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Magnesium deterioration and lead stabilization/solidification using the toxicity characteristic leaching procedure
Author(s) -
Nicklaus Laura E.,
Caffaro Mariana A.,
Fuessle Robert W.,
Taylor Max A.
Publication year - 2014
Publication title -
environmental progress and sustainable energy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.495
H-Index - 66
eISSN - 1944-7450
pISSN - 1944-7442
DOI - 10.1002/ep.11806
Subject(s) - magnesium , leaching (pedology) , cement , fly ash , metallurgy , seawater , corrosion , durability , curing (chemistry) , materials science , environmental science , soil water , composite material , geology , soil science , oceanography
Recent research in cement has investigated the mechanisms of magnesium corrosion; magnesium reacting with calcium silicate hydrate (CSH) and destroying its durability. Relatively high levels of magnesium may be found in certain cements, or it may penetrate cements from seawater or soils. Magnesium, a common industrial waste component, may also contribute to the deterioration of cement‐based stabilization/solidification (S/S). This article reports results showing how various amounts of magnesium may impact lead S/S treatment after short‐ and long‐term curing. In general, lead S/S was more effective for samples with comparable mass amounts of lead and magnesium. For samples with incomparable amounts of lead and magnesium, lead leaching increased with sample curing age. Fly ash additions to cement‐based stabilized/solidified treatment decreased lead leaching in the presence of magnesium. For all project samples, the addition of fly ash increased the number of samples below regulatory limits by a factor of 1.6. © 2013 American Institute of Chemical Engineers Environ Prog, 33: 437–443, 2014