Roxarsone study makes cover of Environmental Science and Technology. News stories in the Pittsburgh Post Gazette and Baltimore Sun.

Stolz, J.F., Perera, E., Kilonzo, B., Kail, B., Crable, B., Fisher, E., Ranganathan, M., Wormer, L., and Basu, P. 2007. Biotransformation of 3-nitro-4-hydroxybenzene arsonic acid and release of inorganic arsenic by Clostridium species. Environ. Sci. Tech. 41:818-823.

The study demonstrated the rapid biotransformation of roxarsone under anaerobic conditions by Clostridium species in chicken litter enrichments and a pure culture of a fresh water arsenate respiring species (Clostridium sp. strain OhILAs). The main products were 3-amino-4-hydroxybenzene arsonic acid and inorganic arsenic. Growth experiments and genomic analysis indicated that strain OhILAs might use roxarsone as a terminal electron acceptor for anaerobic respiration. The results suggest that the organic-rich manure and anaerobic conditions typically associated with composting provide the conditions necessary for the native microbial populations to transform the roxarsone in the litter releasing the more toxic inorganic arsenic.

 

CURRENT FUNDING

NSF-GEG: Biogeochemical controls on the dynamics of  organoarsenic transformation (with M Schreiber VPI) NEW for 2007!

DOE-ERSP: Nitrate Enhanced Cr(VI) Reduction NEW for 2007!

Subcontract: Columbia University Superfund Program - Core B Biogeochemistry

NSF Biocomplexity Program Funds Research Initiative for Bahamian Stromatolites (RIBS).

NASA funds collaborative work on arsenic cycling in Mono Lake, CA.

For more details see Research or go to RIBS website.


ARSENIC Website

 

A webpage dedicated to arsenic, with updates on the research and links to other pages related to arsenic is under construction.

For more details see Research or go to Arsenic webpage.


NEW PUBLICATIONS

Stolz, J.F., Perera, E., Kilonzo, B., Kail, B., Crable, B., Fisher, E., Ranganathan, M., Wormer, L., and Basu, P. 2007. Biotransformation of 3-nitro-4-hydroxybenzene arsonic acid and release of inorganic arsenic by Clostridium species. Environ. Sci. Tech. 41:818-823.

Hoeft, S.E., Switzer Blum, J., Stolz, J.F.,  Tabita, F.R., Witte, B., King,  G.M., Santini, J.M., and Oremland, R.S. 2007. Alkalilimnicola ehrlichii, sp. nov. a novel aresnite-oxidizing halophylic gamma proteobacterium capable of chemoautotrophic or heterotrophic growth with nitrate or oxygen as the electron acceptor. Sys. Appl.Microbiol. Int. J. Sys. Evol. Microbiol.57: 504-512
Stolz, J.F., Basu, P., Santini, J.M., and Oremland, R.S. 2006. Selenium andarsenic in microbial metabolism.  Annu. Rev. Microbiol. 60:107-130  

Oremland, R.S., Capone, D.G., Stolz, J.F, and Fuhrman, J. 2005. Whither or Wither Geomicrobiology in the era of “Community Metagenomics”. Nature Microbiol. Revs. 3:572-578

Oremland, R.S., Kulp, T.R., Switzer Blum, J. Hoeft, S.E., Baesman, S., Miller, L.G., and Stolz, J.F. 2005. A microbial arsenic cycle in a salt-saturated, extreme environment: Searles Lake, California. Science. 308:1305-1308

For more publications go to About me.