PMID- 34271357
OWN - NLM
STAT- MEDLINE
DCOM- 20210817
LR  - 20210817
IS  - 1095-8630 (Electronic)
IS  - 0301-4797 (Linking)
VI  - 296
DP  - 2021 Oct 15
TI  - Microbiologically induced calcite precipitation technology for mineralizing lead 
      and cadmium in landfill leachate.
PG  - 113199
LID - S0301-4797(21)01261-5 [pii]
LID - 10.1016/j.jenvman.2021.113199 [doi]
AB  - As a new bioremediation technology for toxic metals, microbiologically induced 
      calcite precipitation (MICP) is gradually becoming a research focus. This study 
      investigated the application of MICP to mineralize toxic metals (lead and 
      cadmium) in landfill leachate for the first time. In the experiment of 
      remediating synthetic landfill leachate (SLL) contaminated by Pb(2+), 100% of the 
      20 mg/L Pb(2+) was removed when the maximum urease activity was only 20.96 U/ml. 
      Scanning electron microscopy and energy dispersive spectroscopy (SEM-EDS) and 
      laser particle size characterizations of the precipitates indicate the formation 
      of agglomerated square particles, 76.9% of which had sizes that ranged from 33.93 
      to 57.06 mum. Fourier transform infrared spectroscopic and X-ray diffraction 
      analyses confirmed that the precipitates consisted predominantly of calcite 
      crystals, and the unit cell lattice constants of the precipitates 
      (a = b = 4.984 A, c = 17.171 A) matched those of calcite, while lead was fixed as 
      hydrocerussite. In addition, the Pb-MICP precipitates were stable under 
      continuous acid degradation (pH = 5.5), and only 1.76% of the lead was released 
      after 15 days. In the verification test of toxic metals remediation in a real 
      landfill leachate (RLL), all of the Pb(2+) and Cd(2+) (initial concentrations: 
      Pb(2+) = 25 mg/L; Cd(2+) = 5.6205 mg/L) was mineralized simultaneously, which 
      further confirmed the feasibility of MICP for toxic metal remediation in landfill 
      leachate. However, optimizing the urea dosage and combining the ammonium recovery 
      are necessary strategies required for improving the economic and environmental 
      benefits of the MICP process.
CI  - Copyright (c) 2021 Elsevier Ltd. All rights reserved.
FAU - Zeng, Yong
AU  - Zeng Y
AD  - State Key Laboratory of Pollution Control and Resource Reuse, School of 
      Environment, Nanjing University, Nanjing, 210023, PR China. Electronic address: 
      zy_duty@163.com.
FAU - Chen, Zezhi
AU  - Chen Z
AD  - State Key Laboratory of Pollution Control and Resource Reuse, School of 
      Environment, Nanjing University, Nanjing, 210023, PR China. Electronic address: 
      chenzzg@nju.edu.cn.
FAU - Du, Yaling
AU  - Du Y
AD  - CAS Key Laboratory of Environmental and Applied Microbiology, Environmental 
      Microbiology Key Laboratory of Sichuan Province, Chengdu Institute of Biology, 
      Chinese Academy of Sciences, Chengdu, 610041, PR China.
FAU - Lyu, Qingyang
AU  - Lyu Q
AD  - CAS Key Laboratory of Environmental and Applied Microbiology, Environmental 
      Microbiology Key Laboratory of Sichuan Province, Chengdu Institute of Biology, 
      Chinese Academy of Sciences, Chengdu, 610041, PR China.
FAU - Yang, Ziyi
AU  - Yang Z
AD  - State Key Laboratory of Pollution Control and Resource Reuse, School of 
      Environment, Nanjing University, Nanjing, 210023, PR China.
FAU - Liu, Yang
AU  - Liu Y
AD  - CAS Key Laboratory of Environmental and Applied Microbiology, Environmental 
      Microbiology Key Laboratory of Sichuan Province, Chengdu Institute of Biology, 
      Chinese Academy of Sciences, Chengdu, 610041, PR China.
FAU - Yan, Zhiying
AU  - Yan Z
AD  - CAS Key Laboratory of Environmental and Applied Microbiology, Environmental 
      Microbiology Key Laboratory of Sichuan Province, Chengdu Institute of Biology, 
      Chinese Academy of Sciences, Chengdu, 610041, PR China. Electronic address: 
      yanzy@cib.ac.cn.
LA  - eng
PT  - Journal Article
DEP - 20210713
PL  - England
TA  - J Environ Manage
JT  - Journal of environmental management
JID - 0401664
RN  - 0 (Water Pollutants, Chemical)
RN  - 00BH33GNGH (Cadmium)
RN  - 2P299V784P (Lead)
RN  - H0G9379FGK (Calcium Carbonate)
SB  - IM
MH  - Cadmium
MH  - *Calcium Carbonate
MH  - Lead
MH  - Technology
MH  - *Water Pollutants, Chemical
OTO - NOTNLM
OT  - Heavy metal
OT  - Landfill leachate
OT  - Lattice constants
OT  - MICP
OT  - Precipitation stability
OT  - Sporosarcina pasteurii
EDAT- 2021/07/17 06:00
MHDA- 2021/08/18 06:00
CRDT- 2021/07/16 20:27
PHST- 2021/03/29 00:00 [received]
PHST- 2021/06/22 00:00 [revised]
PHST- 2021/06/29 00:00 [accepted]
PHST- 2021/07/17 06:00 [pubmed]
PHST- 2021/08/18 06:00 [medline]
PHST- 2021/07/16 20:27 [entrez]
AID - S0301-4797(21)01261-5 [pii]
AID - 10.1016/j.jenvman.2021.113199 [doi]
PST - ppublish
SO  - J Environ Manage. 2021 Oct 15;296:113199. doi: 10.1016/j.jenvman.2021.113199. 
      Epub 2021 Jul 13.