共搜索到17633条信息，每页显示10条信息，共1764页。用时：0小时0分0秒904毫秒
every two days. The pH value, oxidation-reduction potential and the cell concentration in solution were measured. The pH value of the bioleaching system was measured with a pH probe calibrated...J. Cent. South Univ. Technol. (2011) 18: 381-385 DOI: 10.1007/s11771-011-0707-5 Effect of L-cysteine on bioleaching of Ni-Cu sulphide by A. manzaensis HE Zhi-guo(贺治国)1, 2, ZHAO Jian-cun(赵健存)1, 2......
J. Cent. South Univ. Technol. (2008) 15: 503-507 DOI: 10.1007/s11771-008-0095-7 Bioleaching of sphalerite by Acidithiobacillus ferrooxidans and Acidithiobacillus thiooxidans cultured in 9K medium... medium modified with pyrrhotite was studied. Bioleaching of flotation concentrate of sphalerite by the selected bacteria was carried out. The results show that the microorganisms cultured by pyrrhotite......
形式富集在余渣中. 关键词:Pb/Zn冶炼废渣；有价金属；生物浸出；浸出条件优化 中图分类号:TF 18; X 705 文献标识码:A Optimization on bioleaching of metal values from Pb/Zn smelting slag GUO Zhao-hui1, 2, CHENG Yi2... and Engineering, Central South University, Changsha 410083, China) Abstract: In this study, the main variables involved in the bioleaching process include temperature, pH, pulp density and leaching time......
be oxidized and dissolved effectively in ammonia solution with sodium persulfate as an oxidant, so we can infer that a more efficient oxidant will promote the dissolution of copper sulfide in bioleaching...J. Cent. South Univ. (2017) 24: 2245-2252 DOI: https://doi.org/10.1007/s11771-017-3634-2 Effect of ultraviolet mutagenesis on heterotrophic strain mutation and bioleaching of low grade copper ore WU......
J. Cent. South Univ. Technol. (2007)04-0474-05 DOI: 10.1007/s11771-007-0092-2 Bioleaching of chalcopyrite by mixed culture of moderately thermophilic microorganisms WU Chang-bin(邬长斌)1,2, ZENG Wei... collected from several sulphide mines in China, and the bioleaching of chalcopyrite was conducted both in shake flask and bioreactor. The results show that in the shake flask, the mixture can......
of bioleaching of primary copper sulfide ores, the redox potentials in solution are lowered with the addition of activated carbon and maintained under 650 mV for a long time (Fig.4). The Eh values... in solution. The inhibition increases with increase of the resting time. The complete oxidation of ferrous ions is not achieved after 600 h of bioleaching except under the condition of 0 d resting......
of desired solution pH with diluted sulphuric acid. Since solid feed to a bioleaching/biooxidation process does not have uniform distribution of particle size and uniform particle shape... to the observed increase in its solution pH. 3.2.3 Mineral pulp density and ore mineralogy The results of the effects of pulp density determined by bioleaching at a stirring speed of 150 r/min, pH of 2.0......
; (15) After a few nutrition Fe2+ ions in the solution are consumed rapidly by bacteria, H+ from agar phase makes the pH value of solution phase decrease again. Finally, bioleaching in agar phase, H... with experiment 2. This indicates that A. ferrooxidans first prefer Fe2+ as energy to metabolize. The solution phase maintains higher pH values of about 1.88 at the later stage of bioleaching according......
(A. manzaensis) YN25 to the bioleaching of chalcopyrite, three experiments were carried out in the modified shake flasks. The redox potential, pH, cell density, copper and iron ions in the solution were monitored... bioleaching of chalcopyrite As shown in Fig.4, the solution redox potential of experiment A reached about 570 mV (vs Ag/AgCl) at the end of the experiments, and the solution redox potential of experiment......
in solution as function of time Fig.4 Variations of total iron, ferrous and ferric ion concentrations in bioleaching experiment: (a) Original culture; (b) Preserved culture after 15 months final.... For the unpreserved culture, copper concentration in solution increased slightly from 44th to the 80th day, and the copper extraction finally increased to 19.6 g/L. While bioleaching of chalcopyrite......
