从电废水中吸附,使用从水中制造的活性碳来电
Zemene Worku1, Samuel Tibebu2, Jemal Fito Nure3
1Department of Environmental Engineering, Addis Ababa Science, and Technology University, 16417, Addis Ababa, Ethiopia. hezeni@gmail.com.
BMC chemistry
|July 24, 2023
概括
这项研究有效地从工业废水中去除了,使用来自水黄的活性炭. 优化的工艺实现了90.4%的去除,显示了大规模水处理应用的前景.
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:
- 工业废水,特别是电废水,往往含有高度,造成严重的环境和公共卫生风险.
- 未经处理的排放污染了水资源,导致生态破坏和健康问题.
- 有效和可持续的去除方法对于工业废水处理至关重要.
研究的目的:
- 为了研究从电废水中去除 (Cr),使用从水中提取的活性碳.
- 通过检查pH值,吸附剂剂量和接触时间等因素来优化吸附过程.
- 描述活性炭并评估其吸附机制和可重复使用性.
主要方法:
- 活性炭是从水中通过酸激活和热分解生产的.
- 活性炭的表征包括BET表面积,SEM形态,XRD和FTIR分析.
- 使用全因数实验设计来确定最佳吸附条件 (pH,吸附剂剂量,接触时间).
- 吸附动力学和异热量分别使用伪二阶模型和朗慕尔模型进行分析.
- 进行了再生研究,以评估吸附剂在多个循环中的可重复使用性.
主要成果:
- 合成的活性炭表现出高表面积 (203.83 m2/g) 和特有的功能组.
- 在pH2下,1.5g/100mL吸附剂剂量和120分钟的接触时间,达到90.4%的最大去除效率.
- 对于真正的电废水,在最佳条件下,最大的去除效率为81.2%.
- 兰迈尔和伪二阶模型最好地描述了吸附过程,表明化学结合和单层吸附.
- 在七个再生周期中,吸附剂的效率从93.25%下降到21.35%.
结论:
- 来自水的活性炭是一种可行的和有效的吸附剂,用于从工业废水中去除.
- 吸附过程受pH值,吸附剂剂量和接触时间的影响,确定了最佳条件.
- 吸附机制涉及化学结合,这表明和吸附剂之间存在强烈的相互作用.
- 虽然再生效率随着周期的推移而下降,但吸附剂显示出重复使用的潜力.
- 开发的技术显示出可扩展的废水处理工业应用的前景.
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