Combined in-situ bioremediation treatment for perchlorate pollution in the vadose zone and groundwater

Hazardous wastes treatment technologies

“…The two‐step process, oxidation and adsorption, effectively removed As(III) from groundwater. Levakov, Ronen, and Dahan (2019) studied the removal of perchlorate by recharging the groundwater to the shallow soil amended with an electron donor. Perchlorate was reduced in the shallow soil and treated water percolated to the water table.…”

Vadose Zone Monitoring as a Key to Groundwater Protection

“…The potential for in-situ monitoring of the unsaturated zone has been demonstrated through several studies where the VMS was used to measure flow velocities, solute transport, and chemical transformation of contaminants across the unsaturated zone. It has been implemented in a variety of studies on water flow and contaminant transport including: (a) rainwater infiltration and groundwater recharge (Rimon et al, 2007(Rimon et al, , 2011a, (b) floodwater infiltration from stream channels and reservoirs (Shani, 2006;Dahan et al, 2007Dahan et al, , 2008Dahan et al, , 2009, (c) impact of agricultural practices on groundwater quality (Baram et al, 2012;Dahan et al, 2014;Turkeltaub et al, 2015bTurkeltaub et al, , 2016Weissman et al, 2020), (d) leachate generation and migration in landfills (Aharoni et al, 2017(Aharoni et al, , 2020, and (e) interactive remediation of contaminated sites (Dahan et al, 2017;Moshkovich et al, 2017;Levakov et al, 2019). Scientific and environmental implications from a number of these studies are presented here to demonstrate the capability to continuously monitor water flow and contaminant migration in the unsaturated zone.…”

“…In-situ bioremediation of a contaminated unsaturated zone depends mainly on the ability to control the hydrological, physical, and chemical conditions in the subsurface. Application of vadose zone monitoring technology during a remediation operation enables optimizing the remediation strategy on the basis of real-time data on the unsaturated zone's chemical composition, saturation degree, and flow characteristics (Avishai et al, 2017;Dahan et al, 2017;Moshkovich et al, 2017;Levakov et al, 2019). Direct information from the unsaturated zone was used for real-time adjustment of water application cycles, nutrient augmentation, and supply of electron donors/acceptors to the treated soil.…”

Key Technologies and Equipment for Contaminated Surface/Groundwater Environment in the Rural River Network Area of China: Integrated Remediation

“…However, some factors in terms of the treatable pollutants, cost considerations, cleanup e ciency, and secondary contamination, have become limitations to the successful remediation of the contaminated sites. Therefore, in recent years, the combination of pump-treat with other alternative technologies has been proposed, such as chemical oxidation processes and bioremediation, to enhance the removal e ciency and lower the operational cost (Baciocchi et al, 2014;Levakov et al, 2019). Some novel techniques have also been developed by integrating conventional treatments with modern technologies, such as nanomaterial technology (Pak et al, 2019).…”