Cold purification filter cakes generated in the hydrometallurgical processing of Angouran mine zinc concentrate commonly contain significant amounts of Zn, Cd, and Ni ions and thus are valuable resources for metal rec...Cold purification filter cakes generated in the hydrometallurgical processing of Angouran mine zinc concentrate commonly contain significant amounts of Zn, Cd, and Ni ions and thus are valuable resources for metal recovery. In this research, a nickel containing solution that was obtained from sulfuric acid leaching of the filter cake following cadmium and zinc removal was subjected to solvent extraction experiments using 10vol%LIX984N diluted in kerosene. Under optimum experimental conditions （pH 5.3, volume ratio of organic/aqueous （O：A） = 2：1, and contact time -5 min）, more than 97.1% of nickel was extracted. Nickel was stripped from the loaded organic by contacting with a 200 g/L sulfuric acid solution, from which 77.7% of nickel was recovered in a single contact at the optimum conditions （pH 1-1.5, O：A =5：1, and contact time =15 min）.展开更多
In this paper,the existence theorem for a quasi solution of an inverse fractional stochastic parabolic equation driven by multiplicative noise in the form cD_(t)^(a)u-div(g(x,▽u))=f(x,u)+σ(x,u)w(t)is given.In this e...In this paper,the existence theorem for a quasi solution of an inverse fractional stochastic parabolic equation driven by multiplicative noise in the form cD_(t)^(a)u-div(g(x,▽u))=f(x,u)+σ(x,u)w(t)is given.In this equation,the fractional derivative is considered in the Caputo sense.Also,the random function g is unknown and should be determined.To identify the unknown coefficient,the minimization and stochastic variational formulation methods in a fractional stochastic Sobolev space are used.Indeed,we obtain a stability estimation and then prove the continuity of the minimization functional using obtained stability estimation.These results show the existence of the quasi solution for the mentioned problem.展开更多
基金the Miyaneh Branch, Islamic Azad University, Iran for the fnancial support given for this study
文摘Cold purification filter cakes generated in the hydrometallurgical processing of Angouran mine zinc concentrate commonly contain significant amounts of Zn, Cd, and Ni ions and thus are valuable resources for metal recovery. In this research, a nickel containing solution that was obtained from sulfuric acid leaching of the filter cake following cadmium and zinc removal was subjected to solvent extraction experiments using 10vol%LIX984N diluted in kerosene. Under optimum experimental conditions （pH 5.3, volume ratio of organic/aqueous （O：A） = 2：1, and contact time -5 min）, more than 97.1% of nickel was extracted. Nickel was stripped from the loaded organic by contacting with a 200 g/L sulfuric acid solution, from which 77.7% of nickel was recovered in a single contact at the optimum conditions （pH 1-1.5, O：A =5：1, and contact time =15 min）.
文摘In this paper,the existence theorem for a quasi solution of an inverse fractional stochastic parabolic equation driven by multiplicative noise in the form cD_(t)^(a)u-div(g(x,▽u))=f(x,u)+σ(x,u)w(t)is given.In this equation,the fractional derivative is considered in the Caputo sense.Also,the random function g is unknown and should be determined.To identify the unknown coefficient,the minimization and stochastic variational formulation methods in a fractional stochastic Sobolev space are used.Indeed,we obtain a stability estimation and then prove the continuity of the minimization functional using obtained stability estimation.These results show the existence of the quasi solution for the mentioned problem.
