快速回收的生态纳米解决方案:关闭可持续农业的循环
Atif Muhmood1, Shihao Cui2, Jingyu Wang2
1Department of Agroecology, Aarhus University, Blichers Alle 20, 8830 Tjele, Denmark; Institute of Soil Chemistry and Environmental Sciences, AARI, Faisalabad, Pakistan.
The Science of the total environment
|January 21, 2025
概括
绿色合成的纳米粒子在几分钟内有效地从农业用水中去除 (P). 这些具有成本效益的纳米粒子具有高吸附能力和可重复使用性,为P.管理提供了可持续的解决方案.
科学领域:
- 环境科学 环境科学
- 材料科学 材料科学 材料科学
- 绿色化学 绿色化学
背景情况:
- 从农业排水中去除 (P) 对经济可行性和运营可行性至关重要.
- 开发具有成本效益和可持续的P管理方法是一个关键的环境挑战.
研究的目的:
- 为了评估绿色合成纳米颗粒的有效性,使用草提取物进行快速和高效的吸附.
- 评估这些纳米粒子在各种实验条件下的性能,并将它们与化学合成吸附剂进行比较.
主要方法:
- 进行了批量实验,以调查pH值,初始P度,吸附剂剂量,接触时间和温度的影响.
- 分析了纳米粒子特性 (大小) 和它们对吸附动力学的影响.
- 使用吸附建模来了解潜在的吸附机制 (物理吸附和化学吸附).
- 进行了再生研究,以评估纳米颗粒的可重复使用性.
主要成果:
- 绿色合成的纳米粒子表现出快速的P去除,仅在5分钟内吸附20mg/L的P.
- 达到77.5mg/g的最大吸附能力,超过了化学合成的吸附剂.
- 吸附动力学受到颗粒大小的影响,较小的颗粒显示出更快的初始吸附,较大的颗粒随着时间的推移贡献更多.
- 物理吸收主导了最初的吸附,而化学吸收则控制了后来的阶段.
- 纳米颗粒在5个再生周期后保留了50%以上的吸附能力,这表明它们具有显著的可重复使用性.
结论:
- 绿色合成的纳米颗粒为快速从农业排水中去除提供了具有成本效益和高效的解决方案.
- 该研究强调了这些纳米粒子在可持续P管理方面的潜力,具有强大的可重复使用性和高吸附能力.
- 建议在动态农业排水系统中进行进一步的优化.
更多相关视频
08:21Optimized Procedure for Determining the Adsorption of Phosphonates onto Granular Ferric Hydroxide using a Miniaturized Phosphorus Determination Method
Published on: May 18, 2018
14.5K
08:58High-Throughput Measurement and Classification of Organic P in Environmental Samples
Published on: June 8, 2011
12.9K
相关概念视频
01:21The Phosphorus Cycle
36.4K
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.
36.4K
00:46Bioremediation
18.2K
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.
18.2K
02:35Key Elements for Plant Nutrition
18.6K
Like all living organisms, plants require organic and inorganic nutrients to survive, reproduce, grow and maintain homeostasis. To identify nutrients that are essential for plant functioning, researchers have leveraged a technique called hydroponics. In hydroponic culture systems, plants are grown—without soil—in water-based solutions containing nutrients. At least 17 nutrients have been identified as essential elements required by plants. Plants acquire these elements from the...
18.6K