相关实验视频

Updated: Jun 17, 2025

Author Spotlight: Standardizing the Development of Amine-Based Silica Composites as CO2 Adsorbents for Direct Air Capture

Author Spotlight: Standardizing the Development of Amine-Based Silica Composites as CO2 Adsorbents for Direct Air Capture

Published on: September 29, 2023

选择性捕获使用含胺的COF:一种新的策略,有效地改善土壤的修复

Feili Li¹, Cheng Chen¹, Hui Jin¹

¹College of Environment, Zhejiang University of Technology, Hangzhou 310032, PR China.

Journal of hazardous materials

|August 8, 2024

概括

一种新的胺基材料 (COF-TH) 能够有效地稳定污染土壤中的 (Pb). 这减少了植物修复期间的泄漏风险,改善了土壤和植物健康,使土地应用更安全.

科学领域:

环境科学环境科学
材料科学材料科学材料科学
土壤科学土壤科学

背景情况:

重金属污染泥土的植物修复在植物吸收之前面临漏风险.
具有成本效益的重金属稳定需要选择性吸附材料.

研究的目的:

合成和评估一种新的基于胺的共价有机框架 (COF-TH) 作为 (Pb) 的选择性稳定剂.
评估COF-TH在污泥土的植物修复过程中减轻Pb漏的有效性.

主要方法:

合成COF-TH,一种新的胺基共价有机框架.
在多金属溶液中对Pb的COF-TH选择性和吸附能力的评估.
实验和浸出试验,以确定Pb的减少以及对其他重金属和植物生长的影响.

主要成果:

COF-TH对Pb具有很高的选择性 (K_D = 3279 mL·g^{-1) 和 189 mg·g^{-1 的最大吸附能力.}}
COF-TH降低了77.8%的Pb液度,但没有显著影响其他重金属的植物提取.
吸附遵循兰格穆尔和粒子内部扩散模型,其动力学符合伪二阶模型.

结论:

COF-TH是Pb的高度选择性和有效的稳定剂,可以减轻污泥植物修复中的泄漏风险.
该材料有望改善土壤质量和植物健康,支持污泥的可持续土地应用.
本研究提出了一种综合方法,将植物疗法与重金属污染土壤的新型稳定技术相结合.

关键词:

基于胺基的COF是一种COF.泄漏的风险泄漏的风险 Pb Pb Pb Pb Pb Pb Pb Pb Pb Pb Pb Pb Pb Pb Pb Pb Pb Pb Pb Pb Pb Pb Pb Pb Pb 选择性吸附是一种选择性吸附.稳定剂稳定剂稳定剂

更多相关视频

Analysis of Organochlorine Pesticides in a Soil Sample by a Modified QuEChERS Approach Using Ammonium Formate

Analysis of Organochlorine Pesticides in a Soil Sample by a Modified QuEChERS Approach Using Ammonium Formate

Published on: January 20, 2023

Measuring Carbon-based Contaminant Mineralization Using Combined CO2 Flux and Radiocarbon Analyses

Measuring Carbon-based Contaminant Mineralization Using Combined CO2 Flux and Radiocarbon Analyses

Published on: October 21, 2016

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...