NOPR Collection:

Solvent extraction and separation studies of osmium (VIII) with Bis-2 ethylhexyl phosphoric acid

1997-01-01T00:00:00Z

Title: Solvent extraction and separation studies of osmium (VIII) with Bis-2 ethylhexyl phosphoric acid Authors: Sherikar, A V; Phalke, P N; Dhadke, P M Abstract: A new method is proposed for the extraction of Os (VIII) from its acidic solution with 0.01M Bis-2 ethylhexyl phosphoric acid (HDEHP). The metal ion from the loaded organic phase is stripped with mixture of thiourea and HCl and then determined by the thioerea method. The method is simple and can be used for the selective extraction and separation of osmium from other metal ions. Page(s): 59-60

Liquid-liquid extraction of trivalent lanthanides from nitric acid by 2-mercapto- 4, 4, 6-trimethyl-( 1H, 4H)-pyrimidine-1-acetic acid

1997-01-01T00:00:00Z

Title: Liquid-liquid extraction of trivalent lanthanides from nitric acid by 2-mercapto- 4, 4, 6-trimethyl-( 1H, 4H)-pyrimidine-1-acetic acid Authors: Kumar, Ashok Abstract: A new method for the extraction and spectrophotometric determination of La (III), Pr(III), Nd(III), Sm(III), Gd(III) and Tb(III) from dilute aqueous nitrate media by 2-mercapto-4, 4, 6-trimethyl-(1H, 4H)-pyrimidine-1-acetic acid (MTPAcH) has been developed. Various polar organic solvents have been examined. Maximum enhancement is observed in the presence of 40% acetonitrile. Very poor extractability necessitated the use of calcium nitrate as the salting out agent. Page(s): 57-58

Synthesis of 8-aminoceramidone derivatives by modified two step process

1997-01-01T00:00:00Z

Title: Synthesis of 8-aminoceramidone derivatives by modified two step process Authors: Raval, D A; Chauhan, Y B Abstract: Disperse dyes of the type 8-aminoceramidone derivatives have been synthesized by condensation of bromamine acid (1-amino-4-bromoanthraquinone-2-sulfonic acid) with various arylamines followed by simultaneous desulphonation and cyclization with a mixture of concentrated sulphuric and orthophosphoric acids which saves the time and reduces the cost. Addition of optimum quantity of urea minimizes charring of the dyes by concentrated acids. The dyeing properties of these fifteen dyes have been assessed on polyesters. Page(s): 53-56

Mercury spillage through smoke-stakes of an integrated steel plant: Effects on soil and ground water

1997-01-01T00:00:00Z

Title: Mercury spillage through smoke-stakes of an integrated steel plant: Effects on soil and ground water Authors: Pervez, Shamsh; Pandey, G S Abstract: Massive coal consumption has been shown by steel industries. Mercury emission from the stacks of steel industries was reported earlier. The respective samples of soil, ground water and pond water were collected from the susceptible and non-susceptible sites around the steel plant within a distance of 10 km. Samples were analyzed for the presence of mercury by mercury analyzer. Mercury concentration more than 1:0 ppm was observed in soils of high susceptible Sites. Mercury concentration in the range of 0.5-1.0 ppm was observed in the east and west direction of the plant upto a distance of 7 km. In case of ground water and pond water contamination, mercury concentration was found to be more than 10.0 ppb upto a distance of 10 km at high susceptible sites. Concentration range of 10.0 ppb-1.0 ppb was observed within the distance of 7 km at less susceptible sites. Concentration below the permissible limits for drinking water (1.0 ppb) was observed beyond the distance of 7 km at less susceptible sites. Page(s): 49-52