Accumulation and biotransformation of arsenic by water bloom

MACHÁT, Jiří, Marie KONEČNÁ and Jiří ČMELÍK. Accumulation and biotransformation of arsenic by water bloom. In SETAC Europe 18th Annual Meeting. 2008.

Basic 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

• Original language: English
• Type of outcome: Conference abstract
• Field of Study: 10406 Analytical chemistry
• Country of publisher: Poland
• Confidentiality degree: is not subject to a state or trade secret
• RIV identification code: RIV/00216224:14310/08:00026409
• Organization unit: Faculty of Science
• Keywords in English: arsenic; biotransformation; speciation; cyanobacteria
• Tags: arsenic, biotransformation, cyanobacteria, Speciation
• Tags: International impact

Abstract

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.

Abstract (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

• MSM0021622412, plan (intention): Name: Interakce mezi chemickými látkami, prostředím a biologickými systémy a jejich důsledky na globální, regionální a lokální úrovni (INCHEMBIOL) (Acronym: INCHEMBIOL)

Investor: Ministry of Education, Youth and Sports of the CR, Interactions among the chemicals, environment and biological systems and their consequences on the global, regional and local scales (INCHEMBIOL)