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重金属和染料从水溶液中通过生物基土/花素水凝进行共同吸附和选择性吸附

Rongping Chen¹, Chenghao Gan¹, Bingcai Cai¹

¹College of Biology and the Environment, Nanjing Forestry University, Nanjing 210037, China.

Journal of environmental sciences (China)

|June 6, 2024

概括

由湿土 (HS) 和酸盐 (CS) 制成的环保吸附剂有效地去除阴离子和阴离子污染物. 这种生物降解材料具有很高的吸附能力和选择性,具有水处理和污染物回收的潜力.

科学领域:

环境科学环境科学
材料科学材料科学材料科学
化学化学化学

背景情况:

开发可持续且具有成本效益的吸附剂对于净水至关重要.
天然生物聚合物,如湿土 (HS) 和酸盐 (CS),提供可生物降解和可再生资源.
结合不同的生物聚合物可以产生协同效应,增强吸附性能.

研究的目的:

通过使用反悬浮交联,从湿土 (HS) 和酸盐 (CS) 制备环保吸附剂.
为了研究HS/CS复合物的吸附性能对多种阴离子和阴离子污染物.
探索新型吸附剂的吸附机制,选择性和再生能力.

主要方法:

反向悬浮交联方法用于吸附剂制剂.
批量吸附实验以评估甲基色 (MO),CrVI,甲基蓝 (MB) 和PbII的去除.
同热,动力和协同吸附研究,以及用于阐明机制的DFT分析.

主要成果:

这种HS/CS吸附剂对MO (242 mg/g),Cr (VI) (69 mg/g),MB (188 mg/g) 和Pb (II) (57 mg/g) 具有很高的吸附能力.
观察到两吸附行为,允许去除阳离子和阴离子污染物.
在酸性条件下观察到MB比Pb (II),MO比Cr (VI) 的选择性吸附.
吸附遵循兰格穆尔等热量和伪二次动力学.
DFT证实了化,静电,H键和π-π相互作用作为关键机制.

结论:

HS/CS复合物是一种高效,可重复使用和环保的吸附剂,用于各种水污染物.
吸附剂具有可调节的选择性,使其在污染物分离和资源回收方面具有潜在的应用.
该研究提供了对吸附机制的见解,支持HS/CS在废水处理中的实际应用.

关键词:

吸附方式吸附方式吸附方式基托桑是一种酸盐.密度函数理论 (DFT) 是一种密度函数理论.人类 (Humus humus) 是一种植物.

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