Aims: We investigated the combined effects of pipe materials and disinfection chemicals on bacterial community and its active RNA fraction in water and biofilms in a pilot-scale premise plumbing system.
Methods And Results: The changes in bacterial communities were studied within four pipelines using copper and cross-linked polyethylene (PEX) pipe with chlorine or chloramine disinfection. The total and active bacterial communities and the presence of opportunistic pathogens (Legionella spp. and Mycobacterium spp.) were analyzed using 16S rRNA (gene) amplicon sequencing. The dominant classes were Alphaproteobacteria (31%) and Gammaproteobacteria (24%). Class Planctomycetia was increased in active fraction of chlorinated waters and PEX pipe biofilms and decreased in chloraminated waters and copper pipe biofilms. The alpha diversity of the active fractions in biofilms were highest in chloraminated PEX pipe samples (Chao1 mean = 163, p < 0.05, Kruskal-Wallis). Legionella spp. was more abundant and active in waters treated with chlorine than chloramine.
Conclusions: Disinfectant had a stronger impact than pipe material on the bacterial community composition in water. A combined effect of pipe material and disinfectant was more evident on the composition and activity of the biofilm communities than the individual effect of copper, PEX, chlorine, or chloramine.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1093/jambio/lxaf004 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Sepiolite immobilizes soil Cd to optimize microbial community structure thereby promoting wheat growth and reducing Cd accumulation.
Ecotoxicol Environ Saf
January 2025
College of Resources, Sichuan Agricultural University, Chengdu 611130, China.
Immobilization remediation is a widely employed technology that effectively reduces the migration rate and bioavailability of cadmium (Cd). Sepiolite, a commonly used remediation agent, has proven effective in decreasing soil Cd availability and reducing Cd accumulation in agricultural products. However, further investigation is needed to understand the impact of sepiolite on soil environmental quality and microbial communities.
View Article and Find Full Text PDFSynthetic peptides bioactive against phytopathogens have lower impact on some beneficial bacteria: An assessment of peptides biosafety in agriculture.
J Environ Manage
January 2025
iB(2) Laboratory, Department of Biology, Faculty of Sciences, University of Porto, Portugal; Instituto de Conservación y Mejora de la Agrodiversidad Valenciana, Universitat Politècnica de València, Spain; LAQV-REQUIMTE, Department of Biology, Faculty of Sciences, University of Porto, Portugal. Electronic address:
The emergence of bacterial resistance and the increasing restrictions on the use of agrochemicals are boosting the search for novel, sustainable antibiotics. Antimicrobial peptides (AMPs) arise as a new generation of antibiotics due to their effectiveness at low doses and biocompatibility. We compared the antimicrobial activity of four promising AMPs (CA-M, BP100, RW-BP100, and 3.
View Article and Find Full Text PDFWater-soluble carboxymethyl chitosan and rhamnolipids promote the remediation of Cd-contaminated soil by mediating the growth of Hylotelephium spectabile and regulating the rhizospheric ecological environment.
J Hazard Mater
January 2025
Center for Environmental Remediation, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China.
The application of biodegradable chelating agents in phytoremediation is a promising approach. This study aimed to investigate the effects and roles of underlying mechanisms of water-soluble carboxymethyl chitosan (WSCC) and rhamnolipids (RLs) on the remediation of Cd-contaminated soil by Hylotelephium spectabile. WSCC and RLs mediated the growth of H.
View Article and Find Full Text PDFAerobic composting with hydrothermal carbonization aqueous phase conditioning: Stabilized active gaseous nitrogen emissions.
J Hazard Mater
January 2025
Key Laboratory of Agro-Environment in Downstream of Yangtze Plain, National Agricultural Experiment Station for Agricultural Environment (Luhe), Ministry of Agriculture and Rural Affairs; Institute of Agricultural Resources and Environment, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China.
The losses of reactive gaseous nitrogen (N), including ammonia (NH) and nitrous oxide (NO), represent a pressing environmental issue during composting. However, the impact of hydrothermal carbonization aqueous phase (HAP) on compost gaseous N emissions and the underlying mechanisms remain largely unexplored. Herein, Quercus acutissima leaves-derived HAP and its modified HAP (MHAP) were added to the chicken manure compost at 5 % (w/w) and 10 % (w/w) applied rates to observe changes in NH and NO fluxes, compost properties and bacterial communities.
View Article and Find Full Text PDFInteractions between fungi and bacteria hosts carrying MGEs is dominant for ARGs fate during manure mesophilic composting.
Waste Manag
January 2025
Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resources and Environmental Science, China Agricultural University, Beijing 100193, China. Electronic address:
The mycelial networks of fungi promote the interaction between the originally isolated bacteria, thereby potentially enhancing the exchange of nutrients and the horizontal transfer of genetic materials. However, the driving effect of fungi on antibiotic resistance genes (ARGs) during mesophilic facultative composting is still unclear. This study aims to elucidate the changes in ARGs and underlying mechanisms during the mesophilic composting of manure.
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!