Three chemical immobilization materials, agricultural limestone (AL), mineral rock phosphate (RP), and diammonium phosphate (DAP), were evaluated using solute transport experiments to determine their ability to reduce subsurface heavy metal transport in a smelter contaminated soil. Percent reductions in metals transported were based on comparison with cumulative totals of metal species eluted t...

The dissolution kinetics of the Abu-Tartur phosphate rock using dilute hydrochloric acid has been investigated. The influence of acid concentration, liquid/solid ratio, particle size and temperature was studied to explore the dissolution kinetics of phosphate rock. It was found that the leaching rate increases with increasing the acid concentration, liquid/solid ratio, temperature and decreases...

A flow injection method with on-line solid sample dissolution was developed for the determination of fluoride in phosphate rock. The fluoride was selectively leached (98-102.4 % recovery) from a 50-mg powdered phosphate rock sample with 0.50 M citric acid. Using the zone sampling technique the fluoride in the buffered leachate was determined by injecting 87 muL into the carrier stream using a f...

This paper reviews the latest information and perspectives on global phosphorus scarcity. Phosphorus is essential for food production and modern agriculture currently sources phosphorus fertilizers from finite phosphate rock. The 2008 food and phosphate fertilizer price spikes triggered increased concerns regarding the depletion timeline of phosphate rock reserves. While estimates range from 30...

Pengguanan pupuk hayati mikoriza dan batuan fosfat (rock phosphate) dalam memacu pertumbuhan tanaman jagung telah banyak dikembangkan. Penelitian ini bertujuan untuk meningkatkan hasil dengan mengkombinasikan antara penggunaan rock phosphate. dilakukan selama 3 bulan di Dusun Sengir, Sumberharjo, Prambanan. metode eksperimen lapangan menggunakan rancangan acak kelompok (RAK) faktorial yang terd...

Eight strains isolated from the stems of Lippia sidoides were identified as belonging to Lactococcus lactis, a bacterial species considered as "generally recognized as safe". Their capacity to solubilize/mineralize phosphate was tested in vitro with different inorganic and organic phosphorus (P) sources. All strains were able to solubilize calcium phosphate as an inorganic P source, and the bes...