相关实验视频

Updated: Jun 26, 2025

A Method to Preserve Wetland Roots and Rhizospheres for Elemental Imaging

A Method to Preserve Wetland Roots and Rhizospheres for Elemental Imaging

Published on: February 15, 2021

和的可用性及其在米种植区的去除

Marco E Mng'ong'o¹, Frank Stephano Mabagala²

¹Mbeya University of Science and Technology, P.O. Box 131, Mbeya, Tanzania.

Journal of environmental management

|May 19, 2024

概括

铁,,和基材料有效地减少了米粒中的有毒和. 铁基材料在提高水农业的食品安全方面表现最有前途.

科学领域:

环境科学环境科学
农业科学农业科学
食品科学食品科学食品科学

背景情况:

(As) 和 (Cd) 在大米中的积累构成了全球粮食安全和安全风险.
这些有毒元素通过农业生态系统的消费对公众健康构成危险.
关于有效降低米粒中As和Cd的材料存在有限的文档.

研究的目的:

系统地审查使用合成和改性材料在米种植中减少As和Cd的效率和机制.
解决关于大米粒中As和Cd去除的物质贡献的知识差距.
了解各种材料在农业生态系统中减轻As和Cd污染的潜力.

主要方法:

从主要科学数据库收集和分析了2010年至2024年间发表的同行评审文章.
对详细研究的研究进行了集中分析,这些研究详细介绍了在水养殖中减少和去除As和Cd的情况.
重新分析收集的数据以确定标准化平均差异 (SMD) 以95%的置信区间 (CI).

主要成果:

分析了96项研究,包括228项涉及铁 (Fe), (Ca), (Si) 和 (Se) 基材料的观察结果.
应用Fe,Ca,Si和Se基材料在不同研究地点的米粒中显著降低了As和Cd.
与其他研究材料相比,基于Fe的材料在减少As和Cd方面表现出更高的效率.

结论:

铁,Ca,Si和Se改性材料显示出在米种植和大米谷物中减少As和Cd可用性的巨大潜力.
提高农民对这些材料的可访问性和可用性对于减轻污染至关重要.
需要进一步研究这些材料的联合应用及其对作物生产率和土壤健康的影响.

关键词:

亚是一种.生物可用性生物可用性是的组成部分.固定化固定化固定化这里是大米土壤.

更多相关视频

An Anaerobic Biosensor Assay for the Detection of Mercury and Cadmium

An Anaerobic Biosensor Assay for the Detection of Mercury and Cadmium

Published on: December 17, 2018

Determination of Inorganic Arsenic in a Wide Range of Food Matrices using Hydride Generation - Atomic Absorption Spectrometry.

Determination of Inorganic Arsenic in a Wide Range of Food Matrices using Hydride Generation - Atomic Absorption Spectrometry.

Published on: September 1, 2017

相关概念视频

Extraction: Advanced Methods

Extraction: Advanced Methods

Metal ions can be separated from one another by complexation with organic ligands–the chelating agent– to form uncharged chelates. Here, the chelating agent must contain hydrophobic groups and behave as a weak acid, losing a proton to bind with the metal. Since most organic ligands used in this process are insoluble or undergo oxidation in the aqueous phase, the chelating agent is initially added to the organic phase and extracted into the aqueous phase. The metal-ligand complex is...

Precipitation and Co-precipitation

Precipitation and Co-precipitation

Precipitation and coprecipitation methods can be used to separate a mixture of ions in a solution. In qualitative inorganic analysis, ions that form sparingly soluble precipitates with the same reagent are separated based on the differences in solubility products. For example, consider the separation of Cu(II) and Fe(II) ions by precipitation as insoluble sulfides. First, copper(II) sulfide is precipitated by the addition of acidic H2S, where the dissociation of H2S is suppressed. Adding H2S...

Bioremediation

Bioremediation

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.

The Phosphorus Cycle

The Phosphorus Cycle

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.