By McDonald, Chris; Meggyes, T.; Simon, Franz-Georg
This publication encompasses a collection of the main up to date examine on reactive obstacles and pump-and-treat, with the focus on heavy steel removing. After facing basic problems with groundwater remediation utilizing lively and passive tactics, remediation engineering perform is mentioned with an emphasis on heavy steel remediation, sorption kinetics ...
summary: This publication features a choice of the main up to date examine on reactive boundaries and pump-and-treat, with the main target on heavy steel removing. After facing common problems with groundwater remediation utilizing lively and passive strategies, remediation engineering perform is mentioned with an emphasis on heavy steel remediation, sorption kinetics
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Additional info for Advanced groundwater remediation : active and passive technologies
G. for transition metal cations such as Pb2+. g. hexadecyltrimethylammonium, HDTMA, (C16H33)((CH3)3N+) the zeolites can remove non-ionic organic compounds such as benzene and chlorinated hydrocarbons, due to the organic carbon content of the modified sorbent, without lowering the sorption affinity for metal ions (Haggerty and Bowman, 1994). Negatively charged oxyanions such as chromates are sorbed via ion exchange by the cationic surfactant (Bowman, 1999). The organo-zeolite is also applicable for the removal of other oxyanions such as selenate and sulfate.
In aerobic systems, oxygen is a preferred oxidant for iron, leading to rapid corrosion: O2 + 2H2O + 4e– Æ 4OH– (8) Dissolved oxygen is rapidly consumed at the entrance of an iron-bearing barrier (reaction (8)). , 1995). The effect of other microbiological and geochemical processes on the long-term performance of barriers with zero-valent iron was studied by Gu et al. (1999). According to their results, the function of the walls could be impaired by the accumulation of iron hydroxides, carbonates and sulfides due to decreased permeability and reactivity.
1988). Dichtwandtechnik für seitliche Umschliessungen. Bauwirtschaft 110(B42), 831–835. BEITINGER, E. (1998). Permeable Treatment Walls – Design, Construction and Costs, NATO/CCMS Pilot Study. Evaluation of Demonstrated and Emerging Technologies for the Treatment of Contaminated Land and Groundwater (Phase III). 1998 Special Session. Treatment Walls and Permeable Reactive Barriers, Vol. 229, pp. 6–16. North Atlantic Treaty Organization, Vienna. BEITINGER, E. and BÜTOW, E. (1997). Konstruktive und herstellungstechnische Anforderungen an unterirdische, durchströmte Reinigungswände zur in-situ Dekontamination.