...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Energy & fuels >Dewatering of Oil Sands Tailings with Novel Chitosan-Based Flocculants
【24h】

Dewatering of Oil Sands Tailings with Novel Chitosan-Based Flocculants

机译：新型壳聚糖絮凝剂对油砂尾矿的脱水

获取原文
获取原文并翻译 | 示例
   

获取外文期刊封面封底 >>

       
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Mature fine tailings need to be dewatered to reduce the environmental impact caused by oil sands extraction. Polymer flocculants are commonly used to accelerate this process. In this work, we modified chitosan, a naturally occurring biopolymer, with 3-chloro-2-hydroxypropyltrimethylammonium chloride (Chito-CTA) and also grafted polyacrylamide to chitosan (Chito-g-PAM). We compared the dewatering performance of these two flocculants with that of a commercial cationic polyacrylamide (C-PAM). Chito-CTA and Chito-g-PAM dewatered tailings at rates of 18.27 and 20.72 m/h, respectively. The dewatering ability of Chito-CTA and Chito-g-PAM, measured in terms of capillary suction time (CST), was below 10 s, whereas the value for C-PAM was 82.3 s at optimum dosage. The turbidity of the supernatant obtained after flocculation with Chito-CTA or Chito-g-PAM was below 10 NTU, while C-PAM produced turbid supernatants. We studied the effect of flocculant microstructure on the specific resistance to filtration of the sediments. Chito-g-PAM produced sediments with the lowest resistance, 2.99 X 10(12) m/kg, while C-PAM's sediments had a much higher resistance of 40.26 X 10(12) m/kg. We also used the focused beam reflectance measurement technique to determine floc size evolution, floc stability, and time required to induce floc formation. Our results indicate that chitosan-based polymers may be successfully used to treat oil sands mature fine tailings.
机译：成熟的细尾矿需要进行脱水，以减少油砂开采对环境的影响。聚合物絮凝剂通常用于加速该过程。在这项工作中，我们用3-氯-2-羟丙基三甲基氯化铵（Chito-CTA）修饰了天然存在的生物聚合物壳聚糖，并将聚丙烯酰胺接枝到壳聚糖上（Chito-g-PAM）。我们将这两种絮凝剂与商用阳离子聚丙烯酰胺（C-PAM）的脱水性能进行了比较。 Chito-CTA和Chito-g-PAM尾矿脱水速率分别为18.27和20.72 m / h。以毛细管抽吸时间（CST）衡量，Chito-CTA和Chito-g-PAM的脱水能力低于10 s，而最佳剂量下C-PAM的脱水能力为82.3 s。用Chito-CTA或Chito-g-PAM絮凝后获得的上清液的浊度低于10 NTU，而C-PAM产生了混浊的上清液。我们研究了絮凝剂微观结构对沉积物过滤抗性的影响。 Chito-g-PAM产生的沉积物具有最低的抵抗力，为2.99 X 10（12）m / kg，而C-PAM的沉积物具有更高的抵抗力，为40.26 X 10（12）m / kg。我们还使用聚焦光束反射率测量技术来确定絮凝物的尺寸演变，絮凝物的稳定性以及诱导絮凝物形成所需的时间。我们的结果表明，基于壳聚糖的聚合物可以成功地用于处理油砂成熟的细尾矿。

著录项

  • 来源
    《Energy & fuels》 |2018年第4期|5271-5278|共8页
  • 作者

    de Oliveira Leonardo Pennetta; Gumfekar Sarang P.; Motta Fernanda Lopes; Soares Joao B. P.;

  • 作者单位

    Univ Alberta, Dept Chem & Mat Engn, 9211 116 St, Edmonton, AB T6G 1H9, Canada;

    Univ Alberta, Dept Chem & Mat Engn, 9211 116 St, Edmonton, AB T6G 1H9, Canada;

    Univ Alberta, Dept Chem & Mat Engn, 9211 116 St, Edmonton, AB T6G 1H9, Canada;

    Univ Alberta, Dept Chem & Mat Engn, 9211 116 St, Edmonton, AB T6G 1H9, Canada;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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