使用木皮 (Manihot Esculenta Crantz) 进行pb (II) 和cr (VI) 去除的比较研究
Rahmiana Zein1, Deswati Deswati2, Syiffa Fauzia3
1Analytical Environmental Chemistry Laboratory, Department of Chemistry, Andalas University, Padang, Indonesia.
International journal of phytoremediation
|July 3, 2024
概括
大麻皮有效地从水中去除 (Pb) 和 (Cr). 这项研究详细介绍了最佳条件,并证实了生物吸收剂.
科学领域:
- 环境科学 环境科学
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
背景情况:
- 重金属污染对水生生态系统和人类健康构成重大风险.
- 工业废水经常含有有毒的重金属,如 (Pb) 和 (VI) (Cr).
- 开发具有成本效益和可持续的重金属修复方法至关重要.
研究的目的:
- 评估木皮作为生物吸收剂的有效性,以从水溶液中去除Pb (II) 和Cr (VI).
- 用麻豆皮来确定重金属吸附的最佳条件 (pH,度,接触时间).
- 描述吸附机制并评估该过程的热力学可行性.
主要方法:
- 进行了批量吸附实验,以调查豆皮去除Pb (II) 和Cr (VI) 的情况.
- 包括pH值,初始金属度和接触时间在内的吸附参数得到了优化.
- 进行了吸附异温,动力学和热力学研究.
- 使用FTIR,XRF,SEM和TGA进行了生物吸收剂的表面表征.
主要成果:
- 最佳的Pb(II) 吸附发生在pH 5,初始度为1000 mg/L,接触时间为50分钟.
- 最佳的Cr(VI) 吸附发生在pH值为2,初始度为1200 mg/L,接触时间为70分钟.
- 吸附遵循兰格穆尔等温和和伪二次运动模型,表明化学吸附.
- 热力学分析显示了一种自发的内热吸附过程.
结论:
- 大麻皮是一种高效和可持续的生物吸收剂,可从污染水中去除Pb (II) 和Cr (VI).
- 该研究提供了关于最佳吸附条件和重金属修复机制的宝贵数据.
- 鉴定结果证实了吸附过程中所涉及的物理和化学相互作用,即使在真实水样上也实现了高的去除效率.
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