Manganese removal by newly synthesized TiO2-based adsorbent during drinking water treatment

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388980%3A_____%2F22%3A00560372" target="_blank" >RIV/61388980:_____/22:00560372 - isvavai.cz</a>

Alternative codes found

RIV/67985874:_____/22:00560372

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Manganese removal by newly synthesized TiO2-based adsorbent during drinking water treatment

Original language description

Manganese (Mn) is a natural element commonly occurring in many water resources, especially in groundwaters. However, its presence in drinking water is undesirable and causes several operational and aesthetic problems and health risks. Mn concentrations in water exceeding only 0.1 mg L−1 already negatively affect its organoleptic properties, especially taste, odour, and colour (Griffin, 1960). Increased concentration of Mn might be an undesirable nutrient substrate for the development of bacteria in water distribution networks (Casey, 2009). From these findings, it is clear that maintaining acceptable concentrations of this element in drinking water is of great importance. Conventional methods used for demanganization are based on the conversion of soluble Mn2+ to insoluble removable precipitates. In theory, oxidation of Mn2+ can be achieved by atmospheric oxygen via mechanical aeration of water, but the oxidation rate is very slow and pH dependent, and alkalization is necessary to enhance the process (Hem, 1963). Among other methods of Mn removal are adsorption or cation-exchange. Most adsorbents are more or less efficient for Mn removal from aqueous solution, but the required dose is mostly very high, which makes these methods expensive. However, the newly synthesized TiO2-based adsorbent showed recently a very high efficiency for heavy metals or selected radionuclides (Motlochova et al., 2019,2020), therefore, it is expected to be effective for Mn2+ removal as well. This research aimed to assess its efficiency for Mn2+ removal and investigate the effects of solution conditions such as pH and the presence of co-existing ions on Mn2+ removal.

Czech name

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Czech description

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Type

O - Miscellaneous

CEP classification

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OECD FORD branch

10402 - Inorganic and nuclear chemistry

Project

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Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2022

Confidentiality

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