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https://doi.org/10.37358/Rev.Chim.1949

OSIM Nr. R102355
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Revista de Chimie (Rev. Chim.), Year 2014, Volume 65, Issue 12,





Cristina Modrogan, Oanamari Daniela Orbulet, Alexandra Raluca Miron
Nitrate Removal from Water using Exchange Resins

Abstract:

Nitrates are very soluble and do not bind to soils, therefore, they have a high potential to migrate to groundwater sources. When these groundwaters are purposed for potable drinking water sources, the presence of nitrates can pose serious health risks, especially for infants and pregnant women. The main purpose of this paper is the study of nitrate removal from contaminated waters using two ion exchangers (A520 E and A 100). The equilibrium process can be well described by both Freundlich and Langmuir models, at 20 and 30oC. The dependence of thermodynamic water retention capacity on the concentration of a solute is to be described by an e-function experimentally confirmed in the literature. Process parameters including temperature and the initial concentration were examined and the obtained data being modeled using three kinetic models, respectively the pseudo-first-order equation, the pseudo-second-order and the pore diffusion. The best experimental adsorption data were obtained by means of pore diffusion and pseudo-second-order models. Keywords: Purolite A 520 E and A 100, nitrate, ion exchange, pollution prevention, kinetic study


Issue: 2014, Volume 65, Issue 12
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