PMID- 36174467
OWN - NLM
STAT- MEDLINE
DCOM- 20221109
LR  - 20221109
IS  - 1095-8630 (Electronic)
IS  - 0301-4797 (Linking)
VI  - 324
DP  - 2022 Dec 15
TI  - Synergistic removal of phosphorus and fluorine impurities in phosphogypsum by 
      enzyme-induced modified microbially induced carbonate precipitation method.
PG  - 116300
LID - S0301-4797(22)01873-4 [pii]
LID - 10.1016/j.jenvman.2022.116300 [doi]
AB  - Microbially induced carbonate precipitation (MICP) technology is difficult to be 
      used for phosphogypsum (PG) treatment because the pH of PG is too low to be 
      suitable for the growth of some bacteria. When acidophilus bacteria are used to 
      treat PG, their low mineralization rate leads to low removal of the impurities. 
      Based on the above problems, this study reports a new method that uses enzyme 
      induced carbonate precipitation (EICP) modified acidophilus bacteria solution to 
      remove phosphorus (P) and fluorine (F) in PG. Five kinds of mixtures of MICP and 
      EICP (ME) were used to leach the PG column, and its mechanism was discussed. The 
      results show that when the ratio of MICP to EICP is 2:1, the removal ratio of P 
      and F is the highest, which reaches 72.87-74.92%. Compared with the single 
      traditional bacillus solution or single acidophilic bacteria solution, the 
      impurity removal ratio of the ME21 (MICP:EICP=2:1) mixture is increased by about 
      13%. The good acid resistance of the urease enzyme and acidophilic bacteria 
      improves their growth and activity, thus increasing the biomineralization rate by 
      about 22%. Additionally, the ME treatment is 30% cheaper than the traditional 
      binder treatment. Therefore, this new treatment is a low-cost and environmentally 
      friendly method.
CI  - Copyright (c) 2022 Elsevier Ltd. All rights reserved.
FAU - Xiang, Junchen
AU  - Xiang J
AD  - School of Resource and Civil Engineering, Northeastern University, Shenyang, 
      110819, China; Science and Technology Innovation Center of Smart Water and 
      Resource Environment, Northeastern University, Shenyang, 110819, China.
FAU - Qiu, Jingping
AU  - Qiu J
AD  - School of Resource and Civil Engineering, Northeastern University, Shenyang, 
      110819, China; Science and Technology Innovation Center of Smart Water and 
      Resource Environment, Northeastern University, Shenyang, 110819, China. 
      Electronic address: qiujingping@mail.neu.edu.cn.
FAU - Song, Yuying
AU  - Song Y
AD  - School of Civil Engineering, Guangdong Baiyun University, Guangzhou, 510450, 
      China.
FAU - Miao, Yingyan
AU  - Miao Y
AD  - School of Civil Architecture and Environment, Hubei University of Technology, 
      Wuhan, 430068, China.
FAU - Gu, Xiaowei
AU  - Gu X
AD  - School of Resource and Civil Engineering, Northeastern University, Shenyang, 
      110819, China; Science and Technology Innovation Center of Smart Water and 
      Resource Environment, Northeastern University, Shenyang, 110819, China.
LA  - eng
PT  - Journal Article
DEP - 20220926
PL  - England
TA  - J Environ Manage
JT  - Journal of environmental management
JID - 0401664
RN  - 13397-24-5 (phosphogypsum)
RN  - 284SYP0193 (Fluorine)
RN  - H0G9379FGK (Calcium Carbonate)
RN  - 27YLU75U4W (Phosphorus)
RN  - 0 (Carbonates)
RN  - Q80VPU408O (Fluorides)
SB  - IM
MH  - *Fluorine
MH  - *Calcium Carbonate
MH  - Phosphorus
MH  - Carbonates
MH  - Bacteria
MH  - Fluorides
MH  - Chemical Precipitation
OTO - NOTNLM
OT  - Biomineralization
OT  - Enzyme induced carbonate precipitation
OT  - Leaching test
OT  - Microbially induced carbonate precipitation
OT  - Phosphogypsum
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- 2022/09/30 06:00
MHDA- 2022/11/10 06:00
CRDT- 2022/09/29 18:32
PHST- 2022/08/01 00:00 [received]
PHST- 2022/08/30 00:00 [revised]
PHST- 2022/09/14 00:00 [accepted]
PHST- 2022/09/30 06:00 [pubmed]
PHST- 2022/11/10 06:00 [medline]
PHST- 2022/09/29 18:32 [entrez]
AID - S0301-4797(22)01873-4 [pii]
AID - 10.1016/j.jenvman.2022.116300 [doi]
PST - ppublish
SO  - J Environ Manage. 2022 Dec 15;324:116300. doi: 10.1016/j.jenvman.2022.116300. 
      Epub 2022 Sep 26.