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In order to study the solidification characteristics of heavy metals in different matrices, this paper intends to study the migration and distribution characteristics of heavy metals such as Cd, Cr, Pb, Zn, Cu in different matrix ratios of wetland systems. The vertical subsurface flow process (bean stone+gravel hollow brick) matrix, horizontal subsurface flow process (sand+slag+crushed hollow brick) matrix has better accumulation effect on Zn; vertical subsurface flow process (bean stone + gravel) matrix has more cumulative effect on Pb Good; the accumulation effect of Cu and Cr on different substrates is not obvious; the accumulation effect of horizontal subsurface flow treatment unit (sand + slag + gravel) on Cd is better than that of (sand + slag + gravel hollow brick) matrix. The content of Cd, Cr, Pb and Zn in the matrix of vertical subsurface flow (bean stone+gravel) is significantly correlated with the distance along the path. The content of Cd, Pb and Zn in the matrix of (bean stone+gravel hollow brick) is related to the distance along the path; the content of Cd, Cr, Zn in the horizontal subsurface flow process (sand+slag+gravel) matrix is significantly correlated with the distance along the path, (sand + slag + gravel hollow brick) matrix, (bean stone+slag) matrix Cr The content of Cu, Pb and Zn is significantly correlated with the distance along the path. The content of Pb and Zn in the matrix of sand (gravel + gravel) is significantly correlated with the distance along the path.

Study on the Migration of Heavy Metals in Different Substrates of Wetland System