SPRING WATER-A POSSIBLE SOURCE OF DRINKING WATER …
spring water-a possible source of drinking water at the time of midsummer in coastal belt of karnataka -a case study of ramathirtha-gokarna, india June 2020 International Journal of Advanced ...
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Industrial wastes: Fly ash, steel slag and phosphogypsum
The annual phosphogypsum (PG) production in India has been 6.5 million tons and about 4.5–5.0 tons (dry basis) of PG is generated per ton of phosphoric acid production. Fly ash ... Phosphogypsum (PG) is a rich source of sulfur and contains about 90% of sulfur in the form of calcium sulfate (CaSO 4.2H 2 O) (Fig. 4).
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Recycling phosphogypsum in road construction materials …
The physical properties of the material influence its application. Phosphogypsum mainly consists of silt-sized gypsum crystals. These gypsum crystals are softly aggregated, and their morphology depends on the sources of the phosphate rock and the reaction conditions of the acid attack (IAEA Technical Reports Series No. 475, 2013).
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Geotechnical and Leaching Characteristics of the Indian Raw Phosphogypsum
Phosphogypsum (PG) is an industrial waste of the phosphoric acid industry and is mainly composed of calcium sulphate. PG has sufficient mechanical strength to be used for secondary road embankments and base material. ... National Institute of Technology Karnataka Surathkal, Mangalore, India. Babloo Chaudhary . Shimizu Corporation, Tokyo, Japan ...
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The Effects of the Combined Application of Biochar and …
Chinese cabbage (Brassica pekinensis (Lour.) Rupr.) is rich in many vitamins and many minerals and is an important green vegetable in people's daily diet. Soil heavy metal Cd …
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Production of Beneficiated Phosphogypsum for Cement …
The beneficiation of phosphogypsum procured from two sources was conducted in the pilot plant of 2 tlshift capacity installed at Central Building Research Institute (CBRI) to reduce impurities of phosphates, fluorides, organic matter, alkalies, ... India annually. With installation of more phosphatic fertilizer plants the quantity of the byproduct
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SOURCES OF GYPSUM IN SOUTH AFRICA
The main sources of gypsum are from the production of phosphoric acid from rock phosphate; gypsum produced from this process is a finely grained high purity material and is commonly referred to as phosphogypsum (PG). The main sources of PG in South Africa are located in Modderfontein, Phokeng, Potchefstroom and Phalaborwa which are reported to ...
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RESEARCH ARTICLE Legume Research- An International …
Phosphogypsum was used as source of S equivalent along with RDF. In T 2 to T 5 entire dose of phosphogypsym was applied as basal whereas and in T 6 to T 9
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Energy Utilisation in Karnataka: Part-I An Overview
energy/unit output for Karnataka and India. From this, we can see that; i) Industry and transport are major consumers, followed by domestic users; ii) Industries are energy intensive as can be seen from the fact of 1.96 tons of coal replacement is needed for Rs. 1000/- of output in Karnataka, where as the figure is 1.63 for India;
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Efficient Recovery of Trapped Phosphorus from Waste …
In the phosphogypsum pond, the solid particles of phosphogypsum are allowed to settle down for few days and the water from the slurry is decanted and used as process water.
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Sources of Karnataka History
Dr. S. Srikanta Sastri's 1940 book where he lists epigraphical records and inscriptions tracing the history of Karnataka state over last two millenia.
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Properties, Purification, and Applications of Phosphogypsum: …
Phosphogypsum (PG) is a by-product produced during the wet process of phosphoric acid (H3PO4) production from natural phosphate rocks. Approximately 4–6 tons of …
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Removal of fluoride ions from wastewater via simple low …
Groundwater poses the most severe challenge since it represents the source of more than half of the global population's drinking water. It is estimated that about 200 million people in 25 countries, including Pakistan, China, Thailand, India, Sri Lanka, Mexico, West Africa, and Iran, ... Phosphogypsum (PG) is an industrial waste residue ...
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Utilization of Neutralized Red Mud (Industrial Waste) in …
India's annual cement consumption is about 53 million ... Phosphogypsum is the waste generated by the phosphoric acid, ammonium phosphate and hydrofluoric acid ... Karnataka, in their paper on "The use of locally available materials for low cost housing" has studied the use of red mud as mortar and as a
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Phosphogypsum
Phosphogypsum, a waste by-product from wet-acid production of phosphoric acid, contains variable levels of metal impurities (Cd, Zn, barium (Ba)) and radionuclides (mainly uranium …
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status-challenges-and-solutions-of-oilseed-production-in-india
Production of oils from different sources in India (2016-17) ... application of phosphogypsum @ 125 kg S eq ha-1 in split recorded highest yield attributes, pod yield (2063 kg ha-1), kernel yield ...
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Influence of yellow gypsum on nutrient uptake and yield of …
Yellow gypsum (YG), a synthetic product from Linz-Donawitz slag containing high iron (Fe) (5.41%), zinc (Zn) (0.37%) and silicon (Si) (3.41%) can be used as a source of these …
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The treatment of phosphogypsum leachate is more urgent …
Phosphogypsum(PG) is one of the typical bulk industrial solid wastes generated in the phosphate chemical industry. Due to its huge production volume and immature resource treatment technology, a large amount of PG can only be stored and disposed in slag yards, and its impact on the ecological environment is becoming increasingly significant during long-term …
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Calcium Sulfoaluminate Cement Manufacturing in India…
Calcium sulfoaluminate (CSA) cement is a low-CO 2 binder exhib-iting useful properties, such as shrinkage compensation and rapidhardening, which can be achieved by altering its phase composi -tion.
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Feasibility of incorporating phosphogypsum in ettringite-based binder
1. Introduction. Phosphogypsum (PG) is a residue of phosphate production with a very low recycling rate (less than 5%) (International Atomic Energy Agency (IAEA), 2013).Approximately 4–6 tonnes of PG are generated for each tonne of phosphoric acid produced (Rashad, 2017).Worldwide, this results in around 170 million tonnes per year of PG being …
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Development and optimization of phosphogypsum-based …
The results showed that in addition to inorganic impurities, phosphogypsum also has a certain amount of organic impurities. The main sources of organic matter present in PG were plant fibres entrapped in the phosphate rock and residues of admixtures such as deers, scale inhibitors, and crystal form improvers added during the production process.
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Efficacy of phosphogypsum and magnesium sulphate as sources …
236, West Bengnl, India . Recived : 05.03.2011 ... of Northern Transition Tract of Karnataka. ... various sulfur sources like gypsum (14-16% S), phosphogypsum (14-16% S), ammonium sulfate (24% S ...
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Biotransformation of phosphogypsum in media containing …
Studies on the biotransformation of phosphogypsum (a waste product formed in the course of the production of phosphorous fertilizers) with the use of sulfate reducing bacteria (SRB) demonstrated that it is a good source of sulfates and biogenic elements for these bacteria, though the addition of org …
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Hazardous waste management in India
Phosphogypsum 4.5 11.0 Phosphoric acid plant, ammonium phosphate Red mud/bauxite 3.0 4.0-4.5 Mining and extraction of alumina from bauxite Lime stone - 50.0 - Iron tailings - 11.25 - Total 77.14 147.05 Table 2: Sources and quantum of …
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Distribution, sources and toxicity of heavy metals in surface …
This study presents spatial distribution, sources and toxicological risks of As, Cr, Cu, Hg, Ni, Pb, and Zn in the surface sediments from north-western Karnataka, southern India. Heavy metals (except Hg) are 1–5 times enriched than upper continental ...
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(PDF) Growth, Yield and Quality of Indian Mustard
A field experiment was conducted during 1992 and 1993 to assess the effect of different sources of sulphur, viz. elemental sulphur, pyrite and gypsum, and levels of sulphur (0,30 and 60 kg/ha) on ...
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Mineral Resources in Karnataka | Kolar | Mysore
Iron ore: Karnataka has over 9,000 million tonnes of iron ore resources, of which the bulk is in the magnetite form. The production during the year 2007-08 crossed 47 million tons. The districts of Bellary and Hospet are …
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Phosphogypsum – An Industrial Byproduct with …
Outside the borders of the US, phosphogypsum is widely used in a number of applications (in India, phosphogypsum has been redefined as a co-product, further encouraging its reuse). Like many industrial byproducts, its use is …
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226Ra and possible water contamination due to phosphate …
The raw material used in the production of fetilizers is phosphate ore containing various amounts of naturally radioactive elements. During phosphate ore processing, owing to chemical properties of radium, practically all226Ra gets incorporated into phosphogypsum and becomes the main source of radioactivity. This study was carried out in a fertilizer factory in central Croatia, …
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Phosphogypsum – An Industrial Byproduct with Value
This necessitates thorough testing of phosphogypsum to confirm feasibility and gather the data necessary for scale up around the unique source of phosphogypsum to be processed and its intended application. Conclusion. Phosphogypsum is a large-scale waste in the phosphates industry, incurring substantial management costs every year.
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