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COMBINING CHEMICAL OXIDATION AND BIOREMEDIATION FOR PETROLEUM POLLUTED SOIL REMEDIATION BY BC-NZVI ACTIVATED PERSULFATE
Zhang, B., Y Guo, J. Huo, H. Xie, C. Xu, and S. Liang.
Chemical Engineering Journal 382: 123055(2020)

Combined remediation by persulfate (PS) with biochar supported nano zero-valent iron (BC-nZVI) was tested to treat total petroleum hydrocarbons in soil in a 60-day lab study. The TPHs degradation underwent chemical degradation (0th-6th day) followed biodegradation (6th-60th day). During the test period, long-chain TPHs constantly degraded and transformed into short-chain molecules in the BC-nZVI/PS groups. Compared with nZVI/PS treatment, BC-nZVI/PS treatment increased soil microbial metabolic activities in the 60 days. Microbial analysis showed that the PS activation groups affected microbial abundance and structure. In BC-nZVI/PS groups, the microbial abundance recovered, and TPHs-degrading bacterium increased over 60 days.



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