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Proceedings ArticleDOI

Role of Wetland Soil Bacteria in Enhancing the Phytoremediation Process through Bioavailability Phenomenon

16 May 2019-pp 1-10
About: The article was published on 2019-05-16. It has received 8 citations till now. The article focuses on the topics: Phytoremediation.
Citations
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Journal ArticleDOI
TL;DR: Results suggesting that rhizobacteria has good potential to restore Fe and Al contaminated water in general and particularly for mining wastewater are suggested.

45 citations

Journal ArticleDOI
01 Sep 2020-Heliyon
TL;DR: Development of the design of the ex-situ soil phytoremediation reactors is suggested as a future research direction because it can significantly enhance the current obtained finding.

32 citations


Cites background from "Role of Wetland Soil Bacteria in En..."

  • ...which can then be extracted by plants (Mohan and Tippa, 2019)....

    [...]

Journal ArticleDOI
TL;DR: In this article, the authors analyzed the effectiveness of pilot-scale vertical subsurface flow constructed wetland (VSSFCW) planted with Scirpus grossus using an aeration system for simultaneous removal of ibuprofen, chemical oxygen demand (COD) and nutrients (NH3N, NO3-N, and PO4-P) from domestic wastewater.
Abstract: Pharmaceutical compounds in wastewater are currently becoming emerging concern as the utilization of drugs in anthropogenic activities. This research analyzed the effectiveness of pilot-scale vertical subsurface flow constructed wetland (VSSFCW) planted with Scirpus grossus using an aeration system for simultaneous removal of ibuprofen, chemical oxygen demand (COD) and nutrients (NH3-N, NO3-N, and PO4-P) from domestic wastewater. The constructed wetland (CW) platforms (500 L capacity) filled with gravel and sand and planted with native species of S. grossus were used to treat pharmaceutical content in domestic wastewater continuously for 21 days. Three experiments were performed with hydraulic retention time (HRT) of 3, 4 and 5 days. Aeration rates of 0, 1, and 2 L/min were employed for each HRT. The combined effect of HRT, exposure period, and aeration to simultaneously remove ibuprofen, organic materials, and nutrients were examined statistically using Two-way ANOVA and Tukey HSD test. Filtration and adsorption mechanisms of ibuprofen compound by sand medium matrix were proven to occur using solid phase extraction method. The removal efficiency of ibuprofen and COD were dependent on the applied aeration and HRT (p

29 citations

Journal ArticleDOI
01 Apr 2022-Heliyon
TL;DR: In this article , the authors proposed the use of bioaugmentation-assisted phytoremediation in treating heavy metal contaminated soil and discussed the mechanisms of removal and interactions between plants and microbes.

21 citations

Journal ArticleDOI
TL;DR: The greenhouse phytotoxicity experiment was conducted to analyse and assess the capability of Scirpus mucronatus (L.) in tolerating and removing petrol in contaminated soil and confirmed that petrol was absorbed by the plant, as shown by the increased carbon content in the plant's root and stem after the treatment.

16 citations

References
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Journal ArticleDOI
TL;DR: The results indicate that the marshy region is more heavily contaminated with Cd, Hg, Cr, Cu, Ni, Pb, and Zn than other regions on the southeast coast of India.
Abstract: The article presents the results for enrichment of total trace metals (TTMs) from Pallikaranai salt marsh in South Chennai, a metropolis on the southeast coast of India. TTMs Fe, Mn, Cr, Cu, Ni, Co, Pb, Zn, Cd, Sr, V, and Hg along with sediment texture, OC, and CaCO3 were analyzed in 36 surface sediments collected during August 2008 to recognize and observe the input of TTMs in the marsh from various sources in the city limits. In view of the rapid urbanization and industrialization in Chennai City, especially on the southern side, uncontrolled input of sewage, garbage, and industrial effluents into the Pallikaranai marsh land, the elevated concentrations are not surprising. The level of enrichment of TTMs has also increased by 20% to 60% for most of the elements when compared with all other ecosystems in the world as well as the nearby area. The results also indicate that the marshy region is more heavily contaminated with Cd, Hg, Cr, Cu, Ni, Pb, and Zn than other regions on the southeast coast of India. The Enrichment Factor, Contamination Factor, and Igeo indexes are calculated, and these values are useful to assess the degree of pollution in sediments. The spatial distributions of TTMs are also controlled by other factors like geochemical, precipitation, and flocculation of particulate substances in the marsh. The results of the present study suggest the need for a regular monitoring and management program which will help to improve the quality of Pallikaranai pristine marsh land.

32 citations

Journal ArticleDOI
TL;DR: The results of this study suggest that E. asburiae KE17 mitigates the effects of Cu and Zn stress by reprogramming plant metabolic processes.
Abstract: This study aimed to elucidate the role played by Enterobacter asburiae KE17 in the growth and metabolism of soybeans during copper (100 μm Cu) and zinc (100 μm Zn) toxicity. When compared to controls, plants grown under Cu and Zn stress exhibited significantly lower growth rates, but inoculation with E. asburiae KE17 increased growth rates of stressed plants. The concentrations of plant hormones (abscisic acid and salicylic acid) and rates of lipid peroxidation were higher in plants under heavy metal stress, while total chlorophyll, carotenoid content and total polyphenol concentration were lower. While the bacterial treatment reduced the abscisic acid and salicylic acid content and lipid peroxidation rate of Cu-stressed plants, it also increased the concentration of photosynthetic pigments and total polyphenol. Moreover, the heavy metals induced increased accumulation of free amino acids such as aspartic acid, threonine, serine, glycine, alanine, leucine, isoleucine, tyrosine, proline and gamma-aminobutyric acid, while E. asburiae KE17 significantly reduced concentrations of free amino acids in metal-affected plants. Co-treatment with E. asburiae KE17 regulated nutrient uptake by enhancing nitrogen content and inhibiting Cu and Zn accumulation in soybean plants. The results of this study suggest that E. asburiae KE17 mitigates the effects of Cu and Zn stress by reprogramming plant metabolic processes.

31 citations

Journal ArticleDOI
10 Jan 2017-PLOS ONE
TL;DR: The findings from this ecosystem of India will enhance the understanding of the distribution, diversity, ecology, and biological prospects of terrestrial macrofungi as well as their potential to contribute to airborne fungal aerosols.
Abstract: Macrofungi have long been investigated for various scientific purposes including their food and medicinal characteristics. Their role in aerobiology as a fraction of the primary biological aerosol particles (PBAPs), however, has been poorly studied. In this study, we present a source of macrofungi with two different but interdependent objectives: (i) to characterize the macrofungi from a tropical dry evergreen biome in southern India using advanced molecular techniques to enrich the database from this region, and (ii) to assess whether identified species of macrofungi are a potential source of atmospheric PBAPs. From the DNA analysis, we report the diversity of the terrestrial macrofungi from a tropical dry evergreen biome robustly supported by the statistical analyses for diversity conclusions. A total of 113 macrofungal species belonging to 54 genera and 23 families were recorded, with Basidiomycota and Ascomycota constituting 96% and 4% of the species, respectively. The highest species richness was found in the family Agaricaceae (25.3%) followed by Polyporaceae (15.3%) and Marasmiaceae (10.8%). The difference in the distribution of commonly observed macrofungal families over this location was compared with other locations in India (Karnataka, Kerala, Maharashtra, and West Bengal) using two statistical tests. The distributions of the terrestrial macrofungi were distinctly different in each ecosystem. We further attempted to demonstrate the potential role of terrestrial macrofungi as a source of PBAPs in ambient air. In our opinion, the findings from this ecosystem of India will enhance our understanding of the distribution, diversity, ecology, and biological prospects of terrestrial macrofungi as well as their potential to contribute to airborne fungal aerosols.

28 citations

Journal ArticleDOI
TL;DR: The paper showed the need of in-depth monitoring and ample management strategies to ensure nutritional safety conditions of locals from the metals and analyzed the health hazard of metals via phoomdi wild edible consumption, with the results confirming potential risk.
Abstract: In order to determine the potential of phoomdi to accumulate nutrients and metals, 11 dominant species belonging to 10 different families, sediment, and water were analyzed for a period of 2 years from the largest freshwater wetland of north-east India, Loktak (Ramsar site). Results revealed nutrient (TN and TP) and metal (Fe, Mn, Zn, and Cu) compartmentalization in the order phoomdi > sediment > water. Iron concentrations in water (0.37 ± 0.697 to 0.57 ± 1.010 mg L−1) and sediments (81.8 ± 0.45 to 253.1 ± 0.51 mg kg−1) show high metal discharge into the wetland. Metal accumulation in phoomdi ranged up to 212.3 ± 0.46–9461.4 ± 1.09 mg kg−1 for Fe; 85.9 ± 0.31–3565.1 ± 0.87 mg kg−1 for Mn; 9.6 ± 0.41–85.39 ± 0.58 mg kg−1 for Zn; and 0.31 ± 0.04–9.2 ± 0.04 mg kg−1 for Cu, respectively. High bioaccumulation factors (BAF) for metals (S. cucullata, 5.8 × 104 Fe, 3.9 × 104 Mn, and 1.7 × 104 Cu, and O. javanica, 4.9 × 103 Zn) and nutrients (S. polyrhiza, 9.7 × 102 TN, and Z. latifolia, 7.9 × 104 TP) revealed good accumulation in phoomdi compared to the wetland water column and indicate their potential to maintain a safe environment of Loktak. Further, the paper analyzed the health hazard of metals via phoomdi wild edible consumption, with the results confirming potential risk. Thus, the paper showed the need of in-depth monitoring and ample management strategies to ensure nutritional safety conditions of locals from the metals.

23 citations

Book ChapterDOI
01 Jan 2014
TL;DR: Fingerprinting techniques such as terminal restriction fragment length polymorphism (T-RFLP), denaturing gradient gel electrophoresis (DGGE), real-time PCR, microarrays, and metagenomics are being used to characterize the metal-resistant and organic pollutant-degrading endophytes.
Abstract: Hazardous waste sites around the world result from the manufacturing, storage, use, or disposal of compounds such as petroleum hydrocarbons, nitroaromatics, organohalogens, pesticides, and metals. Traditional remediation options are expensive and environmentally invasive. In last two decades, bioremediation has emerged as a more suitable alternative, mainly for the remediation of large polluted sites. Endophytic bacteria and fungi have been the subject of considerable study to explore their potential for improving the remediation of polluted environments. In case of phytoremediation of inorganic pollutants, endophytic bacteria can reduce the phytotoxicity and increase the mobilization and accumulation of heavy metals in aboveground plant biomass. The competency of several endophytes to degrade organic pollutants and their resistance to heavy metals probably originates from their exposure to these compounds, when present in the plant/soil niche. A wide range of molecular techniques have been applied to illustrate the ecology, diversity, composition, and role of endophytes in bioremediation. Fingerprinting techniques such as terminal restriction fragment length polymorphism (T-RFLP), denaturing gradient gel electrophoresis (DGGE), real-time PCR, microarrays, and metagenomics are being used to characterize the metal-resistant and organic pollutant-degrading endophytes.

12 citations