Nitrate removal from synthetic medium and groundwater with aquatic macrophytes

Ayyasamy, P. M.; Rajakumar, S.; Sathishkumar, M.; Swaminathan, K.; Shanthi, Krishnamurthy; Lakshmanaperumalsamy, P.; Lee, S.

doi:10.1016/j.desal.2008.05.008

Cited by 72 publications

(27 citation statements)

References 34 publications

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“…However, approximately 57.6 % of NO 3 − was leached back into the leachate. This is probably due to the fatality effect of Eichhornia crassipes sp [35,36]. This results imply that Eichhornia crassipes sp.…”

Section: Characterization Of Leachate In Ayer Hitam and Jeram Landfillsmentioning

confidence: 93%

Removal of Nitrate by Eichhornia crassipes sp. in Landfill Leachate

2015

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− . This study shows that concentration of NO 3 − was higher in young landfill (27 mg/L) than that in old landfill (9 mg/L) at neutral pH. Finding of these results indicate that Eichhornia crassipes sp. has the ability to remove NO 3 − at different concentrations in three days. Approximately 69 and 64 % of NO 3 − that present in leachate from young landfill was removed in sample without dilution and 50 % dilution, respectively. While approximately 28 and 33.6 % of NO 3 − present in leachate collected from old landfill was removed in similar dilution samples. This study is very significant to identify the capability of Eichhornia crassipes sp. to remove NO 3 − in landfill leachate.

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Section: Characterization Of Leachate In Ayer Hitam and Jeram Landfillsmentioning

confidence: 93%

Removal of Nitrate by Eichhornia crassipes sp. in Landfill Leachate

2015

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“…This fact suggests that S. molesta biomass reduction begins in the root system caused by ion copper absorption. For example, in P. stratiotes mercury accumulation was about 4 times higher in roots than in the upper parts (Snow and Ghaly, 2008;Ayyasamy et al, 2009). So, although floating aquatic macrophyte with high biomass are more resistant to adverse environmental conditions, copper contamination of aquatic environments can reduce the biomass of species such as Eichhornia crassipes and Pistia stratiotes due to higher ion absorption caused by greater root area.…”

Section: Resultsmentioning

confidence: 99%

Biomass reduction of Salvinia molesta exposed to copper sulfate pentahydrate (CuSO4.5H2O)

Barros¹,

Henares²

2015

Rev. ambiente água

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Copper in the aquatic ecosystem may remain adsorbed or be incorporated into the biomass and undergo biomagnification causing unwanted effects to aquatic macrophyte communities. This study evaluated the biomass reduction of Salvinia molesta (Mitchell) exposed to copper sulphate pentahydrate (CuSO 4 .5H 2 O) under laboratory conditions. Approximately 20.5 g of fresh mass (FM) of S. molesta (0.74 g dry matter, DM) were placed in glass tanks with different concentrations (n = 3) of CuSO 4 .5H 2 O as follows: 0.0; 2.0; 4.0; 6.0; and 8.0 mg L -1 for 28 days. The dry mass was determined after each seven-day interval over 28 days and submitted to repeated ANOVA measures, followed by a Tukey test (P<0,05). The results show that macrophyte increased until the seventh day of exposure in all treatments. After this period, the biomass of S. molesta decreased; but there was no significant difference between treatments with copper, except for the 8.0 mg L -1 treatment. The copper treatments decreased the S. molesta biomass an average of 43.2% (0.50 g DM) after 28 days. At the end of the experiment, copper absorption in the treatments with 6.0 and 8.0 mg L -1 was on average 77.9% higher than in the treatments with 2 and 4 mg L -1 .

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“…Thus, available methods for the efficient treatment of waters polluted with ammonium ions are gaining increased interest [9][10][11]. The biological methods were frequently used for the wastewater treatment, but due to the presence of microorganisms, for the surface and drinking waters, as well as for the ground waters, ion exchange treatment was favourable [12][13][14]. Among many ion exchange materials, over the last 10 years zeolitic materials have become more attractive, constantly increasing in importance as the ion exchanger in water pollution control [15][16][17].…”

Section: Introductionmentioning

confidence: 99%