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Environmental fate & pathways

Bioaccumulation: aquatic / sediment

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Administrative data

Endpoint:
bioaccumulation in aquatic species, other
Type of information:
experimental study
Adequacy of study:
weight of evidence
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
study well documented, meets generally accepted scientific principles, acceptable for assessment

Data source

Reference
Reference Type:
publication
Title:
Bioaccumulation and biovolatilizationof various elements using filamentous fungus Scopulariopsis brevicaulis
Author:
Boriova K, Cernansky S, Matus P, Bujdos M, Simonovicova A
Year:
2014
Bibliographic source:
Letters in Applied Microbiology 59, 217-223

Materials and methods

Test guideline
Qualifier:
no guideline followed
Principles of method if other than guideline:
No standard guideline is applicable for this type of research work
GLP compliance:
no
Remarks:
no guideline study, but it is expected that GLP-principles were respected

Test material

Reference
Name:
Unnamed
Type:
Constituent
Specific details on test material used for the study:
TeO2 was also used as test substance in this study

Test organisms

Test organisms (species):
other: the filamentous fungus Scopulariopsis brevicaulis

Results and discussion

Bioaccumulation factor
Key result
Remarks on result:
other: no fixed BCF-value can be determined for Te; data are used in a weight of evidence approach

Applicant's summary and conclusion

Conclusions:
The aim of this paper was to quantify bioaccu mulation and subsequent biovolatilization of As(III), As (V), Se(IV), Se(VI), Sb(III), Sb(V), Te(IV), Te(VI), Hg (II), Tl(I) and Bi(III) by microscopic filamentous fungus Scopulariopsis brevicaulis under laboratory conditions. The filamentous S. brevicaulis fungus is a known methylator of arsenic and antimony, which indicated possible ability of methylating and volatilizing of other metals and metalloids. The S. brevicaulis 1524 strain was capable of accumulating and volatilizing all used chemical elements in all valence states under laboratory conditions when single-metal(loid) solutions were used. S. brevicaulis fungus was found to be the most suitable for Se(IV), Te(IV), Hg(II) and Bi(III) removal. The rate and amount of biovolatilized Te in the filamentous fungus Scopulariopsis brevicaulis also appeared to be concentration-dependent, which suggest that this organism actively tried to regulate the internal concentration levels.
Executive summary:

Biovolatilization and bioaccumulation capabilities of different elements by microscopic filamentous fungus Scopulariopsis brevicaulis were observed. Accumulation of As(III), As(V), Se(IV), Se(VI), Sb(III), Sb(V), Te(IV), Te(VI), Hg(II), Tl(I) and Bi(III) by S. brevicaulis was quantified by analysing the amount of elements in biomass of the fungus using ICP AAS. The highest amounts of bioaccumulated metal(loid)s were obtained as follows: Bi(III) > Te (IV) > Hg(II) > Se(IV) > Te(VI) > Sb(III) at different initial contents, with Bi (III) accumulation approximately 87%. The highest percentages of volatilization were found using Hg(II) (50%) and Se(IV) (465%); it was also demonstrated with all studied elements. This proved the biovolatilization ability of microscopic fungi under aerobic conditions. The highest removed amount was observed using Hg(II) (95-30%), and more than 80% of Se(IV), Te(IV), Bi(III) and Hg(II) was removed by bioaccumulation and biovolatilization, which implies the possibilities of use of these processes for bioremediations. There were reported significant differences between bioaccumulation and biovolatilization of almost all applied metal(loid)s if valence is mentioned.