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| 1 | Kinetics of chemical leaching of chalcopyrite from low grade copper ore: behavior of different size fractions显示文摘The kinetics of the chemical leaching of copper from low grade ore in ferric sulfate media was investigated using the constrained least square optimization technique. The experiments were carried out for different particle sizes in both the reactor and column at constant oxidation-reduction potential (Eh), pH values, and temperature. The main copper mineral was chalcopyrite. About 40% of Cu recovery is obtained after 7 d of reactor leaching at 85℃ using -0.5 mm size fraction, while the same recovery is obtained at 75℃ after 24 d. Also, about 23% of Cu recovery is obtained after 60 d of column leaching for +4--8 mm size fraction whereas the Cu recovery is as low as about 15% for +8--12.7 and +12.7--25 mm size fractions. A 4-stage model for chalcopyrite dissolution was used to explain the observed dissolution behaviors. The results show that thick over-layers of sulphur components cause the parabolic behavior of chalcopyrite dissolution and the precipitation of Fe3+ plays the main role in chalcopyrite passivation. In the case of coarse particles, transformation from one stage to another takes a longer time, thus only two stages including the initial reaction on fresh surfaces and S0 deposition are observed. | H. Naderi M. Abdollahy N. Mostoufi M.J. Koleini S.A. Shojaosadati Z. Manafi | 2011 | International Journal of Minerals,Metallurgy and Materials2011，18，6： | 6 |
| 2 | Extracellular biopolymeric floeculants recent trends and biotechnological importance 显示文摘 | Salehizadeh H Shojaosadati S A | 2001 | Bioteehnology Advances2001，19，： | 1 |
| 3 | Extracellular biopolymeric flocculants recent trends and biotechnological importance显示文摘 | SALEHIZADEH H SHOJAOSADATI S A | 2001 | Biotechnology Advances2001，19，3： | 1 |
| 4 | Removal of metal ions from aqueous solution by polysaccharide produced from Bacillus firmus 显示文摘 | Salehizadeh H Shojaosadati S A | 2003 | Water Research2003，37，17： | 1 |
| 5 | Optimization of PEGylation Conditions for BSA Nanoparticles Using Response Surface Methodology显示文摘 | Hasan Kouchakzadeh Seyed Abbas Shojaosadati Amir Maghsoudi Ebrahim Vasheghani Farahani | 2010 | AAPS PharmSciTech2010，，3： | 1 |
| 6 | Bioleaching of copper from low-grade ore using isolated bacteria and defined mixed cultures显示文摘 | Ziloue H Shojaosadati A S Khalilzadeh R | 2003 | Iranian Journal of Biotechnology2003，，3： | 1 |
| 7 | Extracellular biopolymeric flocculants:Recent trends and biotechnological importance 显示文摘 | Salehizadeh H Shojaosadati S A | 2001 | Biotechnol Adv2001，19，5： | 1 |
| 8 | Extracellular Biopolymeric Flocculants Recent Trends and Biotechnological Importance显示文摘 | Salehizadeh H Shojaosadati S A | 2001 | Biotechnology Advances2001，19，： | 1 |
| 9 | Extracellular biopolymeric flocculants:recent trends and biotechnology importance显示文摘 | Salehizadeh H Shojaosadati S A | 2001 | Biotechnol2001，19，5： | 1 |
| 10 | Cr and ni recovery during bioleaching of dewatered metal-plating s|udge using acidithiobacillus ferrooxidans 显示文摘 | Rastegar SO Mousavi SM Shojaosadati SA | 2014 | Bioresource Technology2014，167，5： | 1 |
| 11 | Investigation of gas properties, design, and operational parameters on hydrodynamic characteristics, mass transfer, and biomass production from natural gas in an external airlift loop bioreactor 显示文摘 | Yazdian F Shojaosadati S A Nosrati M | 2009 | Chemical Engineering Science2009，64，10： | 1 |
| 12 | Extracellular biopolymeric flocculants recent trends and biotechnological importance 显示文摘 | Salehizadeh H Shojaosadati S A | 2001 | Biotechnology Advances2001，19，： | 1 |
| 13 | Extracellular biopolymeric flocculants recent trends and biotechnological importance显示文摘 | Salchizadch I I Shojaosadati S A | 2001 | Biotechnology Advances2001，19，5： | 1 |
| 14 | Extracellular biopolymeric flocculants: recent trends and biotechnological importance 显示文摘 | Salehizadeh H Shojaosadati S A | 2001 | Biotechnol Adv2001，19，： | 1 |
| 15 | Isolation and characteristation of a bioflocculant produced by Bacillus firmus 显示文摘 | Salehizadeh H Shojaosadati S A | 2002 | Biotechnol Letters2002，24，1： | 1 |
| 16 | Extracellular biopolymeric flocculants recent trends and biotechnological importance 显示文摘 | SALEH/ZADEH H SHOJAOSADATI S A | 2001 | Bioteehnology Advances2001，19，5： | 1 |
| 17 | Citric acid production from apple pomace in multi-layer packed bed solid-state bioreactor显示文摘 | S.A. Shojaosadati V. Babaeipour | 2002 | Process Biochemistry2002，，8： | 1 |
| 18 | 显示文摘 | Salehizadeh H Shojaosadati S A | 2002 | Biotechnology Letters2002，24，： | 1 |
| 19 | Extracellular biopolymeric flocculants recent trends and biotechno- logical importance显示文摘 | Salehizadeh H Shojaosadati S A | 2001 | Biotechnology Advances2001，，19： | 1 |
| 20 | Removal of metal ions from aqueous solution by polysaccharide produced from Bacillus firmus 显示文摘 | Salehizadeh H Shojaosadati S A | 2003 | Water Research2003，37，17： | 1 |
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