AI Article Synopsis
- Electrolytic manganese residue (EMR) contains toxic heavy metals like Mn, Zn, Cu, and Cd, which can harm the environment.
- The study tested the combined effects of two bacteria, Pseudomonas putida and Pseudomonas alcaligenes, finding that their synergy improved the stability and precipitation of Mn ions compared to using each one alone.
- After 12 days of fermentation, nearly all Mn ions were removed, and the levels of Zn, Cu, and Cd decreased significantly, suggesting this method could be an eco-friendly approach to manage EMR.
Article Abstract
Electrolytic manganese residue (EMR) contains a significant amount of Mn ions as well as Zn, Cu and Cd ions, which have negative environmental impacts due to their toxicity. This study aims to investigate the effects of Pseudomonas putida (P. putida) and Pseudomonas alcaligenes (P. alcaligenes) on the stabilization of heavy metal ions in both simulated solutions and the EMR. The results demonstrated that the synergy of P. putida and P. alcaligenes was more effective than either P. putida or P. alcaligenes alone in stabilizing Mn ions. However, the presence of higher concentration of Zn, Cu and Cd ions in the simulated solution weakened the stabilization effect of Mn ions. Fortunately, when P. putida and P. alcaligenes were synergized together, they exhibited a stronger performance in stabilizing heavy metal ions present in the EMR compared to the bacteria employed alone. After 12 days of fermentation in the EMR slurry, almost all Mn ions were eliminated through the formation of deposits, while the concentrations of Zn, Cu and Cd ions decreased to 0.28 mg/L, 0.2 mg/L and 0.1 mg/L respectively after 10 days fermentation. Under the synergy of P. putida and P. alcaligenes, soluble components such as MnSO·HO, (NH)Mn(SO)·6 HO and Zn, Cu and Cd compounds from the EMR were transformed into insoluble compounds including (MnCO, Mn(PO)·3 HO, MnZn(PO)·4 HO, MnFe(PO)(OH)·8 HO), CuZn(PO)(OH)·HO and Cd(OH)) for the stabilization of heavy metals ions in the EMR. This study proposes an eco-friendly and low-cost method for rendering EMR harmless through pretreatment.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.ecoenv.2024.117462 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Stabilizing behaviors of Pseudomonas putida and Pseudomonas alcaligenes bacteria on heavy metal ions in electrolytic manganese residue.
Ecotoxicol Environ Saf
December 2024
College of Chemistry and Chemical Engineering, Anshun University, Anshun, Guizhou 561000, PR China; Key Laboratory of Agricultural Resources and Environment in High Education Institute of Guizhou Province, Anshun University, Anshun, Guizhou 561000, PR China.
Article Synopsis
- Electrolytic manganese residue (EMR) contains toxic heavy metals like Mn, Zn, Cu, and Cd, which can harm the environment.
- The study tested the combined effects of two bacteria, Pseudomonas putida and Pseudomonas alcaligenes, finding that their synergy improved the stability and precipitation of Mn ions compared to using each one alone.
- After 12 days of fermentation, nearly all Mn ions were removed, and the levels of Zn, Cu, and Cd decreased significantly, suggesting this method could be an eco-friendly approach to manage EMR.
Incidence, Clinical Profile, and Management of Keratitis Caused by Uncommon Species of Pseudomonas at a Tertiary Eye Care Center.
Cornea
March 2023
Department of Ocular Microbiology, Aravind Eye Hospital & PG Institute of Ophthalmology, Madurai, Tamil Nadu, India; and.
Purpose: The purpose of this study was to study the incidence, demographic features, clinical course, profiling, and management of uncommon species of Pseudomonas keratitis (other than Pseudomonas aeruginosa ) at a tertiary eye care center.
Methods: Thirty cases of culture-proven uncommon species of Pseudomonas keratitis between January 2017 and December 2021 were retrospectively studied. The incidence, demographic and clinical profile, predisposing factors, microbial results, treatment, and visual outcomes were analyzed.
Conventional tobacco products harbor unique and heterogenous microbiomes.
Environ Res
March 2023
Maryland Institute of Applied Environmental Health, School of Public Health, University of Maryland, College Park, MD, USA. Electronic address:
Article Synopsis
- A study was conducted to analyze the bacterial communities in various tobacco products, including cigarettes, little cigars, cigarillos, and hookah, as well as a research cigarette product.
- The researchers extracted DNA from 414 samples and sequenced a specific gene region to identify the bacteria present, focusing on metabolically-active (live) cells in a subset of 56 samples.
- Key findings showed distinct microbiomes for each tobacco product, with specific bacteria linked to each type, including concerns about the presence of harmful pathogens in commercial products.
Phosphate solubilizing epilithic and endolithic bacteria isolated from clastic sedimentary rocks, Murree lower Himalaya, Pakistan.
Arch Microbiol
May 2022
Department of Microbiology, Faculty of Biological Sciences, Quaid-I-Azam University, Islamabad, 45320, Pakistan.
Rock microbes are capable to solubilize phosphate present in the rocks.. In this study, we focused on the isolation of phosphate solubilizing bacteria from rocks of Murree, Pakistan.
View Article and Find Full Text PDFSimultaneous biodegradation of dimethyl sulfide and 1-propanethiol by Pseudomonas putida S-1 and Alcaligenes sp. SY1: "Lag" cause, reduction, and kinetics exploration.
Environ Sci Pollut Res Int
July 2022
Department of Environmental Science and Engineering, School of Petrochemical Engineering & Environment, Zhejiang Ocean University, Zhoushan, 316004, China.
Simultaneous biodegradation of malodorous 1-propanethiol (PT) and dimethyl sulfide (DMS) by Pseudomonas putida S-1 and Alcaligenes sp. SY1 was investigated and the interactions implicated were explored. Results showed that PT was completely degraded in 33 h, while a lag of 10 h was observed for DMS degradation alone, and the lag was even extended to 81 h in the binary mixture.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!