Research on the Influence of Bentonite Waterproof Blanket on Anti-Seepage Performance in Zhangjiakou Liuchuanhe River Channel Remediation
With the advancement of industrial technology and the development of social economy in China,a large amount of metal wastewater has been generated during engineering implementation,causing significant environmental damage.In order to further understand the impact of heavy metal ions on the anti-seepage effect of bentonite waterproof blankets in river channels,this paper relies on the dredging project of rivers in Zhangjiakou,Hebei Province.It comparatively analyzes the influence of different types of metal ions and ion concentrations on the anti-seepage effects of traditional needle-punched GCL(Geosynthetic Clay Liner)and self-made HDP(High Density Polyethylene)GCL.The research results indicate that among different types of ion solutions,the most penetrating effect is observed in Cu2+solution,followed by Zn2+solution,and the least is observed in Pb2+solution.Leakage occurs in 4mm and 7mm thick HDP GCL only when the ion solution concentration exceeds 1g/L.Additionally,the anti-seepage ability of 7mm HDP GCL is superior to that of 4mm HDP GCL and traditional needle-punched GCL,indicating that the key factor affecting the anti-seepage performance of HDP GCL is thickness.
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