PMID- 38114705 OWN - NLM STAT- MEDLINE DCOM- 20240122 LR - 20240202 IS - 1614-7499 (Electronic) IS - 0944-1344 (Linking) VI - 31 IP - 4 DP - 2024 Jan TI - Potential use of two Serratia strains for cadmium remediation based on microbiologically induced carbonate precipitation and their cadmium resistance. PG - 5319-5330 LID - 10.1007/s11356-023-31062-x [doi] AB - Cadmium (Cd) presence and bioavailability in soils is a serious concern for cocoa producers. Cocoa plants can bioaccumulate Cd that can reach humans through the food chain, thus posing a threat to human health, as Cd is a highly toxic metal. Currently, microbiologically induced carbonate precipitation (MICP) by the ureolytic path has been proposed as an effective technique for Cd remediation. In this work, the Cd remediation potential and Cd resistance of two ureolytic bacteria, Serratia sp. strains 4.1a and 5b, were evaluated. The growth of both Serratia strains was inhibited at 4 mM Cd(II) in the culture medium, which is far higher than the Cd content that can be found in the soils targeted for remediation. Regarding removal efficiency, for an initial concentration of 0.15 mM Cd(II) in liquid medium, the maximum removal percentages for Serratia sp. 4.1.a and 5b were 99.3% and 99.57%, respectively. Their precipitates produced during Cd removal were identified as calcite by X-ray diffraction. Energy dispersive X-ray spectroscopy analysis showed that a portion of Cd was immobilized in this matrix. Finally, the presence of a partial gene from the czc operon, involved in Cd resistance, was observed in Serratia sp. 5b. The expression of this gene was found to be unaffected by the presence of Cd(II), and upregulated in the presence of urea. This work is one of the few to report the use of bacterial strains of the Serratia genus for Cd remediation by MICP, and apparently the first one to report differential expression of a Cd resistance gene due to the presence of urea. CI - (c) 2023. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature. FAU - Diez-Marulanda, Juan C AU - Diez-Marulanda JC AUID- ORCID: 0000-0003-2986-3072 AD - Universidad Nacional de Colombia - Sede Bogota, Facultad de Ciencias, Departamento de Quimica, Grupo de Estudios para la Remediacion y Mitigacion de Impactos Negativos al Ambiente (GERMINA), Av. Carrera 30 # 45-03, 111321, Bogota, Colombia. jcdiezm@unal.edu.co. FAU - Brandao, Pedro F B AU - Brandao PFB AUID- ORCID: 0000-0002-4297-8264 AD - Universidad Nacional de Colombia - Sede Bogota, Facultad de Ciencias, Departamento de Quimica, Grupo de Estudios para la Remediacion y Mitigacion de Impactos Negativos al Ambiente (GERMINA), Av. Carrera 30 # 45-03, 111321, Bogota, Colombia. LA - eng GR - 37691/Direccion de Investigacion, Universidad Nacional de Colombia/ GR - 48328/Direccion de Investigacion, Universidad Nacional de Colombia/ GR - 110180863795/CT-190-2019/Departamento Administrativo de Ciencia, Tecnologia e Innovacion (COLCIENCIAS)/ PT - Journal Article DEP - 20231219 PL - Germany TA - Environ Sci Pollut Res Int JT - Environmental science and pollution research international JID - 9441769 RN - 00BH33GNGH (Cadmium) RN - 0 (Carbonates) RN - H0G9379FGK (Calcium Carbonate) RN - 0 (Soil) RN - 8W8T17847W (Urea) SB - IM MH - Humans MH - *Cadmium/metabolism MH - *Serratia/metabolism MH - Carbonates/chemistry MH - Calcium Carbonate/chemistry MH - Soil/chemistry MH - Urea/metabolism OTO - NOTNLM OT - Bioremediation OT - Cadmium OT - Czc genes OT - MICP OT - Serratia sp. OT - Urease EDAT- 2023/12/20 06:42 MHDA- 2024/01/22 06:42 CRDT- 2023/12/19 23:49 PHST- 2023/05/16 00:00 [received] PHST- 2023/11/11 00:00 [accepted] PHST- 2024/01/22 06:42 [medline] PHST- 2023/12/20 06:42 [pubmed] PHST- 2023/12/19 23:49 [entrez] AID - 10.1007/s11356-023-31062-x [pii] AID - 10.1007/s11356-023-31062-x [doi] PST - ppublish SO - Environ Sci Pollut Res Int. 2024 Jan;31(4):5319-5330. doi: 10.1007/s11356-023-31062-x. Epub 2023 Dec 19.