Organic substances infiltration system

Adsorption of Metal Ions and Ligands. The sohd—solution interface is of greatest importance in regulating the concentration of aquatic solutes and pollutants. Suspended inorganic and organic particles and biomass, sediments, soils, and minerals, eg, in aquifers and infiltration systems, act as adsorbents. The reactions occurring at interfaces can be described with the help of surface-chemical theories (surface complex formation) (25). The adsorption of polar substances, eg, metal cations, M, anions. A, and weak acids, HA, on hydrous oxide, clay, or organically coated surfaces may be described in terms of surface-coordination reactions ... 

Fig. 4.21 gives mean values for some organic substances in the Glatt infiltration system. The figure illustrates that tetrachlorethylene is not eliminated during the infiltration process. In the case of 1,4-dichlorbenzene and 1,3-dimethylbenzene (m-xylene) elimination occurs but this elimination is caused by biodegradation. 

Table 4.7 Estimated mean Retardation Factors for Organic Substances in the River-Groundwater Infiltration System of the Glatt River (Modified from Schwarzenbach et al., 1983)...

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