Synergism of Pseudomonas aeruginosa and Fe0 for treatment of heavy metal contaminated effluents using small scale laboratory reactor

Evaluation of the Mn(II) adsorption potential of SiO2 obtained by different wet chemical methods

“…Among the recurring environmental problems, one of the most important is the generation of contaminated effluents with a high concentration of heavy metals . These effluents can be of great risk to human and aquatic life when discharged in the environment without previous treatment …”

“…The presence of manganese in high concentrations in aquatic environments, usually from industrial processes such as mining and ore processing, causes inorganic pollution due to the fact that the metal is not biodegradable, presents toxicity and can accumulate in humans and animals, causing adverse reactions . Therefore, the removal of such metals from polluted water has attracted considerable attention . Adsorption studies of metals have been increasingly emphasized in the decontamination of effluents containing toxic metals, using various materials as adsorbents, such as activated carbon, sawdust of various origins, natural zeolite, and oxides of different types, with emphasis on SiO 2 .…”

Bioleaching of trace metals from coal ash using local isolate from coal ash ponds

“…The liquid was transferred in a 100 ml fresh nutrient broth media. The Pseudomonas spp was incubated at 37°C at 90 rpm for 7 days [18][19][20].…”

“…Then the inoculum was placed in a water bath shaker (Visio VS-1205SW1) at 90 rpm and 37°C. Pseudomonas spp were incubated for 5 days prior to bioleaching [18][19][20].…”

“…However, taking into consideration the pH of the ash which is 11, the decrease in the pH value is an indirect indication of possible formation of organic acid such as oxalic, gluconic or citric acid by the Pseudomonas spp. [18][19][35][36] Based on literature, bioleaching using Acidithiobacillus spp. extracted more metal as compared to Pseudomonas spp.…”