通过Mn_2.7Al_0.3O₄吸附剂消除致癌离子的非线性动力学,同热和热力学方法

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Lakshmi Narayani R¹, Malathi Challa², Archna Narula³

¹Department of Chemistry, M S Ramaiah Institute of Technology (Affiliated to VTU), Bangalore-54, India.

Scientific reports

|December 4, 2025

概括

一种新的纳米双金属氧化物吸附剂,Mn2.7Al0.3O4,有效地从水中去除致癌 (Cd(II)) 和 (Pb(II)) 离子. 这种材料具有很高的吸附能力和自发的外热去除,使其适合废水处理.

科学领域:

材料科学材料科学材料科学
环境化学环境化学
纳米技术纳米技术

背景情况:

致癌重金属离子如 (Cd) 和 (Pb) 对水生生态系统和人类健康构成重大风险.
开发高效且具有成本效益的吸附剂对于从废水中去除这些有毒离子至关重要.

研究的目的:

通过将Alundum整合到豪斯曼尼特中,合成一个纳米双金属氧化物吸附剂Mn2.7Al0.3O4.
为了研究Alundum和豪斯曼尼特对致癌离子吸附的协同作用.
评估合成吸附剂对Cd (II) 和Pb (II) 离子的吸附性能和机制.

主要方法:

通过将Alundum整合到豪斯曼尼特中合成Mn2.7Al0.3O4.
使用粉末X射线微波测量 (PXRD) 和扫描电子显微镜 (SEM) 进行表征.
使用Brunauer-Emmett-Teller (BET) 分析,动力学 (伪二阶),异温 (Langmuir,Sips) 和热力学模型的吸附研究.

主要成果:

合成的材料Mn2.7Al0.3O4证实了四角形结构和血小板形态.
BET分析揭示了一种中孔结构,表面积为1.968 m2/g,平均孔径为35.8 nm.
获得了高吸附能力:Cd{\displaystyle Cd{\displaystyle Cd{\displaystyle II}) 的174.6 mg/g和Pb{\displaystyle Pb{\displaystyle II}) 的75.4 mg/g,遵循的是伪二次动力学.
热力学研究表明Cd (II) 和Pb (II) 离子的自发和外热吸附过程.

结论:

纳米双金属氧化物吸附剂Mn2.7Al0.3O4在去除致癌性Cd (II) 和Pb (II) 离子方面表现出卓越的效率.
该材料的高吸附能力,自发性和易于回收使其成为废水处理应用的有希望的候选者.
阿隆德和豪斯曼尼特的协同整合有助于提高吸附性能.

关键词:

吸附方式吸附方式吸附方式双金属 Mn2.7Al0.3O4 的吸附剂.有致癌性的金属离子.非线性动力学和异热学.热力学研究热力学研究.

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