Engineering sorption selectivity of a particular member of a gas pair (for example, O 2) using strong affinity for the membrane is technically workable, but has not yet proved successful under ...
During filtration the deposits of retained materials as well as fouling change the membrane surface and hence possible charge, steric and sorption interactions. In addition, changes in retention over time or in different water matrices may occur due to solute–solute interactions ( Fig. 2 E) as well as micropollutant–fouling layer ...
Filters (0.2 microns pore size) were challenged with high (up to 5* 10(5) EU) levels of bacterial endotoxin. When the endotoxin was dispersed in water, a more than 10 … Sorption of bacterial endotoxin and retention of bacteria by …
Therefore, in the modified membrane, the diffusion of boric acid was inhibited. Consequently, for the modified membrane, the boric acid retention rate was dramatically increased from 84.42% to 92.80%.
The main benefit of the adsorption membrane filtration (AMF) hybrid process is the higher efficiency and lower costs of the process as compared to the classical fixed bed column sorption. Sorbents can be used as very fine parti- cles which increase the interface area and results in enhancement of the process rate considerably [33].
In membrane filtration the mechanism of micropollutant sorption is a relatively new discovery that was facilitated through new analytical techniques. This …
The sorption isotherm of each gas was obtained at 25 °C up to a maximum pressure of 27 atm over the course of about five days. Similar to the permeation tests, a new film would be used for another gas sorption test for the purpose of maintaining similar thermal and processing histories for all PIM-1 films. 4.
Membrane sorption protocol. A bench-scale crossflow membrane filtration system was assembled to study the sorption of the four target compounds in microfiltration membranes. The system schematic is shown in Supplementary Data, Figure S1. The membrane sorption unit consisted of a 50-mm diameter circular filter holder (Sartorius, …
The sorption properties of the obtained resins for boron were investigated, and the best materials were selected for the AMF process. Tests with the hybrid ion exchange-membrane process. The hybrid process was studied with the resin that had the best sorption properties. The experimental set-up is shown in Fig. 1. The most important …
A short discussion of the thermodynamics and kinetics of the sorption process, with indication of the main mistakes reported in literature, is also given. ... Several techniques have been tested for treating organic and inorganic wastewaters including sorption [1,2,3,4,5,6,7], membrane filtration [8,9], reverse osmosis and, in recent …
Here, the main idea is to follow the live fluorescence on the membrane surface during the filtration in order to assess the dynamics of proteins sorption and accumulation. Filtration experiments were monitored using two systems: a Zeiss Axio Observer.Zlm inverted microscope equipped with fluorescence (details in 2.6) and an …
Fundamental theories and concepts discussed in this chapter pertain to the areas of (i) adsorption and equilibrium isotherms (ii) pressure-driven membrane filtration and its rejection...
The biofiltration process differs from filtration since together with physicochemical filtration and adsorption, it also promotes biological degradation or biotransformation of pollutants (Srivastava and Majumder, 2008).A typical setup of a biofilter is shown in Fig. 1.Biofilters may act as rapid rate filters by physically removing pollutants …
In membrane filtration the mechanism of micropollutant sorption is a relatively new discovery that was facilitated through new analytical techniques. This …
Water Sorption by Different Types of Filter Media Used for Particulate Matter Collection Under Varying Temperature and Humidity Conditions - PMC. Journal List. Int J …
Abstract Air pollution caused by the rapid development of industry has always been a great issue to the environment and human being's health. However, the efficient and persistent filtration to PM0.3 remains a great challenge. Herein, a self-powered filter with micro–nano composite structure composed of polybutanediol succinate (PBS) …
These methods could be classified into adsorption-, membrane-, chemical-, electric-, and photocatalytic-based treatments. This paper comprehensively and …
The article deals with the preparation and possibilities of using combined filtration sorption systems usable for the construction of folded filters or respirators. The studied materials are made of several structural layers—a filter membrane made of polymeric nanofibers, an adsorbent containing active carbon or porous silicon dioxide …
Abstract Possibility of performing deep purification of lithium hydroxide solutions to remove admixtures of alkaline-earth and transition metals, magnesium, aluminum, uranium, thorium, and radium radionuclides (strontium) by using the sorption and membrane methods has been examined. It was shown that successive procedures …
4. 1906-Bechhold devised a technique to prepare nitrocellulose membranes of graded pore size . 1930's-Micro porous colloidal membranes became commercially available. 1950's- Development n Significant use of MF technology in the filtration of drinking water samples at the end of World War II: Research effort was sponsored by US …
The main advantage of sorption-membrane filtration hybrid process is the opportunity of using very fine particles of the resin, which increases specific surface and results in faster kinetics.
... [18] The MEHS involve four unit operations, respectively: (1) chelation-based sorption, (2) membrane separation, (3) desorption, and (4) regeneration. [19] …
The sorption of dissolved PFOA onto filter membranes was determined using syringe-filtration. As no sorption of PFOA analyte was identified as occurring on the syringe-surfaces ( Table 1, supplementary material) likely due to short residence time (<10 s) in the syringes, the sorption losses were calculated using the difference between the ...
Therefore, this paper aims to show the performance of the described membranes in filtration processes currently used in the purification of water contaminated with microorganisms, toxic metal ions, …
They combine sorption on a boron selective resin (BSR) with membrane filtration [6], [7]. Hybrid processes reveal many advantages in comparison to the fixed bead systems [8] . The only one their disadvantage is a shortage of available fine BSR particles.
After filtration, the prepared GO membranes were peeled off of the filter and vacuum dried at 40 ... Considering the high water sorption in GO membranes, the GO membrane can be regarded as a physically assembled, loose hydrogel with charged ionic groups (e.g., carboxylic acid groups). Therefore, the hydration state of the GO …
This study was also conducted with 0.2 µm Millex ® hydrophilic PTFE syringe filters, with very similar results obtained (Figure 2).Membrane pore size did not significantly impact naproxen saturation of syringe filters. This concentration effect is membrane- and analyte-dependent and hence during filter validation studies, discard volume should be selected …
Water filtration tests were performed using a 75 mL solvent-resistant dead-end filtration cell for 47 mm membranes (XFUF04701) provided by Merck Millipore (Billerica, MA, USA) with an effective filtration surface of 15 cm 2.The hydrophobic membranes were first conditioned for 12 h in ethanol and then in the filtration cell with …
Scheme a. Electrooxidation for reducing membrane fouling. Scheme (a) in Figure 1 refers to pre-electrooxidation of feed water before its membrane filtration, aimed to alter the quantity and quality of water constituents and subsequently modify their interactions with the membrane [9, 10].. Among the works that studied electrochemical technology …
The membranes demonstrated sorption capacity of 159 and 102 mg g −1 for Pb 2+ and Cd 2+, respectively. Moreover, PAA was blended with sodium alginate (SA) to produce stable nanofibrous membranes. The PAA/SA membranes exhibited a high Cu 2+ sorption capacity of 591.7 mg g −1 with a high-water flux of 868.5 L m −2 h −1.