Abstract
The bioremoval potential of Pseudomonas plecoglossicida toward mixed contaminants was explored through the coupled biostimulation and bioaugmentation in soil microcosm. Response surface methodology was employed to optimize nutrients and innoculum size for the cometabolic removal of two representative chloroethylenes, trichloroethylene (TCE) and cis-1,2-dichloroethylene (cis-DCE), mixed with benzene, toluene, ethylbenzene, and xylenes (BTEX). The interactive effects of nutrients [nitrogen (N) and phosphorus (P)] and inoculum size toward the bioremoval of mixture of BTEX (600 mg kg−1), cis-DCE (10 mg kg−1), and TCE (10 mg kg−1) were estimated using principal component analysis and two-dimensional hierarchical cluster analysis. The optimal condition was confirmed with C:N:P ratio of 100:26.7:1.8–4.8 and higher inoculum size (≥25%), where 97.7% of benzene, 98.3% of toluene, 91.2% of ethylbenzene, 45.6% of m,p-xylene, 31.2% of o-xylene, 26.9% of cis-DCE, and 33.5% of TCE were bioremoved.
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Acknowledgements
This work was supported by University of Macau Multi-Year Research Grant (MYRG2017-00181-FST and MYRG2018-00108-FST), National Natural Science Foundation of China (No. 51409106), and Science and Technology Development Fund of Macao (FDCT115/2016/A3 and FDCT044/2017/AFJ).
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This work was supported by University of Macau Multi-Year Research Grant (MYRG2017-00181-FST and MYRG2018-00108-FST), National Natural Science Foundation of China (No. 51409106), and Science and Technology Development Fund of Macao (FDCT115/2016/A3 and FDCT044/2017/AFJ).
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Li, J., Lu, Q., Odey, E.A. et al. Coupling of biostimulation and bioaugmentation for enhanced bioremoval of chloroethylenes and BTEX from clayey soil. Ecotoxicology 30, 1446–1453 (2021). https://doi.org/10.1007/s10646-020-02323-z
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DOI: https://doi.org/10.1007/s10646-020-02323-z