Accumulation and biotransformation of arsenic by water bloom

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F08%3A00026409" target="_blank" >RIV/00216224:14310/08:00026409 - 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

Accumulation and biotransformation of arsenic by water bloom

Popis výsledku v původním jazyce

Biomass of freshwater cyanobacteria (water bloom) is well known as an efficient biosorbent for heavy metal ions. In this work sorption and biotransformation of arsenate by water bloom (predominantly Microcystis sp.) has been studied. Biomass was cultivated in natural water enriched by arsenate for 138 hours. Up to 35% of arsenic has been found associated with biomass. Arsenic species in water and biomass were determined. Quantitative reduction of arsenate to arsenite followed by biomethylation and releasing mainly dimethylarsinate (DMA) into water were observed. Monomethylarsonate (MMA), DMA and both inorganic species were determined in biomass extract. Besides these species, several unknown As species were found in biomass and identified by further techniques as MMA(III) and arsenoribosides. Natural biomass contains 40% As in form of arsenoriboside. Up to 56% of arsenate content in water has been methylated by cyanobacterial biomass.

Název v anglickém jazyce

Accumulation and biotransformation of arsenic by water bloom

Popis výsledku anglicky

Biomass of freshwater cyanobacteria (water bloom) is well known as an efficient biosorbent for heavy metal ions. In this work sorption and biotransformation of arsenate by water bloom (predominantly Microcystis sp.) has been studied. Biomass was cultivated in natural water enriched by arsenate for 138 hours. Up to 35% of arsenic has been found associated with biomass. Arsenic species in water and biomass were determined. Quantitative reduction of arsenate to arsenite followed by biomethylation and releasing mainly dimethylarsinate (DMA) into water were observed. Monomethylarsonate (MMA), DMA and both inorganic species were determined in biomass extract. Besides these species, several unknown As species were found in biomass and identified by further techniques as MMA(III) and arsenoribosides. Natural biomass contains 40% As in form of arsenoriboside. Up to 56% of arsenate content in water has been methylated by cyanobacterial biomass.

Druh

O - Ostatní výsledky

CEP obor

CB - Analytická chemie, separace

OECD FORD obor

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Projekt

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Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2008

Kód důvěrnosti údajů

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