探索磷石膏的潜在再利用：废物还是资源？,Science of the Total Environment

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探索磷石膏的潜在再利用：废物还是资源？
Science of the Total Environment ( IF 8.2 ) Pub Date : 2023-11-03 , DOI: 10.1016/j.scitotenv.2023.168196
Fatima Akfas ₁ , Abdellatif Elghali ₁ , Abdelmaula Aboulaich ₁ , Manuel Munoz ₂ , Mostafa Benzaazoua ₁ , Jean-Louis Bodinier ₃

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磷石膏（PG）是磷肥工业的主要工业副产品，主要成分为二水硫酸钙。然而，它含有不同数量的各种杂质，具体取决于磷矿的来源。这些杂质会限制磷石膏作为二次初级资源的再利用。因此，大量生产的PG储存在地表库存中，占用大量土地，可能对周围环境造成重大生态污染风险。研究人员对解决全球范围内这种废料积累问题表现出越来越大的兴趣。为了全面了解磷石膏对环境的影响，探索其特性（例如化学、矿物学、放射性）以及它如何与周围环境相互作用至关重要，从而能够就其管理和增值做出明智的决策。在这篇综述中，我们将 i) 探索 PG 的化学、放射学和矿物学特征；ii) 讨论与陆地排放和海洋处置相关的环境问题；iii) 研究各种增值技术的最新进展，包括农业、稀土元素提取、环境应用、化学和热转换以及建筑行业。概述了它们的局限性和挑战，包括磷石膏（PG）的全球变异性、技术和经济限制以及选定的增值方法中二次污染的可能性。这需要进行彻底的评估并与传统的处置替代方案进行比较。

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Exploring the potential reuse of phosphogypsum: A waste or a resource?

Phosphogypsum (PG), the main industrial by-product of phosphate fertilizer industry, primarily consists of calcium sulfate dihydrate. However, it contains various impurities with variable quantities depending on the origin of the phosphate rock. These impurities can restrict the reuse of phosphogypsum as a secondary primary resource. Consequently, large quantities of produced PG are stored in surface stockpiles that occupy extensive land areas and may pose a significant risk of ecological contamination to the surroundings. Researchers have shown growing interest in addressing the worldwide accumulation of this waste material. To gain a comprehensive understanding of the environmental impact of phosphogypsum, it is crucial to explore its properties (e.g., chemistry, mineralogy, radioactivity), and how it interacts with the surrounding environment, enabling well-informed decisions decision regarding its management and its valorization. In this review, we will i) explore the chemical, radiological and mineralogical characteristics of PG; ii) discuss the environmental concerns related to land discharge and sea disposal; and iii) examine the latest advancements in various valorization techniques developed including agriculture, REE extraction, environmental application, chemical and thermal transformation, and also construction sector. Outlining their limitations and challenges restrict in the global variability of phosphogypsum (PG), technical and economic limitations, and the potential for secondary pollution in select valorization approaches. This requires a thorough assessment and comparison with conventional disposal alternatives.

更新日期：2023-11-03

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