocculant @article{Levy1992PhysicochemicalAI, title={Physico-chemical aspects in flocculation of bentonite suspensions by a cyanobacterial bioflocculant}, author={N. Levy and Shlomo …
