Bacterial mobilization and transport through manure enriched soils: Experiment and modeling

Sepehrnia, Nasrollah; Memarianfard, L.; Moosavi, Ali Akbar; Bachmann, Jörg; Guggenberger, Georg; Rezanezhad, Fereidoun

doi:10.1016/j.jenvman.2017.07.009

Cited by 36 publications

(28 citation statements)

References 57 publications

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“…Several studies applied ANNs to predict the concentration or emission of one or more air pollutants in an area (9,27,28,(30)(31)(32)(33)(34). They applied various methodologies to forecast future air pollution conditions, as well as climate change impacts on air quality.…”

Section: Discussionmentioning

confidence: 99%

Simulation of Climate Change Impact on Emergency Medical Services Clients Caused by Air Pollution

et al. 2018

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Background: Climate change and air pollution are linked. Both of them are expected to impact human health. Climate can increase health risks from poor air quality and lead to emergencies. Forecasting health consequences of air pollution episodes is a matter of great concern. Objectives: The current study mainly aimed at simulating the climate change impact on emergency medical services (EMS) clients caused by air pollution to estimate the future trend of EMS clients with cardiovascular and respiratory symptoms by 2050. Methods: Future climate pattern was projected using general circulation model outputs under the scenario of two representative concentration pathways (RCP2.6 and RCP8.5). Statistical downscaling was performed by LARS weather generator to produce highresolution synthetic time series weather dataset. Simulation was performed using an artificial neural network (ANN). Observed climate and air pollutant variables were tagged as predictors in ANN, and EMS clients were considered as the target. Projected future (2020-2050) climate and air pollution were applied to estimate the future trend of EMS clients. Results: The climate pattern was predicted to become warmer and wetter in the study area (Tehran, Iran). Annual trend of EMS clients with cardiovascular and respiratory symptoms increases under both RCP scenarios. Further increase is under RCP8.5 for EMS clients with cardiovascular symptoms, and the least increase is under RCP2.6 for those with respiratory symptoms. Annual and monthly trends of EMS clients with cardiovascular and respiratory problems are more sensitive to different groups of climate and air pollution variables. Conclusions: ANN is an executive tool to simulate the impact of climate change and air pollution on public health to estimate the future trend of related morbidity and forecast short-term cases across the world.

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Section: Discussionmentioning

confidence: 99%

Simulation of Climate Change Impact on Emergency Medical Services Clients Caused by Air Pollution

et al. 2018

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“…The effluent bacteria from the leaching experiment were recovered by plate-count method (Swanson et al, 1992;Guber et al, 2006) according to previous studies by Sepehrnia et al (2017Sepehrnia et al ( , 2018. One mL of the effluents was poured into 9 ml sterilized distilled water, diluted (e.g.,1,000 and 10,000 times), and 0.1 ml of diluted sample plated on Eosin Methylene Blue (EMB) and incubated at 37 C for 18-24 h. The viable cells grown (i.e., greenish metallic sheen) on the medium culture plates were counted and the concentrations of bacteria were reported based on the colony forming units (CFUs) of fecal coliforms per 1 ml (CFU mL À1 ) (Swanson et al, 1992;Guber et al, 2006).…”

Section: Cell Recoverymentioning

confidence: 99%

“…In general, manures are considered solid with a dry solid content above 20% (Blaustein et al, 2015). Woody, soluble, and colloidal materials with a broad size and distribution mainly constitute solid manures (Hafez et al, 1974;Sepehrnia et al, 2017Sepehrnia et al, , 2018. The composition depends on type, age, and nutrition of animal, bedding materials, carbon compounds, storage conditions, etc.…”

Section: Introductionmentioning

confidence: 99%

“…However, accurately estimating and determining the initial bacteria concentration in prepared suspensions and/or liquid manures (i.e., slurry) is still a big challenge in bacteria transport studies as a precondition to estimating and managing microbial water quality (Guber et al, 2005;2007a,b, 2013). This will be even more problematic if the solid manures are considered a source of pollution because heterogeneities in such complex media influence cell release from solid bulk and govern cell transport, retention, and release through soil (Blaustein et al, 2015(Blaustein et al, , 2016Sepehrnia et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

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Particle fractionation controls Escherichia coli release from solid manure

Sepehrnia

Tabatabaei

Norouzi

et al. 2021

Heliyon

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Bacteria transport through soil is a complex process particularly when the cells are released from solid manures and co-transported with particles. This study focuses on understanding of the Escherichia coli release from different particle fractions (0.25-, 0.5-, 1-, and 2-mm) of solid manure and evaluating different influent boundary conditions during cell release from manure and when a solid manure is applied to the soil. The 0.25-mm and 2-mm particle sizes resulted a greater cell release compared to 0.5-mm and 1-mm fractions (p < 0.05). The shape and magnitude of the cell release curves (CRCs) from the original manure bulk were mainly influenced by the two 0.25-mm and 2-mm fractions, respectively. The arithmetic mean for normalizing the CRCs and the time variablebased normalized CRCs for the manure-treated soil were the robust variables in evaluation of the experimental data. However, a single maximum bacteria concentration could provide the realistic dataset for the modeling process. Evaluation of the root-mean-squared-error and Akaike criterion showed that the two-and threeparametric models are recommended for simulating the cell release from solid manure in comparison with one parametric models. This study also suggests considering separate microbial release evaluations, with regards to influent concentration, for manure and manure-treated soils to propose best management practices for controlling bacteria pollution. Further research will reveal the key roles of different woody components and soluble material ratios for the various solid manures in bacteria release.

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“…Indeed, the two groups of germs are hosts of the digestive tract, with the difference that the faecal coliforms testify to a recent faecal contamination while the faecal streptococci, more resistant in the environment, testify to an old faecal contamination (Trevisan et al, 2002). Their presence in water marks faecal contamination from household waste water, toilets built near used water sources, individual deposits, and/or soil contamination (Gondim et al, 2016;Sepehrnia et al, 2017).…”

Section: Water Treatment and Bacteriological Analysis Of Sampled Watermentioning

confidence: 99%

Treatment of mangrove and well contaminated water using activated charcoal from coconut shell in Douala, Cameroon

Nguema¹,

Efon²,

Mounir³

et al. 2020

Afr. J. Biotechnol.

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The main objective of this study was to evaluate the contribution of activated carbon, based on coconut shell, in the treatment of mangrove and well contaminated water from the BONAPRISO district. More precisely, it consisted of preparing the activated carbon, then characterizing the mangrove water and the well water through a manual of sampling procedure; and finally verifying that the activated carbon produced had a good capacity for absorption of bacteria contained in the different sampled waters. Therefore, it emerged from this study that the activated carbon produced from coconut pods carbonized at 561°C, ground and activated at 443°C, had a specific surface of 658 m 2 /g and pore sizes of 20 µm. Thereafter the various waters characterized showed a yellowish coloration for well water and whitish for mangrove water, a pH ranging from 6.5 and 6.8, respectively; and the total flora had a total load of 2.18×10 5 CFU/ml for well water and a total load of 3.24×10 5 CFU/ml for mangrove water. Finally, the effectiveness of activated carbon in fixing bacteria, such as total flora, streptococci, and faecal coliforms showed that it was adsorbed in well water: 86.45% total flora; 91.67% streptococci; 100% faecal coliforms, and therefore, acted at 92.7%. Similarly, in mangrove water, there is 51.22% of total flora, 100% streptococci, and 92.4% faecal coliforms were fixed and, therefore, acted at 81.20%. The remaining bacteria, in well water (13.55% total flora; 8.33% streptococci) and in mangrove water (48.78% total flora; 7.6% faecal coliforms), respectively, could not be fixed.

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Bacterial mobilization and transport through manure enriched soils: Experiment and modeling

Cited by 36 publications

References 57 publications

Simulation of Climate Change Impact on Emergency Medical Services Clients Caused by Air Pollution

Simulation of Climate Change Impact on Emergency Medical Services Clients Caused by Air Pollution

Particle fractionation controls Escherichia coli release from solid manure

Treatment of mangrove and well contaminated water using activated charcoal from coconut shell in Douala, Cameroon

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