生产单元纤维素基水凝及其用作水性污染物的吸附剂
Seonghyun Park1, Seunghyun Yoo1, Seong-Min Cho1
1Department of Forest Biomaterials, North Carolina State University, Raleigh, NC 27695, USA.
International journal of biological macromolecules
|May 29, 2023
概括
研究人员开发了一种新的纤维素酸盐 (CAS) 水凝吸附剂,用于环境清洁. 这种生物基材料有效地去除甲基蓝色,显示了水净化应用的前景.
科学领域:
- 材料科学 材料科学 材料科学
- 环境科学 环境科学
- 聚合物化学 聚合物化学
背景情况:
- 越来越多的环境问题推动了对可持续的生物资源的需求.
- 基于纤维素的材料由于其丰富性和可再生性而具有吸引力.
- 开发高效的吸附剂对于处理水性污染物至关重要.
研究的目的:
- 从纤维素酸硫酸盐 (CAS) 中合成一种新的水凝吸附剂.
- 为了评估CAS水凝对水污染物的吸附性能.
- 探索CAS水凝作为可持续吸附剂的潜力.
主要方法:
- 一合成纤维素酸硫酸盐 (CAS).
- 在脱离离子水中通过分子间相互作用形成CAS水凝.
- 使用双价 (例如,Ca2+) 提高水凝的耐用性,用于离子交联.
- 使用甲蓝 (MB) 作为模型污染物的吸附实验.
主要成果:
- CAS水凝具有热可逆性,并且很容易成形.
- 离子交联的CAS水凝显示出甲蓝的高吸附能力为245 mg/g.
- 吸附动力学遵循伪二阶模型,平衡数据符合兰格穆尔等热法.
- 吸附剂在5个吸附-脱附周期后保持了70%的去除效率.
结论:
- CAS水凝的简单合成和形成过程为生产有效吸附剂提供了可行的途径.
- 作为可重复使用和可持续的吸附剂,CAS水凝具有显著的潜力,用于从水中去除污染物.
- 这项研究强调了基于纤维素的水凝作为环境修复的有希望的替代品.
相关概念视频
01:18Detergent Purification of Membrane Proteins
Detergents are used to purify the integral proteins of the membrane. The hydrophobic portion of the detergent can replace membrane phospholipids while solubilizing the membrane proteins. When detergent monomers reach a specific concentration in a solution called critical micelle concentration (CMC), they form micelles. Above CMC, the concentration of the detergent monomers remains in equilibrium with the micelle. The number of detergent monomers present in the CMC varies for each detergent, and...
01:20Types of Step-Growth Polymers: Polyesters
The introduction of polyesters has brought major development to the textile industry. The wrinkle-free behavior of polyester blends has eliminated the need for starching and ironing clothes.
Polyesters are commonly prepared from terephthalic acid and ethylene glycol; the crude product is known as poly(ethylene terephthalate) or PET. However, polyesters are synthesized industrially by transesterification of dimethyl terephthalate with ethylene glycol at 150 °C. The two reactants and the polymer...
Polyesters are commonly prepared from terephthalic acid and ethylene glycol; the crude product is known as poly(ethylene terephthalate) or PET. However, polyesters are synthesized industrially by transesterification of dimethyl terephthalate with ethylene glycol at 150 °C. The two reactants and the polymer...
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...
01:30Biological Treatment of Effluent and Waste Water
Biological wastewater treatment relies on the metabolic activity of microorganisms to remove pollutants from sewage. In modern treatment systems, this process is organized into sequential stages that progressively reduce solid material, dissolved organic matter, and microbial contamination. Each stage plays a distinct role in improving water quality and preparing the effluent for safe discharge or reuse.Primary and Secondary TreatmentPrimary treatment is a physical process that removes large...
01:29Downstream Processing
Downstream processing begins once fermentation is complete and involves a series of steps to recover and purify products such as acids, vitamins, antibiotics, or proteins.Cell HarvestingFor example, for intracellular protein-based products, the first step is harvesting the cells. This is typically achieved using centrifugation or filtration to separate the cells from the liquid phase.Cell Disruption for Intracellular ProductsIf the target product is intracellular, the harvested cells must be...