The potential of Hazara phosphates for phosphoric acid manufacture

Ishaque, Muhammed; Ahmad, Ishtiaq

doi:10.1007/bf01050670

Cited by 7 publications

(3 citation statements)

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“…In addition, RP mines in Pakistan are in lowest quantity. However, the dominant phosphate reserves are located Khyber Pakhtunkhwa and Hazara division in the North East of the country has primary 3.25 and secondary 6.71 million tons RP of siliceous and dolomite in nature having 25.8 % P2O5 consists, moreover elevated MgO (up to 6 %) [10,11]. In addition, significant phosphorite reserves have been identified in the Northwest region, Middle Transnistria, the Black Sea region and the Dnieper-Donetsk region.…”

Section: Problem Statement and Analysis Of The Recent Researches And mentioning

confidence: 99%

Enhancing Phosphorus Solubility From Rock Phosphate Integrated With Farmyard Manure in P-Deficient Soil

Lahori

Memon

et al. 2019

LPPU

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The aim of this study was to assess the solubility of phosphorus from rock phosphate incubated with farmyard manure under laboratory condition. The treatments were factorial combination of three rates each of RP (0, 2, and 4 tons ha-1) and farm yard manure (0, 10 and 20 tons ha-1). These treatments were applied to 100 g soil contained in plastic vials with three replications. Seven such sets of 27 vials each were prepared to represent seven incubation periods namely 0, 15, 30, 45, 60, 75, and 90 days. The results showed that Olsen -P improved significantly with increasing rate of rock phosphate from 0 to 4 tons ha-1 and that of farmyard manure from 0 to 20 tons ha-1. Initial available P content of soil was 4.59 mg kg-1 which enhanced up to 10.55 mg kg-1 as a result of 90 days incubation. Addition of rock phosphate and farmyard manure increased it to maximum value of 23.03 mg kg-1 with incorporation of rock phosphate at 4 tons ha-1 and farmyard manure at 20 tons ha-1. Thus, positive response of rock phosphate and farmyard manure was clearly evident on Olsen-P values due to enhancement of soil organic matter. It is concluded that there is potential for utilization of local rock phosphate by solubilising the P using farmyard manure. Soil incubation for the prolonged period of 90 days with rock phosphate and farmyard manure helped to enhance the solubility of P from rock phosphate. It is recommended that further experiments may be performed along with different bio-char, vermicompost, organic acids etc. which can help solubilise P from rock phosphate under field trials. For the first time, the feasibility of using agricultural fertilizer (manure) to increase the solubility of phosphorus from rock phosphate is experimentally substantiated. The practical value of this study is to achieve two effects simultaneously, namely, improving the fertility of agricultural lands depleted in phosphorus and utilizing agricultural fertilizer (manure).

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Section: Problem Statement and Analysis Of The Recent Researches And mentioning

confidence: 99%

Enhancing Phosphorus Solubility From Rock Phosphate Integrated With Farmyard Manure in P-Deficient Soil

Lahori

Memon

et al. 2019

LPPU

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“…The phosphorites of the Hazara District have varied compositions and appearances, although they are commonly dark-colored, granular or pelletal, compact, and hard (Ishaque and Ahmad, 1987;Hasan, 1989). The phosphorite horizons are rarely as much as 2 to 3 m thick and 140 specimens contained from 12 to 40 percent P 2 O 5 (Ali, 1974).…”

Section: Hazara Districtmentioning

confidence: 99%

Phosphate occurrence and potential in the region of Afghanistan, including parts of China, Iran, Pakistan, Tajikistan, Turkmenistan, and Uzbekistan

Orris¹

2015

Open-File Report

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As part of a larger study, the U.S. Geological Survey undertook a study to identify the potential for phosphate deposits in Afghanistan. As part of this study, a geographic information system was constructed containing a database of phosphate occurrences in Afghanistan and adjacent countries, and a database of potential host lithologies compiled from 1:1,000,000 scale maps. Within Afghanistan, a handful of known occurrences and reports indicate the presence of phosphate in Permian, Cretaceous, and Paleogene sediments and in carbonatite. With the exception of the Khanneshin carbonatite, very little is known about these occurrences. In the countries surrounding Afghanistan, economic phosphate is known to occur in Cambrian, Devonian, and Paleogene sediments and in Kiruna-type Fe-apatite deposits. Many of the host units may extend into Afghanistan or equivalent units may be present. Although the possibility of economic phosphate deposits exist for Afghanistan, the need for detailed exploration for phosphate, the remoteness of some locations, and the probability that a deposit would not be exposed at the surface mean that one or more deposits are not likely to be identified in the near future. Even if a phosphate-bearing deposit is identified in Afghanistan, it is not clear if the probable size, thickness, and grade ranges would allow economic development of the hypothesized resource.

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“…Lagarban rock is oolitic, the matrix and cement being composed mainly of cellophane with some quartz, haematite, limonite, and chalcedony. It also contains a few veins of secondary phosphate (British Mining Consultants Ltd., 1982; Ishaque and Ishtiaq, 1987;Zafar, 1993a,b). In this work, by using minerals acids, the Batkanala phosphorites have been converted into ammonium phosphate containing fertilizers, and further investigations are in progress.…”

Section: Introductionmentioning

confidence: 99%