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Synergism effect of collectors on copper recovery in flotation of copper smelting slags
Mostafa Shamsi,Mohammad Noaparast,Seied Ziadin Shafaie,Mahdi Gharabaghi 한국자원공학회 2016 Geosystem engineering Vol.19 No.2
Study on the effect of collectors synergism on flotation recovery of copper from copper smelting slags has been described in this paper. After analysis of flotation tests, modeling of copper recovery from slags containing this metal was done. Following the model validation, optimization of effective parameters on Cu recovery was performed. Results of optimization showed that when 10 g/t Z6 as collector and 50 g/t AERO 3477 as modifier were used separately, copper recovery (62.23%) was obtained under optimal conditions. To increase the copper recovery, a mixture of 6 g/t Z6, 4 g/t Z11, 30 g/t AERO 3477, and 20 g/t AERO 208 were used to determine synergism effect of collectors on copper recovery. After doing flotation tests at optimal conditions with mixture of collectors, copper recovery was increased to 80.27%.
Masoome Parijaee,Mohammad Noaparast,Kamal Saberyan,Sayyed Ziaadin Shafaie-Tonkaboni 한국화학공학회 2014 Korean Journal of Chemical Engineering Vol.31 No.12
Adsorption of vanadium(V) from acidic solutions was investigated by using octylamine functionalizedmagnetite nanoparticles as a novel adsorbent of vanadium. Batch experiments were conducted to determine the effectsof initial pH, nanoparticles to octylamine weight ratio, amount of adsorbent, stirring time and initial vanadium(V) con-centration in aqueous solution on adsorption efficiency. The adsorption was highly pH dependent, and the optimal pHwas 3.2. The weight ratio of magnetite nanoparticles to octylamine was studied in optimum pH, and the best resultwas 3 : 2. More than 88% of vanadium(V) in solution was removed by 38.4 mg of adsorbent. In kinetics studies, theadsorption equilibrium could be achieved within 10 minutes, and the experimental data were well fitted by the pseudo-second-order model. Comparison of Langmuir and Freundlich isotherm models indicated a better fit of Langmuir modelto the adsorption of vanadium(V) and the mono-layer adsorption capacity for vanadium(V) was 25.707 mg g−1.