PMID- 36283435
OWN - NLM
STAT- MEDLINE
DCOM- 20221123
LR  - 20221123
IS  - 1879-1298 (Electronic)
IS  - 0045-6535 (Linking)
VI  - 311
IP  - Pt 1
DP  - 2023 Jan
TI  - Synergistic mechanism and application of microbially induced carbonate 
      precipitation (MICP) and inorganic additives for passivation of heavy metals in 
      copper-nickel tailings.
PG  - 136981
LID - S0045-6535(22)03474-9 [pii]
LID - 10.1016/j.chemosphere.2022.136981 [doi]
AB  - Tailings are one of the largest quantities of hazardous waste in the world, and 
      their treatment is difficult and expensive. In this work, a new, low-cost 
      technique coupling microbially induced carbonate precipitation (MICP) and 
      inorganic additives was proposed, optimized, and applied. The results showed that 
      CaO was the best additive among the six tested, with an optimum dosage of 5%. A 
      90-day experiment indicated that the MICP-CaO coupled technique was highly 
      effective for all the concerned heavy metals (Cu, Ni, Pb, and Cr) in the Cu-Ni 
      tailings. During the stabilization period (20-90 days), the passivation rates 
      were stable at 78.8 +/- 2.9% (Cu), 78.1 +/- 1.0% (Ni), 89.2 +/- 1.0% (Pb), and 
      97.8 +/- 0.5% (Cr), 2%-866% higher than the single technique of either MICP or CaO. 
      Multiple analyses demonstrated that the synergistic effect of MICP and CaO 
      produced a large amount of calcite (1.5% of the tailings). This calcite cemented 
      the tailings particles, sequestrated heavy metal ions into the lattices, and 
      played a key role in heavy metal passivation. Moreover, CaO and MICP improved the 
      strength and compactness of solidified body, respectively. This work demonstrates 
      the feasibility of the MICP-CaO coupled technique in tailings solidification, 
      which can be applied in practical projects.
CI  - Copyright (c) 2022 Elsevier Ltd. All rights reserved.
FAU - He, Zhanfei
AU  - He Z
AD  - Key Laboratory of Microbial Technology for Industrial Pollution Control of 
      Zhejiang Province, College of Environment, Zhejiang University of Technology, 
      Hangzhou, China.
FAU - Xu, Yiting
AU  - Xu Y
AD  - Key Laboratory of Microbial Technology for Industrial Pollution Control of 
      Zhejiang Province, College of Environment, Zhejiang University of Technology, 
      Hangzhou, China.
FAU - Wang, Wenyi
AU  - Wang W
AD  - Key Laboratory of Microbial Technology for Industrial Pollution Control of 
      Zhejiang Province, College of Environment, Zhejiang University of Technology, 
      Hangzhou, China.
FAU - Yang, Xiaoliang
AU  - Yang X
AD  - Xinjiang Key Laboratory of Environmental Pollution and Bioremediation, Xinjiang 
      Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi, China.
FAU - Jin, Zhengzhong
AU  - Jin Z
AD  - Xinjiang Key Laboratory of Environmental Pollution and Bioremediation, Xinjiang 
      Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi, China.
FAU - Zhang, Daoyong
AU  - Zhang D
AD  - Key Laboratory of Microbial Technology for Industrial Pollution Control of 
      Zhejiang Province, College of Environment, Zhejiang University of Technology, 
      Hangzhou, China; Xinjiang Key Laboratory of Environmental Pollution and 
      Bioremediation, Xinjiang Institute of Ecology and Geography, Chinese Academy of 
      Sciences, Urumqi, China. Electronic address: zhangdaoyong@zjut.edu.cn.
FAU - Pan, Xiangliang
AU  - Pan X
AD  - Key Laboratory of Microbial Technology for Industrial Pollution Control of 
      Zhejiang Province, College of Environment, Zhejiang University of Technology, 
      Hangzhou, China; Xinjiang Key Laboratory of Environmental Pollution and 
      Bioremediation, Xinjiang Institute of Ecology and Geography, Chinese Academy of 
      Sciences, Urumqi, China.
LA  - eng
PT  - Journal Article
DEP - 20221022
PL  - England
TA  - Chemosphere
JT  - Chemosphere
JID - 0320657
RN  - 789U1901C5 (Copper)
RN  - 7OV03QG267 (Nickel)
RN  - 2P299V784P (Lead)
RN  - 0 (Metals, Heavy)
RN  - 0 (Carbonates)
RN  - H0G9379FGK (Calcium Carbonate)
SB  - IM
MH  - *Copper
MH  - Nickel
MH  - Lead
MH  - *Metals, Heavy
MH  - Carbonates
MH  - Calcium Carbonate
MH  - Chemical Precipitation
OTO - NOTNLM
OT  - Calcite
OT  - Heavy metals
OT  - MICP-CaO
OT  - Tailings
OT  - Ureolytic bacteria
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- 2022/10/26 06:00
MHDA- 2022/11/24 06:00
CRDT- 2022/10/25 19:22
PHST- 2022/08/22 00:00 [received]
PHST- 2022/09/27 00:00 [revised]
PHST- 2022/10/20 00:00 [accepted]
PHST- 2022/10/26 06:00 [pubmed]
PHST- 2022/11/24 06:00 [medline]
PHST- 2022/10/25 19:22 [entrez]
AID - S0045-6535(22)03474-9 [pii]
AID - 10.1016/j.chemosphere.2022.136981 [doi]
PST - ppublish
SO  - Chemosphere. 2023 Jan;311(Pt 1):136981. doi: 10.1016/j.chemosphere.2022.136981. 
      Epub 2022 Oct 22.