Chromium removal from aqueous solution by a PEI-silica nanocomposite.
Chromium removal from aqueous solution by a PEI-silica nanocomposite.
复制标题
通过PEI-SILICA纳米复合材料从水溶液中去除铬。
DOI：
10.1038/s41598-018-20017-9
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发表时间：
2018-01-23
影响因子：
4.6
通讯作者：
Choi JW
中科院分区：
文献类型：
--
作者：
Choi K;Lee S;Park JO;Park JA;Cho SH;Lee SY;Lee JH;Choi JW
在利用吸附技术去除废水中有毒重金属时，确定吸附机理和去除效率是至关重要的。本研究主要探讨硅基纳米粒子对铬的去除效果及去除机理。PEI-二氧化硅纳米颗粒通过一锅法技术合成，并且在二氧化硅颗粒中表现出均匀良好分散的PEI聚合物。铬离子的吸附容量通过分批吸附试验测定，PEI-二氧化硅纳米颗粒具有183.7mg/g的值和单层吸附。铬离子的吸附受溶液pH值的影响，并改变了纳米粒子表面的化学。对Cr和N的相关吸附构型和XPS峰的吸附能的第一性原理计算表明，Cr（VI），[HCrO4] −被胺基还原为两种物质，Cr（III），CrOH 2+和Cr3+，并且Cr（III）和Cr（VI）离子被吸附在不同的官能团上，氧化的N和NH3+。
It is essential and important to determine the adsorption mechanism as well as removal efficiency when using an adsorption technique to remove toxic heavy metals from wastewater. In this research, the removal efficiency and mechanism of chromium removal by a silica-based nanoparticle were investigated. A PEI-silica nanoparticle was synthesized by a one-pot technique and exhibited uniformly well-dispersed PEI polymers in silica particles. The adsorption capacity of chromium ions was determined by a batch adsorption test, with the PEI-silica nanoparticle having a value of 183.7 mg/g and monolayer sorption. Adsorption of chromium ions was affected by the solution pH and altered the nanoparticle surface chemically. First principles calculations of the adsorption energies for the relevant adsorption configurations and XPS peaks of Cr and N showed that Cr(VI), [HCrO4]− is reduced to two species, Cr(III), CrOH2+ and Cr3+, by an amine group and that Cr(III) and Cr(VI) ions are adsorbed on different functional groups, oxidized N and NH3+.
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影响因子：
8.6
作者：
Ghiaci, M;Kia, R;Seyedeyn-Azad, F
通讯作者：
Seyedeyn-Azad, F
影响因子：
3.7
作者：
Kresse, G;Furthmuller, J
通讯作者：
Furthmuller, J
影响因子：
9.5
作者：
Islam, Md. Shahinul;Choi, Won San;Lee, Ha-Jin
通讯作者：
Lee, Ha-Jin
影响因子：
5.6
作者：
Krishna, BS;Murty, DSR;Prakash, BSJ
通讯作者：
Prakash, BSJ
影响因子：
22.1
作者：
Cheng, Qian;Wang, Chengwei;Chan, Candace K.
通讯作者：
Chan, Candace K.