Sulphate-reducing bacteria isolated from submerged soil samples of paddy fields effectively precipitated copper from aqueous solution with maximum effect (75%) at 25 ppm Cu2+. As the copper concentration was increased to ...

X-ray diffraction has been used to study the changes in mineralogy that occur during ammonia leaching of sulfide minerals and complex bulk sulfide concentrates. Leaching results in high extraction rates (>90 pct) of copper ...

Studies on the effect of gamma-ray irradiation on critical transition temperature, transport and magnetic critical current density (at 4.2 K), high-field magnetization (at 4.2 K), and microwave-induced d.c. voltage (inverse ...

Heat-treated rice hulls have been used as precursor material for synthesis of ultrafine SiC in a RF plasma reactor. Rice hulls containing finely distributed silica and active carbon act as a source for SiC formation. The ...

In India around 7 million tonnes of iron slimes resulting from mechanised iron ore washing plants were being rejected annually. Since the slims contain 53 to 63% Fe, retrieving such valuable fines is the immediate need ...