相关实验视频

Updated: Jul 23, 2025

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

在土壤中的垂直迁移Cr(VI) 和矿石加工残留物:现场采样和基板模拟

Xizhi Wang¹, Yuanyuan Liu¹, Bin Liu¹

¹Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400044, China; State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044, China.

Journal of hazardous materials

|July 16, 2023

概括

染色矿石加工残留物 (COPR) 随着时间的推移释放有毒的Cr (VI),污染土壤和地下水. 管理微型COPR颗粒对于有效的现场整治和防止进一步的环境破坏至关重要.

科学领域:

环境科学环境科学
地质化学地质化学
土壤科学土壤科学

背景情况:

矿加工残留物 (COPR) 是六价 (CrVI) 的持续来源.
由于长期释放CrVI,COPR污染给土壤和地下水的修复带来了重大挑战.
土壤中COPR的老化和气候变化导致复杂的矿物转化.

研究的目的:

研究Cr (VI) 和COPR颗粒在受污染的土壤中的垂直迁移.
了解COPR在模拟环境条件下的行为.
为COPR受污染的场所提供风险管理和整治策略的信息.

主要方法:

从一个历史污染地点收集COPR和土壤样本.
实验室模拟了Cr (VI) 和COPR粒子的垂直迁移.
在含有COPR的土壤中分析矿物学和颗粒大小分布.
在模拟降水下对Cr (VI) 出水的量化.

主要成果:

在老化的田间样本中发现了高度的Cr (VI) (数千毫克/公斤).
(VI) 很容易浸出并垂直迁移到土壤和地下水中.
土壤中的COPR形成了各种水合的棕米勒矿物质.
微细的COPR颗粒 (<5微米) 显示出显著的垂直迁移潜力.
模拟降水泄漏了大量的Cr (VI) 和调动了微细的COPR颗粒.

结论:

微细的COPR颗粒 (<5微米) 是垂直污染物运输的关键载体.
有效地管理微型COPR颗粒对于成功的整治至关重要.
了解粒子迁移对于评估和减轻COPR污染场所的风险至关重要.

关键词:

含有COPR的土壤可能含有COPR.六价的六价是一种棕色米勒矿石的水合矿物.微小的粒子微小的粒子

更多相关视频

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

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

相关概念视频

Volatilization

Volatilization

Volatilization gravimetry is an analytical technique that measures the mass lost due to the volatilization of the substance. This technique is used to estimate the amount of volatile material in a sample. To perform this method, heat a known amount of the sample to a high temperature in a crucible or other suitable vessel. The volatile substance in the sample evaporates, and the vapor is completely expelled from the crucible either by heating the sample or bubbling a stream of inert gas through...