基于Mg改性生物炭的工程吸附剂用于分离和预度
Vladimír Frišták1, Kristína Beliančínová2, Lucia Polťáková2
1Department of Chemistry, Faculty of Education, Trnava University in Trnava, Priemyselná 4, P.O.BOX 9, Trnava, SK- 91843, Slovakia. fristak.vladimir.jr@gmail.com.
Scientific reports
|November 20, 2024
概括
这项研究开发了一种修饰生物炭 (MgBC) 来自尾叶,证明了其在去除等离子分析物的卓越性能. MgBC的吸附能力比未修改的生物炭 (BC) 高13.5倍,为样品预处理提供了有效的解决方案.
科学领域:
- 环境化学环境化学
- 材料科学 材料科学 材料科学
- 分析化学 分析化学
背景情况:
- 生物炭是一种用于样品预处理的新兴吸附剂.
- 修改生物炭特性可以增强其吸附能力.
- 叶生物质为生物炭生产提供了可持续的前体.
研究的目的:
- 从尾叶生物质中制备和表征生物炭 (BC) 和改性生物炭 (MgBC).
- 为了评估BC和MgBC对阳离子分析物的吸附性能,特别是 (As).
- 研究pH和竞争性离子对酸吸附的影响,并评估脱吸效率.
主要方法:
- 在500°C的温度下,未经修改的尾叶生物质 (BC) 和Mg-修改的生物质 (MgBC) 的缓慢热解.
- 使用pH,C/N分析,SSA,13C NMR,SEM-EDX和XRD等技术进行物理化学表征.
- 使用朗格穆尔和西普斯等热量和伪第九阶动力模型进行吸附实验.
- 酸盐和化物离子干扰的评估和使用NaOH的吸附性研究.
主要成果:
- 与BC相比,MgBC表现出明显不同的物理化学特性.
- 对于As,MgBC的最大吸附能力是BC的13.5倍.
- 吸附遵循Sips等温和和伪第九阶动力学,最佳pH在5-6之间.
- 酸离子显著降低了As吸附能力,而酸离子没有显著的影响.
- 使用0.1mol/L NaOH,吸效率超过95%,而MgBC在模型SPE列中显示35%的A保留.
结论:
- 来自猫尾叶的Mg修饰生物炭是离子分析物的高效吸收剂.
- MgBC 的增强吸附能力为分析化学中的预缩和分离技术带来了有前途的进步.
- 这项研究强调了定制生物炭材料在环境修复和样本分析方面的潜力.
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