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Copper recovery from wastewater using an electrochemical rotating barrel reactor.

机译：使用电化学旋转桶式反应器从废水中回收铜。

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摘要

Environmental pollution is a major problem facing us today. The rapid growth and the applications of advanced production technology resulted in high metal contaminants in wastewater streams. This study is concerned with removing toxic heavy metal ions (copper ions) from industrial wastewater prior to its discharge to the waste streams.; In this project, copper ion concentration in a wastewater was reduced from one hundred parts per million (ppm) to less than one part per million and the copper ions were recovered in their metallic form by electrodeposition at the cathode of an electrochemical cell. An oblique rotating barrel, which was partially filled with copper raschig rings, was used as the cathode. The rotating barrel offers a high mass transfer rate and a large cathode surface area for copper electrodeposition.; This thesis presents the experimental measurements of the apparent reaction rate constant of copper deposition reaction at different operation variables. These variables include; cell voltage, barrel rotation speed, percent barrel loading, percent barrel immersion, barrel tilt angle, and anode surface area. The experimental results showed that rate of copper deposition reaction inside the rotating barrel was mass transfer and kinetically controlled. With an operating cell voltage of 2.5 to 5.0 V, the overall current efficiency for copper recovery was 20 to 53%, and the electric energy requirement was in the range of 4 to 21 kWh per kilogram of copper recovered from the wastewater. These results indicate that the present electrolytic process is economically feasible for large scale industrial wastewater treatment operations.
机译：环境污染是当今我们面临的主要问题。快速增长和先进生产技术的应用导致废水流中的高金属污染物。这项研究涉及在将工业废水排放到废水中之前，从工业废水中去除有毒的重金属离子（铜离子）。在该项目中，废水中的铜离子浓度从百万分之一（ppm）降至百万分之一以下，并且通过在电化学电池的阴极进行电沉积以金属形式回收了铜离子。将部分装有铜拉西环的倾斜旋转镜筒用作阴极。旋转筒为铜电沉积提供了较高的传质速率和较大的阴极表面积。本文提出了铜在不同操作变量下的表观反应速率常数的实验测量。这些变量包括：电池电压，料筒转速，料筒负载百分比，料筒浸入百分比，料筒倾斜角和阳极表面积。实验结果表明，旋转筒内的铜沉积反应速率是传质且受动力学控制的。在2.5至5.0 V的工作电池电压下，铜回收的总电流效率为20至53％，每千克废水中回收的铜所需的电能为4至21 kWh。这些结果表明，对于大规模工业废水处理操作，本电解方法在经济上是可行的。

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  • 作者

    Al-Shammari, Abdallah A.;

  • 作者单位

    King Fahd University of Petroleum and Minerals (Saudi Arabia).;

  • 授予单位 King Fahd University of Petroleum and Minerals (Saudi Arabia).;
  • 学科 Engineering Chemical.
  • 学位 M.S.
  • 年度 2002
  • 页码 134 p.
  • 总页数 134
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化工过程（物理过程及物理化学过程）;
  • 关键词

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