Present address: S.C. Hsu, IT Corporation, 111 N. Canal St, Suite 941, Chicago IL 60606, USA Abstract Acid drainage containing high levels of iron, manganese, and sulfate is a pollution problem widely associated with abandoned coal mines. The remediation of these sites commonly falls to public agencies, so policy-makers need to allocate scarce resources over many sites and to find cost-effectiv...

Studies for determination of sulphur functional groups present in Ledo coal of Assam State of North Eastern Region of India were carried out using Temperature Programmed Reduction (TPR) method. TPR studies were carried out in presence of Resorcinol and hydrogen gas to arrive at the final result. TPR studies on model sulphur compounds viz. L-Cysteine, synthetic rubber, Thiokol, having hydroxyl t...

This work represents the first attempt to examine pyrite oxidation in a complex system involving iron/sulfide-oxidizing bacteria, molecular oxygen and intermittent fluxes of hydrogen peroxide at micromolar levels. As also pointed out by Reviewer #4, investigation of such a complex system is quite difficult to perform, we did not intend to set an unrealistic high bar for this study. As stated in...

In this paper, the effect of ultrasonic pre-treatment and aeration on the flotation separation of chalcopyrite from pyrite was investigated at different amounts of potassium ethyl xanthate (KEX), as a collector, and pH values. Artificially-mixed samples of chalcopyrite and pyrite were subjected to flotation studies to understand the effect of aeration with or without ultrasonic tre...

As a result of microscopic researches it has been determined that mineralogical composition the ore field consists hypogenic,vein and hypergen minerals. A number factors in formation texture types structure, including morphological properties minerals, characters solutions, affect tectonic processes after are not excluded. Due to influence above mentioned stratum, massive, nested textures repla...

Introduction Conclusions References