Journal
SCIENCE OF THE TOTAL ENVIRONMENT
Volume 742, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.scitotenv.2020.140685
Keywords
Chromium; Microbial immobilization; Phosphorus minerals; Continuous flow reaction; Bioremediation enhancement
Categories
Funding
- Major Science and Technology Program for Water Pollution Control and Treatment [2017ZX07202002]
- National Natural Science Foundation of China (NSFC) [21876159]
- Fundamental Research Funds for the Central Universities [2652018181, 2652019283]
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Due to the widespread use of chromium (Cr) across various industrial processes, the process of in-situ remedialion of Cr-contaminated groundwater has received extensive attention. Previous studies of solid-phase phosphorus sources and microbial immobilization co-strengthening materials have demonstrated that their performance in continuous flow reactions is of great significance towards practical application of these technologies. It was suggested that Microbial-Phosphorus minerals-Alginate (MPA) immobilized particles showed superior performance (high Cr removal efficiency, low phosphorus surplus, and high environmental resistance) in comparisons of non-immobilization systems and different immobilization methods under continuous flow conditions. Microbial community analysis revealed significant differences between different systems as well as between variations in environmental factors, providing further support for the above conclusions. Synthetic wastewater (synthesized by actual groundwater) was also introduced to further verify the practical application potential of MPA immobilized particles. The results of this study provide a new insight and relevant bench scale data to support the enhancement of in-situ Cr(VI) bioremediation. (C) 2020 Elsevier B.V. All rights reserved.
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