环境友好的纳米多孔聚合物凝用于可持续的废水处理
Tarek M Madkour1, Rasha E Elsayed1, Rasha A Azzam2
1Department of Chemistry, School of Science and Engineering, The American University in Cairo, Cairo 11835, Egypt.
Gels (Basel, Switzerland)
|December 27, 2024
概括
环保的纳米孔状凝有效吸附有毒染料,如甲蓝 (MB) 和刚果红 (CR). 这些用纳米颗粒增强的凝通过紫外线下的吸附和光催化降解实现了高的去除效率.
科学领域:
- 材料科学 材料科学 材料科学
- 环境化学环境化学
- 纳米技术纳米技术
背景情况:
- 废水中的有毒有机污染物对环境构成重大风险.
- 开发高效和环保的吸附剂对于水资源整治至关重要.
- 纳米孔状材料为污染物吸附提供了很大的表面积.
研究的目的:
- 设计和评估环保的纳米孔状凝,用于去除有毒有机污染物.
- 研究甲蓝 (MB) 和刚果红 (CR) 染料的吸附和光催化降解.
- 了解吸附机制,热力学和动力学.
主要方法:
- 使用分子建模来评估污染物和生物聚合物之间的结合亲缘关系.
- 使用盐晶作为原体,在聚合物凝中创建纳米孔.
- 在纳米孔状结构中加入催化 (Ni0) 纳米粒子.
- 在紫外线照射下进行吸附和光催化降解实验.
主要成果:
- 实现了高达90%的MB和80%的CR的去除效率.
- 热力学分析表明一种自发的,内热的,解离性吸附机制.
- 动力学研究采用了伪二阶模型,CR的扩散速度比MB快.
- MB吸附遵循兰格穆尔等温度,而CR遵循线性等温度.
结论:
- 用Ni0纳米颗粒功能化的纳米孔状凝对于去除染料是有效的.
- 该过程涉及初始物理吸收,随后是分离吸附和光催化降解.
- MB的降解产品仍然被吸附,而CR产品倾向于去吸附.
相关概念视频
01:27Bioplastics
Bioplastics derived from microbial processes present a sustainable alternative to conventional petroleum-based plastics. Among these, polyhydroxyalkanoates (PHAs), particularly polyhydroxybutyrates (PHBs), have emerged as prominent candidates due to their biodegradability and biocompatibility. These polymers are synthesized by a variety of bacteria, such as Cupriavidus necator and Pseudomonas putida, which naturally accumulate PHAs as intracellular carbon and energy reserves, especially under...
01:28Microbial Bioremediation of Plastics
Polyethylene terephthalate (PET) is a synthetic polymer widely utilized in the packaging industry, particularly for bottles and containers. Due to its chemical stability and durability, PET accumulates in the environment, contributing significantly to plastic pollution. It comprises repeating units of terephthalic acid and ethylene glycol, resulting in a semi-crystalline structure that is resistant to natural degradation processes.A notable breakthrough in plastic biodegradation came with the...