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Singh, A. V.
- Studies of the Flotation of Pyritic Sulphide Ores of Lead From Rajpura Dariba Mine, Udaipur, India
Abstract Views :188 |
PDF Views:2
Authors
A. V. Singh
1,
K. L. Menaria
1
Affiliations
1 Department of Chemistry, J.N.V. University, Jodhpur, IN
1 Department of Chemistry, J.N.V. University, Jodhpur, IN
Source
Journal of Surface Science and Technology, Vol 11, No 1-4 (1995), Pagination: 91-96Abstract
Experiments on the beneficiation of multimetal pyritic sulphidc ore of lead-zinc-copper from Rajpura Dariba Mine of Hindustan Zinc Limited, Udaipur (India) conducted, using chemical auxiliaries based on guargum and its derivatives as depressant systems without any basic alteration in plant operating conditions, yielded better metallurgical results for recovery of lead values in flotation of lead concentrate. The silica depressants studied in the present investigation includes sodium silicate, guargum as well as its cationic derivative along with sodium isopropyl xanthane (IPX) as collector and Mehtyl lsobutyl Ketone (MIBK) as frother. The other operating parameters, viz. reagents, concentration and pH of the pulp were also systematically studied and optimized. The improved metallurgical results were obtained with a combination of sodium silicate and cationic guargum as silica depressant at pH 8.0.
- Synthesis and Rheological Properties of Guaran Grafted Polyacrylonitrile (G-g-PAN) Copolymer
Abstract Views :205 |
PDF Views:0
Authors
Affiliations
1 Department of Chemistry, J. N. V University, Jodhpur - 342 005 (Rajasthan), IN
1 Department of Chemistry, J. N. V University, Jodhpur - 342 005 (Rajasthan), IN
Source
Journal of Surface Science and Technology, Vol 18, No 3-4 (2002), Pagination: 105-112Abstract
Guaran was transformed into grafted polymer using different vinyl monomer. The vinyl monomer used for the graft was acrylonitrile. The grafting was initiated through the formation of free radical centers on the polymer backbone by oxidation of guaran with cerium (IV) in nitric acid medium. The degree of grafting was varied by using varing amount of acylonitrile vinyl monomer. The rheological properties of the guaran grafted polyacrylonitrile copolymer have been studied by varying the degree of grafing, time, concentration, temperature, spindle number and shear rate.Keywords
Guaran, Grafting, Vinyl Monomer, Hydration Time, Shear Rate, Rheological Properties.- Atmospheric N and P deposition in the Ganges Basin
Abstract Views :280 |
PDF Views:71
Authors
Affiliations
1 Environmental Science Division, Centre of Advanced Study in Botany, Banaras Hindu University, Varanasi 221 005, IN
2 Department of Botany, Mahatma Gandhi Kashividyapith, Varanasi 221 002, IN
3 Department of Chemistry, Maulana Azad Institute of Humanity, Science and Technology, Sitapur 261 203, IN
1 Environmental Science Division, Centre of Advanced Study in Botany, Banaras Hindu University, Varanasi 221 005, IN
2 Department of Botany, Mahatma Gandhi Kashividyapith, Varanasi 221 002, IN
3 Department of Chemistry, Maulana Azad Institute of Humanity, Science and Technology, Sitapur 261 203, IN
Source
Current Science, Vol 110, No 6 (2016), Pagination: 974-976Abstract
The atmosphere-land-water connectivity of nutrients is not altogether accounted for in the Ganges Basin despite recent studies highlighting its importance. Together with surface inputs, rivers receive N and P through atmospheric deposition (AD), directly on water surfaces, and through lateral transport. Globally, anthropogenic- input of reactive nitrogen (Nr) has increased from ˜15 Tg in 1860 to 187 Tg by 2005 (ref. 1) and is predicted to be doubled by 2050 (ref. 2).Full Text