Removal of Heavy Metals from Aquatic Environments Using Water Hyacinth and Water Lettuce

Radu, Violeta-Monica; Ionescu, Petra; Diacu, Elena; Ivanov, Alexandru Anton

doi:10.37358/rc.17.12.5973

Cited by 11 publications

(5 citation statements)

References 10 publications

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“…crassipes could be used as a kind of phytoremediation to remedy ecosystems that have been polluted by trace elements. Some relevant could construct and treat the wetlands or introduce the plant into natural water bodies to control the pollution in contaminated water, which is consistent with the results of a previous study 50,51 .…”

Section: Resultssupporting

confidence: 88%

Concentration Levels, Biological Enrichment Capacities and Potential Health Risk Assessment of Trace Elements in Eichhornia crassipes from Honghu Lake, China

Zhang

Liu

et al. 2019

Sci Rep

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This study investigated the concentrations of Zn, Cu, Cr, Pb, As and Cd in different tissues of E . crassipes from Honghu Lake. The total concentrations of trace elements in E . crassipes were observed in descending order: Zn (111.6162) > Cu (15.7494) > Cr (7.0466) > Pb (5.6251) > As (3.6831) > Cd (0.1941) mg/kg. The order of the bioconcentration factor (BCF) measured in E . crassipes was Zn > As > Cr > Cu > Pb > Cd > 1, indicating that E . crassipes possessed a strong biological enrichment ability to accumulate a variety of trace elements. The translocation factor (TF) values decreased in the order of Cu > Zn > Cr > As > Pb > Cd, all of which were lower than 1, which showed that the absorption of the trace elements by E . crassipes was mainly accomplished in the roots. Moreover, the health risk assessments showed that the carcinogenic and noncarcinogenic risks of the edible parts of E . crassipes were 26.1 and 4.6 times higher than the maximum acceptable value recommended by the USEPA for adults and children of approximately 39.2- and 6.9-fold, respectively. Children were more sensitive than adults. The main trace elements that led to noncarcinogenic risks were As, Cr and Cu, while Cr and As led to carcinogenic risks. The results of the Pearson correlation showed positive correlations with the concentrations of Zn, Cr and As between E . crassipes and the water as well as negative correlations of the contents of all six trace elements between E . crassipes and the sediment.

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Section: Resultssupporting

confidence: 88%

Concentration Levels, Biological Enrichment Capacities and Potential Health Risk Assessment of Trace Elements in Eichhornia crassipes from Honghu Lake, China

Zhang

Liu

et al. 2019

Sci Rep

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“…Nowadays environmental pollution is increasing due to the so-called “industrial development” and the proliferation of small and large industries that produce a large amount of pollutants. Within this type of industry can be mentioned mining, smelting, electroplating and battery manufacturing, all of which generate high pollution in lagoons, rivers, lakes and finally the oceans, due to the amount of deposits of heavy metal ions [ 1 , 2 , 3 ]. This generates serious health problems worldwide, due to the ingestion of these pollutants.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Characterization of Graphene Oxide for Pb(II) and Zn(II) Ions Adsorption from Aqueous Solution: Experimental, Thermodynamic and Kinetic Study

2020

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A thermodynamic and kinetic study of the adsorption process of Zn (II) and Pb (II) ions from aqueous solution on the surface of graphene oxide (GO) to establish the mechanisms of adsorbate–adsorbent interaction on this surface. The effect of pH on the retention capacity was studied and adsorption isotherms were determined from aqueous solution of the ions; once the experimental data was obtained, the kinetic and thermodynamic study of the sorption process was carried out. The data were fitted to the Langmuir, Freundlich, Dubinin-Raduskevich and Temkin isotherm models. The results showed that Zn(II) and Pb(II) on the GO adsorbing surface fitted the Langmuir model with correlation coefficients (R2) of 0.996. Kinetic models studied showed that a pseudo-second-order model was followed and thermodynamically, the process was spontaneous according to the values of Gibbs free energy (ΔGo). N2 adsorption isotherms were determined and modeled with the NLDFT (nonlocal density functional theory) and QSDFT (quenched solid density functional theory) kernels.

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“…These microbes eat organic materials and nutrients in wastewater and convert them into inorganic compounds that plants may absorb. Water hyacinth often develops swiftly in non-native countries due to a lack of natural enemies or consumers [87,89].…”

Section: Water Hyacinthmentioning

confidence: 99%

Treatment of Industrial Wastewater in a Floating Treatment Wetland: A Case Study of Sialkot Tannery

Younas¹,

Kumar

Deitch

et al. 2022

Sustainability

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The city of Sialkot in Pakistan is a hub of leather tanneries, with approximately 260 tanneries in operation and, while producing millions of leather products per day, the city discharges millions of gallons of untreated effluent into drains each day. In order to devise a cost-effective system for the treatment of tannery wastewater, a floating treatment wetland (FTW) was established to treat the effluent using local plant species through phytoremediation. The efficiency of the FTW was tested with three different plant species, each grown separately and operating for three months in the FTW tank. Two of the plant species introduced, water hyacinth and water lettuce, were floating and vascular; the third plant species Typha latifolia was vegetated on a floating mat of styrofoam while the roots extended down to the contaminated water. Wastewater from a tannery drain was pumped into the FTW tank with a flow of 0.5 L per minute and was given a retention time of six days. The influent and effluent from the FTW were periodically tested to determine the percentage removal of contaminants, primarily the total suspended solids, biochemical oxygen demand, chemical oxygen demand, and chromium. After two months with each species, a significant change in the quality of wastewater was measured: chromium was removed by up to 95 percent by the water hyacinth and water lettuce and 33 percent by the Typha latifolia. The pilot model indicates that FTWs are an effective system to treat effluent from tanneries in a cost-effective way as an alternative to establishing an expensive treatment system with high associated operational costs. It can help in achieving the circular economy concept of conventional wastewater schemes towards more sustainable ones. Moreover, to achieve the principles of circular economy and environmentally friendly development, it is crucial that the substances used for a wetland foundation have the capacity to be recycled, are available at a cheap price, and are locally available.

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Removal of Heavy Metals from Aquatic Environments Using Water Hyacinth and Water Lettuce

Cited by 11 publications

References 10 publications

Concentration Levels, Biological Enrichment Capacities and Potential Health Risk Assessment of Trace Elements in Eichhornia crassipes from Honghu Lake, China

Concentration Levels, Biological Enrichment Capacities and Potential Health Risk Assessment of Trace Elements in Eichhornia crassipes from Honghu Lake, China

Preparation and Characterization of Graphene Oxide for Pb(II) and Zn(II) Ions Adsorption from Aqueous Solution: Experimental, Thermodynamic and Kinetic Study

Treatment of Industrial Wastewater in a Floating Treatment Wetland: A Case Study of Sialkot Tannery

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