Ecosystem activation system (EAS) technology for remediation of eutrophic freshwater

Chai, Xin‐Sheng; Wu, Boran; Xu, Zhongshuo; Yang, Ning; Song, Liyan; Mai, Jingjing; Chen, Yang; Dai, Xiaohu

doi:10.1038/s41598-017-04306-3

Cited by 17 publications

(5 citation statements)

References 43 publications

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“…Diverse methods are being developed for water remediation, including use of plant biomass 18 – 20 . Work by Rezania (2015) and others have reported the potential of water hyacinth in the removal of pollutants from an aqueous solution 21 – 23 .…”

Section: Resultsmentioning

confidence: 99%

Extending the geographic reach of the water hyacinth plant in removal of heavy metals from a temperate Northern Hemisphere river

Jones

Jenkins

Haris

2018

Sci Rep

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Water hyacinth (Eichhornia crassipes) has been used for environmentally sustainable phytoremediation of water, though its use has been geographically restricted. For the first time we extend its geographical reach by investigating its potential for clean-up of water from a highly polluted British river (Nant-Y-Fendrod, a tributary of the River Tawe). Investigations using the plant were conducted at three levels: a bench-scale study using polluted river water and synthetic solutions; an in-situ trial using water hyacinth within the Nant-Y-Fendrod; and a bankside trial to pump and treat river water. The removal of the largest number of heavy metals (21) from water in a single study using ICP-MS is reported, including Sb, for the first time. Results are promising, with bench-scale tests demonstrating up to 63% removal of Al, 62% Zn, 47% Cd, 22% Mn and 23% As, during just seven hours exposure to the plant. When extended to three weeks exposure, removal is evident in the order Al > Cd > Zn > Mn > Ni > As > V. Furthermore, in-situ mean removal of 6%, 11% and 15% of Mn, Zn and Cd respectively is demonstrated. As the world learns to adapt to climate change, studies of the type reported here are needed to exploit the remarkable phytoremediation potential of water hyacinth.

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Section: Resultsmentioning

confidence: 99%

Extending the geographic reach of the water hyacinth plant in removal of heavy metals from a temperate Northern Hemisphere river

Jones

Jenkins

Haris

2018

Sci Rep

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“…Chloroflexi (Wang et al, 2017) and Flavobacteria (Vu et al, 2019) are important for nutrient removal and organic carbon decomposition, respectively. HgcI_clade (Garcia et al, 2012), Limnohabitans (Chai et al, 2017), and Comamonadaceae (Ge et al, 2015) are responsible for phosphorous pathways that include accumulation and removal. Therefore, thermal stratification (Zhou et al, 2020) and nutrients might play important roles in shaping the bacterial community structure of reservoirs with different nutritional status.…”

Section: Thermal Stratification and Nutrients Might Play Key Roles In Shaping The Vertical Dynamic Distribution Of The Bacterial Communitmentioning

confidence: 99%

Vertical Distribution of Bacterial Community in Water Columns of Reservoirs With Different Trophic Conditions During Thermal Stratification

Yue

Cai

Tang

et al. 2021

Front. Environ. Sci.

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Water eutrophication is a global ecological issue, and thermal stratification of water bodies can enable eutrophication. We examined bacterial communities in the stratified water columns and sediments in two different trophic reservoirs along the Wujiang River using quantitative real-time PCR and high-throughput sequencing. Bacterial 16S rRNA gene copies varied from 3.70 × 107 to 5.27 × 108 copies/L in the water column of Hongjiadu (HJD) Reservoir (60 m water depth) with slightly stratified variation; while in Wujiangdu (WJD) Reservoir (70 m water depth), bacterial abundance decreased markedly from the surface to the bottom(1.74 × 109 to 2.38 × 107 copies/L). The vertical distribution patterns of bacteria in both reservoirs resembled those of water Chlorophyll a (Chla) concentrations. The abundance was negatively correlated with water depth (D), total nitrogen (TN), nitrate (NO3–-N), and positively correlated with water temperature (T) and dissolved oxygen (DO) level. In contrast, the alpha diversity of bacteria showed the opposite trend in the vertical water column. Proteobacteria, Actinobacteria, and Bacteroidetes were the predominant phyla in the water column of both reservoirs. Compared to WJD Reservoir, HJD Reservoir displayed marked vertical spatial difference in bacterial community structure during thermal stratification. In particular, Pseudomonas was frequently detected at the bottom of the HJD Reservoir. These results were consistent with predictive metagenomic profiling that revealed different vertical functional variation patterns of the bacterial communities in the two reservoirs. The bacterial community structure of HJD Reservoir was associated with water D, ammonium (NH4+-N), nitrite (NO2–-N), and total phosphorus (TP). The community structure of WJD Reservoir was related to water T, Chla, NO3–-N, and TN. The findings highlighted the important roles played by thermal stratification and nutrients in shaping the water bacterial community structure. Additionally, the absolute abundance of water nitrifiers (AOB gene copies) and denitrifiers (narG, nirS, norB, and nosZ gene copies) displayed significant vertical differences in the water columns of both reservoirs. Gene copies involved in denitrification were significantly higher than those involved in nitrification. Water phosphorus and nitrogen contents were important variables influencing the absolute abundance of ammonia oxidizers and denitrifying bacteria, respectively. Our study revealed that the emergence of thermal stratification was responsible for the vertical stratification of bacteria in water and affected the bacterial community structure together with nutrients.

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“…Members of the genus Hyphomicrobium are known as plant-associated methylotrophs (Macey et al 2020), but in contrast to this study, in a previous study their occurrence correlated negatively with plant growth (Franke-Whittle et al 2015). However, several Hyphomicrobium species are denitri ers (Martineau et al 2015) and another presently plant production-associated genus Arcicella has been connected to nitrogen and phosophorus cycling (Chai et al 2017). These bacteria are good candidates as indicators of e cient nutrient transfer from RAS e uents to plants.…”

Section: Bacterial Community Composition But Not Diversity Drove Plan...mentioning

confidence: 99%

Spearmint enhances lettuce biomass and provides microbes to co-cultured lettuce in a decoupled aquaponic system

Atique,

Juottonen,

Kytöviita

2024

Preprint

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Aquaponics, where recirculating aquaculture systems (RAS) and hydroponics are combined to grow fish and plants, is a promising farming technique for sustainable food production. We investigated whether lettuce yield in aquaponics can be enhanced by companion plants and the role of companion plant-derived microbes. Lettuce and companion plants (spearmint, rucola, wormwood) were grown for 30 days in hydroponic units in RAS effluents in three time replicates. The growth of lettuce increased when grown with spearmint and rucola. Companion plants also influenced the bacterial community composition in lettuce. In particular, lettuce grown with spearmint or wormwood contained bacteria that potentially originated from the companion plant. A specific subset of bacterial taxa from spearmint were also associated with increased lettuce growth. On the other hand, the microbial community in mature lettuce did not develop markedly from the RAS effluents. However, the factor with the largest effect on plant growth and bacterial community composition was time replicate. In conclusion, the companion plants particularly spearmint enhanced the growth of lettuce through facilitation and potentially by providing lettuce with bacteria associated with increased growth. Our results emphasize the importance of the bacterial components and temporal fluctuations in optimizing aquaponics productivity.

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Ecosystem activation system (EAS) technology for remediation of eutrophic freshwater

Cited by 17 publications

References 43 publications

Extending the geographic reach of the water hyacinth plant in removal of heavy metals from a temperate Northern Hemisphere river

Extending the geographic reach of the water hyacinth plant in removal of heavy metals from a temperate Northern Hemisphere river

Vertical Distribution of Bacterial Community in Water Columns of Reservoirs With Different Trophic Conditions During Thermal Stratification

Spearmint enhances lettuce biomass and provides microbes to co-cultured lettuce in a decoupled aquaponic system

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