Advanced Materials and Processes Research Institute
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Mineralogical and beneficiation characteristics of a lean grade sliceous rock phosphate ore from Hirapur (M.P.).’ \ud
No full textTECHNICAL NOTE ATTENUATION OF HEAVY METAL IONS BY LEAN GRADE PHOSPHORITE.
No full textThe sorption of heavy metal ions (Pb 2÷, Cu z+ and Zn 2+) present as a single and as well as multiple species onto a low grade (<15%P205) carbonatic (CA) and siliceous (SL) phosphorite minerals from Madhya Pradesh (India) was investigated under natural conditions. Sorption of heavy metal ions was found to follow the order: Pb 2+ >Cu2+'> Zn z+ in the cases of single and multiple species. CA\ud
was found effective in removing Pb 2+ with a Pb removal of 82 - 99.9 % and a maximum L.R.C. (lead removal capacity) of 0.082 g of Pb /g of carbonatic phosphorite. \u
`Separation of aqueous lead on francolite surface’.
No full textThe separation of aqueous Pb2� onto a low-grade (�15% P2\ud
O5) carbonate-substituted rock phosphate (Francolite) mineral from Madhya Pradesh (India) was investigated. The effects of different parameters such as initial concentration of Pb2�, particle size of Francolite, and amount of substrate on lead-ion separation were studied\ud
under natural conditions by equilibrating different amounts of Francolite with aqueous lead solutions of different concentrations. Francolite was found capable of leadion separation at par with hydroxyapatite or high-grade (�25% P2\ud
O5) rock phosphate. Francolite was found very effective in removing Pb2� with a minimum lead removal of 82–99.9% and a maximum LRC (lead removal capacity) of 0.082 g of lead/g of\ud
Francolite
Microstructure and Tensile Property Characterization of a Nickel Containing Zinc-Based Alloy: Effects of Heat Treatment and Test Conditions
No full textThis study analyzes the effects produced by heat treatment on the microstructural features, electrical conductivity, hardness and tensile strength, and elongation of a nickel-containing zinc-based alloy. The influences of test temperature and strain rate on the tensile properties of the alloy have also been studied. The as-cast alloy showed primary a dendrites surrounded by eutectoid a+h and o. Heat treatment led to breaking of the dendritic structure and generation of microconstituents with improved uniformity\ud
of distribution. The nickel-containing phase was also observed in as-cast as well as heat-treated conditions. Heat treatment had negligible influence on the morphology of the nickel-containing phase. Tensile properties improved with strain rate. Increasing temperature caused the tensile strength to reduce, while elongation was affected in an opposite manner. Heat-treated specimens attained less tensile strength and hardness but improved elongation as compared with the as-cast alloy. The observed response of the alloy has been explained on the basis of specific features of its various microconstituents and substantiated with its fractographic features and subsurface characteristics
Kinetics and Isotherms for Aqueous Lead Adsorption by Natural Minerals
No full textThe low grade (<15% P2O5) carbonatic rock phosphate and hydroxy aluminosilicate based mineral (pyrophyllite) of Madhya Pradesh (India) were investigated as adsorbents for their possible application for the removal of aqueous lead under static system. The kinetics and effect of temperature on adsorption of lead ions on the above two natural minerals have been studied. The adsorption process follows first-order kinetics and the rate of adsorption and film transfer coefficients are observed to decrease with increase in initial concentration of lead ions in solutions. It has been found that these natural minerals are effective in removing 65−99% of lead ions from 5.0 to 500 mg/L lead solutions. The Langmuir adsorption isotherm was used to represent experimental data for carbonatic rock phosphate whereas the Freundlich adsorption isotherm was found suitable to represent data for pyrophyllite. The adsorption process is found to be endothermic in the case of pyrophyllite and exothermic in the case of carbonatic rock phosphate
`Attenuation of heavy metal ions by lean grade phosphorite.’
No full textThe sorption of heavy metal ions (Pb2+, Cu2+ and Zn2+) present as a single and as well as multiple species onto a low grade (<15%P205) carbonatic (CA) and siliceous (SL) phosphorite minerals from Madhya Pradesh (India) was investigated under natural conditions. Sorption of heavy metal ions was found to follow the order: Pb2+ >Cu2+ > Zn2+ in the cases of single and multiple species. CA was found effective in removing Pb2+, with a Pb removal of 82 – 99.9 % and a maximum L.R.C (lead removal capacity) of 0.082 g of Pb / g of carbonatic phosphorite
Effect of addition of polycarbonateon sheared flow of red mud-filled isotactic polypropylene
No full textErosion-Corrosion Characteristics of Squeeze Cast Aluminium Alloy SiC Composite in Water and Sodium Chloride Solutions Containing Sand
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