Rai H.C.,Bra Bihar University |
Sharma M.,Dr Jm College |
Sharma A.,Government Polytechnic |
Kumari S.,Bra Bihar University |
And 2 more authors.
Asian Journal of Chemistry | Year: 2010
A series of 17 minerals belonging to amphibole group were analyzed in order to probe into the role of diadochy in their formation. All the three subgroups of amphibole are represented in these samples. Samples of each mineral have been collected from three different regions so in all 51 samples have been analyzed. All the factors controlling diadochic distribution namely ionic size, ionic charge and charge/radius ratio have been considered. Goldschmidt rules have been found to follow. Out of three parameters namely size, charge and valency, the first one seems to play pivotal role in diadochic substitutions. Stereochemical factors have also been found to influence the phenomenon significantly. The paper will enhance the understanding of formation of this important class of mineral, which have received scanty attention due to complicated crystal structures and will be useful in making new alloys.
Sandwar B.B.,Samastipur College |
Kumar R.,High School
Journal of Industrial Pollution Control | Year: 2010
In the Current Global Scenario, Electronic wastes have undoubtly caused an enormous Potential risk to the Environment. This paper deals with the existing Global Trends in E-wastes ,its adverse consequences on the Environment, recycling Practices commonly adopted in the world particularly in Asian Countries,Various Treatment Techniques & Environmental Legislations, Acts& regulations so as to suggest these Industries to effectively Implement their Treatment Technologies leading to the creation of pollution free Zone in & around these Electronics based Industries. © EM International.
Yadav K.,Samastipur College |
Kumari A.,Lalit Narayan Mithila University |
Kumar M.,Smrck College
Asian Journal of Chemistry | Year: 2013
Densitites (r), visocisities (h) and ultrasonic velocities for binary liquid mixtures formed from benzene and carbon tetrachloride with cumene and psedocumene have been measured at two different temperatures 303.15 and 293.15 K. Excess volume of mixing (nE), deviation of excess volume (ΔnE) from ideal mole fraction law and parameter (d) as a measure of strengh of interaction between components of binary mixtures have been calculated from the data of densities and viscosities. Excess volumes have been found to be negative and positive in sign for binary mixtrue of carbon tetrachloride with cumene and pseudocumene and carbon tetrachloride with benzene at entire mole-fraction range and at both temperatures 303.15 and 293.15 K. On the other hand, Dh were found to be negative for binary mixtures of carbon tetrachloride with cumene and pseudocumene except the binary mixture of carbon tetrachloride with benzene at entire mole fraction range and temperatures mentioned. Positive value of excess volumes for three mixtures (carbon tetrachloride with benzene, cumene and pseudocumene) show weak molecular interactions between components. However, the negative value of Dh for binary mixtures of carbon tetrachloride with cumene and pseudocunene show weak interactions between components. The experimental values of excess volumes of mixing (nE) have been analyzed in the light of Flory's theory.
Sandwar B.B.,Samastipur College |
Pollution Research | Year: 2010
The present paper deals with the current Industrial scenario in Bihar with special reference to Barauni- Mokameh Industrial Complex. More emphasis has been given on the physico-chemical characteristics of Industrial Effluents discharge by Barauni oil Refinery as well as various Primary and secondary treatment methods adopted to prevent any Industrial Pollution to River Ganga or atmospheric pollution in the surrounding areas. Bioremediation techniques have also been discussed. All possible treatment methods have been discussed in order to minimize the level of phenols, oil & grease and selected heavy metals viz. chromium, lead, nickel, zinc, manganese, cadmium and copper so that their concentration should be below the permissible limit as recommended by various regulatory authorities viz. Central Pollution Control Board, New Delhi, Bureau of Indian Standard (B.I.S.) and W.H.O. Copyright © EM International.