三金属Fe-Zn-Mn (氧) 水氧化物增强的咖啡生物炭用于同时酸盐和的回收和回收
Diana Guaya1, Jhuliana Campoverde1, Camilo Piedra2
1Departamento de Química, Universidad Técnica Particular de Loja, Loja 110107, Ecuador.
Nanomaterials (Basel, Switzerland)
|June 11, 2025
概括
用金属纳米颗粒修改的消耗咖啡粉生物炭有效地从废水中去除多余的和. 这种可持续吸附剂为营养回收和土壤修改提供了潜力,促进循环经济.
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:
- 废水中过量的 (P) 和 (N) 会导致肥胖,需要可持续的回收方法.
- 开发低成本,高效的吸附剂对于从废水中去除营养是至关重要的.
研究的目的:
- 通过用Mn2+/Zn2+/Fe3+ (氧) 氧化物纳米粒子修饰的消耗咖啡粉生物炭 (CB) 合成和评估一种新型吸附剂 (CB-M).
- 评估从合成和真实废水中同时去除酸盐和的情况.
- 研究开发的吸附剂的吸附机制,热力学和可重复使用性.
主要方法:
- 使用合成溶液和市政废水进行批量吸附实验.
- 动力学,异热学和热力学分析以了解吸附行为.
- 顺序提取以确定吸附酸盐的命运并评估肥料潜力.
主要成果:
- CB-M实现了高酸盐吸附能力 (42.672.0 mg PO43-·g-1) 和降低了废水度低于0.01 mg·L-1.
- 观察到中度的氨去除 (2.82.95毫克NH4+·g-1) 的情况.
- 酸盐吸附是自发的,内热的,并由内球复合主导;氨吸收涉及离子交换.
- 超过70%的吸附酸盐与Fe-Mn-Zn相相关,这表明慢释放肥料的潜力.
- 吸附剂显示结构完整性和可重复使用性与部分脱吸.
结论:
- CB-M 是一种高度选择性和有效的吸附剂,用于在中性pH下从废水中去除酸盐.
- 该材料将废物转化为营养回收和土壤修改的有价值资源,符合循环经济原则.
- 这种方法为废水处理提供了一个可持续的解决方案,而不会引入二次污染.
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