Uptake, Distribution, and Transformation of CuO NPs in a Floating Plant Eichhornia crassipes and Related Stomatal Responses

Karst water is rich in calcium ions (Ca2+) and exhibits poor metal availability and low biodegradation efficiency. This study sought to analyze the effects and mechanisms of Ca2+ on lead (Pb) removal and absorption by Eichhornia crassipes (a floating plant common in karst areas). Moreover, the morphology and functional groups of E. crassipes in water were characterized via SEM, and FTIR. The results demonstrated that the removal rate of Pb in karst water (85.31%) was higher than that in non-karst water (77.04%); however, the Pb bioconcentration amount (BCA) in E. crassipes roots in karst water (1763 mg/kg) was lower than that in non-karst water (2143 mg/kg). With increased Ca2+ concentrations (60, 80, and 100 mg/L) in karst water, the Pb removal rate increased (85.31%, 88.87%, and 92.44%), the Pb BCA decreased (1763, 1317, and 1095 mg/kg), and the Ca BCA increased (6801, 6955, and 9368 mg/kg), which was attributed to PbCO3 and PbSO4 precipitation and competitive Ca and Pb absorption. High Ca2+ concentrations increased the strength of cation exchange, alleviated the fracture degree of fibrous roots, reduced the atrophy of vascular bundles, protected the cell wall, promoted C–O combined with Pb, enhanced the strength of O‒H, SO42−, C=O, and reduced the oxidization of alkynyl acetylene bonds.

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Living with floating vegetation invasions

AMBIO ◽

10.1007/s13280-020-01360-6 ◽

2020 ◽

Vol 50 (1) ◽

pp. 125-137 ◽

Cited By ~ 1

Author(s):

Fritz Kleinschroth ◽

R. Scott Winton ◽

Elisa Calamita ◽

Fabian Niggemann ◽

Martina Botter ◽

...

Keyword(s):

Eichhornia Crassipes ◽

Environmental Benefits ◽

Societal Costs ◽

Nutrient Sources ◽

Urban Land Cover ◽

Plant Coverage ◽

Floating Vegetation ◽

Negative Impacts ◽

Water Hyacinths ◽

Floating Plant

AbstractInvasions of water bodies by floating vegetation, including water hyacinth (Eichhornia crassipes), are a huge global problem for fisheries, hydropower generation, and transportation. We analyzed floating plant coverage on 20 reservoirs across the world’s tropics and subtropics, using > 30 year time-series of LANDSAT remote-sensing imagery. Despite decades of costly weed control, floating invasion severity is increasing. Floating plant coverage correlates with expanding urban land cover in catchments, implicating urban nutrient sources as plausible drivers. Floating vegetation invasions have undeniable societal costs, but also provide benefits. Water hyacinths efficiently absorb nutrients from eutrophic waters, mitigating nutrient pollution problems. When washed up on shores, plants may become compost, increasing soil fertility. The biomass is increasingly used as a renewable biofuel. We propose a more nuanced perspective on these invasions moving away from futile eradication attempts towards an ecosystem management strategy that minimizes negative impacts while integrating potential social and environmental benefits.

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Utilization of macrophyte biofilter in effluent from aquaculture: I. Floating plant

Brazilian Journal of Biology ◽

10.1590/s1519-69842002000400019 ◽

2002 ◽

Vol 62 (4a) ◽

pp. 713-723 ◽

Cited By ~ 10

Author(s):

L. H. SIPAÚBA-TAVARES ◽

E. G. P. FÁVERO ◽

F. M. S. BRAGA

Keyword(s):

Eichhornia Crassipes ◽

Low Cost ◽

Experimental Period ◽

Dominant Group ◽

Ph Values ◽

Floating Macrophyte ◽

High Production ◽

Dry Seasons ◽

Production Period ◽

Floating Plant

The objective of this work was to manufacture a low-cost biofilter, made of floating macrophyte (Eichhornia crassipes). Limnological studies were conducted 7 days after the macrophytes were placed in the biofilter, and continued over a period of 30 consecutive days. During rainy and dry seasons, and high production period, samples were taken three times a week. The lowest levels of nitrogen compounds were observed in the July/August period, which corresponded to lower fish production and low supply rattion in the culture ponds. During the experimental period, pH values ranged from acid to alkaline and did not oscillate with higher average values during April/May. Alkalinity and bicarbonate dominance in the medium were directly affected by pH. With respect to associated micro-fauna, among phyto-plankton Chlorophyta was the dominant group and among zooplankton, Rotifera. It is recommended that during production peaks, the aquatic plants should be replaced by small buds every 10 days.

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Does clonal fragmentation of the floating plant Eichhornia crassipes affect the growth of submerged macrophyte communities?

Folia Geobotanica ◽

10.1007/s12224-015-9226-8 ◽

2015 ◽

Vol 50 (3) ◽

pp. 283-291 ◽

Cited By ~ 7

Author(s):

Hong-Li Li ◽

Ying-Shou Xu ◽

Yong-Yang Wang ◽

Nai-Qun Yu ◽

Ming-Xiang Zhang ◽

...

Keyword(s):

Eichhornia Crassipes ◽

Submerged Macrophyte ◽

Macrophyte Communities ◽

Clonal Fragmentation ◽

Floating Plant

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Study of The Pharmacological Activity and Heavy Metal Content of Eichhornia Crassipes Extract

ICONIET PROCEEDING ◽

10.33555/iconiet.v2i2.17 ◽

2019 ◽

Vol 2 (2) ◽

pp. 91-95 ◽

Cited By ~ 1

Author(s):

Jimmy Jimmy ◽

Diah Indriani Widiputri ◽

Paulus Gunawan

Keyword(s):

Heavy Metal ◽

Pharmacological Activity ◽

Water Hyacinth ◽

Metal Content ◽

Eichhornia Crassipes ◽

High Light Intensity ◽

Milling Process ◽

Heavy Metal Content ◽

Solvent Ratio ◽

Negative Impacts

Eichhornia crassipes is well-known as water hyacinth. Water hyacinth grows rapidly in the nutrient-rich water and high light intensity places. The uncontrollable growth of water hyacinth has caused many negative impacts to the environment. For instance, interrupted water transport and decreased population of aquatic lives. The capacity of utilising water hyacinth is slower than water hyacinth growth and water hyacinth is still considered as a threat to theecosystem. This work was focused on the study of the pharmacological activity and heavy metal content of water hyacinth in Lake Cipondoh, Tangerang. Fresh water hyacinth was pre-treated through oven-drying and milling process. After that, each part of the plant was macerated by using multiple extraction method with 96% ethanol/water and three variations of sample-to-solvent ratios (1:30, 1:50, and 1:75 w/v). The result of the experiment showed thatwater hyacinth leaves produced an extract with lowest IC 50 (55.76 ± 6.73 ppm) compared toother parts. The most optimum solvent used to achieve this result was 96% ethanol/water (1:1 v/v). In order to obtain the lowest antioxidant activity, the sample to solvent ratio used was 1:50 and the heavy metal in the extract was very low. With this result, it was concluded that there is a promising opportunity to apply the water hyacinth growing in Lake Cipondoh, Tangerang as herbal medicine ingredient. Through this utilization, the overall number of water hyacinth in Indonesia can be reduced or at the least be controlled, so that the environmental problem caused by this plant can be minimized.

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ANTIBIOTIC PROFILE AND ANTIBACTERIAL ACTIVITY OF COPPER OXIDE NANOPARTICLES AGAINST Pseudomonas fluorescens ISOLATED FROM WOUND INFECTION

International Journal of Drug Delivery Technology ◽

10.25258/ijddt.v9i3.10 ◽

2019 ◽

Vol 9 (o3) ◽

Author(s):

Haider Qassim Raheem ◽

Takwa S. Al-meamar ◽

Anas M. Almamoori

Keyword(s):

Antibacterial Activity ◽

Copper Oxide ◽

Pseudomonas Fluorescens ◽

Wide Spectrum ◽

Copper Oxide Nanoparticles ◽

Morphological Properties ◽

Clinical Samples ◽

Oxide Nanoparticles ◽

Cuo Nps ◽

Disk Diffusion Assay

Fifty specimens were collected from wound patients who visited Al-Hilla Teaching Hospital. The samples were grown on Blood and MacConkey agar for 24-48 hr at 37oC. The bacterial isolates which achieved as a pure and predominant growth from clinical samples as Pseudomonas fluorescens, were identified using morphological properties and Vitek2 system. The anti-bacterial activity of copper oxide nanoparticles (CuO NPs) against was tested by (disk diffusion assay) using dilutions of (400, 200, 100, 50, 25, and 12.5‎µ‎g/ml). The (MIC and MBC) of each isolate was determined. CuO NPs shows wide spectrum antibacterial activity against tested bacteria with rise zone of inhibition diameter that is proportionate with the increase in nanoparticle concentration. The MIC of CuO NPs extended from 100-200‎µ‎g/ml and the MBC ranged from 200-400‎µ‎g/ml. The antibiotic profile was determined by Viteck 2 compact system (Biomérieux). CuO NPs‎ found highly effective and safe in P. fluorescens wounds infections comparing with used antibiotics.

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