The attachment-detachment mechanism of ionic/nanoscale/microscale substances on quartz sand in water
The attachment-detachment mechanism of ionic/nanoscale/microscale substances on quartz sand in water
复制标题
离子/纳米/微米尺度物质在水中石英砂上的附着-脱离机理
DOI：
10.1016/j.powtec.2021.09.051
复制
发表时间：
2021-09-27
影响因子：
5.2
通讯作者：
Hou, Jianpeng
中科院分区：
文献类型：
--
作者：
Bai, Bing;Nie, Qingke;Hou, Jianpeng
研究了水中重金属离子和悬浮物（如铜离子（Cu2+）、氧化石墨烯（GO）和二氧化硅粉）在石英砂多孔介质（SiO2颗粒）上的吸附-脱附行为。实验结果表明，吸附-脱附过程可用非线性模型描述。脱附曲线呈一组平行扫描曲线。对于铜离子、GO和二氧化硅粉末（从离子到颗粒），附着/脱离曲线的范围从线性到非线性。最后，建立了统一的静态附着-脱离模型。吸附机理主要涉及SM与固体基质之间的界面静电吸引、金属键的形成和方向调节以及不同材料的互补分子结构特征。随着温度的升高，Cu~（2+）、GO和SiO_2粉末的不规则运动明显增强。(C)2021爱思唯尔有限公司版权所有。
The attachment-detachment of heavy metal ions and suspended matter (SM), such as copper ions (Cu2+), graphene oxide (GO) and silica powders, onto a quartz sand porous medium (SiO2 particles) in water was investigated. The experimental results showed that the attachment-detachment process can be described by a nonlinear model. The detachment curves appeared as a group of parallel scanning curves. The attachment/detachment curves ranged from linear to nonlinear for copper ions, GO and silica powders (ranging from ions to particles). Finally, a unified static attachment-detachment model was established. The attachment mechanism mainly involved the interfacial electrostatic attraction between SM and the solid matrix, the formation and directional adjustment of metal bonds, and the complementary molecular structure characteristics of the different materials. The irregular motions of Cu2+, GO and silica powder were significantly enhanced by increasing the temperature. (C) 2021 Elsevier B.V. All rights reserved.