- Title
- Bacterial mineralization of phenanthrene on thermally activated palygorskite: a C-14 radiotracer study
- Creator
- Biswas, Bhabananda; Sarkar, Binoy; Naidu, Ravi
- Relation
- Science of the Total Environment Vol. 579, Issue 1 February 2017, p. 709-717
- Publisher Link
- http://dx.doi.org/10.1016/j.scitotenv.2016.11.037
- Publisher
- Elsevier
- Resource Type
- journal article
- Date
- 2017
- Description
- Clay-bacterial interaction can significantly influence the biodegradation of organic contaminants in the environment. A moderate heat treatment of palygorskite could alter the physicochemical properties of the clay mineral and thus support the growth and function of polycyclic aromatic hydrocarbon (PAH)-degrading bacteria. By using 14C-labelled phenanthrene and a model bacterium Burkholderia sartisoli, we studied the mineralization of phenanthrene on the surface of a moderately heat-treated (up to 400 °C) palygorskite. The heat treatment at 400 °C induced a reduction of binding sites (e.g., by the elimination of organic matter and/or channel shrinkage) in the palygorskite and thus imparted a weaker sequestration of phenanthrene on its surface and within the pores. As a result, a supplement with the thermally modified palygorskite (400 °C) significantly increased (20–30%; p < 0.05) the biomineralization of total phenanthrene in a simulated soil slurry system. These results are highly promising to develop a clay mineral based technology for the bioremediation of PAH contaminants in water and soil environments.
- Subject
- clay-bacterial interaction; polycyclic aromatic hydrocarbon (pah); palygorskite; heat treatment; bioremediation; 14C radiotracer
- Identifier
- http://hdl.handle.net/1959.13/1352482
- Identifier
- uon:30893
- Identifier
- ISSN:0048-9697
- Language
- eng
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