Now showing items 31-40 of 541
Effect of lime and gypsum application on chemical characteristics of leaching from acid soil.
(Annual Report of the Bean Improvement Cooperative, Fort Collins, v. 38, p. 56-57, Mar. 1995., 1995)
MICROBIAL SUCCESSION DURING A HEAP BIOLEACHING CYCLE OF LOW GRADE COPPER SULPHIDES. DOES THIS KNOWLEDGE MEAN A REAL INPUT FOR INDUSTRIAL PROCESS DESIGN AND CONTROL?
(TRANS TECH PUBLICATIONS LTD, 2009)
The paper "Bacterial succession in bioheap leaching"  initiated the search for methods to analyze the microbial dynamics in bioleaching industrial processes as a key to advancing commercial bioheap applications. "Chemical ...
Evaluation of nitrate leaching from mine tailings amended with biosolids under Mediterranean type climate conditions
Mine tailings arc difficult to revegetate due to the lack of organic matter, severe nutrient limitations, and potential metal toxicity. Biosolids has been shown to be favorable for improving properties of mine tailings. ...
Leaching of nitrate and ammonium from cover crop straws as affected by rainfall
(Taylor & Francis Inc, 2014)
Cr/Al oxide as solid acid catalyst to afford Babassu biodisel
In this work, it was described the preparation and the characterization of a solid acid catalyst obtained by the mixture of Cr/Al oxides (CRAL). The catalyst was tested in the transesterification reaction of babassu oil ...
Bacterial and chemical leaching of chalcopyrite concentrates as affected by the redox potential and ferric/ferrous iron ratio at 22 degrees C
(Elsevier B.V., 2014-11-10)
Biological oxidation of chalcopyrite by acidophilic and mesophilic bacteria becomes hindered over time due to passivation of the surface, making the mineral relatively recalcitrant to beneficiation in bioleaching processes. ...
Coffee processing residues as a soil potassium amendment
Introduction Total coffee production in the world in 2013 was 8.7 million Mg of coffee beans. Coffee must be processed after harvest to separate beans from the husk, and the post-harvest process can generate different types ...
Transesterification of soybean oil catalyzed by alkylguanidines heterogenized on different substituted polystyrenes
(Elsevier Science BvAmsterdamHolanda, 1996)
Alterações químicas em um latossolo tratado com extrato pirolenhoso
The use of pyroligneous acid (PA), a by-product of charcoal production, is an ancient practice applied in agriculture to control soil and plant pests and diseases. However, little is known about the chemical alterations ...