**Microbial-Based Bioremediation of Selenium and Tellurium Compounds Tellurium Compounds**

**Microbial-Based Bioremediation of Selenium and** 

DOI: 10.5772/intechopen.72096

Elena Piacenza, Alessandro Presentato, Emanuele Zonaro, Silvia Lampis, Giovanni Vallini and Raymond J. Turner Emanuele Zonaro, Silvia Lampis, Giovanni Vallini and Raymond J. Turner Additional information is available at the end of the chapter

Elena Piacenza, Alessandro Presentato,

Additional information is available at the end of the chapter

http://dx.doi.org/10.5772/intechopen.72096

#### **Abstract**

[212] Ibrahim WM. Biosorption of heavy metal ions from aqueous solution by red macroal-

[213] Ullah I, Nadeem R, Iqbal M, Manzoor Q. Biosorption of chromium onto native and immobilized sugarcane bagasse waste biomass. Ecological Engineering. 2013;**60**:99-107

[214] Vijayaraghavan K, Teo TT, Balasubramanian R, Joshi UM. Application of sargassum biomass to remove heavy metal ions from synthetic multi-metal solutions and urban

[215] Rao RAK, Ikram S. Sorption studies of Cu (II) on gooseberry fruit (*Emblica officinalis*) and its removal from electroplating wastewater. Desalination. 2011;**277**:390-398 [216] Ay ÇÖ, Özcan AS, Erdoğan Y, Özcan A. Characterization of *Punica granatum* l. peels and quantitatively determination of its biosorption behavior towards lead (II) ions and

[217] Bairagi H, Khan MMR, Ray L, Guha AK. Adsorption profile of lead on *Aspergillus versicolor*: A mechanistic probing. Journal of Hazardous Materials. 2011;**186**:756-764 [218] Singh A, Kumar D, Gaur J. Continuous metal removal from solution and industrial effluents using *Spirogyra* biomass-packed column reactor. Water Research. 2012;**46**:779-788

[219] Vinodhini V, Das N. Relevant approach to assess the performance of sawdust as adsorbent of chromium (VI) ions from aqueous solutions. International Journal of

[220] Volesky B, Naja G. Biosorption: Application strategies. In: 16th International

[221] Barkley NP. Extraction of mercury from groundwater using immobilized algae. Journal

[222] Bates E, Herrmann J, Sanning D. The us environmental protection agency's site emerg-

[223] Jeffers TH, Bennett PG, Corwin RR. Biosorption of metal contaminants using immobilized biomass field studies. US Bureau of Mines, Report of investigations. 1993;

[224] Kuyucak N, St-Germain P. Passive Treatment Methods for Acid Mine Drainage. In: Hager JP, editor. EPD Congress 1993. Warrendale: TMS publisher; 1993. p. 319-331

[225] Kuyucak N, St-Germain P. In possible options for in-situ treatment of acid mine drainage seepages. In: International Land Reclamation and Mine Drainage Conference and

[226] Tsezos M, Noh S, Baird M. A batch reactor mass transfer kinetic model for immobilized

3rd International Conference on Abatement of Acid Drainage; 1994. pp. 26-29

biomass biosorption. Biotechnology and Bioengineering. 1988;**32**:545-553

storm water runoff. Journal of Hazardous Materials. 2009;**164**:1019-1023

acid blue 40. Colloids and Surfaces. B, Biointerfaces. 2012;**100**:197-204

Environmental Science and Technology. 2010;**7**:85-92

of the Air & Waste Management Association. 1991;**41**:1387-1393

Biohydrometallurgy Symposium; 2005. pp. 25-29

ing technology program. JAPCA. 1989;**39**:927-935

**9461**:1-10

116 Biosorption

gae. Journal of Hazardous Materials. 2011;**192**:1827-1835

The chalcogens selenium (Se) and tellurium (Te) are rare earth elements, which are mainly present in the environment as toxic oxyanions, due to the anthropogenic activities. Thus, the increased presence of these chalcogen-species in the environment and the contamination of wastewaters nearby processing facilities led to the necessity in developing remediation strategies aimed to detoxify waters, soils and sediments. Among the different decontamination approaches, those based on the ability of microorganisms to bioaccumulate, biomethylate or bioconvert Se- and/or Te-oxyanions are considered the leading strategy for achieving a safe and eco-friendly bioremediation of polluted sites. Recently, several technologies based on the use of bacterial pure cultures, bacterial biofilms or microbial consortia grown in reactors with different configurations have been explored for Se- and Te-decontamination purposes. Further, the majority of microorganisms able to process chalcogen-oxyanions have been described to generate valuable Se- and/or Te-nanomaterials as end-products of their bioconversion, whose potential applications in biomedicine, optoelectronics and environmental engineering are still under investigation. Here, the occurrence, the use and the toxicity of Se- and Te-compounds will be briefly overviewed, while the microbial mechanisms of chalcogen-oxyanions bioprocessing, as well as the microbialbased strategies used for bioremediation approaches will be extensively described.

**Keywords:** selenium, tellurium, bioremediation, microbial consortia, biological reactors
