来自Plinia cauliflora的新型吸附材料,用于从水溶液中去除阴离子染料
Natalia Nara Janner1, Luana Vaz Tholozan1, Guilherme Kurz Maron2
1Chemical Engineering, Federal University of Pampa, Bagé 96413-172, Brazil.
Molecules (Basel, Switzerland)
|May 27, 2023
概括
用化学物质激活的Jaboticaba剥皮废物有效地从水中去除甲蓝色染料. 未经修改的jaboticaba树皮具有最高的吸附能力,为废水处理提供可持续的解决方案.
科学领域:
- 环境化学环境化学
- 材料科学 材料科学 材料科学
- 废物管理 废物管理
背景情况:
- 食品工业产生大量有机废物,带来环境和经济挑战.
- 工业残留物Jaboticaba皮,由于其特性,具有潜在的应用.
- 从废物中开发增值产品支持循环经济,并减少处置问题.
研究的目的:
- 用酸 (H3PO4) 和氧化 (NaOH) 来化学激活jaboticaba树皮 (JB) 残留物.
- 从激活的jaboticaba树皮中开发一种低成本的吸附材料,用于去除甲蓝 (MB) 染料.
- 评估开发的吸附剂的吸附性能和吸附能力.
主要方法:
- 用H3PO4和NaOH化学激活jaboticaba树皮残留物.
- 批量吸附实验用于甲蓝 (MB) 去除,使用因数设计以获得最佳条件 (0.5 g L-1吸附剂剂量,中性pH).
- 动力学和同热学研究以确定吸附率和机制 (兰格穆尔和弗罗恩德利希模型).
主要成果:
- 在JB和JB-NaOH的30分钟内达到吸附平衡,而在JB-H3PO4的60分钟内达到吸附平衡.
- 吸附数据适合JB的朗慕尔模型和JB-NaOH和JB-H3PO4的弗洛伊德利希模型.
- JB的最大吸附能力为305.81毫克g-1,JB-NaOH的最大吸附能力为241.10毫克g-1,JB-H3PO4的最大吸附能力为122.72毫克g-1.
结论:
- 没有激活的jaboticaba树皮 (JB) 具有最高的甲蓝吸附能力.
- 化学激活会影响孔隙结构和功能组,影响吸附效率.
- 贾博蒂卡巴树皮是一种可持续的,低成本的吸附剂,用于清除水污染,促进零废弃物方法.
更多相关视频
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
07:28An Efficient Method for Selective Desalination of Radioactive Iodine Anions by Using Gold Nanoparticles-Embedded Membrane Filter
Published on: July 13, 2018
7.5K
相关概念视频
01:17Ion Exchange
627
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...
627
01:09Colloidal precipitates
631
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...
631
03:11Precipitation of Ions
28.0K
Predicting Precipitation
The equation that describes the equilibrium between solid calcium carbonate and its solvated ions is:
The equation that describes the equilibrium between solid calcium carbonate and its solvated ions is:
28.0K
01:09Analyte Adsorption and Distribution
703
In certain chromatographic separations, solutes transfer between the mobile phase and the stationary phase via sorption, which typically refers to the process of adsorption. For many chromatographic systems, the sorption process often depends on the polarity of the compounds—an expression of the overall dipole moment within the molecule. During the separation process, there is competition between the solute and solvent for adsorption to the stationary phase. Highly polar compounds and...
703
00:56Extraction: Advanced Methods
497
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...
497