1-Cabrera G, R, Perez ; J.M.Gomez ; A. Abalos and D.Cantero( 2006). Toxic effects of dissolved heavy metals on daesulfovibro vulgaris and desulfovibrio sp . strans . J.Haeard .Mater . 135 ( 1-3) 40 46 .
2-Armelle ,B.,J.Karine and L.Thierry ( 2007 ) . Tmpalt of substrates and cell impoilization on sidrophore activity by pseudomonas in a Fe and or Cr,Hg,Pb containing – medium J.Hazrd . Mater . 144, 1-2 ( 229- 259 ).
3 – Fabio, N.M., W.N.Chris and B.S.Robeyt ( 2005 ) . Mercury volatilization and phytoextraction from base- medal mine tailings .Environmental pollution .136: 341 – 352 .
4- Vtgikar , V.P., H.H.Tabak; j.R.Haines and R.Govind ( 2003 ) . Quantification of toxic and inhibitory impact of copper and zinc on Bioengineering, 83 , 306-312.
5 – Sengor ,S.S., Barua ;P .Gikas ; T.R. Ginn ; B . Peyton ; R. K . Sani ; and N. Spycher . ( 2009 ) . Influence of heavy metals on microbial and experimental verification, Environmental Toxicology and chemistry , 28 ( 10 ) , 2020-2029 .
6 – Gikas , P . ( 2008 ) . Sigle and combined effects of nickel ( Ni( 11) ) and cobalt (Co ( 11) ) ions on activated sludge and on other aerobic microorganisms ; A review ,J .of Hazardous materials , 159 : 187-203 .
7 –Markwiese , J. T . and P. J. S. Colbery ( 2000 ) . Bacterial reduction of cooper –contaminated ferric oxide : coper toxiexy and the interaction between fermentative and iron –reducing bacteria , Archives of Environmental contamination and toxicology , 38 : 139 – 146 .
8 – Glkas ,P ; S.S. Sengor ; T .Ginn ; j . Moberly and B. Peyton ( 2009 ) . The effects of heavy metals and temperature on microbial growth and lag . Global Nest , J .1163 ; 325- 332 .
9 – Susheel , k. M ., G . Siloni and S. Ajay . ( 2004 ) . Metal ton effect on BOD Exertion at different temperatures int . J. Environ .Res . Pubic health . 1 ( 2) : 132-137
10 – Peralt ,J.R .; J. L . Gardea – Torresdey ; K . J . Tiemann ; E . Gomez , S. Arteaga, E . Roscon , and J. G . Parsons ( 2000) . Study of the effects of heavy metals on seed germination and plant growth on alfalfa plant cmedrcago satival growth in solid media . conference of hazardous wajte Research . 135 – 140 .
11- Teresa R .P. and S. S. Sarma ( 2008 ) . Combined effects of heavy metal ( Hg ) concentration and algal ( chlorella vulgaris ) food density on the population growth of brchionus calyciflorus .J . of Enviromental Biology , 29 ( 2) : 139- 142 .
12-Baton , E.J . & Finedgold, S.M. (1990) Diagnostic Microbiology . 8th ed , Mosby –yeat – book . Inc.. Missouri .
13-Holt, J.G.; Krieg , N.R. ; Sneath , P.H. ;Staley , J.T.& Williams , S.T. (1994) Bergy,s manual of determinative Bacteriology 9th ed Williams & Wikins – co . Baltimore – London.
15-Philips (1988) Scientific books , Atomic absorption data books , 5th ed England .