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通过通过湿处理酸预处理,利用从甜菜残留物中提取的低温生物炭有效地去除Cr (VI)
Dong Xie1, Jingxu Yang1, Xiaohou Zhou1
1Ministry of Education Research Center for Comprehensive Utilization and Clean Processing Engineering of Phosphorus Resources, School of Chemical Engineering, Sichuan University, Chengdu, 610065, PR China.
Environmental research
|November 20, 2025
概括
菌残留物被转化为低温生物炭,以有效地从废水中去除. 酸化增强了生物炭的作用.
科学领域:
- 环境化学环境化学
- 材料科学 材料科学 材料科学
- 废物管理 废物管理
背景情况:
- 废水中的 (Cr) 污染对环境和健康构成重大风险.
- 传统的废水处理方法可能是昂贵的,并且在去除Cr方面效率较低.
- 从生物废弃物中提取的生物炭提供了一个可持续且具有成本效益的吸附材料.
研究的目的:
- 从残留物中开发低温生物炭,以有效地去除 (VI) (CrVI).
- 调查湿处理酸 (WPPA) 预处理对生物炭特性和吸附能力的影响.
- 为了阐明准备的生物炭上的Cr (VI) 吸附机制.
主要方法:
- 菌残留物经过WPPA预处理,并在低温 (200-400°C) 下进行烧解.
- 使用SEM,BET,XRD,FTIR,Raman和XPS进行生物炭特性表征.
- 进行了批量吸附实验,以评估Cr (VI) 去除效率和吸附能力.
主要成果:
- 化生物炭表现出比原始生物炭显著更高的Cr (VI) 去除效率.
- 生物炭在250°C (HBC250) 化后,可达到Cr (VI) 的最大吸附能力为191.1 mg/g.
- 低温热解能保留含氧的功能组,增强吸附.
结论:
- 用WPPA预处理的低温生物炭是一种有效和经济的吸附剂,用于去除Cr (VI).
- 吸附机制包括静电相互作用,孔隙填充,化学减少和复杂化.
- 本研究提出了生物废物利用和废水整治的可持续战略.
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