Abstract：
:Contamination episodes in soils require interventions to attenuate their impact. These actions are often based on the addition of materials to increase contaminant retention in the soil and to dilute the contaminant concentration. Here, non-hazardous wastes (such as sugar foam, fly ash and a material produced by the zeolitization of fly ash) and silicates (including bentonites) were tested and fully characterized in the laboratory to select suitable materials for remediating metal-contaminated soils. Data from X-ray fluorescence (XRF), N(2) adsorption/desorption isotherms, X-ray diffraction (XRD) and scanning electron microscopy/energy-dispersive X-ray spectroscopy (SEM-EDX) analyses revealed the chemical composition, specific surface area and the phases appearing in the materials. A pH titration test allowed the calculation of their acid neutralization capacity (ANC). The metal sorption and desorption capacities of the waste materials and silicates were also estimated. Sugar foam, fly ash and the zeolitic material were the best candidate materials. Sugar foam was selected because of its high ANC (17000 meq kg(-1)), and the others were selected because of their larger distribution coefficients and lower sorption reversibilities than those predicted in the contaminated soils.
journal_name
Chemospherejournal_title
Chemosphereauthors
González-Núñez R,Alba MD,Orta MM,Vidal M,Rigol Adoi
10.1016/j.chemosphere.2011.09.042subject
Has Abstractpub_date
2011-11-01 00:00:00pages
1511-7issue
9eissn
0045-6535issn
1879-1298pii
S0045-6535(11)01086-1journal_volume
85pub_type
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