AUTHOR=Hao Liting , Wang Xinli , Shi Jinkai , Li Lin , Hao Xiaodi 

TITLE=Vanadium (V) bio-detoxification based on washing water of rice as microbial and carbon sources

JOURNAL=Frontiers in Environmental Science

VOLUME=Volume 11 - 2023

YEAR=2023

URL=https://www.frontiersin.org/journals/environmental-science/articles/10.3389/fenvs.2023.1096845

DOI=10.3389/fenvs.2023.1096845

ISSN=2296-665X

ABSTRACT=Mining and smelting result in vanadium (V) released into the environment. Biologically removing V(V) with washing water of rice (WWR) was investigated with this study. Over a 7-d trial, the V(V) removal efficiency increased with dosing WWR dosage, up to 56.6%. The results demonstrated that WWR could be used as carbon and microbial sources for biologically reducing V(V). Using domesticated sludge as inocula could enhance V(V) detoxification performance, and 95.5% of V(V) was removed in the inoculated system for 5 d. Soluble V(V) was transformed into insoluble V(IV) (VO2), which could be further removed with precipitation. Besides ABC transporters, two-component system was also involved in V(V) reduction. The study confirmed that WWR could be utilized for V(V) bio-detoxification.