用EDAC修改的奇托/伊米达-多硫复合珠,用于从水溶液中去除Cr (VI)
Xiaojie Zhang1, Kangrui Ma1, Liqin Zhao1
1Hubei Key Laboratory of Bioinorganic Chemistry & Materia Medica, Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, PR China.
International journal of biological macromolecules
|August 21, 2024
概括
开发了一种新型的基托衍生物 (CSEC) 和复合珠 (CSEP) 来从酸性废水中去除Cr (VI). CSEP表现出增强的稳定性和抗离子干扰的性能,显示了废水处理的潜力.
科学领域:
- 材料科学 材料科学 材料科学
- 环境化学环境化学
- 聚合物科学 聚合物科学
背景情况:
- 在酸性Cr (VI) 污染的废水中,奇多的不稳定性和吸附限制阻碍了其应用.
- 开发强大高效的吸附剂对于有效的重金属整治至关重要.
研究的目的:
- 为了合成和表征一种新的EDAC修饰EDTA交联奇托衍生物 (CSEC).
- 准备一个复合珠 (CSEP) 的CSEC和imidazolium-functionalized多硫 (IMPSF),以提高机械强度和分离.
- 评估Cr (VI) 吸附性能和CSEC和CSEP在酸性废水中的去除机制.
主要方法:
- 使用奇托,1-乙基-3-(3-二甲基亚胺) 碳二胺化 (EDAC) 和Na2EDTA的CSEC的一合成.
- 阶段逆转方法制备CSEP复合珠,其中包括CSEC和imidazolium功能化多硫 (IMPSF).
- 使用FESEM,FTIR,NMR和XPS进行表征;吸附研究以确定容量,动力学和机制.
主要成果:
- 在pH3.3下,CSEC和CSEP的最大Cr (VI) 吸附能力分别为145.96和135.82毫克g-1.
- CSEC和CSEP的平衡时间分别为5分钟和8小时.
- 与CSEC相比,CSEP显示出明显增强的抵抗力与共存的离子干扰.
- 对这两种材料来说,吸附过程是外热和自发的.
结论:
- 合成的CSEC和CSEP是从酸性废水中去除Cr (VI) 的有效吸附剂.
- CSEP表现出优越的机械强度和对干扰离子的抗性,使其成为实际应用的有希望的候选者.
- 移除机制涉及静电吸引和与各种离子的潜在氧化还原反应.
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