Weathering often induces bituminous materials adsorbing on the sand grains and leads to poor processability of the oil sands. Chemical and microbial pre‐treatment of the prepared weathered ore model and a weathered oil sand ore were carried out to improve the solids surface wettability so as to facilitate the bitumen liberation and recovery. It was found that although all the cetyl trimethylammonium bromide (CTAB), sodium dodecylbenzene sulphonate (SDBS), and microbial culture medium could greatly decrease the surface tension of the solution, the CTAB treatment failed to improve the bitumen liberation, while the SDBS and microbial treatment significantly accelerated the bitumen liberation from the silicon substrates. The wettability analysis showed that the improved bitumen liberation could be attributed to the alteration of the solids surface wettability from hydrophobic to hydrophilic by the SDBS and microbial treatment. Inconsistent with the findings of the bitumen liberation, floatation tests of a weathered ore showed that the CTAB pre‐treatment only gave a low bitumen recovery of 33%, while the SDBS and microbial pre‐treatment improved the processability of the ore. In particular, the microbial treatment was more effective at removing the adsorbed organics from the solids and improved the surface hydrophilicity, resulting in a much better bitumen recovery of 95%. This work provides a way to improve the processability of the weathered ore by altering the solids surface wettability.

中文翻译：

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改变固体表面的润湿性以增强沥青的释放和风化油砂的水基可加工性

风化经常引起沥青材料吸附在沙粒上，并导致油砂的可加工性差。对制备的风化矿石模型和风化油砂矿石进行化学和微生物预处理，以改善固体表面的润湿性，从而促进沥青的释放和回收。发现尽管所有十六烷基三甲基溴化铵（CTAB），十二烷基苯磺酸钠（SDBS）和微生物培养基都可以大大降低溶液的表面张力，但CTAB处理无法改善沥青的释放，而SDBS和微生物处理显着加速了沥青从硅基材中的释放。润湿性分析表明，改善的沥青释放可归因于通过SDBS和微生物处理使固体表面的润湿性从疏水性变为亲水性。与沥青释放的结果不一致，风化矿石的浮选试验表明，CTAB预处理仅产生了33％的低沥青回收率，而SDBS和微生物预处理提高了矿石的可加工性。特别地，微生物处理在从固体中去除吸附的有机物上更有效，并且改善了表面亲水性，从而导致更好的沥青回收率达95％。这项工作提供了一种通过改变固体表面的润湿性来改善风化矿石可加工性的方法。与沥青释放的结果不一致，风化矿石的浮选试验表明，CTAB预处理仅产生了33％的低沥青回收率，而SDBS和微生物预处理提高了矿石的可加工性。特别地，微生物处理在从固体中去除吸附的有机物上更有效，并改善了表面亲水性，导致更好的沥青回收率达95％。这项工作提供了一种通过改变固体表面的润湿性来改善风化矿石可加工性的方法。与沥青释放的结果不一致，风化矿石的浮选试验表明，CTAB预处理仅产生了33％的低沥青回收率，而SDBS和微生物预处理提高了矿石的可加工性。特别地，微生物处理在从固体中去除吸附的有机物上更有效，并且改善了表面亲水性，从而导致更好的沥青回收率达95％。这项工作提供了一种通过改变固体表面的润湿性来改善风化矿石可加工性的方法。微生物处理能更有效地从固体中去除吸附的有机物并改善表面亲水性，从而使沥青的回收率更高，达到95％。这项工作提供了一种通过改变固体表面的润湿性来改善风化矿石可加工性的方法。微生物处理能更有效地从固体中去除吸附的有机物并改善表面亲水性，从而使沥青的回收率更高，达到95％。这项工作提供了一种通过改变固体表面的润湿性来改善风化矿石可加工性的方法。