PMID- 37951407
OWN - NLM
STAT- MEDLINE
DCOM- 20231127
LR  - 20240202
IS  - 1879-1298 (Electronic)
IS  - 0045-6535 (Linking)
VI  - 346
DP  - 2024 Jan
TI  - Properties and mechanisms of steel slag strengthening microbial cementation of 
      cyanide tailings.
PG  - 140645
LID - S0045-6535(23)02915-6 [pii]
LID - 10.1016/j.chemosphere.2023.140645 [doi]
AB  - The advantages of microbial induced carbonate precipitation (MICP) as 
      bio-cementation technology for tailings-solidification are under extensive 
      investigation. In order to improve performance of bio-cementation, many 
      strengthening materials were applied to the bio-cementation of tailings. Steel 
      slag (SS) is a kind of industrial solid waste, its chemical composition and 
      mineral composition are similar to cement, and it has a certain application 
      prospect as an auxiliary cementing material. In this study, the properties and 
      mechanism of SS strengthening MICP cementation of cyanide tailings (CT) were 
      investigated. The results showed that Sporosarcina pasteurii growth is not 
      inhibited by SS, and Sporosarcina pasteurii can promote the hydration reaction of 
      SS, providing a suitable alkaline environment and Ca(2+), promoting the 
      production of more CaCO(3) in the MICP process. When 200 mL of CT leachate was 
      added 1.4 g SS (200-400 mesh), the adsorption of Cu, Pb, Zn, Cd, total cyanide 
      (T-CN), and free cyanide (F-CN) reached 48.05%, 44.28%, 36.25%, 16.67%, 79.05%, 
      and 67.20%, respectively. The maximum unconfined compressive strength（UCS） of the 
      cemented body (with 5%, 150 mesh SS) was 1.97 MPa, which was 3.396 times as high 
      as that without SS. The cemented body with the addition of SS (5%, 150 mesh) 
      contained more carbonate bound Cu (2.75%), Pb (4.89%), Zn (5.37%), and Cd 
      (5.75%), and less exchangeable Cu (3.65%), Pb (6.85%), Zn (2.27%), and Cd (4.42%) 
      than that without SS. In summary, the addition of SS improved the UCS of cemented 
      bodies and the stability of heavy metals and cyanide, reduced the environmental 
      risks existing in the process of CT storage. Meanwhile, it also provides new 
      ideas for resource utilization of industrial solid waste SS and improvement of 
      mine filling materials.
CI  - Copyright (c) 2023 Elsevier Ltd. All rights reserved.
FAU - Zou, Chang-Xiong
AU  - Zou CX
AD  - College of Energy and Environment, Inner Mongolia University of Science and 
      Technology, Baotou, 014010, China.
FAU - Xiao, Meng
AU  - Xiao M
AD  - College of Energy and Environment, Inner Mongolia University of Science and 
      Technology, Baotou, 014010, China.
FAU - Jiang, Qing-Hong
AU  - Jiang QH
AD  - College of Energy and Environment, Inner Mongolia University of Science and 
      Technology, Baotou, 014010, China.
FAU - Wang, Zhe
AU  - Wang Z
AD  - College of Energy and Environment, Inner Mongolia University of Science and 
      Technology, Baotou, 014010, China.
FAU - Zheng, Chun-Li
AU  - Zheng CL
AD  - School of Resources and Environmental Engineering, Shanghai Polytechnic 
      University, Shanghai, 200000, China. Electronic address: clzheng@sspu.edu.cn.
FAU - Wang, Wei-da
AU  - Wang WD
AD  - School of Civil Engineering, Yancheng Institute of Technology, Yancheng, 224001, 
      China. Electronic address: wwdf123@ycit.edu.cn.
LA  - eng
PT  - Journal Article
DEP - 20231109
PL  - England
TA  - Chemosphere
JT  - Chemosphere
JID - 0320657
RN  - 0 (Solid Waste)
RN  - 12597-69-2 (Steel)
RN  - 0 (Cyanides)
RN  - 00BH33GNGH (Cadmium)
RN  - 2P299V784P (Lead)
RN  - 0 (Metals, Heavy)
RN  - 0 (Carbonates)
RN  - H0G9379FGK (Calcium Carbonate)
RN  - Sporosarcina pasteurii
SB  - IM
MH  - *Solid Waste
MH  - Steel
MH  - Cementation
MH  - Cyanides
MH  - Cadmium
MH  - Lead
MH  - *Metals, Heavy/chemistry
MH  - Carbonates/chemistry
MH  - Calcium Carbonate
OTO - NOTNLM
OT  - Cyanide tailings
OT  - Heavy metals
OT  - MICP
OT  - Steel slag
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- 2023/11/12 00:41
MHDA- 2023/11/27 12:42
CRDT- 2023/11/11 19:16
PHST- 2023/03/23 00:00 [received]
PHST- 2023/09/20 00:00 [revised]
PHST- 2023/11/06 00:00 [accepted]
PHST- 2023/11/27 12:42 [medline]
PHST- 2023/11/12 00:41 [pubmed]
PHST- 2023/11/11 19:16 [entrez]
AID - S0045-6535(23)02915-6 [pii]
AID - 10.1016/j.chemosphere.2023.140645 [doi]
PST - ppublish
SO  - Chemosphere. 2024 Jan;346:140645. doi: 10.1016/j.chemosphere.2023.140645. Epub 
      2023 Nov 9.