探索改造的草生物炭作为一种可持续的解决方案,同时从废水中去除Cr (VI) 和Pb (II) 污水:特征,机制见解和应用可行性
Yogeshwaran Venkatraman1, Priya Arunkumar2,3, Nadavala Siva Kumar4
1Department of Civil Engineering, Sri Krishna College of Engineering and Technology, Coimbatore 641008, India.
ACS omega
|October 23, 2023
概括
草有效地通过批量吸附从废水中去除 (Cr (VI)) 和 (Pb (II)). 这种可持续的生物吸收剂具有很高的去除率,可以用盐酸再生.
科学领域:
- 环境化学环境化学
- 材料科学 材料科学 材料科学
- 水处理 处理水的方法
背景情况:
- 污染废水的重金属如 (Cr) 和 (Pb) 构成重大环境和健康风险.
- 开发具有成本效益和可持续的吸附剂来去除重金属对于有效的废水处理至关重要.
研究的目的:
- 研究化学合成和硫酸激活的米作为生物吸收剂的有效性,用于从废水中去除Cr (VI) 和Pb (II).
- 描述生物吸收剂并优化吸附条件,以最大限度地去除重金属.
主要方法:
- 米被化学合成并使用缩的硫酸激活.
- 使用FTIR,SEM,EDX和XRD分析进行了生物吸收剂的表征.
- 进行了批量吸附实验,以评估pH值,生物吸收剂剂量,初始离子度和接触时间的影响.
主要成果:
- 在特定条件下 (pH2.0,剂量为2 g/L,度为20 mg/L,接触时间为50分钟) 达到最佳的去除效率,为Cr (VI) 95.57%,Pb (II) 85.68%.
- 吸附遵循多层动力学,表明在异质的生物吸收表面上存在速率扩散机制.
- 热力学研究表明吸附过程是内热和自发的.
- 使用0.3N盐酸 (HCl) 实现了最高的脱吸率.
结论:
- 米是一种可行且有效的生物吸收剂,可以从废水中去除Cr (VI) 和Pb (II).
- 吸附过程在酸性条件下是有利的,并遵循特定的动力和异热模型.
- 生物吸收剂显示出再生和再利用的潜力,使其成为污水处理的经济上有吸引力的选择.
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