Phosphorous nodules are found on theocean floor along with manganese nodules.Most commercial phosphorus is produced in electric furnaces where the phosphate-richminerals are heated to drive off the phosphorus as a gas, which is then condensed under water.Another process uses sulfuric acid to remove ...
The catalyst is obtained by contacting a partially cation exchanged calcined zeolite-containing catalyst with an anion such as a dihydrogen phosphate anion or a dihydrogen phosphite anion and additionally with an ammonium salt other than a salt of an inorganic acid of phosphorus. A hydrocarbon ...
Extracellular phosphatase activity (PA) has been used as an overall indicator of P depletion in lake phytoplankton. However, detailed insights into the mechanisms of PA regulation are still limited, especially in the case of acid phosphatases. The novel substrate ELF97 phosphate allows for tagging ...
The catalyst is obtained by contacting a partially cation exchanged calcined zeolite- containing catalyst with an anion such as a dihydrogen phosphate anion or a dihydrogen phosphite anion and additionally with an ammonium salt other than a salt of an inorganic acid of phosphorus. A hydrocarbon ...
Large amounts of phosphorus (P), a nonrenewable resource, are derived from phosphate rock reserves to meet the growing demand for food. Global reserves of phosphate rock will be depleted within several hundred years with the increase in the use of P, especially P fertilizers (Fixen and ...
Quantifying phosphorus sources, sinks, flows and footprints: Incorporating phosphate rock, mineral impurities and natural inputs This research is the first to include phosphorus as impurities in quantifying total phosphorus flows at the U.S. and global scale (Ch. 2). At the global sc... JN Kni...
Phosphate-rich peraluminous pegmatites generally have the most phosphorus-enriched feldspars (Hagendorf, Peerless, Black Mountain, White Picacho district). Except for the uniformly low phosphorus contents of feldspars from gadolinite-type pegmatites, few other systematic differences are evident among the ...
BP can readily get degraded into non-toxic phosphate and phosphonate anions under ambient conditions which greatly hamper its optical and electrical applications. This property also contributes to the high biocompatible and biodegradable nature of this particle which makes it a perfect candidate for ...
the decomposition of silicate, phosphate, carbonate, oxide, and sulfide minerals and the dissolution of some important elements (Si, Al, Fe, Mg, Mn, P, Na, Ti, etc.) from minerals35,36,37,38, which improves the fertility level of regolith and enables the growth of plants. However, the...
Local rock phosphate (PR) is potentially a viable alternative to the imported P fertilizers. Field and greenhouse experiments were conducted to compare the use of triple superphosphate (TSP) and several products developed from the local phosphate as fertilizers for rice production. The experiments ...