用尽的灭火粉：无土栽培堆肥富集再利用和增值的潜在矿质营养来源,Science of the Total Environment

当前位置： X-MOL 学术 › Sci. Total Environ. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

用尽的灭火粉：无土栽培堆肥富集再利用和增值的潜在矿质营养来源
Science of the Total Environment ( IF 8.2 ) Pub Date : 2023-10-06 , DOI: 10.1016/j.scitotenv.2023.167633
Antonio Gelsomino ₁ , Beatrix Petrovičovà ₁ , Maria Rosaria Panuccio ₁

Affiliation

灭火粉 (FEP) 由 (NH)HPO 和 (NH)SO 盐（按重量计>95%）的内部矿物核心构成，外部涂有硅基添加剂，这在其使用寿命结束后难以重复使用。已过期（36 个月）。本研究旨在评估使用堆肥过程作为一种环境友好策略来溶解外部涂层并回收这种营养丰富的固体废物以替代园艺作物无土栽培中的无机肥料的可行性。使用在受控条件下将生菜植物种植在土壤/石英砂混合物中 28 天的微观尺度实验来研究植物对随着增加的修正的反应（新鲜和干燥生物量、叶绿素荧光参数、根形态、灰分和养分含量）。富含 FEP 的耗尽堆肥的剂量（相当于 0、10、20 和 30 吨公顷）。还监测释放到生长基质中的化学性质（pH、EC、TOC、TN）和可溶性营养物质（Na、K、Mg、Ca、NH、H3PO、SO、NO、Cl）的含量。将未改良的微观世界和未富集的堆肥处理作为对照。结果显示，除了预期的磷酸盐、硫酸盐和铵离子增加外，耗尽的 FEP 还贡献了 Ca、Mg 和 Na 含量。而堆肥决定了钾的剂量依赖性释放，这对于将钾/钠比率维持在对植物生理无害的范围内特别有用。研究还发现，富含 5%（/w）废 FEP 的堆肥对生菜没有植物毒性。相反，它刺激植物生长，提高光合效率和地上部生物量积累，从而增加地上部/根的比例。此外，它还引导根系形态发育并促进植物对水和溶质的吸收。总而言之，堆肥是化学处理的合适替代方案，可回收耗尽的 FEP 中含有的现成养分，并产生用于无土栽培的富集堆肥。

"点击查看英文标题和摘要"

Exhausted fire-extinguishing powders: A potential source of mineral nutrients for reuse and valorisation in compost enrichment for soilless cultivation

Fire-extinguishing powders (FEPs) are constituted by an inner mineral core of (NH)HPO and (NH)SO salts (>95 %, by weight) externally coated with Si-based additives, which make problematic reuse after their service life has expired (36 months). This study aimed to assess the feasibility of using the composting process as an environmentally friendly strategy to lyse the external coating and recycle this nutrient-rich solid waste for replacement of inorganic fertilization in soilless cultivation of horticultural crops. A microcosm-scale experiment with lettuce plants grown into a soil/quartz sand mixture under controlled conditions for 28 days was used to investigate plant responses (fresh and dry biomass, chlorophyll fluorescence parameters, root morphology, ash and nutrients content) to amendment with increasing dosages (equivalent at 0, 10, 20 and 30 t ha) of an exhausted FEPs-enriched compost. Chemical properties (pH, EC, TOC, TN) and content of soluble nutrients (Na, K, Mg, Ca, NH, HPO, SO, NO, Cl) released into the growing substrate were also monitored. Non-amended microcosms and non-enriched compost treatments were taken as controls. Results showed, beside the expected rise of phosphate, sulphate and ammonium ions, exhausted FEPs contributed Ca, Mg and Na content. Whereas compost determined a dose-dependent release of K, which was particularly useful in maintaining the K/Na ratio in a range not harmful to plant physiology. It was also found that the compost enriched with 5 % (/w) exhausted FEPs was no phytotoxic to lettuce. On the contrary, it stimulated the plant growth, increased the photosynthetic efficiency and the shoot biomass accumulation, thus incrementing the shoot/root ratio. Moreover, it oriented the root morphology development and promoted the plant uptake of both water and solutes. To sum up, composting represents a suitable alternative to chemical treatment to recover readily available nutrients contained in exhausted FEPs and produce an enriched compost for use in soilless cultivation.

更新日期：2023-10-06

点击分享查看原文

点击收藏

公开下载

阅读更多本刊最新论文本刊介绍/投稿指南

全部期刊列表>>