Environment

Advanced groundwater remediation : active and passive by McDonald, Chris; Meggyes, T.; Simon, Franz-Georg

By McDonald, Chris; Meggyes, T.; Simon, Franz-Georg

This ebook includes a choice of the main updated study on reactive obstacles and pump-and-treat, with the main target on heavy steel removing. After facing normal problems with groundwater remediation utilizing lively and passive approaches, remediation engineering perform is mentioned with an emphasis on heavy steel remediation, sorption kinetics ...

summary: This booklet features a collection of the main updated study on reactive limitations and pump-and-treat, with the focus on heavy steel removing. After facing basic problems with groundwater remediation utilizing lively and passive techniques, remediation engineering perform is mentioned with an emphasis on heavy steel remediation, sorption kinetics

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1995; Sivavec, 1996). Other researchers (Johnson and Tratnyek, 1995) have discussed the precipitation products siderite (FeCO3), goethite (FeOOH) and ‘green rust’ (Fe2(OH)4Cl·nH2O), depending on the composition of the groundwater. In column experiments in laboratory studies it was observed that the permeability was decreased by the precipitates (Sivavec, 1996). However, in pilot-scale and full-scale installations the function was not impaired by precipitation reactions. Redox reactions occur spontaneously if the sum of the potentials of the two half-reactions is positive.

The cost saving was around 50–70% over the long term for the example discussed in the report, as can be seen in Fig. , 1999). In this comparison, barrier maintenance costs of US $268 000 every 10 years were adopted. This was equivalent to 25% of the iron medium costs, and was little more than a good guess because no long-term experience with PRBs exists. It is thus uncertain whether or not such cost savings can be achieved. Further research is urgently needed into the long-term behaviour of PRBs using accelerated testing methods.

1992). In situ modification of an aquifer material by a cationic surfactant to enhance retardation of organic contaminants. Journal of Contaminant Hydrology 10, 325–337. CANTRELL, K. , KAPLAN, D. I. and GILMORE, T. J. (1997). Injection of collodial size particles of Fe0 in porous media with shearthinning fluids as a method to emplace a permeable reactive zone. Proceedings of the International Containment Technology Conference, St Petersburg, Florida, pp. 774–780. CHEN, X. B. and WRIGHT, J. V. (1997).

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