Review of the Jar Test

Black, Andrew P.; Buswell, A. M.; Eidsness, Fred A.; Black, Andy

doi:10.1002/j.1551-8833.1957.tb15498.x

Cited by 24 publications

(11 citation statements)

References 22 publications

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“…Since the measurement method of Bensadok et al [10] in a re-circulated system is somewhat complicated, we describe a simple procedure to determine the threshold value of specific charge. It is based on an old method, used in the industry as "conventional jar test" [11] in which the result of the effectivity of coagulation is checked through the measurement of the remaining concentration of the colloidal components in the supernatant phase of the flocculated and settled sample ("settled turbidity").…”

Section: Group a Electrocoagulation Experiments Experiments A1: The Bmentioning

confidence: 99%

Electrochemical dissolution of aluminium in electrocoagulation experiments

Fekete

Lengyel

Cserfalvi

et al. 2016

J Solid State Electrochem

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Six experiments are presented to highlight important features of aluminium dissolution when used in electrocoagulation procedure employed to remove oily contaminations from water. First, using a common oil-in-water emulsion: diluted milk, we show that the electrochemically generated coagulant ions are active only in the first few seconds following their generation -hence the electrocoagulation cells' construction should promote the mixing of the nascent Al colloid with the water phase. For this reason the use of the narrow-gap cells is suggested. Second, in experiments with Al-Al electrode pairs and dilute, neutral, unbuffered, aqueous solutions we (i) estimate the maximum amount of Al dissolution on the cathode, and (ii) show how the rate of Al dissolution changes with frequency if the cell voltage polarity is alternating.

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Section: Group a Electrocoagulation Experiments Experiments A1: The Bmentioning

confidence: 99%

Electrochemical dissolution of aluminium in electrocoagulation experiments

Fekete

Lengyel

Cserfalvi

et al. 2016

J Solid State Electrochem

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“…Jar tests have been used to evaluate the effectiveness of various coagulants and flocculants under a variety of operating conditions for water treatment. The procedures and evaluation process (Black et al 1957) and (Hudson 1981) have been adapted to dredged material (Schroeder 1983). However, conducting jar tests and interpreting the results to determine design parameters are not simple tasks because there are many variables that can affect the tests.…”

Section: J24 Oedometer Test (mentioning

confidence: 99%

Determining Dredge-Induced Turbidity and Sediment Plume Settling within an Intracoastal Waterway System

Wang

Beck

2017

Journal of Coastal Research

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“…The PSC and PFSC coagulants were prepared in the laboratory using the method developed by Gao et al (2003) and Yang et al (2004 (Black et al, 1957), which involved rapid mixing at 100 rpm for 1 min followed by slow mixing at 20 rpm for 10 min, was performed and then placed under quiescent conditions for 60 min to allow the flow to settle. Samples were obtained 3 cm below the water surface at 10 min intervals during settling to measure turbidity using an HACH 2100 turbidimeter.…”

Section: Preparation Of Pc Psc and Pfsc Coagulantsmentioning

confidence: 99%

Comparison of three coagulants by online turbidity monitoring

Cheng¹,

Kao²,

Yu³

2010

Proceedings of the Institution of Civil Engineers - Water Manag

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The removal of suspended algae by coagulation with polyaluminium chloride, polyaluminium silicate chloride and polyaluminium ferric silicate chloride was investigated by online turbidity monitoring. The experimental results indicate that although a smaller (compared with polyaluminium silicate chloride and polyaluminium ferric silicate chloride) polyaluminium chloride dose is required for coagulation, polyaluminium chloride is less efficient in producing large and settleable flocs. Thus, for both polyaluminium silicate chloride and polyaluminium ferric silicate chloride, which are hydrolytic co-polymeric products between metal ions and polysilicic acid, the efficiency of algal removal is enhanced by activated silicic acid. However, polysilicic acid may also decrease the positive charges carried by polyaluminium silicate chloride and polyaluminium ferric silicate chloride. Therefore, increased doses of polyaluminium silicate chloride and polyaluminium ferric silicate chloride are needed to flocculate the algal suspension effectively. Additionally, a new online nephelometric turbidimeter connected to a data-acquisition unit was used in this study for continuous measurement of the coagulated sample turbidity every second during rapid mixing, slow mixing and sedimentation. The experimental results thus obtained provided much better and more detailed information than conventional jar test results.

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Review of the Jar Test

Cited by 24 publications

References 22 publications

Electrochemical dissolution of aluminium in electrocoagulation experiments

Electrochemical dissolution of aluminium in electrocoagulation experiments

Determining Dredge-Induced Turbidity and Sediment Plume Settling within an Intracoastal Waterway System

Comparison of three coagulants by online turbidity monitoring

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