Cited by 43Microbial Applications in Construction MaterialsFluoride Effects and RemovalMicrobial Fuel Cells and Bioremediation

The DOI matches its Crossref record; 54 of the 54 references it cites were found in a registry or an index.

Microbial induced calcium precipitation based anaerobic immobilized biofilm reactor for fluoride, calcium, and nitrate removal from groundwater

Abstract

In this study, the anaerobic quartz sand fixed biofilm reactor containing Cupriavidus sp. W12 was established to simultaneously remove calcium (Ca 2+), fluoride (F-) and nitrate (NO 3-N) from groundwater. After 84 days of continuous operation, the optimum operating parameters and defluoridation mechanism were explored, and the microbial community structure under different pH environments were compared and analyzed. Under the optimal operation conditions (HRT of 6 h, initial Ca 2+ concentration of 180 mg L-1, and pH of 7.0), the removal efficiencies of Ca 2+, F-, and NO 3-N were 58.97%, 91.93%, and 100%, respectively. Gas chromatography (GC) results indicate that N 2 is the main gas produced by the bioreactor. Three-dimension excitation emission matrix fluorescence spectroscopy (3D-EEM) showed that extracellular polymers (EPS) are produced during bacterial growth and metabolism. The results of Scanning electron microscopy-energy dispersive spectrometer (SEM-EDS), X-ray diffraction (XRD), and Fourier transform infrared spectrometer (FTIR) demonstrated that the defluoridation mechanism is attributed to the synergetic effects of ion exchange, co-precipitation, and chemisorption. The comparative analysis of the microbial community structure under different pH conditions show that Cupriavidus is the dominant bacteria in the bioreactor throughout the experiment, and it shows a prominent advantage at pH of 7.0. This research provides an application foundation for anaerobic microbial induced calcium precipitation (MICP) bioremediation of Ca 2+, F-, and NO 3-N from groundwater.

Overview

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Crossref · 10.1016/j.chemosphere.2022.133955

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54 of 54 references verified0 citation errors · 0 not checkable

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Metadata

Authors
Yang, W., Ali, A., Su, J., Liu, J., Wang, Z., & Zhang, L.
Affiliations
Xi'an University of Architecture and Technology (CN)
Corresponding author
Su, Junfeng
Venue
Chemosphere
Publisher
Elsevier BV
Published
2022-05
Volume
295
Pages
133955
ISSN
0045-6535 (ISSN-L)
OpenAlex
W4211110341
Cited by
43
References
54
Citations by year
2026: 6 · 2025: 10 · 2024: 12 · 2023: 9 · 2022: 6
FWCI
2.69
Type
journal article
Language
en
Open access
closed
Locations
  • Chemosphere (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Physical Sciences › Environmental Science › Environmental Engineering › Microbial Applications in Construction Materials
  • Physical Sciences › Environmental Science › Water Science and Technology › Fluoride Effects and Removal
  • Physical Sciences › Environmental Science › Environmental Engineering › Microbial Fuel Cells and Bioremediation
Keywords
groundwater treatment, fluoride removal, calcium removal, nitrate removal, Cupriavidus, ion exchange, co-precipitation, chemisorption, extracellular polymeric substances, microbial community structure, pH effect, bioremediation
MeSH terms
Anaerobiosis, Calcium, Calcium Fluoride, Fluorides, Nitrates, Biofilms, Bioreactors, Cupriavidus, Denitrification, Groundwater

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