آخرین محصولات

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 ...

Conventional and Non Conventional Sources of Energy

Main Sources of Energy: The sources of energy are of following types: Conventional Sources of Energy: These sources of energy are also called non renewable sources. These sources of energy are in limited quantity except hydro-electric power. (a) Coal and Lignite: Coal is the major source of energy. Coal deposits in India are 148790 million tonnes.

External dose measurements in the Eloor industrial area in …

Table 3. Comparison of mean indoor radia on dose in the study area with those reported in the other environments in the country. Place Dose (µGy y-1) (12) Gogi, Karnataka 1051.2 Gudalore, South India(13) 1195.3 Coonoor, South India(14) 1385.8 Indian average (14) 604 Ullal Beach(15) 2067 Present study 1221 Table 2.

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 ...

Response of Groundnut (Arachis hypogaea L.) to Different …

One such source is phosphogypsum. Phosphogypsum, is solid waste by-product of wet phosphoric acid production from rock phosphate. It supplies sulphur (13-16%), calcium …

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

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 …

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.

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, …

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.

Efficacy of phosphogypsum and magnesium sulphate as sources …

Therefore, phosphogypsum can thus serve as the source of sulphur and calcium for plant growth like mineral gypsum. On the other hand, magnesium sulphate which is produced and used most commonly in India, is the Epsom salt, MgS04 .7H20 containing 16% MgO and 13% S. Only recently, magnesium sulphate has been included in the Fertiliser Control ...

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 …

Resource utilization and development of phosphogypsum …

Phosphogypsum (PG) is a bulk industrial solid waste of wet-process phosphoric acid production. Every ton of phosphoric acid production generates as many as 4–6 tons of PG, including more than 90% of CaSO 4 ·2H 2 O, a small amount of phosphorus, fluorine, organic matter, oxides, heavy metals, radioactive substances and other impurities that have serious …

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 ...

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 ...

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 …

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).

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 …

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.

Utilization of phosphogypsum and phosphate in improving …

Exploring the utilization of phosphogypsum holds promise to reduce the burdens on environment. • MOC samples with phosphogypsum and KH 2 PO 4 exhibit lower cost and carbon emissions than pure MOC samples.. The water resistance of MOC with phosphogypsum and KH 2 PO 4 gets greatly improved.. Incorporation of 1 % KH 2 PO 4 in PG-MOC relieves …

Phosphate solubilizers from the rhizosphere of Piper …

The best carbon source for phosphate solubilisation among 5 different sources, glucose, sucrose, galactose, maltose, and arabinose, was glucose which allows for releasing 797mg/L of P.

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.

(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 ...

Spatial distribution mapping of drinking water fluoride …

This analysis was performed using an ion-selective electrode (ISE), and mean determination readings for n = 5 samples collected at each Karnataka water source were recorded. Results: The F - concentration in drinking water in Karnataka state was found to vary substantially, with the highest mean values recorded being in the north-eastern zone ...

Integrated Water Resources Management in Karnataka, …

This paper is based on the draft Concept Paper for the Karnataka Integrated and Sustainable Water Resources Management Investment Program, Prepared for the State Government of Karnataka and the Asian Development Bank, September, 2012. 2 Economic Advisor to Chief Minister, Government of Karnataka, Bangalore, India. Email: kvraju2008@gmail

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.

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 ...

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 ...

Sources Of Karnataka History,vol.1 : …

Book Source: Digital Library of India Item 2015.95713 dc.contributor.author: Sastri,s.srikantha dc.date.accessioned: T15:06:02Z dc.date.available: 2015-07 ...

Phosphogypsum: Properties and Potential Use in Agriculture

Soil is among the most important natural resources that can be degraded in varied forms. Soil degradation is a change in the soil's health that reduces its ability to provide goods and services (FAO and ITPS 2015). Population and income growth are expected to necessitate a 70% increase in global food production by 2050 an…

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