相关实验视频

Updated: Jul 4, 2025

Resource Recycling of Red Soil to Synthesize Fe2O3/FAU-type Zeolite Composite Material for Heavy Metal Removal

Resource Recycling of Red Soil to Synthesize Fe2O3/FAU-type Zeolite Composite Material for Heavy Metal Removal

Published on: June 2, 2022

污染土壤的修复:GLDA辅助提取和基于FeCl₃-CaO的顺序后稳定

Shengbin Ni¹, Shafiqur Rahman¹, Yasuhiro Harada¹

¹Graduate School of Natural Science and Technology, Kanazawa University, Kakuma, Kanazawa, 920-1192, Japan.

|February 2, 2024

概括

这项研究表明,生物降解化剂GLDA有效地从污染的土壤中去除 (Cd),性能与EDTA相比,但环境前景更好. 一种联合洗和稳定方法显著减少了剩余的Cd漏.

科学领域:

环境科学环境科学
土壤科学土壤科学
环境化学环境化学

背景情况:

农业土壤中的 (Cd) 污染对生态系统和人类健康构成重大风险.
传统的化剂,如EDTA,由于其持久性和毒性,引发了生态问题.
可生物降解的化剂为土壤整治提供了一个有希望的环保替代品.

研究的目的:

评估和比较可生物降解化剂 (GLDA,MGDA,HIDS) 与EDTA的疗效,以修复Cd污染的农业土壤.
为了优化处理参数,使用化剂辅助洗来最大限度地提取Cd.
评估处理后稳定过程在减少残留Cd漏方面的有效性.

主要方法:

使用GLDA,MGDA,HIDS和EDTA进行化剂辅助的土壤清洗.
洗参数的优化:化剂度,洗时间,pH值和液体与土壤的比率.
使用FeCl3和CaO处理后稳定洗净的土壤.

主要成果:

在GLDA的研究中,Cd的提取效率与EDTA相比较.
在优化条件下 (10 mmol L-1 GLDA,3 h,pH 3,L/S 10:1) 使用GLDA的Cd提取率高于EDTA.
处理后的稳定显著降低了土壤残留物中的水可溶性Cd.

结论:

GLDA是EDTA的有效和环保替代品,用于Cd污染土壤的修复.
结合化剂辅助洗和稳定策略为管理土壤提供了一种实际的方法.
这种修复方法可以有效地提取大量的Cd,并最大限度地减少剩余Cd的浸出.

关键词:

可生物降解的化剂污染污染污染治疗后的情况.土壤清洗土地清洗稳定化稳定化稳定化

更多相关视频

Two-way Valorization of Blast Furnace Slag: Synthesis of Precipitated Calcium Carbonate and Zeolitic Heavy Metal Adsorbent

Two-way Valorization of Blast Furnace Slag: Synthesis of Precipitated Calcium Carbonate and Zeolitic Heavy Metal Adsorbent

Published on: February 21, 2017

Detection and Recovery of Palladium, Gold and Cobalt Metals from the Urban Mine Using Novel Sensors/Adsorbents Designated with Nanoscale Wagon-wheel-shaped Pores

Detection and Recovery of Palladium, Gold and Cobalt Metals from the Urban Mine Using Novel Sensors/Adsorbents Designated with Nanoscale Wagon-wheel-shaped Pores

Published on: December 6, 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...

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.