Detailed Information on Publication Record
2008
Accumulation and biotransformation of arsenic by water bloom
MACHÁT, Jiří, Marie KONEČNÁ and Jiří ČMELÍKBasic information
Original name
Accumulation and biotransformation of arsenic by water bloom
Name in Czech
Akumulace a biotransformace arsenu vodním květem
Authors
MACHÁT, Jiří (203 Czech Republic, guarantor, belonging to the institution), Marie KONEČNÁ (203 Czech Republic, belonging to the institution) and Jiří ČMELÍK (203 Czech Republic, belonging to the institution)
Edition
SETAC Europe 18th Annual Meeting, 2008
Other information
Language
English
Type of outcome
Konferenční abstrakt
Field of Study
10406 Analytical chemistry
Country of publisher
Poland
Confidentiality degree
není předmětem státního či obchodního tajemství
RIV identification code
RIV/00216224:14310/08:00026409
Organization unit
Faculty of Science
Keywords in English
arsenic; biotransformation; speciation; cyanobacteria
Tags
International impact
Změněno: 29/4/2011 14:15, prof. RNDr. Luděk Bláha, Ph.D.
V originále
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.
In Czech
Biomasa sladkovodních sinic je známa svojí schopností vázat kovy. V této práci byla sledována sorpce a biotransformace arseničnanu vodním květem (převážně rod Microcystis). Biomasa byla kultivována v přítomnosti arseničnanu po dobu 138 hodin. Až 35% arsenu bylo nalezeno v biomase. Ve vodě i biomase byly sledovány specie arsenu. Byla pozorována kvantitativní redukce arseničnanu na arsenitan a následné uvolnění dimethylarseničnanu (DMA) do média. Monomethylarseničnan (MMA), DMA a obě anorganické specie byly stanoveny v biomase. Mimo tyto specie byly v biomase identifikovány také MMA(III) a arsenoribosidy. Přírodní biomasa obsahuje až 40% arsenu ve formě arsenoribosidu. Až 56% přidaného arseničnanu bylo methylováno sinicovou biomasou.
Links
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