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球磨和磁修改提升了用从水中获得的生物炭去除甲蓝:效率,机制和应用

Bei Wang¹, Yayun Ma^2,3, Pan Cao¹

¹School of Chemical and Environmental Engineering, Hunan Institute of Technology, Hengyang 421000, China.

Molecules (Basel, Switzerland)

|November 9, 2024

概括

球磨机显著提高了生物炭的性能.

科学领域:

环境科学环境科学
材料科学材料科学材料科学
化学化学化学

背景情况:

生物炭是一种有前途的污染物吸收剂.
甲蓝 (MB) 是一种常见的水污染物.
生物炭修饰可以提高吸附效率.

研究的目的:

为了研究水生物炭的球磨和Fe3O4修饰,用于甲蓝 (MB) 吸附.
评估热解温度对生物炭特性和MB吸附的影响.
通过实验数据和DFT计算,阐明吸附机制.

主要方法:

在不同的热解温度下从水中合成九种生物碳.
使用球磨和Fe3O4.4进行生物炭的修改.
生物炭结构性质的表征 (表面积,孔径,功能组).
甲蓝 (MB) 的吸附实验.
吸附异温和运动模型 (Langmuir,伪二阶).
密度函数理论 (DFT) 的计算.

主要成果:

球磨显著增加了特定表面积,孔径和功能组,特别是低温生物炭.
球磨磁性生物炭 (350°C) 的MB吸附能力达到244.6mgg-1,增加了8倍.
高温生物炭在广泛的pH范围内表现出有效的MB去除.
低温生物炭的MB去除效率取决于pH值.
DFT计算表明化学吸收和静电相互作用是主要吸附机制.

结论:

球磨是一种有效的方法,可以提高生物炭对MB的吸附能力.
改性生物炭 (WQM1) 显示出高吸附能力和稳定性,表明其作为MB去除吸附剂的潜力.
了解吸附机制有助于设计高效的基于生物炭的水处理解决方案.

关键词:

DFT计算方法的计算方法吸附动力学的吸附动力学球磨磁性生物炭球磨磁性生物炭颜色的颜色的颜色的颜色的颜色.热解的温度是热解的温度.

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