Combined effects of seasonality and stagnation on tap water quality: Changes in chemical parameters, metabolic activity and co-existence in bacterial community

Zhang, Haihan; Xu, Lei; Huang, Tinglin; Yan, Miaomiao; Liu, Kaiwen; Miao, Yutian; He, Hao; Li, Sulin; Sekar, Raju

doi:10.1016/j.jhazmat.2020.124018

Cited by 78 publications

(30 citation statements)

References 53 publications

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“…The bacterial community structure in winter and summer was significantly different at the genus level. Studies have shown that seasonal variations and cultivation of different plants have a great impact on changes in the bacterial community structure of CWs and are particularly evident at the genus level [48,49], consistent with the results of the present study. Sphingomonas is a Gram-negative bacterium that belongs to the Alphaproteobacte class (phylum Proteobacteria).…”

Section: Bacterial Community At the Phylum Level In Both Seasons And ...supporting

confidence: 93%

Purification Effects on β-HCH Removal and Bacterial Community Differences of Vertical-Flow Constructed Wetlands with Different Vegetation Plantations

et al. 2021

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This study aimed to investigate the removal of β-hexachlorocyclohexane (β-HCH) at realistic concentration levels (10 µg/L) in different plant species in constructed wetlands (Acorus calamus, Canna indica, Thalia dealbata, and Pontederia cordata) and the structure of the rhizosphere microbial community response of each group during summer and winter. Results showed that all groups of constructed wetlands had very good decontamination efficiency against β-HCH in water (90.86–98.17%). The species that most efficiently purified β-HCH in water was A. calamus in summer (98.17%) and C. indica in winter (96.64%). Substrate sorption was found to be the major pathway for β-HCH removal from water in the constructed wetlands. The ability of the wetland plants to absorb and purify β-HCH was limited, and C. indica had the strongest absorptive capacity among the four plant species. The mean β-HCH removal from the matrix of the planted plants increased by 5.8% compared with that of the control treatment (unplanted plants). The average β-HCH content in the plant rhizosphere substrate was 4.15 µg/kg lower than that in the non-rhizosphere substrate. High-throughput sequencing analysis revealed significant differences (P < 0.05) in the Chao1 and ACE indices of microbes in the substrate of four wetlands during summer and winter. At the genus level, the constructed wetlands with vegetation plantations showed higher microbial abundance than the constructed wetlands without vegetation plantations. In winter, the bacterial community structure of each constructed wetland was quite different, but no dominant flora in the bacterial community structure obviously changed. In summer, the bacterial community structure at the same stage was relatively small. The abundance of Actinobacteria and Sphingomonas remarkably increased over time in summer.

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Section: Bacterial Community At the Phylum Level In Both Seasons And ...supporting

confidence: 93%

Purification Effects on β-HCH Removal and Bacterial Community Differences of Vertical-Flow Constructed Wetlands with Different Vegetation Plantations

et al. 2021

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“…However, stagnation, which is defined as intermittent water use at individual outlets for an extended period, may occur in premise plumbing, causing longer incubation times ( Proctor and Hammes, 2015 ; Rhoads and Hammes, 2021 ). It reduces disinfectant levels, allows microbial regrowth, and, thus, changes the microbial community composition in drinking water ( Lautenschlager et al , 2010 ; Zhang et al , 2021b ).…”

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confidence: 99%

“…Intact cell counts and heterotrophic plate counts (HPC) were shown to increase after overnight stagnation in premise plumbing ( Lautenschlager et al , 2010 ). Furthermore, the significant decay of free chlorine after stagnation caused total cell counts (TCC) to increase ( Ling et al , 2018 ; Zhang et al , 2021b ). Increases in water temperature and biofilm detachment were also found to promote microbial growth during stagnation ( Zlatanovic et al , 2017 ; Bedard et al , 2018 ; Peng et al , 2020 ; Zhang et al , 2021a ).…”

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confidence: 99%

“…Previous studies characterized microbial community compositions in premise plumbing and evaluated their dynamics under stagnation ( Lautenschlager et al , 2010 ; Ling et al , 2018 ; Zhang et al , 2021b ). Some genera, including Methylobacterium spp., Sphingomonas spp., Sphingobium spp., Mycobacterium spp., and Pseudomonas spp., increased after stagnation ( Zhang et al , 2021a ; 2021b ). Ley et al (2020) reported a positive correlation between Legionella spp.…”

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confidence: 99%

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Dynamics of the Microbial Community and Opportunistic Pathogens after Water Stagnation in the Premise Plumbing of a Building

et al. 2022

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In premise plumbing, microbial water quality may deteriorate under certain conditions, such as stagnation. Stagnation results in a loss of disinfectant residual, which may lead to the regrowth of microorganisms, including opportunistic pathogens. In the present study, microbial regrowth was investigated at eight faucets in a building over four seasons in one year. Water samples were obtained before and after 24 h of stagnation. In the first 100‍ ‍mL after stagnation, total cell counts measured by flow cytometry increased 14- to 220-fold with a simultaneous decrease in free chlorine from 0.17–0.36‍ ‍mg L –1 to <0.02‍ ‍mg L –1 . After stagnation, total cell counts were not significantly different among seasons; however, the composition of the microbial community varied seasonally. The relative abundance of Pseudomonas spp. was dominant in winter, whereas Sphingomonas spp. were dominant in most faucets after stagnation in other seasons. Opportunistic pathogens, such as Legionella pneumophila , Mycobacterium avium , Pseudomonas aeruginosa , and Acanthamoeba spp., were below the quantification limit for real-time quantitative PCR in all samples. However, sequences related to other opportunistic pathogens, including L. feeleii , L. maceachernii , L. micdadei , M. paragordonae , M. gordonae , and M. haemophilum , were detected. These results indicate that health risks may increase after stagnation due to the regrowth of opportunistic pathogens.

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“…However, the irrigation water for facility agriculture in this area mainly comes from groundwater, and the progress in the exploitation of groundwater resources aggravates the water resource crisis in this region [5][6][7]. Therefore, under the background of the sharp increase in atmospheric carbon emissions and the shortage of water resources [8], it is of great significance to explore the water-saving technology of facility agriculture for crop growth and soil carbon cycling.…”

Section: Introductionmentioning

confidence: 99%

Effects of Micropore Group Spacing and Irrigation Amount on Soil Respiration and Yield of Tomato with Microsprinkler Irrigation under Plastic Film in Greenhouse

et al. 2021

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Microsprinkler irrigation under a plastic film in the greenhouse (MSPF) is a water-saving way which adopts the porous discharge form of a pipe under the plastic film. The effects of different micropore group spacings (L1:30 cm, L2: 50 cm) and irrigation amounts [I1: 0.7 Epan; I2: 1.0 Epan; and I3: 1.2 Epan (Epan is the diameter of 20 cm standard pan evaporation, mm)] of the MSPF on the soil respiration and yield of tomato were studied. A completely randomized trial design was used, and drip irrigation under plastic film (CK1) and microsprinkler irrigation (CK2) were also used as controls. The results showed that under the same irrigation amount, the soil respiration rate, tomato yield, and water use efficiency (WUE) of MSPF in spring and autumn are 8.09% and 6.74%, 19.39% and 4.54%, and 10.03% and 2.32% higher than those of CK1, respectively; they are significantly increased by 31.02% and 20.46%, 49.22% and 38.38%, and 58.05% and 34.66% compared with those of CK2, respectively, indicating that MSPF increased the amount of CO2 emission, but tomato yield and WUE were effectively improved, and a dynamic balance was reached among them. Compared with the 50 cm micropore group spacing, the spring and autumn tomato yields and WUE under the 30 cm micropore group spacing were significantly increased by 16.00% and 13.01% and 20.85% and 14.25%, respectively, and the micropore group spacing had no significant effect on the soil respiration rate in both root and nonroot zones. When the I increased from 0.7 Epan to 1.2 Epan, the soil respiration rate and yield in the root and nonroot zones of the spring and autumn tomatoes increased at first and then decreased, and the WUE showed a decreasing trend. The relationship of soil respiration rate between the nonroot and root zones obeys a logarithmic function, and the soil respiration rate in the nonroot zone has a quadratic curve relationship with the yield of tomato. This study can provide data support for the development of water-saving irrigation and yield increase of facility agricultural tomato and the analysis of the soil carbon cycling mechanism.

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Combined effects of seasonality and stagnation on tap water quality: Changes in chemical parameters, metabolic activity and co-existence in bacterial community

Cited by 78 publications

References 53 publications

Purification Effects on β-HCH Removal and Bacterial Community Differences of Vertical-Flow Constructed Wetlands with Different Vegetation Plantations

Purification Effects on β-HCH Removal and Bacterial Community Differences of Vertical-Flow Constructed Wetlands with Different Vegetation Plantations

Dynamics of the Microbial Community and Opportunistic Pathogens after Water Stagnation in the Premise Plumbing of a Building

Effects of Micropore Group Spacing and Irrigation Amount on Soil Respiration and Yield of Tomato with Microsprinkler Irrigation under Plastic Film in Greenhouse

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