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FIELD DEMONSTRATION OF ENHANCED REMOVAL OF CHLORINATED SOLVENTS IN GROUNDWATER USING BIOCHAR-SUPPORTED NANOSCALE ZERO-VALENT IRON
Qian, L., Y. Chen, D. Ouyang, W. Zhang, L. Han, J. Yan, P. Kvapil, and M. Chen.
Science of the Total Environment 698:134215(2019)
Biochar-supported nanoscale zero-valent iron (biochar-nZVI) was successfully injected into groundwater at a site impacted by chlorinated solvents in the North China Plain. A two-step injection process was implemented using direct-push and water pressure-driven packer techniques to overcome the significant shortcomings of nZVI agglomeration for in situ groundwater remediation. The demonstration revealed a sharp chlorinated solvent concentration reduction in 24 h following the first injection of nZVI but concentrations rebounded within two weeks. Biochar-nZVI application greatly enhanced chlorinated solvent removal in groundwater over 42 days. Increases in ferrous iron and chloride concentrations after the injections indicated that the reduction has occurred during the removal of chlorinated solvents in groundwater.
Science of the Total Environment 698:134215(2019)
Biochar-supported nanoscale zero-valent iron (biochar-nZVI) was successfully injected into groundwater at a site impacted by chlorinated solvents in the North China Plain. A two-step injection process was implemented using direct-push and water pressure-driven packer techniques to overcome the significant shortcomings of nZVI agglomeration for in situ groundwater remediation. The demonstration revealed a sharp chlorinated solvent concentration reduction in 24 h following the first injection of nZVI but concentrations rebounded within two weeks. Biochar-nZVI application greatly enhanced chlorinated solvent removal in groundwater over 42 days. Increases in ferrous iron and chloride concentrations after the injections indicated that the reduction has occurred during the removal of chlorinated solvents in groundwater.
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