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EVALUATING A NOVEL PERMEABLE REACTIVE BIO-BARRIER TO REMEDIATE PAH-CONTAMINATED GROUNDWATER
Liu, C., X. Chen, E. E. Mack, S. Wang, W. Du, Y. Yin, S.A. Banwart, and H. Guo.
Journal of Hazardous Materials 368:444-451(2019)
Two permeable reactive barrier (PRB) columns that relied on microbes' self-domestication mechanisms were designed and used to remediate simulated PAH-impacted groundwater. The carbon source for A was based on wheat straw, and B was based on coconut shell biochar. Results showed that both A and B removed almost 100% of phenanthrene. More carbon was released from A (80-500 mg/L) than from B (72-195 mg/L), and slightly more oxygen was released from B (7.31-10.31 mg/L) than A (7.15-9.64 mg/L). The release of organic carbon from material B was more stable. The bacterial communities of both columns comprised members of the Mycobacterium, Pseudomonas, and Sphingomonas genera that are known to degrade phenanthrene, and Pseudomonas and Sphingomonas were seven times more abundant in column B than in column A. Results indicated that material B is more promising for treating PAH-contaminated groundwater.
Journal of Hazardous Materials 368:444-451(2019)
Two permeable reactive barrier (PRB) columns that relied on microbes' self-domestication mechanisms were designed and used to remediate simulated PAH-impacted groundwater. The carbon source for A was based on wheat straw, and B was based on coconut shell biochar. Results showed that both A and B removed almost 100% of phenanthrene. More carbon was released from A (80-500 mg/L) than from B (72-195 mg/L), and slightly more oxygen was released from B (7.31-10.31 mg/L) than A (7.15-9.64 mg/L). The release of organic carbon from material B was more stable. The bacterial communities of both columns comprised members of the Mycobacterium, Pseudomonas, and Sphingomonas genera that are known to degrade phenanthrene, and Pseudomonas and Sphingomonas were seven times more abundant in column B than in column A. Results indicated that material B is more promising for treating PAH-contaminated groundwater.
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