Abstract

A large volume of slag is generated as a by-product during steel manufacturing. In order to ensure environmental and economic sustainability, it is imperative to find innovative solutions for the efficient recycling of slag. This review broadly and critically explores the available information concerning the effective recycling of slag in agriculture and its potentials in crop yield, soil conditioning, greenhouse gas (GHG) emissions, soil carbon sequestration, and heavy metal stabilization in contaminated soils. An agronomic assessment of GHG emissions and environmental concerns related to potential contamination of heavy metals in the food chain have also been evaluated. Existing literatures documents a range of impacts that slag fertilization can be effective in increasing crop yield, mitigating GHG emissions, and decreasing yield-scaled global warming potential. Heavy metal accumulation in soil and their uptake by the plant are not consistent with the application of slag, mostly accumulated in roots, and very low translocation level in grains/fruits. In order to secure the reliability of recycling slag in agriculture, regulatory compliance related to environmental problems, novel technological solutions to improve the quality of slag, and strategic planning to expand its market value need great attention.

摘要

在钢铁制造过程中会产生大量的副产品渣。为了确保环境和经济的可持续性，必须找到创新的解决方案以有效地回收炉渣。这篇综述广泛而批判地探索了有关农业炉渣的有效回收及其在作物产量，土壤调节，温室气体（GHG）排放，土壤碳固存和被污染土壤中的重金属稳定化方面的潜力的可用信息。还评估了温室气体排放的农艺学评估以及与食物链中重金属的潜在污染有关的环境问题。现有文献记录了炉渣施肥可以有效提高作物产量，减少温室气体排放，并降低了单产规模的全球变暖潜力。重金属在土壤中的积累及其对植物的吸收与矿渣的施用不一致，矿渣主要在根部积累，而在谷物/水果中的转运水平非常低。为了确保农业废渣的可靠性，与环境问题相关的法规遵从，提高矿渣质量的新颖技术解决方案以及扩大其市场价值的战略规划都需要引起高度重视。