1Department of Chemistry, Jaipur National University Jagatpura Jaipur Rajasthan India
2Indian Institute of Integrative Medicine (IIIM) jammu India
Faridabad, is an industrialised city of Haryana and forms a part of National Capital Region (NCR). The fast expansion of urban, agricultural and industrial activities followed by rapid growth of population and drastic change in the lifestyle of humans has resulted in environmental pollution. Besides, the absence of proper disposal facilities for wastes has further contributed to the environmental degradation especially that of surface as well as ground water resources in our country. Exposure to heavy metals and pesticides above permissible limits have caused several incidents all over the world in which toxicity of these elements / chemicals have caused major health problems in humans and even death. The objective of the study was to investigate the occurrence of heavy metals namely : Mercury (Hg), Cadmium (Cd), Zinc (Zn), Arsenic (As) and pesticides namely : Chlorobenzilate, Hexachloro-benzene, Benzenether, pp-DDT, op-DDT, pp-DDE, pp-DDD, alpha-HCH, Beta- HCH, Lindane, Vinclozolin, Conumaphos, Malathion, Phosalone, Cyfluthrin, Cypermethrin, Deltamethrin, Permethrin, Fenvalerate, Fluvalinate, Cyhalothrin, Carbofurn, Propoxeur, Carbaryl, Cymiazol, Amitraz, Bromprophylate, Chinomethionate in potable (tap) water samples collected from various areas of Faridabad.
Department of Chemistry Dayanand Girls P.G. college Kanpur-208001 India
A kinetic study of oxidation of Resorcinol has been investigated in presence and absence of a cationic micelle, cetyl pyridium bromide (CPBr). It is observed that the rate was rapidly increased in the presence of surfactant. The rate was independent of the initial concentration of CAT, both in the presence and absence of surfactant. A first order kinetics is observed with respect to [CAT], both in presence and absence of micelle. Activation parameters for the reaction are evaluated and the plausible mechanism is suggested.
1Department of Chemistry Govt Holkar Autonomous Science College Indore-17 India
2SCM institute of Professional Studies, 70 Ganesh Ganj indore India
The effect of Mn(II) was observed on the rate of reaction of deamination and decarboxylation of some amino acids i.e. glycine and L-isomers of amino acids(L-Alanine, L-Valine and L-Luecine) in presence of anionic surfactant (sodium lauryl sulphate) by acidic potassium permanganate. A Kinetic investigation of oxidation of amino acids by acidic permanganate has been carried out spectrophotometrically.The Mn(II) ion taken for experiment in different concentrations in the form of
MnSO4 salt. The reaction is reported as linear double stage process, first stage is followed by second fast stage.
1*Department of Chemistry , East West Institute of Technology Bangalore India
2Department of Chemistry , Vivekanand Institute of Technology Bangalore India
3Research Scholar Department of Chemistry , Dravidian University Kuppam AP India and SJB Institute of Technology Bangalore India
Metal matrix composites (MMCs) are engineering combinations of two or more materials of which the base material being a metal or its alloy, where tailored properties are achieved by systematic combination of different constituents. These are heterogeneous materials consisting of two or more phases which are in intimate contact with each other on
a microscopic scale. These composite materials can be made by the dispersion of fibers, whiskers or particles as dispersoids in a metal matrix and exhibit combinations of properties which are difficult to achieve in monolithic materials. Out of the different forms of composite materials, particle reinforced composites are promising because of their isotropic properties and low cost. New aluminium based composites have been developed and they are being viewed as potential industrial products particularly in defense and automotive sectors. In particulate reinforced
composites, investigations have been carried out with less expensive dispersoids to attain desirable thermal, mechanical and corrosion resistance properties to suit various applications, where cost effectiveness along with performance matters. These materials have a lot of potential to be used in marine, mining and mineral processing
industries also, on account of their excellent characteristics like thermal conductivity, wear resistance and corrosion resistance. In order to use these materials in such industries, they are required to withstand high corrosive environments. Thus, there is a need to study the corrosion behaviors of AMCs reinforced with ceramic dispersoids. In order to extend the use of AMCs into other industries, it is also essential to investigate their corrosion behavior in different environments like acidic, basic, neutral and marine conditions.The present work has been carried out to evaluate the corrosion behavior of AMCs reinforced with ceramic dispersoids in various environments, since not much research work has been done on AMCs; the present work was taken up. Stress corrosion studies were conducted by using natural sea water as a corrodent. Both composites and corresponding base alloys were subjected to identical test conditions to understand the influence of the reinforcement on alloy, corrosion behavior and effective corrosion control. Composites became less prone to corrosion and pit formation than that of matrix alloy, which may be due to inert zircon particles present in the metal matrix composites. Corrosion of alloys can be effectively controlled by converting them in to composites by the addition of inert materials like zircon particulates.
P.G. Centre of Chemistry (M.U.) College of Commerce Patna -800020 India
Some bis-chelates of Ti(III), Cr Mn(III) Co(III) and ligated by 2-aminothiophenol have been prepared and investigated using elemental analysis, magnetic moment, conductometric, IR, and UV-Vis spectral data. The ligand acts as bindentate (N,S) and trans-octahedral configuration to all complexes have been assigned.
1Assistant Professor, Department of Civil engineering A.I.T. Bangalore India
2Subject Matter Expert ,Pearson Education Services Pvt Ltd Bangalore India
In the present study, efficiency of commercially obtained Powdered Activated Carbon as adsorbent in the removal of Cr(VI) ions was investigated under controlled laboratory Batch conditions. The experiments were carried out for kinetic studies on the removal efficiency by monitoring for variation with contact time, pH and strength of adsorbent-adsorbate. The removal efficiency was found to increase from 27.50 to 99.38%, with increase in the activated carbon dosage from 1 to 30gm/l. It however shared an inverse relationship with initial chromium (VI) concentration and pH, with the optimum being 2. Adsorption isotherm studies revealed that the Langmuir and Freundlich models confirmed well with the removal process, while Dubinin-Radushkevich (D-R) did not fit the equilibrium data. The plot of log qe versus log Ce, unraveled
value of ‘n’ value to be 9.81, thereby indicating good adsorption. The removal process followed mono-layer adsorption, under the influence of Vander-Waals forces. The overall study indicated adsorption by activated carbon as an alternative and reliable technique in efficient hexavalent chromium removal.
1P.G. Centre of Chemistry (M.U.) College of Commerce Patna -800020 India
Ganga Devi Mahila Mahavidyalaya patna India
Organometallic derivatives of rhodium(1) of the type [RhX(P3)2(ligand)] (X = Cl-, Br-, NCS- & - SnCl3), [Rh X(P3) (CO)(ligand)] (X = Cl-/ Br-) and [Rh(P3)2)] (Py) (ligand)] BF4 have been synthesized using [Rh(P3)3] (X = Cl/ Br) as precursor and parachloro, paramethyl, paramethoxy and Para ethoxy derivatives of 1-phenyl tetrazoline-5thione as ligand. The oxidation state or rhodium in compounds was verified by titrating with cerric ammonium sulphate using ferroin as indicator. All four coordinated compounds are isostuctural with square planar precursor indicated by various physicochemical data.
1Department of Chemistry Bhalerao Science College seoner Dist Nagpur M.S India
2Department of Physics ,L.A.D College Shankar Nagar Square Nagpur M.S. India
Structural characteristic and electrical properties of new type of perovskites with formula Ba x [Dy 0.25 Li 0.25 Be 0.50 ] 1-x TiO3 (0 < x <1) are prepared and investigated. The new perovskite Dy 0.25 Li 0.25 Be 0.50 TiO3. Crystallizes with orthorhombic distorted perovskite structure ,while Ba x [Dy0.25 Li 0.25 Be 0.50] 1-x TiO3 (0 < x <1) crystallizes with tetragonal distorted perovskite structure. Because of high melting points of oxides used here, samples are usually prepared by pressing and sintering powder. The anomaly in the relationship between electrical conductivity and dopant concentration in BaTiO3 is related to obstruction of grain growth during sintering. Above a certain dopant concentration the microstructure remains fine grained , thus resulting in the suppression of electrical conductivity due to existence of barrier layers. The concentration of Ba vacancies is added by the do pant concentration, and by the partial pressure of oxygen PTC type BaTiO3 ceramics were prepared and analyzed. The electrical properties of the composition in the series Ba x [Dy 0.25 Li 0.25 Be 0.50 ] 1-x TiO3 ( 0 < x <1) are reported. A probable mechanism for the conduction in these compounds bis also proposed.
1,2P.G. Centre of Chemistry (M.U.) College of Commerce Patna -800020 India
Low-ligated Palladium (O) complexes of the type [Pd (P3)2 (ligand)2] are synthesized with precursor [Pd (P3)4] in benzene by the ligand substitution reaction. All isolated products are stable solid and the palladium atom is tetra coordinated having tetrahedral configuration. The oxidative addition products of precursor and new isolated products
with inorganic acids are examined using elemental analysis, infrared, l H NMR, 31P NMR and electronic spectral data.
Department of Chemistry Govt raza P.G College Rampur U.P India
Ion solvent interaction measurements of Bleaching Powder (antiseptics) and Butanol & Water carried out for the study of solutesolvent interaction. Various acoustic parameters (intermolecular free length, isentropic compressibility, specific acoustic impedence, molar sound velocity, apparent molal adiabatic compressibility, relative association and solvation number) have been evaluated using ultrasonic velocity data. The results were discussed in the light of solute-solvent interaction between the molecules.