首页> 外文期刊>Separation and Purification Technology >Enhancement of coal waste slurry flocculation by CTAB combined with bioflocculant produced by Azotobacter chroococcum
【24h】

Enhancement of coal waste slurry flocculation by CTAB combined with bioflocculant produced by Azotobacter chroococcum

机译:CTAB加强煤矸石泥炭絮凝与偶像杆菌生产的生物絮凝剂的增强

获取原文
获取原文并翻译 | 示例
           

摘要

A bioflocculant produced by Azotobacter chroococcum, a natural polymer containing sugar and protein, can be used to flocculate coal waste slurry, but electrostatic repulsion impacts the flocculation of quartz attached to the solid coal particles. In this work, cetyltrimethylammonium bromide (CTAB) combined with this bioflocculant were used to flocculate coal waste slurry. The adsorption and zeta potential of CTAB on quartz, kaolinite, and organic matter were investigated in aqueous media. The results show that the data for CTAB adsorption fit the typical Langmuir adsorption model, and that the CTAB adsorption level is higher in an alkaline medium than in an acidic medium. The electrostatic interaction and formation of at-complexes contributed to the adsorption of CTAB on minerals and organic matter. Zeta potential measurements demonstrated that the point of zero charge values shifted to higher pH values after CTAB adsorption on mineral and organic matter surfaces. Furthermore, the behavior of the bioflocculant with the addition of CTAB was investigated to determine the effect of CTAB on the flocculation of coal waste slurry; quartz, kaolinite, and organic matter were used for comparison. Flocculation tests indicated that the optimum CTAB dosage for obtaining higher flocculation rates and clearer suspension of organic matter, quartz, and kaolinite was 50, 100, and 40 mg/L, respectively. A higher flocculation rate and clearer suspension of quartz were obtained in a very acidic medium, while organic matter suspension continued to increase in the pH range of 2.2-6.2 and remained almost constant in an alkaline medium. In addition, there were no significant changes in the flocculation rate or turbidity of kaolinite with an increase in pH. CTAB exhibited significant enhancement in terms of flocculation of coal waste slurry when the bioflocculant was used as a flocculant. Finally, surface tension measurements were taken to confirm the interaction between the bioflocculant and CTAB. The results show that CTAB could bind to the bioflocculant and form complexes.
机译:通过偶氮杆菌,含有糖和蛋白质的天然聚合物产生的生物絮凝剂可用于絮凝煤废浆料,但静电排斥会影响石英的絮凝附着在固体煤颗粒上。在这项工作中,使用西甲基三甲基溴化铵(CTAB)与这种生物絮凝剂联合用于絮凝煤废浆料。在含水介质中研究了CTAB对石英,高峰和有机物质的吸附和Zeta电位。结果表明,CTAB吸附的数据适合典型的Langmuir吸附模型,并且CTAB吸附水平在碱性介质中比酸性介质更高。静电相互作用和成分的形成有助于CTAB对矿物质和有机物质的吸附。 Zeta电位测量表明,在CTAB在矿物质和有机物质表面上吸附后,零电荷值的点转移到更高的pH值。此外,研究了生物絮凝剂与添加CTAB的行为,以确定CTAB对煤矸石浆料絮凝的影响;使用石英,高潮和有机物质进行比较。絮凝试验表明,用于获得更高的絮凝率和更清除的有机物质,石英和高峰酸盐的最佳CTAB剂量分别为50,100和40mg / L.在非常酸性培养基中获得较高的絮凝率和石英悬浮液,而有机物悬浮液继续在2.2-6.2的pH范围内增加,并且在碱性培养基中保持几乎恒定。此外,高岭土的絮凝率或浊度没有显着变化,pH值增加。当使用生物絮凝剂作为絮凝剂时,CTAB在煤矸石浆料的絮凝方面表现出显着的增强。最后,采用表面张力测量来证实生物絮凝剂和CTAB之间的相互作用。结果表明,CTAB可以与生物絮凝剂结合并形成复合物。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号