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对于Pb的不同性能: (II) 在现场形成的Fe的吸附 (III) 来自酸盐的氧化水氧化物 (VI) 减少和铁的氧化
Bingyan Lan1,2, Chenhui Hao1,2, Mengze Zhang1,2
1School of Environment, South China Normal University, Higher Education Mega Center, Guangzhou, 510006, People's Republic of China.
概括
在现场形成的铁氧化 (FeOx) 从铁酸盐减少 (FeOx-FeVI) 显示优越的去除与那些来自铁氧化 (FeOx-FeII) 相比. FeOx-FeVI提供更高的吸附能力和8倍更快的运动速率去除.
科学领域:
- 环境化学环境化学
- 材料科学 材料科学 材料科学
- 水处理 处理水的方法
背景情况:
- 铁氧化 (FeOx) 在环境修复中至关重要.
- 了解现场形成机制是优化重金属去除的关键.
- 酸盐还原和铁氧化是产生FeOx的两个不同的途径.
研究的目的:
- 为了比较FeOx通过铁酸盐还原 (FeOx-FeVI) 和铁氧化 (FeOx-FeII) 形成的FeOx的特性和 (Pb(II)) 吸附性能.
- 阐明粒子形态和表面化学对Pb (II) 吸附机制的影响.
- 提供关于现场铁氧化氧化物颗粒制造的见解,以加强重金属的去除.
主要方法:
- 通过铁酸盐还原和铁氧化合成FeOx.
- 使用FTIR,SEM,SAXS和XPS进行表征.
- 吸附性研究包括朗格穆尔建模和Pb (II) 除去的动力分析.
主要成果:
- FeOx-FeVI具有比FeOx-FeII (810.37 mg/g Fe) 更高的理论最大吸附能力 (929.54 mg/g Fe).
- 用FeOx-FeVI去除Pb(II) 的速度在pH值为6时快8倍.
- FeOx-FeVI具有较小,更同质的颗粒,聚合度较低,基-Fe聚合物更具反应性,促进了更大的Pb(II) 访问和复杂化.
结论:
- 在现场形成的FeOx-FeVI由于其独特的粒子形态和表面特性,在Pb(II) 清除方面表现出卓越的性能.
- 制造方法对FeOx结构产生重大影响,影响吸附点的可访问性和重金属结合机制.
- 这项研究提供了宝贵的见解,以定制现场氧化氧化铁的合成,以实现高效的环境修复.
关键词:
吸附方式 吸附方式 吸附方式铁 (Fe) (II) /H2O2 (二氧化) 的使用情况.铁酸盐 (VI) 的使用在现场形成的Fe(III) 氧化氧化.领导 领导 领导 领导 领导聚合方式的聚合.更多相关视频
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