相关实验视频

Updated: Mar 11, 2026

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

铁,和氧化物对土壤分布系数的影响:基于可解释的机器学习的多尺度分析

Yingdong Wu¹, Jiayi Li², Rong Teng³

¹Department of Environmental Science and Engineering, College of Architecture and Environment, Sichuan University, Chengdu 610065, PR China; Yibin Institute of Industrial Technology, Sichuan University, Yibin 644000, PR China.

Journal of hazardous materials

|March 9, 2026

概括

铁,和氧化物显著影响土壤中的 (Cd) 吸附. 了解这些金属氧化物和土壤因素对于有效的土壤整治策略至关重要,以固定Cd.

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:

土壤中的 (Cd) 流动性受矿物成分和环境条件的影响.
金属氧化物 (铁,,) 的特定作用及其在Cd吸附中的相互作用仍然不完全理解.

研究的目的:

量化铁,和氧化物对土壤中吸附的主要和相互作用的影响.
确定影响与土壤分离的关键环境因素.

主要方法:

编制了一个跨区域的土壤数据集.
开发了一个可解释的梯度增强模型 (XGBoost) 与SHAP归属.
量化了金属氧化物 (Fe_ox,Mn_ox,Al_ox),土壤pH,阴离子交换能力 (CEC) 和初始度 (C0) 对土壤-水分布系数 (lnKd) 的影响.

主要成果:

在XGBoost模型表现出良好的性能 (R2=0.737,RMSE=0.930).
影响Cd吸附的关键因素包括Fe_ox,Mn_ox,Al_ox,土壤pH,CEC和C0.
氧化物表现出一致的积极效应,铁氧化物表现出形的积极效应,氧化物普遍抑制了Cd吸附.
确定了Mn-Fe协同作用和Fe-Al对抗作用,通过pH,CEC和C0.0进行条件调制.

结论:

金属氧化物在控制土壤中的固定中发挥着至关重要的作用.
了解氧化物特性,网站可访问性和和度是预测Cd行为的关键.
结果为污染土壤的目标整治策略提供了信息.

关键词:

是的组成部分.分布系数分布系数环境相互作用环境相互作用金属氧化物 - 金属氧化物在XGBoost中使用.

更多相关视频

Dissolved Solute Sampling Across an Oxic-Anoxic Soil-Water Interface Using Microdialysis Profilers

Dissolved Solute Sampling Across an Oxic-Anoxic Soil-Water Interface Using Microdialysis Profilers

Published on: March 24, 2023

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

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...

Ladder Diagrams: Complexation Equilibria

Ladder Diagrams: Complexation Equilibria

Ladder diagrams are useful for evaluating equilibria involving metal-ligand complexes. The vertical scale of the ladder diagram represents the concentration of unreacted or free ligand, pL. The horizontal lines on the scale depict the log of stepwise formation constants for metal-ligand complexes and indicate the dominant species in all the regions.
The formation constant, K1, for the formation of Cd(NH3)2+ complex from cadmium and ammonia is 3.55 × 102. Log K1 (i.e. pNH3) is 2.55, and...

EDTA: Auxiliary Complexing Reagents

EDTA: Auxiliary Complexing Reagents

EDTA titrations are usually carried out in highly basic conditions, where the fully deprotonated form of EDTA, Y4−, actively complexes with the free metal ions in the solution. Several metal ions precipitate as hydrous oxide (hydroxides, oxides, or oxyhydroxides) under these conditions, lowering the concentration of free metal ions in the solution. For this reason, auxiliary complexing agents or ligands such as ammonia, tartrate, citrate, or triethanolamine are used in EDTA titrations to...