生物吸收银纳米颗粒装饰咖啡-地面废物复合物用于清洁水和抗菌应用
Azza A Al-Ghamdi1,2, Sherif M Ibrahim3, Xingmei Lu4,5,6
1Department of Chemistry, College of Science, Imam Abdulrahman Bin Faisal University, P.O. Box 1982, 31441, Dammam, Saudi Arabia.
Environmental science and pollution research international
|January 6, 2025
概括
银纳米颗粒装饰咖啡废物 (CWAg) 有效地从废水中去除 (Cr(VI)) 和甲蓝 (MB). 这种可持续的生物吸收剂还具有显著的抗菌特性,使其成为环境修复的多功能解决方案.
科学领域:
- 环境科学 环境科学
- 材料科学 材料科学 材料科学
- 纳米技术纳米技术
背景情况:
- 污染废水的重金属如 (Cr(VI)) 和有机染料如甲蓝 (MB) 构成严重的环境和健康风险.
- 开发可持续和高效的吸附剂对于有效的水净化至关重要.
- 咖啡土壤废弃物为吸附材料提供了一个低成本,丰富和可再生的来源.
研究的目的:
- 合成和表征银纳米颗粒装饰的咖啡地面废物 (CWAg) 作为可持续的生物吸收剂.
- 评估CWAg在从水溶液中去除Cr (VI) 和MB方面的效率.
- 为了研究CWAg.的抗菌特性.
主要方法:
- 在现场减少方法用于合成CWAg.
- 使用SEM-EDX,PZC,FTIR,XRD,HR-TEM和XPS进行表征.
- 在各种条件下 (温度,pH,剂量) 进行Cr(VI) 和MB去除的吸附实验.
- 动力学和异热学研究以确定吸附机制.
- 抗菌活性测试针对格拉姆阳性和格拉姆阴性细菌.
主要成果:
- CWAg实现了高吸能力:在323 K和pH 2.0下为Cr (VI) ~149.9 mg/g,在293 K和pH 6.0下为MB ~113.4 mg/g.
- 吸附遵循Sips等温和和伪二次运动模型,具有快速平衡时间.
- 在pH 6.0观察到协同的Cr(VI) 和MB吸附,在pH 2.0.0观察到对抗性.
- 使用NaOH和HCl实现了有效的脱吸和再生,效率损失最小 (9-13%).
- CWAg表现出显著的抗菌活性,由银纳米颗粒增强.
结论:
- CWAg是一种高效,可持续的生物吸收剂,用于从废水中去除Cr (VI) 和MB.
- 该材料具有出色的可重复使用性和再生能力.
- 加入银纳米颗粒显著提高了咖啡土废物的抗菌效果.
- 在处理复杂的工业废水方面,CWAg显示出有前途的应用,例如皮厂废水.
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