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Wastewater Treatment Approaches to Remove Microplastics
Published in Judith S. Weis, Francesca De Falco, Mariacristina Cocca, Polluting Textiles, 2022
Daniel Sol, Amanda Laca, Adriana Laca, Mario Díaz
The elutriation system is another methodology designed at lab scale for separating particles based on their size, shape and density by means of using a stream flow (gas or liquid) in a direction usually opposite to the direction of sedimentation (Prata et al., 2019; Ruggero et al., 2020; Sol et al., 2020; Zarfl, 2019). This process is employed to isolate microplastics from sediment samples. It consists of a column, whose size is between 147 and 186 cm in height and 10 and 15 cm in width, where a flow of liquid (usually water) is injected through the bottom of the elutriation column. At the top of the column there is the filtration device, and particles go upwards in the column so that microplastics are retained in the meshes of the filtration device. The optimization of the different parameters, such as temperature or flow stream, allows the separation of MPs from the impurities (Kedzierski et al., 2016; Kedzierski et al., 2017; Kedzierski et al., 2018; Zhu, 2015).
Introduction to Ceramic Fabrication Approaches Including Powder Processing
Published in David W. Richerson, William E. Lee, Modern Ceramic Engineering, 2018
David W. Richerson, William E. Lee
Elutriation is frequently used in the laboratory for obtaining very fine particle distributions free of large particles. The powder is mixed with water or other liquid and usually with a wetting agent and possibly a deflocculant2 to yield a dilute suspension. Stirring or mixing is stopped and settling is allowed to occur for a predetermined time. The time is based on the particle size cut desired. The fluid containing the fine particles is then decanted or siphoned and the remaining fluid and residue discarded or used for some other purpose.
Processing of recycled concrete aggregates
Published in François de Larrard, Horacio Colina, Concrete Recycling, 2019
B. Cazacliu, L. Le Guen, E. Hamard, S. Roux, S. Braymand
Elutriation separates particles based on their size, shape, and density, using a constant flow of gas or liquid in a direction usually opposite to the direction of sedimentation. The method was applied to narrow sieve fractions of recycled fine aggregates (Ulsen et al. 2013). It was observed that the cement paste and residual red ceramic particles decrease two times in heavy products compared to light ones. The method seemed effective since the natural aggregates had achieved a proper degree of liberation.
Effect of electro-codeposition parameters on particle incorporation in Ni-CrAlY(Ta) coatings
Published in Materials and Manufacturing Processes, 2021
Pre-alloyed CrAlY-based powders (Table 1) were used, including ball-milled CrAlY(Ta) powders made at Tennessee Technological University (TTU) and gas-atomized CrAlY powders purchased from Sandvik. Both types of powders were sieved through a 20-μm mesh. For ball-milled CrAlY powder, water elutriation was also used to obtain powder with a particle size range comparable to that of the gas-atomized powder. Water elutriation is a process by means of an upward current of water and particles of different sizes are separated according to their terminal velocities calculated from Stokes’ law.[20]