In this paper, the effects of several factors such as surfactant concentration, solute concentration, impeller speed and holdup on the mean drop diameter ( ) during emulsification have been studied in a single-stage mixer-settler extractor. A video technique has been developed in order to measure drop size distribution in the mixing chamber using a digital camera. The results show decreases wi...

An iterative numerical technique has been developed to simulate in detail the dynamics of a shallow-layer gravity settler. Currently acknowledged models apply only to specific equipments at steady-state and laboratory scale [Jeelani SAK, Hartland S. The continuous separation of liquid/liquid dispersions. Chem Eng Sci 1993;48(2):239–54]. To our knowledge, no study has ever addressed the dynamic ...

Computational fluid dynamic (CFD) simulation is an effective research approach for understanding velocity fields used in process and equipment intensification. It was found that mixer-settler used in rare earth metal extraction process was unsatisfying in large amount of liquid backlogged, high energy consumption and longtime settling process. In this paper, CFD simulations and experiment valid...

Understanding settler colonialism as an ongoing structure rather than a past historical event serves as the basis for an historically grounded and inclusive analysis of U.S. race and gender formation. The settler goal of seizing and establishing property rights over land and resources required the removal of indigenes, which was accomplished by various forms of direct and indirect violence, inc...

Conventional water treatment plant generates two types of process wastes, filter back wash water and sludge. Characteristic studies of these wastes reveals that it contains high solids content, metals and bacteriological concentration, which are generally more than permissible disposable standards. Direct disposal of these wastes in to natural stream pollutes the receiving streams, affects huma...

The extraction of rhenium from molybdenite roasting dust leach solution was performed using a mixersettler extractor by tributyl phosphate (TBP) diluted in kerosene as the extractant. In the single-stage extraction experiments, effect of the aqueous to organic phase ratios, Qa/Qo, and the number of extraction stages, N, on the rhenium extraction was studied. It was found that using the phase ra...

A new 1-D model for the secondary clarifier was recently presented. The decisive difference to traditional layer models is that every detail of the implementation is in accordance with existing PDE theory. Moreover this new model does not only focus on hindered settling but also allows accounting for compressive settling. In this contribution, the behaviour of this new settler model is compared...

in this paper, the effects of several factors such as surfactant concentration, solute concentration, impeller speed and holdup on the mean drop diameter ( ) during emulsification have been studied in a single-stage mixer-settler extractor. a video technique has been developed in order to measure drop size distribution in the mixing chamber using a digital camera. the results show decreases wit...

In a recent comment, David Albouy claims that the data series we constructed for European settler mortality in Acemoglu, Johnson and Robinson (2001) suffers from “inconsistencies, questionable judgements, and errors.” He proposes two series, for “barracks” and “campaigns,” that he claims are better measures of settler mortality, and shows his recodings weaken or eliminate the first-stage relati...

SOCIOLOGISTS INFORMED BY CRITICAL, anticolonial praxis are called to reflexively consider social realties as they are, while actively participating in social transformation. I write from my position as a settler in Misâskwatôminihk (Saskatoon) on Treaty 6 territory and the homeland of the Métis and as an engaged sociologist. By settler, I do not simply mean “non-Indigenous”—like many non-Indige...