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胶磷矿（Phosphate rock）是以磷酸盐成分为主的含有少量Si、Al、Fe等元素的集合体。 胶磷矿严格的讲不是矿物，没有一定的晶体结构，更谈不上有固定的分子式。 磷块岩的主要含磷矿物为碳氟磷灰石。 其中磷酸盐高度分散，几乎不形成
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英文名为PHOSPHATE ROCK 。 分子式：3Ca3 (PO4)2CaR2。 [1] 磷的物理性质: 游离态磷有 白磷 、 红磷 和 黑磷 三种同素异型体. 分子是由四个磷原子构成的正四面体.键角60°. 白色蜡状,
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4 天之前 The term phosphate rock (or phosphorite) is used to denote any rock with high phosphorus content. The largest and least expensive source of phosphorus is obtained by
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2010年2月9日 Phosphate rock (phosphorite) is a marine sedimentary rock, which contains 18–40% P2O5 , as well as some uranium and all its decay products, often 70 to 200 ppmU,
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2016年4月13日 When rock contains phosphate components between 5 and 50% (by volume), then it is phosphatic, and the name of the main lithology is used as a suffix (phosphatic limestone, phosphatic claystone, etc.). In addition, the
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Phosphate rock is a mineral resource containing phosphorus that is widely used in various industries such as agriculture, chemistry, and national defense. It is a key source of
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Phosphorite, rock with a high concentration of phosphates in nodular or compact masses. The phosphates may be derived from a variety of sources, including marine invertebrates that
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2023年1月12日 Phosphate rock is a general term used to describe natural mineral assemblages of variable composition that have a high concentration of phosphate minerals. Most of the minerals in phosphate rock belong to the
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2023年12月29日 Phosphate rock 磷矿是一种含有高浓度磷酸盐的矿石。 它的主要成分是磷酸钙和其他磷酸盐，通常包括氟磷灰石、碳酸盐和硅酸盐等。
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Phosphate rock (PR) is a finite mineral indispensable for fertilizer production, while P (phosphorus) is a major pollutant if applied or discharged in excess, causing widespread eutrophication (Carpenter and Bennet, 2011). High-grade PR is obtained from deposits which took millions of years to form and which are gradually being depleted.
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2009年5月1日 However modern agriculture is dependent on phosphorus derived from phosphate rock, which is a non-renewable resource and current global reserves may be depleted in 50–100 years. ... However this approach fails to address several key issues, including the finiteness of phosphate rock reserves in the long term; poor farmers’ limited access to ...
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2014年11月19日 The long-term effectiveness of reactive phosphate rock as a phosphate fertiliser for New Zealand pastures A.G. Sinclair’, C.B. The national series was completed in May 1989 andDyson* ... phosphate rock from Peru, and triple superphosphate (TSP). That comparison is the subject of this paper. SPR contained 12.8% total P and 5.7% citric acid-
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2013年1月1日 Depending on the ore grade and processing technology, P recovery from rock phosphate ranges from 65-90% (Ruan et al., 2019). This is a substantial improvement from pre-1990s recovery rates of 40.5 ...
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2016年6月24日 The level of potentially toxic metals in the phosphate rock depends on the type and the origin of the phosphate rock whereas; sedimentary phosphate deposits possess much higher concentrations of ...
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Phosphate rock. Phosphate rock is the primary raw material for all phosphate fertilizers, but its pricing is dependent not only on the downstream fertilizer fundamentals set out above but also the rock’s P2O5 content and quality profile.Ultra-low grade phosphate rock at 18-27% P2O5 is often used as a direct application fertilizer, 27-31% P2O5 rock is regularly used for SSP production
خبير الاتصالThe effect of two P-forms and the P fertilization system were studied in field trials set up on two moderately acidic Hungarian soils. Reactive Algerian rock phosphate and Kola superphosphate doses were based on the phosphorus equivalence. The experimental design makes it possible to compare the effect of annual 35 kg/ha P doses with initial one-time application of the 175
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2024年7月1日 The Cabinda phosphate project, comprising the Cácata phosphate deposit and the Futila fertiliser plant, will operate for 20 years, producing 236 000 t/y of fertiliser over 20 years, based on a ...
خبير الاتصالThe agronomic effectiveness (yield and P uptake) of twelve granular, partially acidulated phosphate rock fertilizers (PAPR) and two finely ground, unacidulated phosphate rocks (PR) were compared to that of a single superphosphate in a long-term greenhouse experiment with lucerne (Medicago sativa L., cv. CUF101), grown in a low P sorbing, moderately acid, sandy loam soil
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2024年7月11日 Chatham Rock Phosphate sign term sheet to acquire Korella phosphate mine in Australia Safer Phosphates is a global campaign that aims to highlight the negative impact of the use of heavy metal in mineral fertilisers About Us Our Aim. Our Initiatives . News Insights Videos Publications .
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2002年5月1日 The differences between the rock phosphates could also be expressed in terms of relative agronomic efficiency (RAE %), when the effect of the rock phosphate was compared to that of water‐soluble ...
خبير الاتصال2023年11月11日 Long-term comparison of rock phosphate with superphosphate on crop yield in two cereal-legume rotations Can. J. Plant Sci 74: 303–311. Cordell D, Rosemarin A, Schröder JJ, Smit AL (2011) Towards global
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2024年7月1日 Phosphate rock and phosphorite are names used for sedimentary rocks that contain at least 15% to 20% phosphate on the basis of weight. The phosphorous content in these rocks is mainly derived from the presence of
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2017年1月1日 Phosphate rock is a general term for a rock that contains a high percentage of the apatite . group of minerals, but in marine sedimentary phosphorites it is usually a carbonate-
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2023年9月14日 Reactive phosphate rock (RPR) is recognised in Overseer® as being less susceptible to loss of dissolved reactive phosphorus (DRP) in run-off from than is soluble P fertiliser, although far ... Levels of weakly-adsorbed P achieved with long-term RPR are usually 20-30 ug/gm soil, a good match with concentrations of weakly-adsorbed P and soil ...
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2024年10月28日 The conventional intensive use of chemical fertilizers poses significant threats to agro-ecosystem sustainability, leading to soil deterioration and environmental pollution. This study explores the potential of utilizing phosphate-rock mining wastewater (MWw) as a sustainable alternative for fertigation in chickpea cultivation. The MWw used in the study
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2017年7月11日 However, its high cost of production makes the long-term use of crude rock phosphate (RP) a more attractive alternative in developing countries, albeit its influence on plant-associated microbiota remains unclear. Here, we compared long-term effects of TSP and RP fertilization on the structure of maize rhizosphere microbial community using next ...
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2017年7月11日 However, its high cost of production makes the long-term use of crude rock phosphate (RP) a more attractive alternative in developing countries, albeit its influence on plant-associated microbiota ...
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2023年1月13日 The accuracy and precision of the used methods were evaluated by analysis of standard reference materials (SRM) for Western Phosphate Rock (NIST 694). The recovery was 85.3% for U and 109% for K2O ...
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2016年3月12日 The use of reactive rock phosphate (RP) in acidic soils as a phosphate (P) source for pastures and crops presents attractive economic advantages with respect to soluble phosphate. However, some studies have demonstrated that the short-term (1-year) efficiency of RP, compared with that of water-soluble P, is relatively poor. This fact penalizes not only the
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