Solvent extraction was used to recover nickel and zinc from synthetic acidic solution. Many leaching solution and waste waters contain both zinc and nickel at the same time. Bis (2,4,4trimethylpentyl) phosphinic acid (Cyanex 272) and Di(2-ethylhexyl) phosphoric acid (D2EHPA) were used to separate nickel and zinc. In the D2EHPA system, at equilibrium pH of 2, zinc extraction was more than 98% wh...

A pot experiment was conducted in a completely randomized design, to study the effect of zinc sulphate (ZnSO4) and Ascorbic acid(AS) foliar application application 20 and 40 ppm was compared to the control (distillated water) on flowering Gazania (Gazania rigens L. daybreak red stripe).Results were analyzed by SPSS software and Duncan test. Results showed that ZnSO<...

A pot experiment was conducted in a completely randomized design, to study the effect of zinc sulphate (ZnSO4) and Ascorbic acid(AS) foliar application application 20 and 40 ppm was compared to the control (distillated water) on flowering Gazania (Gazania rigens L. daybreak red stripe).Results were analyzed by SPSS software and Duncan test. Results showed that ZnSO<...

Zinc (Zn) and selenium (Se) exert regulatory activities on immune functions, while cadmium (Cd) is an immunotoxic agent. The object of this study was to detect effects of 10-4, 10-5, and 10-6 M Cd sulphate, Zn sulphate, and sodium selenite, and their combinations on human peripheral blood mononuclear cell (PBMC) proliferation and IFN-γ and TNF-α production. Only 10-5 M Zn sulphate significantly...

More than 80% of the world’s production of zinc from its concentrate is obtained by the roastleach-electrowin hydrometallurgical process. In the roast-leach process, very pure zinc sulphate solution must be prepared for zinc electrowinning, therefore, the purification process is one of the most important unit processes in zinc hydrometallurgy. The conventional methods for the zinc solution puri...