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氧化/化多阶段活性污泥生物炭:界面化学行为和Cd (II) 吸附性能

Chao Yan^1,2, Guojun Cai^3,4

¹School of Civil Engineering, Anhui Jianzhu University, Hefei, 23061, People's Republic of China. yanchao729@ahjzu.edu.cn.

Environmental science and pollution research international

|March 27, 2024

概括

改性污泥生物炭有效吸附 (II) 离子. 分级激活显著提高吸附能力和材料再生,用于处理污染了的废水.

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:

市政污泥生物炭是重金属的潜在吸附剂.
现有的生物炭材料可能需要修改以提高吸附效率.
((II) 是工业废水中发现的有毒重金属污染物.

研究的目的:

准备和研究改造的城市污泥生物炭的 (II) 吸附性能.
评估氧化/化 (NaOH/MgCl2) 分级激活对生物炭特性和吸附能力的影响.
探索改良生物炭的吸附机制和再生潜力.

主要方法:

市政污泥生物炭被制备,然后使用氧化/化 (NaOH/MgCl2) 分级激活进行修改.
进行了吸附实验,以确定的吸附动力学和的同热量.
进行了生物炭特性,吸附能力和再生效率的表征.

主要成果:

NaOH/MgCl2分级激活改善了污泥生物炭的表面结构和石墨化.
修改后的生物炭 (NBC-Mg) 与未修改的生物炭 (BC) 和NaOH活性生物炭 (NBC) 相比,具有显著更高的 (II) 吸附能力 (143.49 mg/g).
吸附遵循伪二阶动力学和兰迈尔模型,其机制包括离子交换,复杂化和-π相互作用. 在5个再生周期后,去除效率保持在90%以上.

结论:

使用NaOH/MgCl2的污泥生物炭的多阶段激活是一种有效的策略,可以增强的吸附.
修改后的污泥生物炭显示出出色的吸附能力,可重复使用性和处理含有的废水的潜力.
这项研究提供了一种可持续的方法,用于将污泥废物利用成高性能吸附剂.

关键词:

吸附性能吸附性能吸附性能是的组成部分.多阶段激活多阶段激活潜在的机制潜在的机制污泥生物炭是一种生物炭.

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