60 Cladophora rupestris生物质功能组的Coγ激活及其对Pb2+吸附的影响
Lu-Sheng Zhang1, Zhao-Wen Liu1,2, Chang-Fa Qiu1
1Anhui Province Key Laboratory of Farmland Ecological Conservation and Pollution Prevention, School of Resources and Environment, Anhui Agricultural University, Hefei, 230036, People's Republic of China.
Environmental science and pollution research international
|December 25, 2024
概括
马辐射通过改变其表面结构和化学物质,显著增强了Cladophora rupestris生物质的 (Pb2+) 吸附. 这种修改增加了吸附能力,为从水中去除重金属提供了一种新方法.
科学领域:
- 环境科学 环境科学
- 材料科学 材料科学 材料科学
- 放射化学 放射化学是指辐射化学.
背景情况:
- 重金属污染,特别是 (Pb2+),对水生生态系统和人类健康构成重大威胁.
- 基于生物质的吸附剂为重金属修复提供了可持续和经济有效的解决方案.
- 修改生物质特性可以提高其对目标污染物的吸附效率.
研究的目的:
- 调查马辐射 (Coγ-ray) 对Cladophora rupestris (C. rupestris) 生物质的Pb2+吸附能力的影响.
- 阐明C. rupestris辐射后生物质表面结构,化学特性和吸附机制的变化.
- 评估玛辐射C. rupestris生物质作为Pb2+去除的增强吸附剂的潜力.
主要方法:
- 在C. rupestris的生物量中,不同剂量的Coγ-ray辐射.
- 使用先进的技术分析了表面特征,界面化学和孔隙结构.
- 进行了Pb2+吸附实验,以确定吸附能力和机制.
- 研究了功能组和元素组成的变化.
主要成果:
- 马辐射显著改变了C. rupestris生物质的表面特征和界面化学.
- 辐射导致了特定表面积和毛孔结构的增加,使Pb2+的吸附能力提高了2.6-2.9倍.
- -射线辐射导致蛋白质成分的优先降解,通过去胺化增加了阴离子吸收部位.
- 观察到含碳和含氧功能组的变化,改善了Pb2+吸附.
结论:
- 射辐射有效地激活了C. rupestris生物质中的功能组,创造了更多的Pb2+吸附点.
- 玛辐射的C. rupestris生物质显示出显著增强的Pb2+去除能力.
- 这项研究提出了一种用于修改生物质材料的新方法,以改善水体中的重金属修复.
相关概念视频
Extraction: Advanced Methods
415
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...
415
Colloidal precipitates
507
The high insolubility of some precipitates can result in an unfavorable relative supersaturation. This can lead to colloidal particles with a large surface-to-mass ratio, where adsorption is promoted. For instance, in the precipitation of silver chloride, silver ions are adsorbed on the surface of the colloidal particles, forming a primary layer. This layer attracts ions of opposite charge (such as nitrate ions), forming a diffuse secondary layer of adsorbed ions. This electric double layer...
507
Voltammetry: Stripping Methods
175
Anodic Stripping Voltammetry (ASV), Cathodic Stripping Voltammetry (CSV), and Adsorptive Stripping Voltammetry (AdSV) are electrochemical techniques used to determine trace amounts of analytes in solution. These methods involve applying a potential to an electrode and measuring the resulting current.
Anodic Stripping Voltammetry (ASV)
ASV is used to determine metals and metalloids at trace levels. It involves two steps: deposition and stripping. First, a negative potential is applied to the...
Anodic Stripping Voltammetry (ASV)
ASV is used to determine metals and metalloids at trace levels. It involves two steps: deposition and stripping. First, a negative potential is applied to the...
175


