Search Results

You are looking at 1 - 10 of 2,520 items :

Clear All

sorbents made by carbonization of synthetic polymers (in Polish). Przemysł Chemiczny 88, 1029-1032. Lorenc-Grabowska, E., Gryglewicz, G. & Machnikowski, J. (2007). Suitability of coal/pitch-PET mixture for activated carbon production. International Conference on Coal Science and Technology, Nottingham. Marzec, M., Tryba, B., Kaleńczuk, R. & Morawski, A. (2001). Active carbons obtained from PET waste for THMS (trihalomethanes) adsorption with water (in Polish). Gaz, Woda i Technika Sanitarna 6, 214-219. Marzec, M., Tryba, B., Kaleńczuk, R. & Morawski, A. (1999

sorbent, and 213 Bi is eluted with various complexing agents. The initial activity of the generator [not more than 1.8–3.7 GBq (50–100 mCi)] is limited not only by 225 Ac production capabilities but also by the radiation resistance of the sorbents used in the generator. Since the technology of 225 Ac production developed in INR RAS allows increasing the activity of 213 Bi injected into a patient (estimated maximum tolerated dose is up to 6 GBq (about 160 mCi) [ 5 ]), both radiation and radiolytic destruction of the sorbent also grow up [ 17 ]. Therefore, it is

synthetic sorbents for the decontamination from cholera vibrio”, Chemistry & Technology of Water, 20, (1998), pp. 330–335. [11] V.V. Strelko, N.M. Openko, O.A. Gluschachenko, T.I. Denisova D.I. Shvets: “Bactericidal sorption material for the purification of water from cholerae vibrio and method of it's obtaining”, Patent of Ukraine, N17528, (1998), Publ. 31.10.94, Bull. No. 5. [12] I.B. Slinyakova and T.I. Denisova: Organosilica adsorbents. Obtaining, properties, application, Naukova dumka, Kiev, 1988. [13] V.V. Strelko, T.I. Denisova, S.I. Meleshevich, D.I. Shvetz

polyurethane foams based on recycled poly(ethylene terephthalate) for oil sorption , Research article SCI 2012. 11. Kowarska B., Baron J., Kandefer S., Żukowski W.: Spent Bentonite Sorbent Cleaning Process, Czasopismo Techniczne Technical Transactions Environmental Engeineering, 1-ś/2012.

, precipitation, sorption, ion exchange, extraction and cementation. Each of these have some advantages and disadvantages. However, the main disadvantage is the high costs. It is considered that sorption is one of the most effective and affordable methods [ 6 – 8 , 10 ]. Until now, sorbents of different origin, efficiency and costs are used. But recently increasing attention is paid to the sorbents which are made on the basis of natural materials such as waste products of agriculture and food industry [ 16 ]. Some previously studied sorbents are effective for sorption of one

;194:306-15. DOI: 10.1016/j.chemosphere.2017.11.180. [25] Basar CA. J Hazard Mater B. 2006;135:232-41. DOI: 10.1016/j.jhazmat.2005.11.055. [26] Allen SJ, Gan Q, Matthews R, Johnson PA. Biores Technol. 2003;88:143-52. DOI: 10.1016/S0048-9697(03)00133-5. [27] Crini G, Badot P-M. Sorption Processes and Pollution. Conventional and Non-conventional Sorbents for Pollutant Removal from Wastewaters. Presses Universitaires de Franche-Comte. Universite de Franche-Comte. 2010. ISBN: 9782848673042. [28] Temkin, MI, Pyzhev V. Acta Physicochim URSS. 1940;12(3):217-22. [29] Hadi M, Samarghandi

generated, scrubbers are divided as once through or regenerable. The once-through scrubber system is where the spent sorbent is disposed as waste or used as a byproduct, whereas regenerable systems are where the sorbent is recycled back into the system (Cooper and Alley 1994). Regenerable processes have higher costs compared with once-through processes. However, regenerable systems can still be a better choice if space and disposal options are limited and markets for the byproducts (gypsum) are available. Both once-through and regenerable systems can further be

advantages such as high removal efficiencies, applicability for various concentrations, lack of sludge production, sorbent versatility, etc. (Wan Ngah and Hanafiah 2008, Wang and Chen 2009, Barakat 2011, Fu and Wang 2011). A wide range of solid materials that are suitable as sorbents for heavy metal ions is available. Among them, activated carbon, cross-linked polystyrenes, polyurethane foam (PUF), silica gel and inorganic oxides are of special importance. In the past years, PUF has attained considerably attention due to its efficiency, low cost and easily handling and

Chromium (Cr) is an important raw material in some chemical industries including paint, pigments, textiles, leather tanning, steel fabrication, electroplating, cement preservation, and canning industries. Once in the environment, Cr exists in various oxidation states depending on pH and concentration. Trivalent [Cr(III)] and hexavalent [Cr(VI)] forms are the most common with Cr(VI) being the most toxic to biota. The review discusses various types of polymeric sorbents that have been prepared for the extraction of Cr(VI) from environmental samples, mostly aqueous samples. Sorbents are categorized into biosorbents, hybrid sorbents, synthetic polymeric, and modified natural polymeric sorbents. Most of the emphasis will be on the advantages and disadvantages of different synthetic polymeric sorbents. Important parameters that define the performance of the sorbents, that is, binding capacity, equilibration time, optimum sample pH, and selectivity, are compared.

dehydrating representatives supporting pyrolytic decomposition and suppressing the tar creation. KOH and ZnCl 2 belong to among the most frequently used compounds for the production of sorbents [ 16 ]. Universally, physical activation covers a carbonization and activation stage. For activation, steam and carbon dioxide are the most shared elements, pronouncedly prompting the porosity of the resulting material [ 17 ]. Most predecessors which are practical for the production of ACs are organic carbon-rich materials. Natural wastes can be taken into account to be a very