使用球磨机修改生物炭从水溶液中去除Cr(VI):多变量建模,优化和实验研究
Yunfeng Tan1, Jinxia Wang2, Lingling Zhan3
1College of River and Ocean Engineering, Chongqing Jiaotong University, Chongqing, 400074, China. yunfengtan@126.com.
Scientific reports
|February 28, 2024
概括
球磨小麦生物炭 (BM-WB) 提供了一种简单,低成本的方法,可以从水中去除有毒六价 (Cr(VI)). 这种增强的生物炭显著提高了Cr (VI) 的吸附能力和去除率,显示出水资源整治的巨大潜力.
科学领域:
- 环境科学 环境科学
- 材料科学 材料科学 材料科学
- 水处理 处理水的方法
背景情况:
- 六价 (Cr(VI)) 由于其毒性和致癌性,具有重大环境和健康风险.
- 传统的生物炭化学改造以去除Cr(VI) 往往是复杂的,昂贵的,并可能导致二次污染.
- 对于生产用于水处理的改性生物炭的环保,成本效益高,简单的方法有着极大的需求.
研究的目的:
- 开发一种新型,简单加工的改性生物炭,以有效地从水溶液中去除Cr (VI).
- 调查球磨小麦生物炭 (BM-WB) 对Cr6的吸附特性和去除机制.
- 优化吸附条件并评估BM-WB在水处理中的实际应用潜力.
主要方法:
- 用简单的球磨技术修改了小麦生物炭,以生产BM-WB.
- 进行了功能组,特定表面积和BM-WB粒子大小的表征.
- 进行了吸附实验,以分析Cr(VI) 去除动力学,异热量以及pH,温度和剂量的影响,采用响应表面方法.
主要成果:
- 球磨机显著减少了颗粒大小,增加了表面积,并增强了生物炭上的含氧功能组.
- BM-WB的Cr (VI) 吸附能力增加了3.5-9.1倍,达到52.21 mg/g.
- 在pH2,45°C和0.1g的吸附剂剂量下,通过伪二阶动力学和兰木尔异温模型,实现了100%的最佳Cr(VI) 清除.
结论:
- 球磨小麦生物炭 (BM-WB) 是一种高效,具有成本效益和环保的吸附剂,用于去除CrVI.
- 吸附机制涉及静电吸引,氧化还原反应和复杂化.
- 在水处理应用中,BM-WB显示出了修复Cr (VI) 污染的巨大潜力.
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