...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>The HKIE Transactions >Utilisation of incinerated sewage sludge ash as a matrix for cadmium stabilisation
【24h】

Utilisation of incinerated sewage sludge ash as a matrix for cadmium stabilisation

机译：焚烧污水污泥灰作为镉稳定基质的利用

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

This study investigates the feasibility of beneficially using two types of incinerated sewage sludge ash (ISSA) for cadmium stabilisation. The sewage sludge samples were collected from a secondary sewage treatment work (SSTW) and a chemically-enhanced primary sewage treatment works (CEPSTW). Prior to the cadmium immobilisation process, the collected sludge was pretreated at 900°C for 30 minutes. Both X-ray fluorescence (XRF) and X-ray diffraction (XRD) were employed to determine the elemental compositions and mineral phases of the ISSA. The results show that the ISSA contained a considerable amount of Si, Al and Fe, etc., offering the possibility to reuse the ISSA for the treatment of cadmium. To immobilise cadmium, cadmium oxide (CdO) was alternatively mixed with the ISSA with different molar ratios of Cd/Si. With a 950°C/3 hour treatment, cadmium was successfully incorporated into the Cd-Al-Si phase, the Cd-Si phase(s) and the Cd-Fe spinel. These product phases have high acid resistances, as revealed by a constant-pH leaching test (CPLT). The formation of the Cd-Al-Si phase, the Cd-Si phase(s) and the Cd-Fe spinel are highly influenced by the amount of cadmium presents in the treatment system. The success of utilising ISSA for cadmium stabilisation may provide a promising avenue for the sustainable management of the ISSA as well as the waste containing heavy metals.
机译：本研究调查了利用两种焚烧污水污泥灰（ISSA）的可靠性来调查用于镉稳定化的可行性。从二级污水处理工作（SSTW）和化学增强的主要污水处理工程（CEPSTW）收集污水污泥样品。在固定过程中，收集的污泥在900℃下预处理30分钟。使用X射线荧光（XRF）和X射线衍射（XRD）来确定ISSA的元素组合物和矿物相。结果表明，ISSA包含了相当数量的Si，Al和Fe等，提供了重用ISSA治疗镉的可能性。为了固定镉，氧化镉（CDO）与具有不同CD / Si的摩尔比的ISSA混合。用950℃/ 3小时处理，成功掺入CD-Al-Si相，CD-Si相和CD-Fe尖晶石中。这些产物阶段具有高耐酸性，如恒定-PH浸出试验（CPLT）所揭示的。 CD-Al-Si相，CD-Si相和CD-Fe尖晶石的形成受到治疗系统中镉呈级别的高度影响。利用镉稳定的依据的成功可以为可持续管理的可持续管理以及含重金属的废物提供有希望的大道。

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