The extraction and separation of zinc, manganese, cobalt and nickel from nickel laterite bacteria leach liquor were carried out using sodium salts of TOPS-99 and Cyanex 272 in kerosene. The unwanted metal ions were re...The extraction and separation of zinc, manganese, cobalt and nickel from nickel laterite bacteria leach liquor were carried out using sodium salts of TOPS-99 and Cyanex 272 in kerosene. The unwanted metal ions were removed by precipitation method and solvent extraction was used to extract/separate Zn, Mn, Co and Ni. The nickel laterite leach liquor which was obtained from bioleaching of chromite overburden samples contained 3.72 g/L Fe, 2.08 g/L Al, 0.44 g/L Ni, 0.02 g/L Co, 0.13 g/L Mn, 0.14 g/L Zn and 0.22 g/L Cr. From this leach liquor, 100% Fe, 96.98% Al and 70.42% Cr were removed by precipitation with Ca CO_3 at pH 4.4 followed by precipitation of remaining Al and Cr with 50% ammonia at p H 5.4. After precipitation, the extraction of Zn from the Fe, Al and Cr free leach liquor was carried out with 0.1 mol/L TOPS-99 followed by Mn extraction with 0.04 mol/L Na TOPS-99. The yields of Zn and Mn were 97.77% and 95.63%, respectively. After Mn extraction, cobalt was removed from the leach liquor using 0.0125 mol/L Na Cyanex 272 and finally nickel extraction was carried out using 0.12 mol/L Na TOPS-99 with 99.84% yield. The stripping of loaded organic（LO） phases were achieved with dilute H_2SO_4.展开更多
The work presents the synthesis and characterization of amidated pectin(AP) based polymer electrolyte membranes(PEM) crosslinked with glutaraldehyde(GA).The prepared membranes are characterized by Fourier transform in...The work presents the synthesis and characterization of amidated pectin(AP) based polymer electrolyte membranes(PEM) crosslinked with glutaraldehyde(GA).The prepared membranes are characterized by Fourier transform infrared spectroscopy(FTIR),organic elemental analysis,X-ray diffraction studies(XRD),thermogravimetric analysis (TGA) and impedance spectroscopy.Mechanical properties of the membranes are evaluated by tensile tests.The degree of amidation(DA),molar and mass reaction yields(Y_M and K_N) are calcu...展开更多
Addressing social issues is very crucial for government and thus government is primarily expected to create an enabling environment for raising awareness and stimulating public debate for the existing social challenge...Addressing social issues is very crucial for government and thus government is primarily expected to create an enabling environment for raising awareness and stimulating public debate for the existing social challenges and issues.Indian government is proactive to encourage legal mandates in various dimensions enabling responsible business practices.What organizations do with their money is being increasingly caught on the public radar leading to bringing ethical issues to the forefront.The paper is an effort to understand how financial responsible effort is playing out in the state-owned enterprises(SOEs),and also the effort towards handling corporate social responsibility(CSR)across SOEs in India.The paper elaborates whether ethical financing is a form of social responsibility in organizations and elaborates the status of responsible financing of SOEs in India.The paper also discusses the practices encouraging ethical financing in SOEs in India.展开更多
文摘The extraction and separation of zinc, manganese, cobalt and nickel from nickel laterite bacteria leach liquor were carried out using sodium salts of TOPS-99 and Cyanex 272 in kerosene. The unwanted metal ions were removed by precipitation method and solvent extraction was used to extract/separate Zn, Mn, Co and Ni. The nickel laterite leach liquor which was obtained from bioleaching of chromite overburden samples contained 3.72 g/L Fe, 2.08 g/L Al, 0.44 g/L Ni, 0.02 g/L Co, 0.13 g/L Mn, 0.14 g/L Zn and 0.22 g/L Cr. From this leach liquor, 100% Fe, 96.98% Al and 70.42% Cr were removed by precipitation with Ca CO_3 at pH 4.4 followed by precipitation of remaining Al and Cr with 50% ammonia at p H 5.4. After precipitation, the extraction of Zn from the Fe, Al and Cr free leach liquor was carried out with 0.1 mol/L TOPS-99 followed by Mn extraction with 0.04 mol/L Na TOPS-99. The yields of Zn and Mn were 97.77% and 95.63%, respectively. After Mn extraction, cobalt was removed from the leach liquor using 0.0125 mol/L Na Cyanex 272 and finally nickel extraction was carried out using 0.12 mol/L Na TOPS-99 with 99.84% yield. The stripping of loaded organic（LO） phases were achieved with dilute H_2SO_4.
文摘The work presents the synthesis and characterization of amidated pectin(AP) based polymer electrolyte membranes(PEM) crosslinked with glutaraldehyde(GA).The prepared membranes are characterized by Fourier transform infrared spectroscopy(FTIR),organic elemental analysis,X-ray diffraction studies(XRD),thermogravimetric analysis (TGA) and impedance spectroscopy.Mechanical properties of the membranes are evaluated by tensile tests.The degree of amidation(DA),molar and mass reaction yields(Y_M and K_N) are calcu...
文摘Addressing social issues is very crucial for government and thus government is primarily expected to create an enabling environment for raising awareness and stimulating public debate for the existing social challenges and issues.Indian government is proactive to encourage legal mandates in various dimensions enabling responsible business practices.What organizations do with their money is being increasingly caught on the public radar leading to bringing ethical issues to the forefront.The paper is an effort to understand how financial responsible effort is playing out in the state-owned enterprises(SOEs),and also the effort towards handling corporate social responsibility(CSR)across SOEs in India.The paper elaborates whether ethical financing is a form of social responsibility in organizations and elaborates the status of responsible financing of SOEs in India.The paper also discusses the practices encouraging ethical financing in SOEs in India.
