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Ports and river waterways dredging generates large volumes of sediment, and its dumping creates an environmental risk to the marine environment due to its potential contamination. An alternative to intensive dredging is to deposit the material on land for treatment before possible recovery, but regulations governing dredged sediments remain an obstacle to the development of recovery pathways. Similarly, the iron industry generates a huge amount of by-products (furnace slag), which are deposited in the production area. Furnace slag is generated from the smelting or refining of metals in a furnace. The slag consists primarily of silica, alumina, lime, and iron oxides, which are by-products of the reduction process. Furnace slag has significant potential as a resource in various sectors. Proper recycling and reuse can not only reduce the environmental impact of mining raw materials but also contribute to sustainable development practices. The concept of combining sediment with blast furnace slag to enhance electrokinetic remediation comes from the idea that the properties of slag can improve the electrokinetic process and increase its effectiveness. In addition, mixing two different waste materials to make a remediation process more efficient contributes to reducing by-products deposits and the beneficial use of dredged sediments. This article details the use of a sediment-slag mixture to enhance the electrokinetic remediation of a river sediment. Because of the low electrical properties of the river sediment, electrokinetic remediation was not efficient in comparison with marine sediment. A light proportion (5%) of mixed slags with sediment was tested using friendly environmental electrolytes. The results showed a large removal of metals (up to 70% and 90% for Zn and Cd, respectively) from the mixture, and a performance improved 4 to 5 times, advocating the advantage provided by furnace slag in electrokinetic remediation of low conductive sediments. The results support the concept of combining two waste materials to degrade pollutants in soil materials.

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Sustainable Remediation of Sediment Using Furnace Slag

  • 会议论文

  • 发表日期：

    2026年

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  • Ahmed Benamar,
  • Mohamed-Tahar Ammami,
  • Zulfiqar Ahmad,
  • Ahmad Zeineddin

摘要

Ports and river waterways dredging generates large volumes of sediment, and its dumping creates an environmental risk to the marine environment due to its potential contamination. An alternative to intensive dredging is to deposit the material on land for treatment before possible recovery, but regulations governing dredged sediments remain an obstacle to the development of recovery pathways. Similarly, the iron industry generates a huge amount of by-products (furnace slag), which are deposited in the production area. Furnace slag is generated from the smelting or refining of metals in a furnace. The slag consists primarily of silica, alumina, lime, and iron oxides, which are by-products of the reduction process. Furnace slag has significant potential as a resource in various sectors. Proper recycling and reuse can not only reduce the environmental impact of mining raw materials but also contribute to sustainable development practices. The concept of combining sediment with blast furnace slag to enhance electrokinetic remediation comes from the idea that the properties of slag can improve the electrokinetic process and increase its effectiveness. In addition, mixing two different waste materials to make a remediation process more efficient contributes to reducing by-products deposits and the beneficial use of dredged sediments. This article details the use of a sediment-slag mixture to enhance the electrokinetic remediation of a river sediment. Because of the low electrical properties of the river sediment, electrokinetic remediation was not efficient in comparison with marine sediment. A light proportion (5%) of mixed slags with sediment was tested using friendly environmental electrolytes. The results showed a large removal of metals (up to 70% and 90% for Zn and Cd, respectively) from the mixture, and a performance improved 4 to 5 times, advocating the advantage provided by furnace slag in electrokinetic remediation of low conductive sediments. The results support the concept of combining two waste materials to degrade pollutants in soil materials.