Reactive wall

The vendor states that iron reactive walls installed by vertically oriented hydraulic fracture technology would have lower materials and installations costs than conventional funnel and gate systems (D176958, p. 7). 

Cantrell, K. (1996). A permeable reactive wall composed of clinoptilolite for containment of... 

Palmer PL. Reactive walls. In Nyer EK, Kidd DF, Palmer PL, Crossman TL, Fam S, Johns FJ II, Boettcher G, Suthersan SS, eds. In Situ Treatment Technology. Boca Raton, FL CRC, 1996 271-288. 

Blowes DW, Ptacek CJ, Lambor IL. In-situ remediation of Cr(VI)-contaminated groundwater using permeable reactive walls laboratory studies. Environ Sci Technol 1997 31 3348-3357. 

To increase the pH of the acid mine drainage from the exercise in chapter 3.1.6.2 a reactive wall of 1 m thick calcite (density of calcite = 2500 kg/m3) shall be installed within the aquifer. Thickness and permeability of the wall are chosen in a way that a 50 % saturation of lime in the aquifer can be reached with a daily percolation of 500 L/m2. 

Benner S. G., Blowes D. W., and Ptacek C. J. (1997) A full-scale porous reactive wall for prevention of acid mine drainage. In Ground Water Monitoring and Remediation, Fall, vol. 17(4), pp. 99-107. 

Cocos I. A., Zagury G. L, Clement B., and Samson R. (2002) Multiple factor design for reactive mixture selection for use in reactive walls in mine drainage treatment. Water Res. 32, 167-177. 

M. J. Baker, D. W. Blowes and C. J. Ptacek, Phosphorous Adsorption and Precipitation in a Permeable Reactive Wall Applications for Wastewater Disposal Systems, Land Contam. Reclam.,... 

G. Teutsch, J. Tolksdorff and H. Schad, The Design of In Situ Reactive Wall Systems—A Combined Hydraulic-Geotechnical-Economic Simulation Study, Land Contam. Reclam., 1997,5,... 

FIGURE 7.8 HoUow fiber with Inlet plane reactive walls containing the supported carrier. 

FIGURE 8.4 Schematic of steady-state laminar flow in a tube with reactive walls. 

Figure 4.15 The schematic showing the development of viscons and diffnsion boundary layers over a reactive wall surface...

The remediation of the environmental effects of mine drainage include collection and treatment of waters using conventional treatment facilities, passive downstream treatment involving constructed wetlands or a porous reactive wall. Controls on sulphide oxidation include the mantling of sulphides, oxygen-diffusion barriers and use of bactericides. Source and migration controls are the preferred option but source control particularly is very difficult to achieve. 

Another means to promote in situ abiotic transformation is the construction of a reactive wall, physically similar to a slurry wall but with a porous backfill, containing chemical reactants, through which contaminated groundwater can flow. One such reactant, often referred to as zero-valent iron, is made up of fine particles of elemental (metallic) iron. Reactions between elemental iron and some dissolved chlorinated solvents, for example, can result in dechlorination of the solvents to species that are more susceptible to subsequent biodegradation. 

Reactive Surface Permeable Surface Reactive Wall... 

Batch (compacted, suspensions, reactive walls ) Passing through systems (diffusion or flow through membranes or columns)... 

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