Brazil faces urgent environmental challenges due to large waste production from mining and construction activities particularly regarding the disposal and management of the solid waste generated by these activities. The extraction of iron ore and the storage of tailings in dams, most of which are at imminent risk of rupture, represent foretold environmental disasters. Additionally, the disposal of construction waste raises environmental concerns due to the decreasing vailability of inert landfill space. To address these challenges, we evaluated the potential of Technosols made from construction and demolition waste (CDW) and iron mining tailing (IMT) in different proportions (60:40, 70:30, 80:20, and 100% of IMT and CDW, respectively) to support grass development. The Technosols were compared to a natural soil (Haplic Ferralsol). The soils were cultivated with Urochloa brizantha cv. Marandu in a field experiment conducted for 120 days. At the end of experiment, soil samples were collected and analyzed their chemical, physical, and mineralogical attributes, while plants were analyzed for dry biomass. Plants cultivated in Technosols exhibited dry biomass production 3.3‐fold (825 ± 270 g) greater than those cultivated in the natural soil (251 ± 77 g). Higher biomass production in the Technosols, especially in the TEC70:30, was associated with the favorable chemical conditions of these soils, such as slightly neutral pH (~7.5), higher cation exchange capacity (68.1 ± 12.4 mmol dm−3) and nutrient availability, especially Ca and P (57.8 ± 0.8 and 28.2 ± 0.4 mmol dm−3, respectively). These results aim to provide insights for the effective use of different Technosols in mitigating environmental impacts and promoting sustainable land and waste management practices, primarily to prevent future environmental disasters.

中文翻译：

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由铁矿尾矿和建筑和拆除废料制成的 Technosols 作为可持续固体废物管理的替代品


由于采矿和建筑活动会产生大量废物，巴西面临着紧迫的环境挑战，尤其是在这些活动产生的固体废物的处置和管理方面。铁矿石的开采和尾矿在大坝中的储存，其中大部分都面临迫在眉睫的破裂风险，预示着环境灾难。此外，由于惰性垃圾填埋场空间的可用性降低，建筑垃圾的处理引发了环境问题。为了应对这些挑战，我们评估了由建筑和拆除废料 （CDW） 和铁矿尾矿 （IMT） 制成的 Technosols 在不同比例（分别为 IMT 和 CDW 的 60：40、70：30、80：20 和 100%）支持草地生长方面的潜力。将 Technosols 与天然土壤 （Haplic Ferralsol） 进行比较。土壤是用 Urochloa brizantha cv 耕作的。Marandu 在进行了 120 天的现场实验中。在实验结束时，收集土壤样品并分析其化学、物理和矿物学属性，同时分析植物的干燥生物量。在 Technosols 中种植的植物的干燥生物量产量是天然土壤中种植的植物（251 ± 77 克）的 3.3 倍（825 ± 270 克）。Technosols 中较高的生物量产量，尤其是在 TEC70：30 中，与这些土壤有利的化学条件有关，例如微中性 pH 值 （~7.5）、较高的阳离子交换能力 （68.1 ± 12.4 mmol dm-3） 和养分可用性，尤其是 Ca 和 P（分别为 57.8 ± 0.8 和 28.2 ± 0.4 mmol dm-3）。 这些结果旨在为有效使用不同 Technosols 来减轻环境影响和促进可持续的土地和废物管理实践提供见解，主要是为了防止未来的环境灾难。