Results 101 to 110 of about 160,326 (161)

Phosphate rock bioleaching

Biotechnology Letters, 1992
Microbiological acid solutions produced byThiobacillus ferrooxidans andThiobacillus thiooxidans on pyritiferous concentrate were used to solubilize phosphate rock with a high grade in P2O5. Five different mixtures of pyritiferous concentrate and phosphate rock, in different proportions, were used in adequate liquid culture media.
A. C. A. Costa, R. A. Medronho, R. P. Pecanha   +2 more
openaire   +1 more source

Uranium endowments in phosphate rock

Science of The Total Environment, 2014
This study seeks to identify and specify the components that make up the prospects of U recovery from phosphate rock. A systems approach is taken. The assessment includes i) reviewing past recovery experience and lessons learned; ii) identifying factors that determine recovery; and iii) establishing a contemporary evaluation of U endowments in ...
Andrea E, Ulrich, Ewald, Schnug, Horst-Michael, Prasser, Emmanuel, Frossard   +3 more
openaire   +2 more sources

Effective lead immobilization by phosphate rock solubilization mediated by phosphate rock amendment and phosphate solubilizing bacteria

Chemosphere, 2019
Lead can be immobilized in contaminated soils by phosphate rock (PR) amendment, but its efficiency is generally limited by low solubility of PR. Our study aimed to elucidate whether phosphate solubilizing bacteria (PSB) can promote Pb immobilization through PR solubilization. Results showed that P. ananatis HCR2 and B.
Jia-cheng Xu, Li-min Huang, Chengyu Chen, Jing Wang, Xin-xian Long   +4 more
openaire   +2 more sources

Rock phosphate enriched compost: An approach to improve low-grade Indian rock phosphate

Bioresource Technology, 2006
In this study, rock phosphate enriched composts (RP-compost) were prepared by mixing four low-grade Indian rock phosphates with rice straw with and without Aspergillus awamori. RP-compost had higher total P, citrate soluble P (CSP), organic P (Org.P), acid and alkaline phosphatase activities, and lower water soluble P (WSP) and microbial biomass C (MBC)
D R, Biswas, G, Narayanasamy
openaire   +2 more sources

Phosphate rock and phosphate rock/sulphur granules as phosphate fertilizers and their dissolution in soil

Fertilizer Research, 1987
A field trial was conducted for 3 years to evaluate phosphate rocks and phosphate rock/sulphur granules as fertilizers for permanent pastures. Two reactive phosphate rocks, North Carolina (USA) and Chatham Rise (New Zealand), and an unreactive Florida (USA) were used.
openaire   +1 more source

Phosphate supplying power of rock phosphates in an oxisol

Plant and Soil, 1980
The P-supplying power of triple superphosphate, three apatitic rock phospates and a calcined aluminum rock phosphate were tested by measuring the quantities of fertilizer P recovered in soybean and in four chemical extractants, after 3-day and 75-day periods of contact between soil and fertilizer.
van Raij, B., van Diest, A.
openaire   +2 more sources

Phosphate rocks and partially-acidulated phosphate rocks as controlled release P fertilizers

Fertilizer Research, 1993
Properties of phosphate rocks (PRs) and partially acidulated phosphate rocks (PAPRs) which affect the pattern of P dissolution and thus the potential for manipulating the rate of P release are reviewed. The effects of soil and plant properties are also considered.
J. Hagin, R. Harrison
openaire   +1 more source

Mussoorrie rock phosphate-pyrite mixture as phosphate fertilizer

Fertilizer Research, 1996
Mussoorrie rock phosphate (MRP), MRP + pyrite (25% by weight), diammonium phosphate (DAP), ammonium polyphosphate (APP) and nitrophosphate (NP) were compared in a field experiment as fertilizers for wheat. At 20 kg P ha−1, MRP was only 6 per cent as effective as DAP. However, when it was mixed with pyrite, the efficiency of MRP increased to 64 per cent
S. N. Sharma, R. Prasad
openaire   +1 more source