scholarly journals Phytoremediation to improve eutrophic ecosystem by the floating aquatic macrophyte, water lettuce (Pistia stratiotes L.) at lab scale

2021 ◽  
Author(s):  
Kamrun Nahar ◽  
Sirajul Hoque
Keyword(s):  
Aquatic Macrophyte ◽  
Pistia Stratiotes ◽  
Water Lettuce

Phytoremediation of Chromium and Lead Using Water Lettuce Pistia stratiotes L.)

2013 ◽  
Vol 401-403 ◽  
pp. 2071-2075 ◽  
Author(s):  
Yuan Qing Zhou ◽  
Shu Ying Li ◽  
Yun Dong Shi ◽  
Wei Lv ◽  
Tai Bo Shen ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Metal Pollution ◽  
Aquatic Macrophytes ◽  
Bioconcentration Factor ◽  
Aquatic Macrophyte ◽  
Pistia Stratiotes ◽  
Chromium Removal ◽  
Water Lettuce ◽  
Metal Solution

Heavy metal pollution of water is of concern for human health and ecosystem. Under present investigation Pistia stratiotes L. (water lettuce) has been tested for removal of two important heavy metals chromium (Cr) and lead (Pb) from metal solution. This species was grown at four concentrations of Cr and Pb, i.e. 5.0, 10.0, 15.0 and 20.0 mg/L, respectively in single metal solution. This aquatic macrophyte has successfully removed up to 80% of Cr and 93% of Pb after 10 days. The bioconcentration factor (BCF) value ranged between 299 and 1026 for Cr and between 1672 and 1852 for Pb, respectively. The amount of BCF in Pistia stratiotes showed that removal of Pb was higher than removal of Cr. The accumulation of heavy metals was more obvious in the roots as compared to leaves. These findings contribute to the application of aquatic macrophytes to lead and chromium removal from moderately contaminated waters.

Studies on the population biology of water lettuce: Pistia stratiotes L.

Hydrobiologia ◽  
1984 ◽  
Vol 119 (1) ◽  
pp. 15-19 ◽  
Author(s):  
P. N. Rao ◽  
A. Sambi Reddy
Keyword(s):  
Population Biology ◽  
Pistia Stratiotes ◽  
Water Lettuce

scholarly journals Population dynamics and net primary production of the aquatic macrophite Nymphaea rudgeana C. F. Mey in a lotic environment of the Itanhaém River basin (SP, Brazil)

2000 ◽  
Vol 60 (1) ◽  
pp. 83-92 ◽  
Author(s):  
A. F. M. CAMARGO ◽  
E. R. FLORENTINO
Keyword(s):  
Population Dynamics ◽  
Primary Production ◽  
Aquatic Macrophytes ◽  
Aquatic Macrophyte ◽  
Net Primary Production ◽  
Growth Period ◽  
Pistia Stratiotes ◽  
Annual Productivity ◽  
Lotic Environment ◽  
Low Levels

In this paper we evaluated the population dynamics and obtained estimates of the net primary production of the aquatic macrophyte Nymphaea rudgeana in an arm of the Itanhaém River (São Paulo State, Brazil). This species presents, in the studied area, a broad seasonal variation of biomass. As from November (13.1 g DW/m²) we observed a gradual increase of biomass that reached a maximum in February (163.1 g DW/m²). Then, the biomass decreased, maintaining low levels until a new growth period. The reduction of biomass is associated to the development of floating aquatic macrophytes (Pistia stratiotes and Salvinia molesta) and, subsequently to environmental factors (higher salinity values) that are unfavorable to their development. The net primary production of N. rudgeana was estimated from the biomass data, and the annual productivity value was estimated between 3.02 and 3.82 t/ha/year.

scholarly journals Suitability of Macrophytes for Wastewater Treatment and Biogas Generation

2019 ◽  
Vol 9 (2S2) ◽  
pp. 16-18
Keyword(s):  
Wastewater Treatment ◽  
Water Hyacinth ◽  
Aquatic Macrophytes ◽  
Aquatic Macrophyte ◽  
Biogas Production ◽  
Oxygen Demand ◽  
Cow Dung ◽  
Water Lettuce ◽  
Before And After ◽  
Almost All

In this paper three sustainable approaches are made in waste management option. Firstly primary treated domestic sewage is treated by aquatic macrophytes using duckweed, water hyacinth and water lettuce. Biochemical Oxygen Demand (BOD), Chemical Oxygen Demand (COD), Total Suspended Solids (TSS), Total Dissolved Solids (TDS), Phosphate, Nitrates are tested before and after. Result indicates in terms of water quality, almost all three plants shows same removal efficiencies. BOD and TSS removal efficiency is attained more than 95%. COD and TDS removal is reached upto 50% for almost all plants. Secondly the used aquatic macrophytes for wastewater treatment is again used for generation of biogas (water lettuce unit, duckweed unit, water lettuce unit). In addition to three aquatic macrophytes, sludge is collected from aquatic macrophyte unit for generation of biogas. Comparison is made with conventional cow dung biogas unit. Result indicates water lettuce and duckweed produce biogas at earlier stage itself and water hyacinth takes some time for starting of biogas production. This may be due to the structure and texture causes some time for decomposition. Sludge gives maximum biogas generation among all experimental setup. Also in this study cow dung did not give biogas more may be due to poor blend ratio of cow dung with water is one of the reason.

scholarly journals First Attempt at and Early Results on the Biological Control of Pistia stratiotes L. in South Africa

Koedoe ◽  
1987 ◽  
Vol 30 (1) ◽  
Author(s):  
Catharina J. Cilliers
Keyword(s):  
South Africa ◽  
Biological Control ◽  
Pistia Stratiotes ◽  
Water Lettuce ◽  
Early Results ◽  
The Republic

Although Pistia stratiotes L. (water lettuce) is not an important weed in the Republic of South Africa, the host-specific weevil Neohydronomus pulchellus Hustache was imported for the biological control of this weed. The weevil was released onto a dense infestation of P. stratiotes of several years standing on a pan in the Pafuri area in December 1985. By September 1986 the weevils had already destroyed most of the weed and in October 1986 the weed was under biological control at this site.

Nutrient removal by water lettuce (Pisitia stratiotes)

1996 ◽  
Vol 34 (7-8) ◽  
pp. 407-412 ◽  
Author(s):  
T. Aoi ◽  
T. Hayashi
Keyword(s):  
Growth Rate ◽  
Batch Culture ◽  
Culture System ◽  
Eichhornia Crassipes ◽  
Aquatic Macrophyte ◽  
Water Bodies ◽  
Water Lettuce ◽  
Wet Weight ◽  
Water Hyacinths ◽  
Nitrogen Phosphorus

The nutrient uptake and growth rates of the water lettuce [Pisitia stratiotes] were investigated in a batch culture system and a continuous flow system. As the water hyacinth [Eichhornia crassipes] is well known and widely researched as an aquatic macrophyte, water hyacinths were used as a control in a batch culture system. It was found that the specific growth rate of water lettuce was slightly higher in dry season, and in rainy season the growth rate of water hyacinths decreased almost 70%, but the rate of water lettuce decreased only 45%. From this result, water lettuce is thought to be grow up enough even under low solar radiation. The nitrogen, phosphorus and ash contents of biomass were about 1.5 times higher in water hyacinths than in water lettuce (N:2.15% & 1.65%, P:1.67% & 1.03%, ash 19.6% & 19.9% respectively). As the biomass of water lettuce is not so big and heavy (wet weight of water lettuce was under 100g and the width and height of the plant was under 20cm), removal of surplus biomass from water bodies is easy. It was made clear that water lettuce is very effective for removing nutrient from water bodies.

Biosorption of Toxic Metals by Water Lettuce (Pistia stratiotes) Biomass

2017 ◽  
Vol 228 (4) ◽  
Author(s):  
Ana Carolina Dornelas Rodrigues ◽  
Nelson Moura Brasil do Amaral Sobrinho ◽  
Fabiana Soares dos Santos ◽  
André Marques dos Santos ◽  
Ana Carolina Callegario Pereira ◽  
...  
Keyword(s):  
Toxic Metals ◽  
Pistia Stratiotes ◽  
Water Lettuce
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