The phosphate industry. II.-Superphosphate

The Manufacture of Sulfuric Acid and Superphosphate

Degree of Phosphorus Saturation and Soil Phosphorus Thresholds in an Ultisol Amended with Triple Superphosphate and Phosphate Rocks

Soil phosphorus (P) release capability could be assessed through the degree of P saturation (DPS). Our main objective was to determine DPS and, hence, P threshold DPS values of an Ultisol treated with triple superphosphate (TSP), Gafsa phosphate rocks (GPR), or Christmas Island phosphate rocks (CIPR), plus or minus manure. P release was determined by the iron oxide-impregnated paper strip (stri...

Phosphate: the Silent Challenge

Phosphorus (P) is one of the most vital elements for all living organisms which acts as aconstituent of essential biomolecules such as nucleic acids, phospholipids, and phosphosugars,and as a major contributor to almost all metabolic reactions including photosynthesis,respiration, and energy delivery. It is one of the most needed nutrients for plant growth anddevelopment. Despite high levels of...

Dilead(II) trimanganese(II) bis(hydrogenphosphate) bis(phosphate)

The title compound, Pb(2)Mn(3)(HPO(4))(2)(PO(4))(2), was synthesized by a hydro-thermal method. All atoms are in general positions except for one Mn atom which is located on an inversion center. The framework of the structure is built up from PO(4) tetra-hedra and two types of MnO(6) octa-hedra, one almost ideal and the other very distorted with one very long Mn-O bond [2.610 (4) Å compared an ...

A Prospective Radiological Risk Assessment for a Phosphate Industry Project

The Santa Quitéria Project is the major Brazilian uranium mine project, nowadays. A peculiarity of this project is the association of uranium with phosphate and the mining and processing of both by two different enterprises. A private company will be responsible for the production of phosphoric acid and a state owned company will be responsible for the production of yellow cake. At full capacit...