Effect of surface-tailored biocompatible organoclay on the bioavailability and mineralization of polycyclic aromatic hydrocarbons in long-term contaminated soil

Biswas, Bhabananda and Sarkar, Binoy and Faustorilla, Maria Vilma and Naidu, Ravi (2018) Effect of surface-tailored biocompatible organoclay on the bioavailability and mineralization of polycyclic aromatic hydrocarbons in long-term contaminated soil. Environmental Technology and Innovation, 10. pp. 152-161. ISSN 2352-1864

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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 14C-labeled phenanthrene by ca. 1.3-fold relative to the control experiment under a 25-days of incubation.

Item Type:
Journal Article
Journal or Publication Title:
Environmental Technology and Innovation
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/1100/1110
Subjects:
ID Code:
140608
Deposited By:
Deposited On:
27 Jan 2020 16:10
Refereed?:
Yes
Published?:
Published
Last Modified:
16 Sep 2020 06:07