EFFECT OF HG, CU, NI MINERALS' ON BIOFILMEFFECT OF HG, CU, NI MINERALS' ON BIOFILM | ||
| Iraqi Journal of Biotechnology | ||
| Article 1, Volume 10, Issue 2, December 2011, Pages 216-203 | ||
| Abstract | ||
| The present study is conducted to in restigate the bacteria Pseudomonas to the heavy metals. The isolates themselves are submitted to a test to examine their resistance to three types of minerals (cooper, mercury and nickel ) and their impact on the growth of the isolates and the formation of biofilms. Besides, the ability of these isolates in the treatment of heavy metals and removing them from the environment. The results of using the heavy materials indicate that mercury is most effective when it is inhabited for the purpose of the growth of local isolates at a concentration 12.5 mg.l-1compared to nickel and copper which inhibit the growth of all isolates at concentration 300 mg.l-1. While it is found that nickel has a vitas effect on the formation of biofilms of all the isolates where one can find that the formation of membrance is stopped to all isolates at concentration 200 mg.l-1. Actually, the biofilms is formed at a concentration between (0.25–10)mg.l-1under the effect of mercury and then it is stopped. At all at concentration 250 mg/l. In relation to the copper one can find that the formation of biofilms is continued until it reaches to the concentration 250 mg.l-1 and its formation is stopped at all at concentration 300 mg.l-1 The effeciency of the five local isolates is varied in removing the heavy minerals(nickel, copper, mercury) from the cultural media .The results show the ability of these isolates in removing these minerals with a high efficiency of concentration (5–250) mg.l-1after that the efficiency of these isolates is decreased in removing these minerals with the increase of concentration of the mineral in cultural media | ||
| Keywords | ||
| Biofilms; minerals; Pseudomonas aeruginosa | ||
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