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EFFICIENT REMEDIATION OF RIVER SEDIMENTS CONTAMINATED BY POLYCHLORINATED BIPHENYLS AND HEXACHLOROBENZENE BY COUPLING IN SITU PHASE-INVERSION EMULSIFICATION AND BIOLOGICAL REDUCTIVE DECHLORINATION
Chang, S.-C., C.-W. Yeh, S.-K. Lee, T.-W. Chen, and L.-C. Tsai.
International Biodeterioration & Biodegradation 140:133-143(2019)
A field study was conducted to demonstrate effective remediation of Aroclor 1254- and hexachlorobenzene (HCB)-contaminated soils by coupling in situ phase-inversion emulsification and biological reductive dechlorination (ISPIE/BiRD). Results indicated that a single ISPIE operation can remove about 62% and 60% of weathered Aroclor 1254 and HCB, respectively. For weathered HCB and Aroclor 1254, the total removal could reach as high as 98% in 70 days. Metagenomic results showed that heat selection during ISPIE significantly changed the diversity and species evenness of the microbial community and that the Dehalococcoides were not positively correlated with the PCB removals. Instead, heat-tolerant archaea, Methanosaeta, may play much more important roles in the subsequent biological dechlorination.
International Biodeterioration & Biodegradation 140:133-143(2019)
A field study was conducted to demonstrate effective remediation of Aroclor 1254- and hexachlorobenzene (HCB)-contaminated soils by coupling in situ phase-inversion emulsification and biological reductive dechlorination (ISPIE/BiRD). Results indicated that a single ISPIE operation can remove about 62% and 60% of weathered Aroclor 1254 and HCB, respectively. For weathered HCB and Aroclor 1254, the total removal could reach as high as 98% in 70 days. Metagenomic results showed that heat selection during ISPIE significantly changed the diversity and species evenness of the microbial community and that the Dehalococcoides were not positively correlated with the PCB removals. Instead, heat-tolerant archaea, Methanosaeta, may play much more important roles in the subsequent biological dechlorination.
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