Sustainable Zero-Valent Metal (ZVM) Water Treatment Associated with Diffusion, Infiltration, Abstraction, and Recirculation

摘要: Socio-economic, climate and agricultural stress on water resources have resulted in increased global demand for while at the same time proportion of potential which are adversely affected by sodification/salinisation, metals, nitrates, organic chemicals has increased. Nano-zero-valent metal (n-ZVM) injection or placement aquifers offers a partial solution. However, n-ZVM application results substantial reduction aquifer permeability, turn can reduce amount that be abstracted from aquifer. This study using static diffusion continuous flow reactors containing m-ZVM (ZVM filaments, filings punchings) established use does not result permeability. The experimental used to design model treatment programs an (using recirculation diffusion). They also provide predictive quality associated with specific abstraction rates infiltration/injection into demonstrates requires 1% weight required rate. It is observed 1 t Fe0 will process 23,500 m3 infiltrating water. able remove >80% nitrates flowing adjust composition (by reduction) optimize removal metals compounds. experiments demonstrate ZVM groundwater salinity 20 –> 45% remediation program designed desalinate Modeling indicates widespread may socio-economic, resources. rate oxygen formation during [by (Fe0, Al0 Cu0)] controls pH, Eh degree occurs.