PMID- 35157876
OWN - NLM
STAT- MEDLINE
DCOM- 20220315
LR  - 20220315
IS  - 1879-1298 (Electronic)
IS  - 0045-6535 (Linking)
VI  - 295
DP  - 2022 May
TI  - Microbial induced calcium precipitation based anaerobic immobilized biofilm 
      reactor for fluoride, calcium, and nitrate removal from groundwater.
PG  - 133955
LID - S0045-6535(22)00448-9 [pii]
LID - 10.1016/j.chemosphere.2022.133955 [doi]
AB  - 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.
CI  - Copyright (c) 2022 Elsevier Ltd. All rights reserved.
FAU - Yang, Wenshuo
AU  - Yang W
AD  - School of Environmental and Municipal Engineering, Xi'an University of 
      Architecture and Technology, Xi'an, 710055, China; Shaanxi Key Laboratory of 
      Environmental Engineering, Xi'an University of Architecture and Technology, 
      Xi'an, 710055, China.
FAU - Ali, Amjad
AU  - Ali A
AD  - School of Environmental and Municipal Engineering, Xi'an University of 
      Architecture and Technology, Xi'an, 710055, China; Shaanxi Key Laboratory of 
      Environmental Engineering, Xi'an University of Architecture and Technology, 
      Xi'an, 710055, China.
FAU - Su, Junfeng
AU  - Su J
AD  - School of Environmental and Municipal Engineering, Xi'an University of 
      Architecture and Technology, Xi'an, 710055, China; Shaanxi Key Laboratory of 
      Environmental Engineering, Xi'an University of Architecture and Technology, 
      Xi'an, 710055, China. Electronic address: sjf1977518@sina.com.
FAU - Liu, Jiaran
AU  - Liu J
AD  - School of Environmental and Municipal Engineering, Xi'an University of 
      Architecture and Technology, Xi'an, 710055, China; Shaanxi Key Laboratory of 
      Environmental Engineering, Xi'an University of Architecture and Technology, 
      Xi'an, 710055, China.
FAU - Wang, Zhao
AU  - Wang Z
AD  - School of Environmental and Municipal Engineering, Xi'an University of 
      Architecture and Technology, Xi'an, 710055, China; Shaanxi Key Laboratory of 
      Environmental Engineering, Xi'an University of Architecture and Technology, 
      Xi'an, 710055, China.
FAU - Zhang, Lingfei
AU  - Zhang L
AD  - School of Environmental and Municipal Engineering, Xi'an University of 
      Architecture and Technology, Xi'an, 710055, China; Shaanxi Key Laboratory of 
      Environmental Engineering, Xi'an University of Architecture and Technology, 
      Xi'an, 710055, China.
LA  - eng
PT  - Journal Article
DEP - 20220211
PL  - England
TA  - Chemosphere
JT  - Chemosphere
JID - 0320657
RN  - 0 (Nitrates)
RN  - O3B55K4YKI (Calcium Fluoride)
RN  - Q80VPU408O (Fluorides)
RN  - SY7Q814VUP (Calcium)
SB  - IM
MH  - Anaerobiosis
MH  - Biofilms
MH  - Bioreactors
MH  - Calcium
MH  - Calcium Fluoride
MH  - *Cupriavidus
MH  - Denitrification
MH  - Fluorides
MH  - *Groundwater
MH  - Nitrates
OTO - NOTNLM
OT  - Anaerobic biofilm reactor
OT  - Cupriavidus sp. W12
OT  - Defluoridation
OT  - Denitrification
OT  - Microbial community structure
EDAT- 2022/02/15 06:00
MHDA- 2022/03/16 06:00
CRDT- 2022/02/14 20:10
PHST- 2021/12/02 00:00 [received]
PHST- 2022/01/21 00:00 [revised]
PHST- 2022/02/09 00:00 [accepted]
PHST- 2022/02/15 06:00 [pubmed]
PHST- 2022/03/16 06:00 [medline]
PHST- 2022/02/14 20:10 [entrez]
AID - S0045-6535(22)00448-9 [pii]
AID - 10.1016/j.chemosphere.2022.133955 [doi]
PST - ppublish
SO  - Chemosphere. 2022 May;295:133955. doi: 10.1016/j.chemosphere.2022.133955. Epub 
      2022 Feb 11.