Influence mechanism of low concentration humic acid on physical clogging in porous media during artificial recharge
ZHAO Mingmin
SUN Jie
YAN Ni
ZHENG Xilai
LI Xin
Abstract：Suspended soils(SS)are the main factor causing physical clogging during artificial recharge.Dissolved organic matter(DOM)exists widely in recharge water and aquifer.It is of great scientific significance and application value to study the influence of DOM on physical clogging.One-dimensional seepage simulation experiments were used to explore the influence of low concentration(1 mg C/L)hu-mic acid(HA),a representative DOM,on the transport and deposition behavior of SS in porous media,and on the physical clogging during artificial recharge.Scanning electron microscopy(SEM),Fourier transform infrared spectroscopy(FTIR),X-ray photoelectron spectroscopy(XPS),and dy-namic light scattering(DLS)were used to reveal the influence mechanism of HA on physical clogging in porous media.The results showed that after adding HA,the transportability of SS was enhanced,the deposition amount of SS was reduced,and the physical clogging in porous media was inhibited.When HA was adsorbed on the surface of kaolinite,the steric hindrance effect between kaolinite was enhanced,and then the agglomeration between kaolinite was reduced,thus enhancing the dispersion stability of kaolinite.
Keywords：artificial rechargecloggingkaolinitehumic acidspectral analysisdynamic light scatter-ing
Publication Date：2025-06-30
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：9( 81-89 )