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用磁性生物炭从水溶液中去除:吸附特性和机制

Zhiwen Li^1,2,3, Ruiyan Niu^1,2,3, Jiaheng Yu^1,2,3

¹Heilongjiang Provincial Key Laboratory of Environmental Microbiology and Recycling of Argo-Waste in Cold Region, College of Life Science and Biotechnology, Heilongjiang Bayi Agricultural University, Daqing, 163319, Heilongjiang, China.

Environmental science and pollution research international

|December 28, 2023

概括

来自牛和草的磁性生物炭有效地从废水中去除 (Cd (II)). 在最佳条件下,牛生物炭表现出优越的吸附能力,提供了一个可持续的废物利用策略.

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:

农业废物,如牛和玉米,是处置的挑战.
(Cd(II)) 是一种常见于废水中的有毒重金属污染物.
生物炭是一种从生物质热解中获得的富含碳的材料,显示出污染物修复的潜力.

研究的目的:

通过联合降水方法,从牛和玉米中合成磁性生物炭.
研究磁性生物炭在从水溶液中吸附 (Cd(II)) 的效率.
探索各种参数对Cd (II) 吸附的影响,并优化该过程.

主要方法:

通过共同降水合成磁性牛和草生物炭.
使用SEM,BET,Zeta,FTIR,Raman,XPS和VSM进行了物理化学性质的表征.
进行了批量吸附实验,以研究pH值,生物炭剂量和接触时间的影响,使用吸附动力学和异热量进行分析.

主要成果:

与未经修改的生物炭相比,磁性生物炭表现出增强的表面粗性,增加含氧的功能组,以及更大的特定表面积.
) 的吸附受到pH值,磁性生物炭剂量,初始度和吸附时间的显著影响.
吸附遵循弗洛伊德利希模型和伪二阶动力模型,牛生物炭显示出比草生物炭更高的吸附能力.

结论:

牛的磁性生物炭是一种有效的吸附剂,可以从废水中去除Cd (II),在800°C,pH 5和0.14g的剂量下具有最佳的吸附.
玉米的磁性生物炭也显示出显著的Cd (II) 吸附能力,在600°C,pH 8和0.12g剂量下得到优化.
这项研究突出了利用农业废弃物的潜力,以创建用于重金属整治的功能磁性生物炭.

关键词:

吸附方式吸附方式吸附方式是的组成部分.重金属是一种重金属.磁性生物炭是一种磁性生物炭.

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