使用NH2-MIL-125(Ti) 来有效地从水溶液中去除Cr(VI) 和RhB:二进制系统中的竞争和合作行为
Lei Zheng1, Lixia Sun1, Jiangbo Qiu1
1School of Environmental and Civil Engineering, Jiangnan University, Wuxi 214122, China.
Journal of environmental sciences (China)
|November 3, 2023
概括
NH2-MIL-125 (Ti) 有效地吸附存在的污染物,如六价 (Cr (VI)) 和罗达胺B (RhB). 这些污染物之间的相互作用增强了RhB去除,为水处理提供了好处.
科学领域:
- 环境化学环境化学
- 材料科学 材料科学 材料科学
背景情况:
- 同时存在的无机和有机污染物对有效的水处理构成重大挑战.
- 开发高效的吸附剂,同时去除各种污染物对于现实应用至关重要.
研究的目的:
- 研究NH2-MIL-125(Ti的吸附行为,用于单次和同时去除六价 (Cr(VI)) 和罗达胺B (RhB).
- 探索污染物相互作用对吸附能力和动力学的影响.
主要方法:
- 吸附实验使用NH2-MIL-125 ((Ti) 进行了Cr ((VI) 和RhB单独和一起的吸附.
- 优化了包括反应时间,初始度,温度和pH在内的关键参数.
- 吸附动力学和异热量分别使用伪二阶和朗迈尔模型进行分析.
- 进行了热力学研究,以了解吸附过程的自发性和性质.
主要成果:
- NH2-MIL-125 (Ti) 证明了对Cr (VI) 和RhB的有效吸附,由伪二阶动力学和兰格穆尔等热量学描述得很好.
- 吸附是自发的和内热的.
- 在二进制系统中,随着RhB的增加,Cr(VI) 的吸附能力下降,而RhB的吸附能力显著增加.
- 在存在100 mg/L Cr (VI) 的情况下,RhB的清除率达到了97.58%.
- 形成Cr (VI) -RhB和Cr (III) -RhB复合体促进了RhB吸附.
结论:
- 二元系统中的污染物相互作用可以导致协同效应,增强特定污染物的去除.
- NH2-MIL-125 (Ti) 显示出作为处理含有无机和有机污染物的复杂废水的吸附剂的潜力.
- 了解污染物相互作用是设计先进水处理策略的关键.
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