Effect of design and operational parameters on nutrients and heavy metal removal in pilot floating treatment wetlands with Eichhornia Crassipes treating polluted lake water

Gaballah, Mohamed S.; Ismail, Khiary; Aboagye, Dominic; Ismail, Mona M.; Sobhi, Mostafa; Stefanakis, Alexandros I.

doi:10.1007/s11356-021-12442-7

Cited by 39 publications

(11 citation statements)

References 73 publications

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“…The high concentrations of TP observed in the fishponds with AFIs (103.1 µg L -1 ) may have led to phosphorus saturation in the plant tissue. According to Henares and Camargo (2014), this is due to the species saturation point that is 0.26 mg L -1 of N and 77 µg L -1 of P. A similar result was recorded by Gaballah et al (2021), who evaluated the efficiency in the removal of nutrients with AFIs colonized by E. crassipes in a pilot study, and verified a decline in the removal of P after 5 days of experiment and related these values to phosphorus saturation. The N:P ratio should also be considered when studying the removal of nutrients by E. crassipes, since this species accumulates N more quickly in its tissue than P, and phosphorus assimilation is affected by the N:P ratio (Jayaweera and Kasturiarachchi, 2004).…”

Section: Discussionsupporting

confidence: 75%

Artificial floating islands as a tool for the water quality improvement of fishponds

Osti¹,

Rodrigues²,

Carmo³

et al. 2021

Rev. ambiente água

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In this study, the ecotechnology artificial floating islands (AFIs), colonized by Eichhornia crassipes, have been tested as a tool for water quality improvement of fishponds. The experiment was carried out in semi-intensive production during the grow-out period of Nile tilapia, comprising one production cycle. It was completely randomized with two treatments (with and without AFIs) and three replications. Temperature, dissolved oxygen, conductivity, pH, turbidity, total dissolved solids (TDS), transparency (Secchi) and concentrations of chlorophyll a (CL a), total nitrogen (TN), total ammonia nitrogen (TAN), total phosphorus (TP) and orthophosphate (PO43--P) were analyzed fortnightly in the fishponds. Two groups ordered based on environmental characteristics were formed by applying the Principal Component Analysis (70.68% of explicability). The fishponds with AFIs were assigned to higher values of Secchi and lower values of pH, turbidity, TDS and concentrations of nutrients. On the other hand, the fishponds without AFIs were assigned to the highest values of these variables, except for Secchi. In 30 days, the AFIs showed the lowest concentrations of TP and PO43--P, and for CL a, TN and TAN, the differences were recorded after 90 days. The use of AFIs has demonstrated potential to conserve water quality in fishponds, notably for biologically assimilable elements (PO43--P and TAN) and for those directly related to eutrophication (P and N). Artificial floating islands should be encouraged for small and medium-sized farmers as tool to improve water quality in fishponds. However, new AFIs coverage rates must be evaluated, as well as the control of hydraulic retention rates. Keywords: aquaculture, ecotechnology, free-floating aquatic macrophytes.

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Section: Discussionsupporting

confidence: 75%

Artificial floating islands as a tool for the water quality improvement of fishponds

Osti¹,

Rodrigues²,

Carmo³

et al. 2021

Rev. ambiente água

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“…Sensitivity analysis highlights the most important model parameters that determine whether data quality needs to be improved, and, thus, enhances the interpretation of results. In this perspective, and following the approach of similar research studies [8], a sensitivity analysis was conducted regarding the key variables of the system which represent the main assumptions of the study. According to Garfí et al [21], a variation of 10% was considered for the parameters, and the sensitivity coefficient was calculated using Equation (4).…”

Section: Sensitivity Of Lca Resultsmentioning

confidence: 99%

“…FWs have successfully been applied for pollution control mostly in rivers, lakes, and ponds with fluctuating water levels, and are a suitable green solution for urban water management [8]. Currently, they are being used to treat hypertrophication, sewage and domestic wastewater, combined sewer overflow, contaminated groundwater, stormwater, acid mine drainage, poultry effluent, piggery effluent, boron-enriched water, polluted river water, and nutrients-enriched water [7].…”

Section: Introductionmentioning

confidence: 99%

Screening Life Cycle Environmental Impacts and Assessing Economic Performance of Floating Wetlands for Marine Water Pollution Control

Takavakoglou

Georgiadis

Pana

et al. 2021

JMSE

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The growing environmental awareness of society, the advancement of nature-based solutions (NbSs), and the need for reliable and cost-effective solutions create a favorable environment of opportunities for floating wetlands as alternative solutions for marine water pollution control. The aim of this work was to screen, through OpenLCA, the environmental impacts of floating wetlands for marine water pollution control at various life cycle stages of the system, and assess its economic performance and contribution to the welfare of society. The stage of raw materials production and acquisition was found to be responsible for the main environmental impacts of the floating wetlands, especially on global warming potential, whereas the main impact of the operational stage was related to the eutrophication potential due to N and P residuals in the effluent. The economic performance indicators of economic net present value (ENPV), economic rate of return (ERR), and benefits/costs ratio (B/C ratio) indicate, although marginally, that floating wetlands may constitute a viable investment with potential positive socioeconomic impacts. However, there are still several scientific challenges and technical issues to be considered for the operational application of such systems at full-scale in marine environments.

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“…The tests to determine the removal efficiencies of heavy metals through this type of biomass are generally carried out in batches, a condition under which the removal efficiencies, adsorption capacities and adsorption kinetics obtained 16 . It is generally carried out on a laboratory scale where their experiments carried out in small volumes (milliliters), from the work at the laboratory level the necessary data can obtained so that, through an adequate scaling technique, a process can defined at the pilot level and this, in turn, serves to define an industrial plant 17 .…”

Section: Introductionmentioning

confidence: 99%

“…The used the xanthogenate of cellulose was implemented for eliminated Cr (VI) 15 .The tests to determine the removal efficiencies of heavy metals through this type of biomass are generally carried out in batches, a condition under which the removal efficiencies, adsorption capacities and adsorption kinetics obtained 16 . It is generally carried out on a laboratory scale where their experiments carried out in small volumes (milliliters), from the work at the laboratory level the necessary data can obtained so that, through an adequate scaling technique, a process can defined at the pilot level and this, in turn, serves to define an industrial plant 17 .Subsequently, column adsorption tests used to establish the efficiency of the biomass in the removal of the contaminant, in an arrangement like that used in the industry 18 . Obtaining rupture curves in specific operating conditions whose behavior depends on the adsorption kinetics, adsorption capacity and hydraulic factors 19 and in general these tests carried out on a pilot scale, a pilot plant is a process to small scale.…”

mentioning

confidence: 99%

Development of a treatment for water contaminated with Cr (VI) using cellulose xanthogenate from E. crassipes on a pilot scale

Sayago

Ballesteros

2023

Sci Rep

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Water care is an imperative duty in industries with effluents loaded with pollutants such as heavy metals, especially chromium (VI), extremely dangerous for humans and the environment. One way of treating water is possible through a continuous system with dry and crushed vegetable biomass of cellulose xanthogenate because it can adsorb heavy metals, especially due to its low production costs. Through continuous systems and with the waste of PET plastics, it is possible to develop a water treatment process adapting this system and biomass. The objective of this research is the development of a treatment for water contaminated with Cr (VI) using cellulose xanthogenate from E. crassipes on a pilot scale. Where a mass balance conducted to determine the adsorption capacity of this heavy metal, corroborating it through the Thomas model. The treatment process eliminated around 95% of Cr (VI) present in the water, in addition, biomass reuse cycles carried out, which maintained a considerable adsorption capacity in all the cycles conducted through EDTA reagent.

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Effect of design and operational parameters on nutrients and heavy metal removal in pilot floating treatment wetlands with Eichhornia Crassipes treating polluted lake water

Cited by 39 publications

References 73 publications

Artificial floating islands as a tool for the water quality improvement of fishponds

Artificial floating islands as a tool for the water quality improvement of fishponds

Screening Life Cycle Environmental Impacts and Assessing Economic Performance of Floating Wetlands for Marine Water Pollution Control

Development of a treatment for water contaminated with Cr (VI) using cellulose xanthogenate from E. crassipes on a pilot scale

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