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通过Fe-Mn二元氧化物/骨炭同时从水中去除Sb (III) 和Cd (II) 的性能和机制

Xiaolin Han^1,2, Congyu Cheng^1,2, Wei Zhang^3,4,5

¹State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control On Chemical Process, School of Resources and Environmental Engineering, East China University of Science and Technology, 130 Meilong Road, Xuhui District, Shanghai, 200237, China.

Environmental science and pollution research international

|June 27, 2023

概括

一种新的铁二氧化物 (FMBO) /骨炭复合物 (FMBC) 有效地同时从水中去除 (Sb) 和 (Cd). 复合材料显示了增强的吸附能力和地下水修复的潜力.

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:

反 (Sb (III)) 和 (Cd (II)) 是有毒的重金属,对水生生态系统和人类健康构成重大风险.
同时去除多种污染物对于有效的水资源整治至关重要.
骨炭是一种低成本的生物材料,具有吸附性去除污染物的潜力.

研究的目的:

为了合成和表征一种新的Fe-Mn二氧化物 (FMBO) /骨炭复合物 (FMBC).
评估FMBC从水溶液中同时吸附Sb (III) 和Cd (II) 的情况.
研究吸附机制和各种因素对去除效率的影响.

主要方法:

通过将FMBO加载到骨炭上来合成FMBC.
使用扫描电子显微镜,X射线衍射和能量分散光谱学进行表征.
批量吸附实验,以评估在不同条件下 (pH,离子强度,温度,共存物质) 的Sb (III) 和Cd (II) 去除.

主要成果:

在FMBC中,Sb (III) 和Cd (II) 具有显著的同时吸附.
存在Cd (II) 显著提高了Sb (III) 的吸附能力,达到209.0 mg/g.
在广泛的pH范围 (2-7),观察到有效的去除,确定了包括氧化还原,静电相互作用,表面复杂化,离子交换和沉的机制.
(III) 促进了Sb (III) 的氧化,FeOOH充当了吸附点,酸 (hydroxyapatite) 促进了Cd (II) 的去除.

结论:

FMBC是一种高效且具有成本效益的吸附剂,可同时去除Sb (III) 和Cd (II).
在Cd (II) 和Sb (III) 吸附之间的协同效应提高了整体去除效率.
FMBC显示出有前途的应用潜力,用于修复共同污染的地下水.

关键词:

吸附方式吸附方式吸附方式它们是反的.骨质炭是指骨质炭的部分.是的组成部分.铁Mn二元氧化物 Mn二元氧化物

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