相关实验视频

Updated: Jun 12, 2025

Two-Dimensional Visualization and Quantification of Labile, Inorganic Plant Nutrients and Contaminants in Soil

Two-Dimensional Visualization and Quantification of Labile, Inorganic Plant Nutrients and Contaminants in Soil

Published on: September 1, 2020

农业土壤中Cd和Pb的不同可提取池在修改中:水溶性度灵敏地表明金属的可用性

Zidi Wang¹, Wenyao Tang¹, Xiaodong Ding²

¹Institute of Environment and Health, Jianghan University, Wuhan 430056, China; Laboratory of Environmental Nanotechnology and Health Effect, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.

Journal of environmental sciences (China)

|September 21, 2024

概括

水的提取有效地评估了土壤中的和的可用性,与BCR或Ca (NO3) 2方法不同. 这种方法有助于评估重金属的环境风险和修复策略.

科学领域:

环境化学环境化学
土壤科学土壤科学
地质化学地质化学

背景情况:

准确评估 (Cd) 和 (Pb) 的可用性对于环境风险评估和补救有效性至关重要.
目前用于Cd和Pb评估的化学提取池尚未完全理解,这阻碍了可靠的土壤分析.

研究的目的:

评估欧洲共同体参考局 (BCR) 序列提取,Ca(NO3) 2提取和水提取的可行性,以评估Cd和Pb的可用性.
通过同位素追踪,研究新引入的Cd和Pb在经过修改的农业土壤中的老化过程.

主要方法:

用石灰,氧化物,生物炭和二酸盐修改的农田土壤上的BCR,Ca(NO3) 2和提水方法的比较.
富化同位素追踪 (112Cd和206Pb) 用于监测金属在56天化时间内的老化.

主要成果:

BCR和Ca(NO3) 2提取结果显示,修改的影响很小,与土壤pH的相关性很弱.
水的提取显示出修改的明显影响和与土壤pH的强烈负相关性 (r: -0.908到-0.825,P <0.001).
新引入的Cd和Pb表现出显著的老化,可在酸溶和水溶分数中观察到.

结论:

与BCR和Ca (NO3) 2方法相比,提取水是评估Cd和Pb可用性的更敏感和更可靠的方法.
土壤的变化对水溶性金属度有很大影响,需要对植物潜在的吸收保持谨慎.
这些发现支持提取水作为指导环境风险评估和制定重金属修复策略的有希望的方法.

关键词:

丰富的稳定同位素丰富的稳定同位素重金属是一种重金属.顺序提取顺序提取顺序提取土壤的修改土壤的修改土壤的pH值是什么在水中溶解的度.

更多相关视频

Measuring Phosphorus Release in Laboratory Microcosms for Water Quality Assessment

Measuring Phosphorus Release in Laboratory Microcosms for Water Quality Assessment

Published on: July 22, 2019

Quantification of Heavy Metals and Other Inorganic Contaminants on the Productivity of Microalgae

Quantification of Heavy Metals and Other Inorganic Contaminants on the Productivity of Microalgae

Published on: July 10, 2015

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...