PMID- 34563912
OWN - NLM
STAT- MEDLINE
DCOM- 20211130
LR  - 20211130
IS  - 1879-1026 (Electronic)
IS  - 0048-9697 (Linking)
VI  - 806
IP  - Pt 1
DP  - 2022 Feb 1
TI  - Synergistic removal of fluoride from groundwater by seed crystals and bacteria 
      based on microbially induced calcium precipitation.
PG  - 150341
LID - S0048-9697(21)05418-8 [pii]
LID - 10.1016/j.scitotenv.2021.150341 [doi]
AB  - A new hypothesis that seed crystals (SC) and bacteria based on microbially 
      induced calcium precipitation (MICP) synergistically remove fluoride (F(-)) from 
      groundwater was proposed, with a focus on evaluating the defluoridation potential 
      of this method and revealing its F(-) removal mechanism. The crucial conditions 
      were optimized to reduce preparation and operation costs. SC furnished more 
      available binding sites due to the existence of bacteria, and the reuse 
      experiments showed that the defluoridation efficiency of SC still remained a high 
      level after 14 cycles (70.10%), with a residual F(-) concentration of 
      0.96 mg L(-1). The SEM-EDS, FTIR and XRD analyses indicated the predominant F(-) 
      removal mechanism of SC could be ascribed to the chemisorption, ion exchange, and 
      co-precipitation. Moreover, ion exchange and co-precipitation (PO(4)(3-) 
      involvement) were validated more contributive than chemisorption (CaCO(3) and 
      CaSO(4) involvement). As a feasible, reusable, and eco-friendly technique, SC 
      suggests promising applications in the treatment of fluoride-contaminated 
      groundwater.
CI  - Copyright (c) 2021 Elsevier B.V. All rights reserved.
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 - 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 - 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 - Zhang, Ruijie
AU  - Zhang R
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 - 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 - Xu, Liang
AU  - Xu 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.
FAU - Shi, Jun
AU  - Shi 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 - Gao, Zhihong
AU  - Gao 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.
LA  - eng
PT  - Journal Article
DEP - 20210915
PL  - Netherlands
TA  - Sci Total Environ
JT  - The Science of the total environment
JID - 0330500
RN  - Q80VPU408O (Fluorides)
RN  - SY7Q814VUP (Calcium)
SB  - IM
MH  - Bacteria
MH  - Calcium
MH  - *Fluorides
MH  - *Groundwater
OTO - NOTNLM
OT  - Defluoridation
OT  - Groundwater
OT  - Mechanisms
OT  - Pseudomonas WZ39
OT  - Seed crystals
COIS- Declaration of competing interest The authors declare that they have no known 
      competing financial interests or personal relationships that could have appeared 
      to influence the work reported in this paper.
EDAT- 2021/09/27 06:00
MHDA- 2021/12/01 06:00
CRDT- 2021/09/26 20:52
PHST- 2021/09/02 00:00 [received]
PHST- 2021/09/08 00:00 [revised]
PHST- 2021/09/10 00:00 [accepted]
PHST- 2021/09/27 06:00 [pubmed]
PHST- 2021/12/01 06:00 [medline]
PHST- 2021/09/26 20:52 [entrez]
AID - S0048-9697(21)05418-8 [pii]
AID - 10.1016/j.scitotenv.2021.150341 [doi]
PST - ppublish
SO  - Sci Total Environ. 2022 Feb 1;806(Pt 1):150341. doi: 
      10.1016/j.scitotenv.2021.150341. Epub 2021 Sep 15.