CAJ | 학술논문

利用羧甲基纤维素钠（CMC）对零价铁进行改性，通过 Zeta 电位、粒型粒度和沉降曲线的变化探讨改性剂添加量影响零价铁分散的机理，同时考察改性剂添加量、流速和多孔介质类型对零价铁迁移的影响。结果表明，CMC 对零价铁的分散机理符合 DLVO 模型，静电空间位阻带来的势垒增加量与 CMC 添加量成正相关，能促进零价铁的分散；经500%CMC（CMC 与零价铁的质量比）改性的零价铁分散性能最好，成颗粒状、吸光度在90 min 下降31%。受零价铁与石英砂作用能、填充介质的吸附位点和剪切力的影响，零价铁的迁移能力随着 CMC 添加量的增多，填充介质粒径的增大和流速的增加而增强。
이용최갑기섬유소납（CMC）대령개철진행개성，통과 Zeta 전위、립형립도화침강곡선적변화탐토개성제첨가량영향령개철분산적궤리，동시고찰개성제첨가량、류속화다공개질류형대령개철천이적영향。결과표명，CMC 대령개철적분산궤리부합 DLVO 모형，정전공간위조대래적세루증가량여 CMC 첨가량성정상관，능촉진령개철적분산；경500%CMC（CMC 여령개철적질량비）개성적령개철분산성능최호，성과립상、흡광도재90 min 하강31%。수령개철여석영사작용능、전충개질적흡부위점화전절력적영향，령개철적천이능력수착 CMC 첨가량적증다，전충개질립경적증대화류속적증가이증강。
The dispersion mechanism of carboxymethyl cellulose (CMC) modified zero-valent iron (ZVI) particles in quartz sand was studied. Influences of porous medium,flow rate on transport were also investigated. The results showed that dispersion mechanism of CMC modified ZVI particles followed the DLVO model. Potential barrier increment brought by electrostatic repulsion and steric hindrance had positive correlation with CMC concentration,promoting the dispersion of ZVI. Zero valent iron particles modified with 500% CMC (mass ratio of CMC to ZVI) were fully dispersed as observed from SEM and light absorbance decreased by 31% in 90 minutes. Influenced by interaction energy between ZVI and quartz sand,filling medium adsorption sites and shear force,transport ability had positive correlation with CMC dosage,and increased with bigger medium size and higher fluid velocity.