Removal of organic pollutant from

Tubular reactors are used for reactions involving a gas and a liquid. In this arrangement, the gas phase is dispersed as bubbles at the bottom of a tubular vessel. The bubbles then rise through the continuous liquid phase that flows downwards as shown in Figure 4-14. An example of this process is the removal of organic pollutants from water by noncatalytic oxidation with pure oxygen. 

Solvent extraction has many features that make this separation technique applicable for the removal of organic pollutants from wastewater. The organic solutes can be recovered, and there is thus a potential for economic credit to the operation. In comparison with biological treatment, it is not subject to toxicity instabilities. The disadvantage is that, even with solvents having low solubilities in water, solvent losses can be substantial owing to... 

Nevertheless, liquid-phase adsorption fundamentally onto activated carbon [2,85], silica [2,86,87], zeolites [2,88,89], and resins [90] provides a feasible technique, and is one of the most extensively used technologies for removal of organic pollutants from industrial wastewater [2,8,84-90],... 

Panizza, M. and Cerisola, G. (2001) Removal of organic pollutants from industrial wastewater by electrogenerated Fenton s reagent. Water Res. 35, 3987-3992. 

Anodic oxidation was shown to be a useful method for the removal of organic pollutants from aqueous solutions [15]. Partial decomposition of hazardous organic compounds to biodegradable compounds or complete decomposition to H2O and CO2 can be achieved by the electrochemical treatment of waste [14]. Two different categories of electrochemical treatment of waste-water or waste can be distinguished ... 

The effectiveness of activated carbon for the removal of organic pollutants from water by carbon adsorption is enhanced by its large surface area, an important factor in the adsorption process. The surface area of activated carbon typically can range from 500 to 1400 nP/g. Table 2 presents the surface areas of several commercially available activated carbons (6). Some have large surface areas as high as 2500 aP/g. 

Removal of organic pollutants from wastewaters using ELMs... 

Titania Titania has three common polymorphs, anatase, rutile, and brookite, and is widely used as a white pigment The technological applications are as a photocatalyst [293], the removal of organic pollutants from water, and in photovoltaic devices [294] which convert light to electricity. Bulk titania is a n-type semiconductor, the conductivity of which can be enhanced by either reduction or doping. 

Activated carbon Hydrophobic surface, favors organics over air or water Removal of organic pollutants from aqueous and gaseous effluents Cheapest hydrophobic adsorbent, workhorse of the pollution-control business Difficult to regenerate if fouling occurs, sometimes can catch fire during regeneration... 

M. Akhtar, S.M. Hasany, M.I. Bhanger, and S. Iqbal, "Sorption potential of Moringa oleifera pods for the removal of organic pollutants from aqueous solutions". Journal of Hazardous Materials, Vol. 141, pp. 546-556,2007a. 

S. Alila and S. Boufi, "Removal of organic pollutants from water by modified cellulose fibres", Ind. Crops Prod., Vol. 30, issu 1, pp. 93-104,2009. 

Neutral nonfimctionalized macroporous adsorbents were suggested for the removal of organic pollutants from all types of waste and drinking waters and industrial gas emissions. On an analytical scale macroporous polystyrene adsorbents, both functionafized and nonfunctionafized, gained wide acceptance as stationary phases in gas and liquid chromatography, as well as sorbents for solid-phase extraction of organic components from... 

Photoactivated titanium dioxide will also catalyse the oxidative degradation of organic material in solution. Such photocatalytic oxidation reactions are applied very successfully in treatment and removal of organic pollutants from water and from air. Solar photocatal) ic degradation of pollutants or bacteria in water could also provide a cheap and facile route to clean water in parts of the world where traditional water-purifying infrastructure is not available. 

Hwang, Y. L., G. E. Keller II, and J. D. Olson, Steam Stripping for Removal of Organic Pollutants from Water. 1. Stripping Effectiveness and Stripping Design, p. 1753 Part 2, Vapor-Liquid Equilibrium Data, p. 1759, Ind. Eng. Chem. Research, 31, (1992 a, b). 

Rashed, M. N. (2011). Adsorption technique for the removal of organic pollutants from water and wastewater. In M. N. Rashed (Ed.), Organic pollutants-Monitoring risk and treatment (pp. 167-194). In-Tech. Available from http //hbrary.umac.mo/ebooks/b28046055.pdf. Accessed March 2014. 

Zhang H, Quan X, Chen S, Zhao H and Zhao Y (2006a), Fabrication of photocatalytic membrane and evaluation its efficiency in removal of organic pollutants from water , Sep PurifTechnol, 50,147-155. 

Cansado IPP, Galacho C, Nunes AS, Carrott MLR, Carrott PJM (2010) Adsorption properties of activated carbons prepared from recycled PET in the removal of organic pollutants from aqueous solutions. Adsorpt Sci Technol 28(8-9) 807-821... 

The removal of organic pollutants from the surface of supports for microelectronics purposes is conducted by UV/ozone treatment [157]. 

Phan, T. N. T., Bacquet, M., Morcellet, M. The removal of organic pollutants from water using new silica-supported cyclodextrin derivatives. React FundPolym. 2002, 52,117-125. 

Liquid-phase photoreactors Feasibility for large capacity Very good heat transfer performance More efficient removal of organic pollutants from water while using adsorptive material Inherent inefficiencies introduced by light absorption or scattering in the particle suspension medium Photocatalyst attrition Possible photocatalyst fouling or washout... 

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