基于KMnO4氧化全松针的吸附剂,用于选择性和有效地去除阴离子染料
Babita Kumari1, Ghanshyam S Chauhan1, Sunita Ranote1,2
1Department of Chemistry, Himachal Pradesh University, Shimla, India.
International journal of phytoremediation
|July 6, 2023
概括
化学修饰松针 (OPNs) 有效地从废水中去除了阴阳性染料. 这种可持续的吸附剂显示出高容量和可回收性,用于马拉绿色和甲蓝色的去除.
科学领域:
- 环境化学环境化学
- 材料科学 材料科学 材料科学
- 吸附科学 吸附科学
背景情况:
- 由合成染料污染的废水造成环境风险.
- 松针 (PNs) 是丰富的纤维素生物质,具有改变的潜力.
- 开发具有成本效益和可持续的吸附剂对于去除染料至关重要.
研究的目的:
- 为了化学修改松针 (PNs) 进入氧化形式 (OPNs) 用于染料吸附.
- 为了评估OPNs对cationic染料的吸附性能.
- 为了研究吸附动力学和异温,并评估吸附剂的可重复使用性.
主要方法:
- 用KMnO4.4氧化松针进行了氧化.
- 合成的氧化松针 (OPNs) 使用各种技术进行了表征.
- 吸附实验使用马拉绿 (MG) 和甲蓝 (MB) 染料进行.
- 应用了动力和等温模型 (伪第一阶,伪第二阶,埃洛维奇,兰格穆尔,弗朗德利希,特姆金).
主要成果:
- 在120分钟内,OPNs对阴离子染料具有很高的选择性,MG的去除率为96.11%,MB的去除率为89.68%,MG的去除率为96.11%.
- 吸附遵循伪二次运动模型和兰格穆尔等温模型.
- 最大吸附能力 (q_m) 为MG的223.2 mg/g和MB的156.9 mg/g.
- 在9个吸附-脱吸周期中,OPN表现出极好的再生和可回收性.
结论:
- 氧化松针 (OPNs) 是一种有效,低成本和可持续的吸附剂,用于从废水中去除阴阳性染料.
- 该材料的高吸附能力,选择性和可重复使用性使其成为环境修复的有希望的解决方案.
- 这项研究突出了利用农业废物开发高效水处理技术的潜力.
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