AbstractAbstractSubjects working in or living near informal gold mining and processing southern Peru were studied to determine mercury exposures from two tasks: amalgamation amalgam smelting. The authors collected 17 airborne 41 urinary levels. mean levels 728 (range: 321–1,662) 113 (45–197) μg/L for smelters smelters, respectively. A third group had a 18 (range 8–37). People the town but with no activities 8 (5–10), while control outside 4 (2–6). Mean exposure was 2,423 μg/m3 530–4,430)...

The gol aim of this study is to optimize the ability produce hydrogen sulphide (H 2 S) in pure and mixed cultures sulfate reducing bacteria (SRB) at pH variations from 9 5. Hydrogen produced by SRB reacts with dissolved metals water or tailings generating highly insoluble metal sulfides therefore selective immobilization different metals. Three strains were isolated Orcopampa mine Pantanos de Villa wetlands, both located Peru. Cultures identified microscopy, cultural characteristics...

The objective of this project was to find optimum parameters for the development bioremediation process cyanidation tailings by addition nutrients and microorganisms. It tested use sulfate-reducing bacteria (SRB) stabilize metal ions through formation sulphides and; able biodegrade cyanide (BC). Factorial experiments were conducted at level columns. SRB from Cyanidation isolated BC proceeded pregnant solution cyanidation. BSR adapted tailings. A column test performed try: 1. effect using 1...

The aim of this research was the selection bacterial strains resistant to mercury, as well demonstrate their capacity reduce mercury in solution when they are inoculated pure and mixed cultures. Samples soil from informal mining gold sites Peru were collected fifteen bacteria isolated. Strains RM6, RM7, RM9, RM11, RM12 RM13 selected for solution. six belong genus Pseudomonas. Inoculated cultures, these although different percentages: RM11 an 93% 97% while RM7 y 80% 85%. consortium all showed...

A total of twenty-four isolates actinobacteria from arsenopyrite, pyrite, polymetallic sulfides and magnetite Peruvian mining zones have been used with the purpose characterizing them by morphological, physiological molecular studies for future biotechnological applications. 23 strains were identified as Streptomyces and1 Actinomadura sp.95% 70% able to grow at pH 3.5 2, respectively. Only 19% oxidize iron 2. Also, they tested growth on arsenopyrite tailings sp. E1 Streptomycesvariabilis AB5...

Three isolates of Streptomyces variabilis (AB5, F and K1A) one isolate sp. (C2) were isolated acidic cultures from mineral ores concentrates mines the Peruvian highlands. The identified molecular phenotypically characterized by growth at different conditions as pH tolerance, temperature, sodium chloride heavy metals resistance. sp . was able to grow until 200 ppm mercury S. (AB5) grows in presence 100 mercury. AB5 K1A only 50 mercury.All strains tested their ability induce germination...

Mining industry is a source of wealth but also environmental pollution in Peru. In this study 12 colonies actinomycetes were isolated acidic cultures from mineral ores and concentrates mines the Peruvian highlands. The isolates characterized phenotypically by microscopy growth at different conditions as pH tolerance, temperature, sodium chloride, heavy metals resistance; ferrous iron thiosulfate oxidation. All identified based on their cultural spore characteristics. Most able to grow 8 -...

El objetivo de este estudio fue determinar la actividad antimicrobiana un cultivo Streptomyces sp. 6E3 aislado minerales frente a diferentes cepas patógenas, producir extracto y estimar concentración mínima inhibitoria (CMI) las fracciones contra Staphylococcus aureus resistente meticilina (SARM). La cepa mostró principalmente (S. aureus). Cinco seis presentaron más efectiva dio una CMI 0,88 ug/mL S. ATCC 33862, 0,44 43300 1,76 SARM. tiene potencial antimicrobiano resistentes no resistentes,...