Scholarlink

<p>Aluminum (Al) salts are commonly used in conventional water facilities as primary coagulants. However, the coagulation process generates massive amounts of aluminum-based waste material, known as alum sludge or <i>“Al-Sludge”</i>, which requires proper treatment before disposal. This study introduces an innovative ferrite conditioner composed of a blend of zinc-silver (Zn-Ag) ferrite (Zn<sub>0.5</sub>Ag<sub>0.5</sub>Fe<sub>2</sub>O<sub>4</sub>), prepared through a simple co-precipitation method with a viable yield. The prepared Zn-Ag ferrite conditioner (ZSF-Conditioner) was applied as a modified Fenton conditioner and characterized using X-ray diffraction (XRD), transmission electron microscopy (TEM), and scanning electron microscopy (SEM). In addition, the thermal behavior of the material was analyzed using thermogravimetry (TG) and thermogravimetric analysis (TGA). The ZSF-Conditioner utilizes oxidative radicals to dismantle extracellular <i>Al-Sludge</i> and improves sludge dewaterability. The capillary suction time (CST) of the <i>Al-Sludge</i> before and after treatment revealed the effectiveness of the Fenton process. For accurate optimization of the system variables, response surface methodology (RSM) was applied based on a Box-Behnken experimental design. The optimal values for ZSF-Conditioner, hydrogen peroxide (H<sub>2</sub>O<sub>2</sub>), and pH were determined to be 43 mg L<sup>− 1</sup>, 430 mg L<sup>− 1</sup>, and 3.5, respectively, achieving a CST reduction efficacy of 74 ± 3%, which was consistent with the predicted efficiency from the polynomial model. Thus, the experimental data confirmed the effectiveness of the system for <i>Al-Sludge</i> conditioning, highlighting its notable implementation and safe technology.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Opportunities of aluminum sludge dredging with soft magnetic conditioner for dewaterability enrichment

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年3月6日

查看全文
  • Manasik M. Nour,
  • Maha A. Tony,
  • Woo Hyoung Lee,
  • Hossam A. Nabwey

摘要

Aluminum (Al) salts are commonly used in conventional water facilities as primary coagulants. However, the coagulation process generates massive amounts of aluminum-based waste material, known as alum sludge or “Al-Sludge”, which requires proper treatment before disposal. This study introduces an innovative ferrite conditioner composed of a blend of zinc-silver (Zn-Ag) ferrite (Zn0.5Ag0.5Fe2O4), prepared through a simple co-precipitation method with a viable yield. The prepared Zn-Ag ferrite conditioner (ZSF-Conditioner) was applied as a modified Fenton conditioner and characterized using X-ray diffraction (XRD), transmission electron microscopy (TEM), and scanning electron microscopy (SEM). In addition, the thermal behavior of the material was analyzed using thermogravimetry (TG) and thermogravimetric analysis (TGA). The ZSF-Conditioner utilizes oxidative radicals to dismantle extracellular Al-Sludge and improves sludge dewaterability. The capillary suction time (CST) of the Al-Sludge before and after treatment revealed the effectiveness of the Fenton process. For accurate optimization of the system variables, response surface methodology (RSM) was applied based on a Box-Behnken experimental design. The optimal values for ZSF-Conditioner, hydrogen peroxide (H2O2), and pH were determined to be 43 mg L− 1, 430 mg L− 1, and 3.5, respectively, achieving a CST reduction efficacy of 74 ± 3%, which was consistent with the predicted efficiency from the polynomial model. Thus, the experimental data confirmed the effectiveness of the system for Al-Sludge conditioning, highlighting its notable implementation and safe technology.