The Fate of Selected Risk Elements in Constructed Wetlands Studied by AAS and Flame Photometry

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60076658%3A12220%2F18%3A43898370" target="_blank" >RIV/60076658:12220/18:43898370 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

čeština

Název v původním jazyce

The Fate of Selected Risk Elements in Constructed Wetlands Studied by AAS and Flame Photometry

Popis výsledku v původním jazyce

Methods of the trace element analysis (AAS and flame photometry) were used to study the fate of Cr, Pb, Cd, Mo, V, Be, Ba, As, Ni, Co, Sr, Li, Rb, Cu, Zn, Fe, and Mn in two constructed wetlands serving to treat municipal wastewater. The efficiency of the removal of some elements (Cd, Zn, Cu) was rather high whereas other ones (Sr, Rb, Li) were removed with poor efficiency. Fe, As, and V were even released to treated water which means that their outflow concentrations were higher than the inflow concentrations. The fate of studied elements in constructed wetlands is closely connected with the chemism of S and Fe in these systems. Under anaerobic conditions, when sulphates are reduced to H2S, some elements can be precipitated as hardly soluble sulphides forming sediments in the wetlands and are thus removed from wastewater. Reoxidation of Fe-II to Fe-III can also proceed close to the roots and rhizomes of the wetland plants. Thus, the precipitate of Fe2O3 is formed and some contaminants can be coprecipitated. The assimilation of some elements by the wetland plants should also be considered. In addition to suspended solids, organics and nitrogen compounds, constructed wetlands can remove some risk elements from treated water as well. They can serve as a suitable alternative to traditional mechanical-biological wastewater treatment plants in the case of small villages.

Název v anglickém jazyce

The fate of selected risk elements in constructed wetlands studied by AAS and flame photometry

Popis výsledku anglicky

Methods of the trace element analysis (AAS and flame photometry) were used to study the fate of Cr, Pb, Cd, Mo, V, Be, Ba, As, Ni, Co, Sr, Li, Rb, Cu, Zn, Fe, and Mn in two constructed wetlands serving to treat municipal wastewater. The efficiency of the removal of some elements (Cd, Zn, Cu) was rather high whereas other ones (Sr, Rb, Li) were removed with poor efficiency. Fe, As, and V were even released to treated water which means that their outflow concentrations were higher than the inflow concentrations. The fate of studied elements in constructed wetlands is closely connected with the chemism of S and Fe in these systems. Under anaerobic conditions, when sulphates are reduced to H2S, some elements can be precipitated as hardly soluble sulphides forming sediments in the wetlands and are thus removed from wastewater. Reoxidation of FeII to FeIII can also proceed close to the roots and rhizomes of the wetland plants. Thus, the precipitate of Fe2O3 is formed and some contaminants can be coprecipitated. The assimilation of some elements by the wetland plants should also be considered. In addition to suspended solids, organics and nitrogen compounds, constructed wetlands can remove some risk elements from treated water as well. They can serve as a suitable alternative to traditional mechanical-biological wastewater treatment plants in the case of small villages.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

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OECD FORD obor

40401 - Agricultural biotechnology and food biotechnology

Projekt

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Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2018

Kód důvěrnosti údajů

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

Název periodika

Chemické listy

ISSN

0009-2770

e-ISSN

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Svazek periodika

112

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

CZ - Česká republika

Počet stran výsledku

5

Strana od-do

191-195

Kód UT WoS článku

000429220900008

EID výsledku v databázi Scopus

2-s2.0-85045509646