Polymeric sorbents for selective chromium removal

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22320%2F16%3A43902388" target="_blank" >RIV/60461373:22320/16:43902388 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Polymeric sorbents for selective chromium removal

Popis výsledku v původním jazyce

Speciation of chromium in waters depends mainly on its oxidation state and pH. With some simplification, trivalent chromium, Cr(III), is present in the cationic form, while hexavalent chromium, Cr(VI), is present in the form of oxoanions. When dealing with waters containing low levels of other ions both Cr(III) and Cr(VI) species can be easily removed using commercially available strong acid and strong base ion exchangers. In the presence of other ions, that can compete for the ion exchange sites, we have to look for selective ion exchangers. The dark side of high selectivity is the stability of complexes of our target metal with functional groups of ion exchanger or sorbent. It can result to difficult or impossible regeneration. Resulting inability to reuse the sorbent increases the price of treated water. There is no ideal sorbent for Cr(III) or Cr(VI) in every water matrix, but there is plenty of clever ways how to remove the chromium species we can choose from.

Název v anglickém jazyce

Polymeric sorbents for selective chromium removal

Popis výsledku anglicky

Speciation of chromium in waters depends mainly on its oxidation state and pH. With some simplification, trivalent chromium, Cr(III), is present in the cationic form, while hexavalent chromium, Cr(VI), is present in the form of oxoanions. When dealing with waters containing low levels of other ions both Cr(III) and Cr(VI) species can be easily removed using commercially available strong acid and strong base ion exchangers. In the presence of other ions, that can compete for the ion exchange sites, we have to look for selective ion exchangers. The dark side of high selectivity is the stability of complexes of our target metal with functional groups of ion exchanger or sorbent. It can result to difficult or impossible regeneration. Resulting inability to reuse the sorbent increases the price of treated water. There is no ideal sorbent for Cr(III) or Cr(VI) in every water matrix, but there is plenty of clever ways how to remove the chromium species we can choose from.

Druh

C - Kapitola v odborné knize

CEP obor

DJ - Znečištění a kontrola vody

OECD FORD obor

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Projekt

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Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2016

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název knihy nebo sborníku

Innovative Materials and Methods for Water Treatment: Solutions for Arsenic and Chromium Removal

ISBN

978-1-138-02749-7

Počet stran výsledku

8

Strana od-do

109-116

Počet stran knihy

438

Název nakladatele

Taylor &amp; Francis Group

Místo vydání

London

Kód UT WoS kapitoly

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