PMID- 37051271
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20230415
IS  - 2296-4185 (Print)
IS  - 2296-4185 (Electronic)
IS  - 2296-4185 (Linking)
VI  - 11
DP  - 2023
TI  - Immobilizing lead and copper in aqueous solution using microbial- and 
      enzyme-induced carbonate precipitation.
PG  - 1146858
LID - 10.3389/fbioe.2023.1146858 [doi]
LID - 1146858
AB  - Inappropriate irrigation could trigger migration of heavy metals into surrounding 
      environments, causing their accumulation and a serious threat to human central 
      nervous system. Traditional site remediation technologies are criticized because 
      they are time-consuming and featured with high risk of secondary pollution. In 
      the past few years, the microbial-induced carbonate precipitation (MICP) is 
      considered as an alternative to traditional technologies due to its easy 
      maneuverability. The enzyme-induced carbonate precipitate (EICP) has attracted 
      attention because bacterial cultivation is not required prior to catalyzing urea 
      hydrolysis. This study compared the performance of lead (Pb) and copper (Cu) 
      remediation using MICP and EICP respectively. The effect of the degree of urea 
      hydrolysis, mass and species of carbonate precipitation, and chemical and 
      thermodynamic properties of carbonates on the remediation efficiency was 
      investigated. Results indicated that ammonium ion (NH(4) (+)) concentration 
      reduced with the increase in lead ion (Pb(2+)) or copper ion (Cu(2+)) 
      concentration, and for a given Pb(2+) or Cu(2+) concentration, it was much higher 
      under MICP than EICP. Further, the remediation efficiency against Cu(2+) is 
      approximately zero, which is way below that against Pb(2+) (approximately 100%). 
      The Cu(2+) toxicity denatured and even inactivated the urease, reducing the 
      degree of urea hydrolysis and the remediation efficiency. Moreover, the reduction 
      in the remediation efficiency against Pb(2+) and Cu(2+) appeared to be due to the 
      precipitations of cotunnite and atacamite respectively. Their chemical and 
      thermodynamic properties were not as good as calcite, cerussite, phosgenite, and 
      malachite. The findings shed light on the underlying mechanism affecting the 
      remediation efficiency against Pb(2+) and Cu(2+).
CI  - Copyright (c) 2023 Wang, Cheng, Xue, Rahman, Xie and Hu.
FAU - Wang, Lin
AU  - Wang L
AD  - School of Civil Engineering, Xi'an University of Architecture and Technology, 
      Xi'an, China.
AD  - Shaanxi Key Laboratory of Geotechnical and Underground Space Engineering (XAUAT), 
      Xi'an, China.
FAU - Cheng, Wen-Chieh
AU  - Cheng WC
AD  - School of Civil Engineering, Xi'an University of Architecture and Technology, 
      Xi'an, China.
AD  - Shaanxi Key Laboratory of Geotechnical and Underground Space Engineering (XAUAT), 
      Xi'an, China.
FAU - Xue, Zhong-Fei
AU  - Xue ZF
AD  - School of Civil Engineering, Xi'an University of Architecture and Technology, 
      Xi'an, China.
AD  - Shaanxi Key Laboratory of Geotechnical and Underground Space Engineering (XAUAT), 
      Xi'an, China.
FAU - Rahman, Md Mizanur
AU  - Rahman MM
AD  - UniSA STEM, SIRM, University of south Australia, Adelaide, SA, Australia.
FAU - Xie, Yi-Xin
AU  - Xie YX
AD  - School of Civil Engineering, Xi'an University of Architecture and Technology, 
      Xi'an, China.
AD  - Shaanxi Key Laboratory of Geotechnical and Underground Space Engineering (XAUAT), 
      Xi'an, China.
FAU - Hu, Wenle
AU  - Hu W
AD  - School of Civil Engineering, Xi'an University of Architecture and Technology, 
      Xi'an, China.
AD  - Shaanxi Key Laboratory of Geotechnical and Underground Space Engineering (XAUAT), 
      Xi'an, China.
LA  - eng
PT  - Journal Article
DEP - 20230327
PL  - Switzerland
TA  - Front Bioeng Biotechnol
JT  - Frontiers in bioengineering and biotechnology
JID - 101632513
PMC - PMC10083330
OTO - NOTNLM
OT  - EICP
OT  - MICP
OT  - heavy metal
OT  - remediation efficiency
OT  - thermodynamic properties
COIS- The authors declare that the research was conducted in the absence of any 
      commercial or financial relationships that could be construed as a potential 
      conflict of interest.
EDAT- 2023/04/14 06:00
MHDA- 2023/04/14 06:01
PMCR- 2023/01/01
CRDT- 2023/04/13 01:59
PHST- 2023/01/18 00:00 [received]
PHST- 2023/03/16 00:00 [accepted]
PHST- 2023/04/14 06:01 [medline]
PHST- 2023/04/13 01:59 [entrez]
PHST- 2023/04/14 06:00 [pubmed]
PHST- 2023/01/01 00:00 [pmc-release]
AID - 1146858 [pii]
AID - 10.3389/fbioe.2023.1146858 [doi]
PST - epublish
SO  - Front Bioeng Biotechnol. 2023 Mar 27;11:1146858. doi: 10.3389/fbioe.2023.1146858. 
      eCollection 2023.