Effect of surface-tailored biocompatible organoclay on the bioavailability and mineralization of polycyclic aromatic hydrocarbons in long-term contaminated soil
Date
2018
Authors
Biswas, B.
Sarkar, B.
Faustorilla, M.V.
Naidu, R.
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Journal article
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Environmental Technology & Innovation, 2018; 10:152-161
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Abstract
A surface-tailored organoclay (palmitic acid-tailored Arquad ® -modified bentonite, ABP) was prepared for the selective adsorption of cadmium in the presence of polycyclic aromatic hydrocarbon (PAH) contaminants in a long-term contaminated soil. The efficiency of the organoclay (ABP) and the effect of its parent clays were assessed concerning the microbial viability, metal immobilization and PAHs bioavailability and biodegradation in a long-term (70 days) soil incubation study. The surface-tailored organoclay (ABP) increased the bacterial growth by 5-7 fold than the control and parent clay-amended soil. With an increased effect of aging, the ABP immobilized more Cd from the soil solution (2-folds higher than the control soil), and simultaneously increased the bioavailability (1.6-1.8 fold) of low molecular weight PAHs related to the control soil and the parent clay-amended soils. The surface-tailored organoclay (ABP) could also increase the mineralization of 14 C-labeled phenanthrene by ca. 1.3-fold relative to the control experiment under a 25-days of incubation.
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Data source: Supplementary information, https://doi.org/10.1016/j.eti.2018.01.013.
Link to a related website: http://eprints.whiterose.ac.uk/131065/1/1-s2.0-S2352186417303292-main.pdf, Open Access via Unpaywall
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Copyright 2018 Elsevier