吸附和生态毒理学研究用Cr (VI) 离子的水溶液,使用来自Inga edulis的吸附剂材料
Lucas Dos Santos Lima1, Erica Porto Fernandes1, Andrea Novelli2
1Research Group in Electrochemical Sensors and Nano(Materials) - SEnM, Laboratory of Corrosion and Nanotechnology - LCNT, Graduate Program in Chemistry, Department of Chemistry, Federal University of Sergipe, Av. Marcelo Deda Chagas, 304, Rosa Elze, São Cristóvão, Sergipe, 49107-230, Brazil.
Chemosphere
|April 8, 2025
概括
英加伊杜利斯树皮被转化为吸附剂,以从水中去除有毒的Cr (VI) 离子. 活性化 inga 生物质 (AIB) 显示出高吸附能力,排毒水,并显示出可再生能源应用的潜力.
科学领域:
- 环境科学 环境科学
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
背景情况:
- 六价 (Cr(VI)) 是一种有毒的污染物,需要有效的去除方法.
- 生物质衍生吸附剂为环境修复提供了一种可持续的方法.
- 英加伊杜利斯树皮为吸附剂开发提供了一个未充分利用的资源.
研究的目的:
- 开发和表征从Inga edulis树皮中提取Cr (VI) 去除的吸附剂.
- 为了研究吸附机制,容量和热力学特性.
- 评估吸附材料的生态毒性降低和潜在的电化学应用.
主要方法:
- 用硫酸对 Inga edulis 树皮进行化学激活.
- 批量吸附实验以确定最佳条件 (pH,剂量).
- 动力和等温模型 (Elovich,Langmuir,Freundlich). 动力和等温模型 (Elovich,Langmuir,Freundlich). 动力学和等温模型 (Elovich,Langmuir,Freundlich). 动力学和等温模型.
- 用于表面分析的X射线光电子光谱 (XPS).
- 热力学研究和生态毒性测定 (Daphnia similis).
- 用于演化反应 (HER) 的衍生电极的制造和电化学评估.
主要成果:
- 与原始英加生物质 (IB) 相比,活化英加生物质 (AIB) 的Cr (VI) 清除效率和容量 (356.6 mg g−1) 显著更高.
- 吸附遵循埃洛维奇动力学,表明异质的表面吸附,并且最好地描述的是Langmuir用于IB和Freundlich用于AIB.
- 证实了XPS的Cr (VI) 减少到Cr (III).
- 吸附是自发的和外热的IB,内热的AIB.
- AIB有效地消除了对Daphnia similis.的Cr (VI) 毒性.
- 衍生电极 (CPEAIB-Cr-ads-active) 在 HER.中显示出有前途的性能.
结论:
- 树皮,特别是当化学激活时,是一种高效和可持续的吸附剂,用于Cr (VI) 的去除.
- 开发的材料成功地排毒了受CrVI污染的水.
- 吸附剂显示出在环境修复和可再生能源 (HER) 中双重应用的潜力.
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