Efficiency of constructed wetlands in treating E. coli bacteria present in livestock wastewater

Rajan, Rajitha J; Sudarsan, J. S.; Nithiyanantham, S.

doi:10.1007/s13762-019-02481-6

Cited by 15 publications

(14 citation statements)

References 52 publications

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“…This indicates that under the evaluated conditions, plantation pattern is an influential factor in achieving higher sul2 reductions; the results were not conclusive for the other ARGs. These results are similar to those reported by Abou-kandil et al [34] and Rajan et al [58], who determined 4.5 × 10 4 copies/mL greater reductions of E. coli in polyculture systems, which may result in a more effective reduction of ARB containing sul1 and sul2. This may be because the roots of polyculture generate a matrix that allows better filtration.…”

Section: Effects Of Monoculture and Polyculturesupporting

confidence: 91%

Antibiotic-Resistant Gene Behavior in Constructed Wetlands Treating Sewage: A Critical Review

et al. 2022

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The main objective of this review is to evaluate the performance of constructed wetlands (CWs) used to reduce antibiotic-resistant genes (ARGs) during sewage treatment. To accomplish this objective, statistical and correlation analyses were performed using published data to determine the influence of operational and design parameters on ARG reduction in CWs. The effects of design and operational parameters, such as different CW configurations, seasonality, monoculture and polyculture, support medium, and hydraulic retention time (HRT), on ARG removals, were analyzed. A comparison of ARG reduction under different CW configurations showed that the hybrid configuration of surface flow (SF)–vertical subsurface flow (VSSF) achieved the highest reductions, with values of 1.55 ulog. In this case, aeration is considered an important factor to reduce ARGs in CWs, and it should be considered in future studies. However, statistical analyses showed that the ARG reductions under different CW configurations were not significant (p > 0.05). The same behavior was observed when the effects of operational factors on ARG reductions were analyzed (p > 0.05). The results of this study show that CWs are not optimal technologies to reduce ARGs in sewage. The combination of CWs with advanced wastewater technologies can be a solution for enhancing ARG reduction and reducing the spread of antibiotic resistance.

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Section: Effects Of Monoculture and Polyculturesupporting

confidence: 91%

Antibiotic-Resistant Gene Behavior in Constructed Wetlands Treating Sewage: A Critical Review

et al. 2022

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“…(2016) reported the synthesis of ZnONPs by using A. fumigatus . [ 35 ] Singh et al. (2021) performed the synthesis of ZnONPs by using A. niger .…”

Section: Resultsmentioning

confidence: 99%

“…[25] Rajan et al (2016) observed the optical peak of UV-Vis spectra at 350 nm for ZnONPs. [35] Gao et al ( 2019) obtained the UV-Vis spectral peak for mycogenic ZnONPs at 390 nm. [36]…”

Section: Uv-vis Analysis Of Znonpsmentioning

confidence: 99%

Nano‐Biofortification of Zinc in Potato (Solanum tuberosum L.) and Tomato (Solanum lycopersicum L.) Crops

Singh

Shukla

Gaurav

et al. 2023

Macromolecular Symposia

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The present study is carried out to establish the biofortification of zinc in potato (Solanum tuberosum L.) and tomato (Solanum lycopersicum L.) plants through the application of zinc oxide nanoparticles (ZnONPs). The mycogenic ZnONPs are synthesized by using Aspergillus flavus biomass and characterized to ascertain the size, shape, and concentration of synthesized nanoparticles. The ZnONPs are applied by foliar spray to the field-grown potato and tomato crops and the biofortification level is recorded by Atomic Absorption Spectroscopy (AAS). A nanotoxicity assessment is done by comparing the amount of cell death and accumulation of reactive oxygen species (ROS) in control and ZnONPs treated plants. The AAS analysis reveals significant accumulation of the zinc in leaves of potato plants but insignificant accumulation is observed in the tubers. However, a significant accumulation of zinc is observed in the leaves and fruits of the tomato plants (p ≤ 0.05). The nanotoxicity evaluation studies show comparable and statistically insignificant toxicity in control plants as compared to plants treated with ZnONPs. The study concludes that biofortification through the means of ZnONPs is a cost-effective and eco-friendly approach that can be used as an alternative to the hazardous chemical zinc fertilizers.

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“…A study was conducted on removing antibiotics and antibiotic resistance genes from wastewater by constructed wetlands, performance and microbial response, the importance of microbial communities has been documented (Liu et al, 2019). The efficiency of constructed wetlands in treating E. coli bacteria present in livestock wastewater was studied and it was evident from the study that constructed wetlands are effective in the treatment of E. coli bacteria wetland plants that are used for treatment (Rajan et al, 2020). Characterization of microbial communities in Pilot-Scale constructed wetlands with Salicornia for treatment of marine aquaculture effluents was studied and from a microorganism perspective, the findings of this study could contribute to better understanding of contaminants' removal mechanism and improved management of CWs for treatment of effluents from land-based marine aquaculture (Ma et al, 2018).…”

Section: Role Of Microbial Communities and Plants In Constructed Wetlands For Antibiotics Removalmentioning

confidence: 99%

Removal efficiency of antibiotics from water through constructed wetlands, a review

2021

Global NEST: The International Journal

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<p>Contamination in water bodies with antibiotics and resistance genes is becoming an increasing threat to global health. Overuse of antibiotics has become a serious ecological problem worldwide. There is growing concern that antibiotics are losing their effectiveness due to increased antibiotic resistance in bacteria. During the last twenty years, the consumption of antibiotics has increased rapidly, which has been cited as one of the world’s worst abusers of antibiotics. Several studies have been conducted to solve this issue. Developed countries have introduced several methods but constructed wetlands have been found low cost technology. Although constructed wetlands (CWs) offer a potential way to remove these antibiotics from water supplies, knowledge of their mechanisms is limited. In this review, we highlight important aspects of antibiotic pollution in waters, the removal efficiency of constructed wetlands for antibiotic removal and that antibiotic pollution affects many things which taken together poses several challenges for environmental scientists. It has been discovered that four main factors are affecting the performance of constructed wetlands used for the treatment of antibiotics in water supplies, the types configurations of constructed wetlands, hydraulic load rates, substrates, plants, and microorganisms. Further researches focusing on these factors are recommended to improve the removal efficiency of antibiotics in constructed wetlands. Outcomes of the study could help wastewater treatment plant engineers with providing reliable design data and outline a road map for future researches.</p>

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Efficiency of constructed wetlands in treating E. coli bacteria present in livestock wastewater

Cited by 15 publications

References 52 publications

Antibiotic-Resistant Gene Behavior in Constructed Wetlands Treating Sewage: A Critical Review

Antibiotic-Resistant Gene Behavior in Constructed Wetlands Treating Sewage: A Critical Review

Nano‐Biofortification of Zinc in Potato (Solanum tuberosum L.) and Tomato (Solanum lycopersicum L.) Crops

Removal efficiency of antibiotics from water through constructed wetlands, a review

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