Abstract
AbstractA limited concentration of dissolved oxygen commonly reduces the effectiveness of groundwater bioremediation. A novel bamboo biochar oxygen‐releasing bead (ORB) was prepared and its application in groundwater bioremediation was evaluated. The results reveal that bamboo biochar effectively adsorbed benzene, toluene, ethylene, and xylene. The Freundlich model described the adsorption behavior (R2 = 0.990) well. The response surface method was used to prepare biochar‐ORBs. Results indicate that the proportions of calcium peroxide, citrate, polyvinyl alcohol, and bamboo biochar for the optimal oxygen‐releasing capacity of biochar‐ORBs were 20:2.22:9.23:31.5 (w/w/w/w). A multiple linear regression equation effectively predicted oxygen releasing capacity (R2 = 0.991). A column experiment indicated that the period of oxygen release from biochar‐ORBs (104 days) was much longer than that from ORBs (51 days). The mechanical strength of biochar‐ORBs (disintegration ratio: 3.4%) exceeded that of ORBs (disintegration ratio: 6.9%). Degraders that contained biochar‐ORBs rapidly removed 99% toluene at a concentration of 45.6 mg L−1. Scanning electron microscopy showed that degraders attached to and grew on biochar‐ORBs following bioremediation. Taken together, the results reveal that biochar‐ORB is a potential oxygen‐releasing material for use in groundwater bioremediation.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
