叶水凝的化学修饰,以有效地从高硬度的地下水中去除
Jaffar Irfan1, Arshad Ali1, Muhammad Ajaz Hussain2
1Institute of Chemistry, University of Sargodha, Sargodha 40100, Pakistan.
International journal of biological macromolecules
|December 25, 2023
概括
这项研究开发了一种经过修改的水凝 (NaSALH),用于有效地从水中去除. 可再生吸附剂显示出高吸附能力和自发的,外热的吸收.
科学领域:
- 材料科学 材料科学 材料科学
- 环境化学环境化学
- 生物聚合物工程 生物聚合物工程
背景情况:
- 重金属污染,特别是 (Cd2+),对水生生态系统和人类健康构成重大风险.
- 传统的水处理方法去除可能是昂贵和低效的.
- 从自然资源中开发可持续且具有成本效益的吸收材料对于环境修复至关重要.
研究的目的:
- 合成和表征一种新型吸附材料,该材料是从草水凝中提取的,用于去除离子.
- 为了研究从水溶液中获得Cd2+的修改的草水凝的吸附效率和机制.
- 评估合成吸附剂的可再生性和可重复使用性,用于实际应用.
主要方法:
- 水凝 (ALH) 被化和肥化,形成化水凝 (SALH) 和肥化水凝 (NaSALH).
- 福利埃变换红外光谱法 (FTIR),固态CP/MAS 13C NMR和扫描电子显微镜与能量分散式X射线光谱法 (SEM-EDX) 用于表征.
- 进行了批量吸附实验,以确定pH值,吸附剂剂量,初始Cd2+度,接触时间和温度对吸附效率的影响.
主要成果:
- 光谱分析证实了SALH和NaSALH的成功合成.
- 纳萨尔赫的零电荷点 (pHZPC) 为4.90,表示负电荷的表面.
- 按照Langmuir异热模型,最大Cd2+吸附容量为227.27 mg g-1 (饮用水) 和212.77 mg g-1 (重地下水) 实现.
- 吸附遵循伪二阶动力学,表明一种化学吸附机制.
- 热力学分析表明自发和外热Cd2+吸附 (负 ΔG°和 ΔH°).
结论:
- 修改的水凝 (NaSALH) 是一种高效和可再生的生物吸收剂,用于从污染水中去除.
- 该研究强调了利用植物性水凝作为环境修复的可持续材料的潜力.
- 纳萨尔提供了一个有希望的,具有成本效益的解决方案,用于解决水资源中的重金属污染问题.
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