纤维素/瓜尔/生物炭复合水凝的吸附性质为Cu2+,Co2+和甲蓝
Lingze Yang1, Lei Bao1, Tong Dong1
1School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China.
International journal of biological macromolecules
|May 27, 2023
概括
修改的Typha angustifolia (MTC) 用于创建用于废水处理的复合水凝. 这种环保材料有效地去除诸如Cu2+和Co2+等重金属,以及甲蓝色染料.
科学领域:
- 材料科学 材料科学 材料科学
- 环境化学环境化学
- 化学工程是化学工程的重要组成部分.
背景情况:
- 废水被重金属和有机染料污染造成了严重的环境和健康风险.
- 开发具有成本效益和可持续的吸附剂对于有效的污染物去除至关重要.
研究的目的:
- 通过修改的Typha angustifolia生物炭合成一种新的复合水凝,用于重金属和染料去除.
- 在各种条件下研究开发的水凝的吸附性能和机制.
主要方法:
- 泰法士叶被化学修饰用甲酸盐,以产生修饰的泰法士叶 (MTC).
- 通过使用MTC,碳甲基纤维素 (CMC) 和瓜尔 (GG) 的自由基聚合制备了一种复合水凝 (CMC/GG/MTC).
- 进行了吸附实验,以确定最佳条件并评估Cu2+,Co2+和甲基蓝 (MB) 的吸附能力.
主要成果:
- 该CMC/GG/MTC水凝显示出高吸附能力:805.45毫克g-1为Cu2+,772.52毫克g-1为Co2+,和598.28毫克g-1为MB.
- 射线光电子光谱 (XPS) 显示了表面复杂化和静电吸引力作为主要去除机制.
- 吸附剂在5个吸附-脱吸周期中保持了良好的吸附和再生能力.
结论:
- 一种低成本,稳定和高效的复合水凝吸附剂成功地从改性Typha angustifolia生物炭中制备出来.
- 开发的水凝显示出在废水中重金属离子和阴离子染料污染物的修复方面具有很好的潜力.
- 本研究提出了一种可持续的方法,用于将生物质提升为高性能水处理材料.
更多相关视频
09:04Covalent Binding of Antibodies to Cellulose Paper Discs and Their Applications in Naked-eye Colorimetric Immunoassays
Published on: October 21, 2016
14.7K
10:44Preparation of Biomass-based Mesoporous Carbon with Higher Nitrogen-/Oxygen-chelating Adsorption for CuII Through Microwave Pre-Pyrolysis
Published on: February 12, 2019
10.0K
相关概念视频
03:02Colors and Magnetism
Color in Coordination Complexes
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human eye.
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human eye.
01:09Colloidal precipitates
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...
01:17Precipitation 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...
01:06Coagulation
Colloidal solids are solid particles suspended in solution. They are usually negatively charged, attracting a compact primary layer of positively charged ions, which attract more counterions to form an electrical double layer. Electrostatic repulsion between the charged double layers prevents the particles from colliding, stabilizing the colloids. These solids are often undesirable because they can contain toxins that are difficult to remove. Coagulation is a technique that helps aggregate and...
00:56Extraction: 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 formed in...
01:17Ion Exchange
Ion exchange chromatography separates charged molecules from a solution by reversibly exchanging them with mobile, or 'active', ions associated with the oppositely charged stationary phase. This method can be used to separate ions, soften and deionize water, and purify solutions. The polymers comprising the ion-exchange column are high-molecular-weight and chemically stable polymers, crosslinked to be porous and essentially insoluble. They are also functionalized with either acidic or basic...