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首页> 外文会议>Biohydrometallurgy (Conference) >Effect of sodium chloride on bioleaching of sulfidic ores by mesophilic acidophilic iron-oxidizing bacteria and moderately thermophilic iron/sulfur-oxidizing bacteria
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Effect of sodium chloride on bioleaching of sulfidic ores by mesophilic acidophilic iron-oxidizing bacteria and moderately thermophilic iron/sulfur-oxidizing bacteria

机译：氯化钠对嗜苯酚嗜酸铁氧化细菌和中度嗜热铁/硫氧化细菌的硫酸盐生物烯酸的影响

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In bio-hydrometallurgical operations, besides the challenge with regard to chloride ion, several studies found that chloride could enhance the bacterial leaching of metal sulfides. This study was undertaken to compare the effect of chloride on bacterial growth, iron oxidation activity and bioleaching performance of iron oxidizers at mesophilic and moderate thermophilic temperatures. Sulfobacillus thermosulfidooxidans and Leptospirillum ferriphilum were used for the investigation. The exposure to elevated NaCl concentration affected cell growth and eventual iron oxidation rate in both strains. Sb. thermosulfidooxidans showed better tolerance to NaCl than L. ferriphilum. The minimum inhibitory concentrations of NaCl were 325 mM and 525 mM for L. ferriphilum and Sb. thermosulfidooxidans, respectively. Bioleaching of chalcopyrite and sphalerite-containing ores were studied. For copper-containing sulfide minerals, bioleaching by Sb. thermosulfidooxidans in the presence of 200 mM was similar to bioleaching performance in the absent of NaCl. However, in the presence of NaCl, bioleaching by L. ferriphilum reduced by 50 %. For zinc-containing ores, bioleaching by L. ferriphilum and Sb. thermosulfidooxidans were compared. It is found that NaCl inhibited significantly bioleaching by L. ferriphilum and Sb. thermosulfidooxidans.
机译：除了关于氯离子的挑战之外，还发现氯化物可以增强金属硫化物的细菌浸出。本研究旨在比较氯化物对嗜渗氧化氧化剂的细菌生长，铁氧化活性和生物浸润性能的比较。苏氟氟苯甲苯胺酰辛和乳螺旋状金毛叶磷酸盐用于调查。暴露于升高的NaCl浓度受影响的细胞生长和两种菌株的最终铁氧化率。 SB。热氟苯甲酰氧探测仪对NaCl比L.Ferriphilum呈现更好的耐受性。 L.Ferriphilum和Sb的NaCl的最小抑制浓度为325mm和525mm。热氟苯甲酰辛分别。研究了含氯铜矿和含斯巴尔的矿石的生物浸出。对于含铜硫化物矿物，通过Sb的生物浸出。在没有NaCl的情况下，在200mM存在下，热硫化氧氧氮杂物类似于生物浸入性能。然而，在NaCl存在下，通过L.Ferriphilum的生物浸出减少50％。对于含锌的矿石，通过L.Ferriphilum和Sb的生物浸渍。比较了热氟苯脱氧酰胺。发现NaCl由L.Ferriphilum和Sb显着抑制了显着的生物浸出。热氟苯甲苯胺酰胺。

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