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Anionic reactive membranes

Elektorowicz and Hakimipour (2001,2003a) presented a technology that permitted the simultaneous removal of heavy metals and PAHs from natural soil called Simultaneous Electrokinetic Removal of Inorganic and Organic Pollutants (SEKRIOP). This technology used EDTA for metal mobility and zwitterionic surfactants for hydrocarbon mobility. Furthermore, the application of cationic reactive membranes permitted capturing free metallic ions generated by electrokinetic phenomena before their precipitation in the cathode area. The capture of metal-EDTA complexes was done on anionic reactive membranes. [Pg.322]

The presence of some lead contents close to the anode area was directly related to the effectiveness of EDTA in the mobilization of lead. Lead has a strong affinity for clay soil and has a higher power of exchange with soils than other heavy metals. The highest removal of lead was observed when EDTA was supplied during the first period of treatment in the electrokinetic process. This removal was more than two times higher than those shown in the control cell Cl. Due to a low metal mobility, the response of membranes in control cells was much lower than in other cells. Due to a high stability of lead-EDTA complexes, the anion reactive membranes captured more than 30 times lead complexes than cation ones. [Pg.326]

Membrane fouling due to adsorption of polyelectrolytes (such as humic acids, surfactants, and proteins) may severely reduce ion permeability, especially in the anion-exchange membranes. However, exhausted anion-exchange membranes used in the ED of molasses, whey, citric acid, or sodium dodecyl-benzenesulfonate can be reactivated by circulating simultaneously an acidic solution in one compartment and an alkaline solution in the other one, both solutions at titres greater than 0.1 kmol/m3 (Tokuyama Soda Co., 1983). [Pg.280]

Tokuyama Soda Co., Ltd., Japan. 1983. Reactivation of spent anion exchange membrane used in food processing. Jpn. Kokai Tokkyo Koho JP no. 58,122,006, July, 20th, 1983. [Pg.359]

Liu CH, Wu JS, Chiu HC, Suen SY, Chu KH. Removal of anionic reactive dyes from water using anion exchange membranes as adsorbers. Water Res 2007 41(7) 1491-500. [Pg.72]

Hossain, M. A. Lim, Y Lee, S. Jang, H. Choi, S. Hong, T. Jin, L. Kim, W. G., Synthesis and characterization of tetra-imidazolium hydroxides poly(fluorenylene ether sulfone) anion exchange membranes. Reactive and Functional Polymers 2013, 73(9), 1299-1305. [Pg.533]

Several different changes in mitochondria occur during apoptosis. These include a change in membrane potential (usually depolarization), increased production of reactive oxygen species, potassium channel activation, calcium ion uptake, increased membrane permeability and release of cytochrome c and apoptosis inducing factor (AIF) [25]. Increased permeability of the mitochondrial membranes is a pivotal event in apoptosis and appears to result from the formation of pores in the membrane the proteins that form such permeability transition pores (PTP) may include a voltage-dependent anion channel (VDAC), the adenine nucleotide translocator, cyclophilin D, the peripheral benzodiazepine receptor, hexokinase and... [Pg.610]

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See also in sourсe #XX -- [ Pg.322 , Pg.326 ]



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Anionic membranes

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