Journal
BIORESOURCE TECHNOLOGY
Volume 260, Issue -, Pages 38-43Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2018.03.084
Keywords
Nitrobenzene pollution; In situ remediation; Aquifer medium; Iron speciation distribution
Funding
- National Natural Science Foundation of China, China [41772244, 41702269, 41572214, 41530636]
- Key Laboratory of Groundwater Resources and Environment, Ministry of Education
Ask authors/readers for more resources
Microbial dissimilatory iron reduction could remediate reducible pollutants in groundwater, such as nitrobenzene (NB). But the natural attenuation rate in aquifer is limited. To stimulate this process, emulsified vegetable oil (EVO) was injected as a remediation agent. The mechanism of this process was studied. Results showed that the addition of EVO made iron easier used by microorganisms and thus promoted dissimilatory iron reduction. The readily used Fe(III) served as electron acceptor and was reduced to Fe(II). Fe(II) supplied electrons to NB, with NB reduced to aniline. Sulphide in the aquifer media also donated electrons and oxidized to polysulfide, then forming precipitates with Fe(II) to the surface of aquifer media, and thus slowing down the electron supplying of EVO and forming permanent efficiency for NB remediation. The work helps to complete a systematic understanding of NB remediation process under stimulation of EVO.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available