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Dump consisting of 9500 tons of rich-in-pyrite mining wastes located in the uranium deposit Curilo, Western Bulgaria, was, after rainfall, an intensive source of acid drainage waters. These waters had a pH in the range of about 1.7-4.5 and contained radionuclides (uranium, radium), heavy metals (copper, zinc, cadmium, lead, nickel, cobalt, iron, and manganese), arsenic and sulphates in concentrations...
Pseudomonas fluorescens BM07 was characterized as a producer of cold-induced biopolymer by decreasing the temperature down to as low as 10°C. It was previously shown that the synthesis of BM07 biopolymer was inhibited at 30°C. The present study was conducted to investigate the biosorption of mercury (Hg²⁺) ions on the BM07 cells grown on Ml minimal medium at two temperatures (10°C and 30°C). The effects...
The effects of essential (Zn⁺²) and non-essential (Cd⁺² and Pb⁺²) heavy metals on morphogenesis of two represantatives of informal group zoosporic fungi namely; Saprolegnia delica Coker and Dictyuchus carpophorus Zopf. were studied. These two species varied in their tolerance of each amended heavy metal. Lead had the most potent effect amongst the tested heavy metals in inhibiting the radial extension...
Our aim was to investigate the biosorption of Pb²⁺, Hg²⁺, Cd²⁺ from aqueous solution by Aspergillus terreus (both free and immobilized on loofa sponge discs). Our results show that the adsorption capacity of fungal biomass on loofa sponge (FBLS) is superior to free fungal biomass (FFB). The adsorption selectivity by FBLS was in the order Pb²⁺>Hg²⁺>Cd²⁺. The maximum metal ions adsorbed was 247...
The !occulating activity of a bioflocculant produced by Pseudomonas aeruginosa ATCC-10145 using kaolin clay was assayed. The in!uence of carbon, nitrogen sources, pH and culture temperature on bioflocculant production was investigated. The effects of cationic compounds, bioflocculant dosage, pH and temperature on flocculating activity were also determined. Of the cations tested, Ca2+, K +, Na+, Zn2+,...
Nickel resistant bacteria (ZB, ZC, ZD, ZL, ZK and SIX) were isolated from industrial effluents and corroded iron pieces from indigenous environment of Punjab, Pakistan. These six strains could tolerate nickel at different levels with ZB, ZC, ZD, ZL, ZK, and SIX having 233, 225, 267,233,228 and 296 mM minimum inhibitory concentration (MIC) of nickel ions, respectively. These bacteria were sensitive...
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