从农业废物中通过仙人掌梨生物质回收
Nicolò Auteri1, Riccardo Scalenghe1, Filippo Saiano1
1Dipartimento Scienze Agrarie, Alimentari e Forestali, Università degli Studi di Palermo, Italy.
Heliyon
|October 9, 2023
概括
石梨修剪废物 (CPPW) 通过或铁丰富有效地从水中去除. 这种低成本的生物质为回收和农业再利用提供了可持续的解决方案.
科学领域:
- 环境科学 环境科学
- 农业化学 农业化学
- 材料科学 材料科学 材料科学
背景情况:
- 从水溶液中去除 (P) 对环境保护和资源回收至关重要.
- 石梨修剪废物 (CPPW) 是一个未充分利用的生物质资源,具有潜在的吸附性质.
- 用 (Ca) 或铁 (Fe) 丰富可以提高生物质材料的P吸附能力.
研究的目的:
- 调查仙人掌梨修剪废物 (CPPW) 作为去除 (P) 的低成本吸附剂的有效性.
- 评估 (Ca) 和铁 (Fe) 丰富的CPPW的P去除性能.
- 为了确定修改后的CPPW的吸附机制,动力学和再生潜力.
主要方法:
- 批量吸附实验使用CPPW修改了Ca2+,Fe2+和Fe3+离子进行.
- 吸附等热体 (Langmuir, Freundlich等等) 是一个 和动力模型 (伪一阶,伪二阶,粒子内部扩散) 应用.
- 进行了溶解和再生研究,以评估吸附剂的稳定性和可重复使用性.
主要成果:
- 富含Ca2+的CPPW的P去除能力为2.27 mg g-1,富含Fe2+的CPPW为1.33 mg g-1,富含Fe3+的CPPW为1.87 mg g-1.
- 兰慕尔异热模型最好地描述了P吸附过程.
- 伪二次运动模型准确地表示了吸附率,最小的P脱吸 (<8%) 表明了强大的吸附稳定性.
结论:
- 富含Ca或Fe的CPPW是一种具有成本效益和高效的吸附剂,用于从水溶液中去除.
- 生物质化-P系统的强稳定性表明,它有可能作为土壤调节剂和肥料直接用于农业.
- 这种方法为农业中回收和营养管理提供了一种可持续且经济可行的方法.
相关概念视频
The Phosphorus Cycle
37.3K
Unlike carbon, water, and nitrogen, phosphorus is not present in the atmosphere as a gas. Instead, most phosphorus in the ecosystem exists as compounds, such as phosphate ions (PO43-), found in soil, water, sediment and rocks. Phosphorus is often a limiting nutrient (i.e., in short supply). Consequently, phosphorus is added to most agricultural fertilizers, which can cause environmental problems related to runoff in aquatic ecosystems.
37.3K
Bioremediation
18.7K
Bioremediation is the use of prokaryotes, fungi, or plants to remove pollutants from the environment. This process has been used to remove harmful toxins in groundwater as a byproduct of agricultural run-off and also to clean up oil spills.
18.7K
C4 Pathway and CAM
45.6K
Most plants use the C3 pathway for carbon fixation. However, some plants, such as sugar cane, corn, and cacti that grow in hot conditions, use alternative pathways to fix carbon and conserve energy loss due to photorespiration. Photorespiration is the process that occurs when the oxygen concentration is high. Under such conditions, the rubisco enzyme in the Calvin cycle binds O2 instead of CO2, which halts photosynthesis and consumes energy.
C4 Pathway
The C4 pathway is used by plants such as...
C4 Pathway
The C4 pathway is used by plants such as...
45.6K


