- Title
- Burkholderia cepacia immobilized onto rGO as a biomaterial for the removal of naphthalene from wastewater
- Creator
- Zhao, Zhihao; Chen, Wei; Cheng, Ying; Li, Jiabing; Chen, Zuliang
- Relation
- Environmental Research Vol. 235, Issue 15 October 2023, no. 116663
- Publisher Link
- http://dx.doi.org/10.1016/j.envres.2023.116663
- Publisher
- Academic Press
- Resource Type
- journal article
- Date
- 2023
- Description
- As one of the polycyclic aromatic hydrocarbons (PAHs), naphthalene is of serious environmental concern due to its carcinogenicity, persistence and refractory degradation. In this study, a new functional biomaterial based on Burkholderia cepacia (BK) immobilized on reduced graphene oxide (rGO) was prepared, resulting in the removal of 99.0% naphthalene within 48 h. This was better than the 67.3% for free BK and 55.6% for rGO alone. Various characterizations indicated that reduced graphene oxide-Burkholderia cepacia (rGO-BK) was successfully synthesized and secreted non-toxic and degradable surfactants which participated in the degradation of naphthalene. The adsorption kinetics and degradation kinetics conformed best to non-linear pseudo-second-order and pseudo-first-order kinetic models, respectively. Demonstrated in this work is that removing naphthalene by rGO-BK involved both chemically dominated adsorption and biodegradation. As well, GC-MS analysis revealed two things: firstly, that the degraded products of naphthalene were dibutyl phthalate, diethyl phthalate, phthalic acid, and benzoic acid; and secondly, two potentially viable biodegradation pathways of naphthalene by rGO-BK could be proposed. Finally, for practical application experiment, the rGO-BK was exposed to river water samples and generated 99% removal efficiency of naphthalene, so this study offers new insights into biomaterials that can remove naphthalene.
- Subject
- Burkholderia cepacia; immobilization; reduced graphene oxide (rGO); naphthalene; biodegradation; polycyclic aromatic hydrocarbons (PAHs); SDG 6; Sustainable Development Goals
- Identifier
- http://hdl.handle.net/1959.13/1487937
- Identifier
- uon:52286
- Identifier
- ISSN:0013-9351
- Language
- eng
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