Isotherm and kinetic modelling of Toluidine Blue (TB) removal from aqueous solution using <i>Lemna minor</i>

Neag, Emilia; Malschi, D.; Măicăneanu, Andrada

doi:10.1080/15226514.2018.1460304

“…Also, a removal rate of 94, 72, 63, 82, 82 and 82 % respectively for biochemical oxygen demand, ammonia, total suspended solids, total nitrogen, ammonium nitrate, and phosphate by duckweed in effluent was reported [57]. Blue dye and textile dyes were removed at a rate of 59.6% and 10-96 % respectively by L. minor, indicating the plant can be very useful in textile industries to remediate effluents [203,204], supported in further study by Neag et al [205] using Toluidine Blue dye. The usefulness of duckweed for phytoremediation of wide range of organic pollutants has been extensively reviewed recently (see ref [57]).…”

Section: Phytoremediation Of Organic Pollutant In Watersupporting

confidence: 55%

“…In the use of Freundlich and Langmuir isotherms models, assumption is made that there is a local equilibrium between the contaminated aqueous medium and contaminant, an assumption that may be misleading. However, they have been widely used in absorption studies [215][216][217] and recently used in phytoremediation studies [188,205,218,219].…”

Section: Chemometrics For Aquatic Phytoremediationmentioning

confidence: 99%

Phytoremediation of Polluted Waterbodies with Aquatic plants: Recent Progress on Heavy Metal and Organic Pollutants

Christian¹,

Beniah²

2019

Preprint

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Heavy metals and organic pollutants are ubiquitous environmental pollutants affecting the quality of soil, water and air. Over the past 5 decades, many strategies have been developed for the remediation of polluted water. Strategies involving aquatic plant use are preferable to conventional methods. In this study, an attempt was made to provide a brief review on recent progresses in research and practical applications of phytoremediation for water resources with the following objectives: (1) to discuss the toxicity of toxic chemicals pollution in water to plant, animals and human health (2) to summarise the physicochemical factors affecting removal of toxic chemicals such as heavy metals and organic contaminants in aqueous solutions by aquatic plants; (3) to summarise and compare the removal rates of heavy metals and organic contaminants in aqueous solutions by diverse aquatic plants; and (4) to summarise chemometric models for testing aquatic plant performance. More than 20 aquatic plants specie have been used extensively while duckweed (L. minor), water hyacinth (Eichhornia crassipes), water lettuce (P. stratiotes) are the most common. Overall, chemometrics for performance assessment reported include: Growth rate (GR), Growth rate inhibition (% Inhibition), Metal uptake (MU), translocation/transfer factor (TF), bioconcentration factor (BCF), Percent metal uptake (% MU), Removal capacity (RC) and Tolerance index (TI) while absorption rate have been studied using the sorption kinetics and isotherms models such as pseudo-first-order (PFO), pseudo-second-order (PSO), Freundlich, Langmuir and Temkin. Using modeling and interpretation of adsorption isotherms for performance assessment is particularly good and increases level of accuracy obtained from adsorption processes of contaminant on plant. Conclusion was drawn by highlighting the gap in knowledge and suggesting key future areas of research for scientists and policymakers.

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“…Also, a removal rate of 94, 72, 63, 82, 82 and 82 % respectively for biochemical oxygen demand, ammonia, total suspended solids, total nitrogen, ammonium nitrate, and phosphate by duckweed in effluent was reported [57]. Blue dye and textile dyes were removed at a rate of 59.6 % and 10-96 % respectively by L. minor, indicating the plant can be very useful in textile industries to remediate effluents [203,204], supported in further study by Neag et al [205] using Toluidine Blue dye. The usefulness of duckweed for phytoremediation of wide range of organic pollutants has been extensively reviewed recently (see ref [57]).…”

Section: Phytoremediation Of Heavy Metal Polluted Watermentioning

confidence: 60%

“…In the use of Freundlich and Langmuir isotherms models, assumption is made that there is a local equilibrium between the contaminated aqueous medium and contaminant, an assumption that may be misleading [221]. However, they have been widely used in absorption studies [215][216][217] and recently used in phytoremediation studies [188,205,[218][219]. The pseudo-first order kinetic equation and pseudo second order kinetic equation simply indicates if the reaction is more inclined towards physisorption or chemisorptions depending on the closeness of regression coefficient value (r 2 ) to unity (1).…”

Section: Chemometrics For Aquatic Phytoremediationmentioning

confidence: 99%

A review: Water pollution by heavy metal and organic pollutants: Brief review of sources, effects and progress on remediation with aquatic plants

Obinna

¹

,

Enyoh

²

2019

Anal. Method Environ. Chem. J.

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Heavy metals and organic pollutants are ubiquitous environmental pollutants affecting the quality of soil, water and air. Over the past 5 decades, many strategies have been developed for the remediation of polluted water. Strategies involving aquatic plant use are preferable to conventional methods. In this study, an attempt was made to provide a brief review on recent progresses in research and practical applications of phytoremediation for water resources with the following objectives: (1) to discuss the toxicity of toxic chemicals pollution in water to plant, animals and human health (2) to summarise the physicochemical factors affecting removal of toxic chemicals such as heavy metals and organic contaminants in aqueous solutions by aquatic plants; (3) to summarise and compare the removal rates of heavy metals and organic contaminants in aqueous solutions by diverse aquatic plants; and (4) to summaries chemometric models for testing aquatic plant performance.

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“…Duckweed (Lemna species) were studied for their capacity to remove organic compounds (estradiols, toluidine blue, benzotriazols) (NEAG & al [6], SCHRÖDER & al [1]), antimicrobials (IATROU & al [7], DI BACCIO & al [8]), herbicides (CHEN & SCHÄFFERM [9]) from wastewater or heavy metal polluted water (ROMERO-HERNÁNDEZ & al [10]) under different conditions in batch experiments. The result of the studies are indicating that knowledge are needed regarding plant metabolic features and growth characteristics in different abiotic conditions in order to select the most appropriate species (SCHRÖDER & al [2]).…”

Section: Introductionmentioning

confidence: 99%

Physiological profile of microbial communities associated with some plant aquatic species

Măruţescu¹,

Popa²,

Surugiu³

et al. 2019

Rom Biotechnol Lett.

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Freshwater is becoming an increasingly scarce resource in the entire world. An ecologically friendly and cost effective strategy to provide clean water is represented by phytoremediation, which is based on the ability of certain aquatic plants to recycle nutrients. Since the microorganisms that colonize plants are important for growth, the aim of this study was to investigate the plant microbial community functionality as Community-Level Physiological Profiles (CLPP) using EcoPlates™. Duckweed (Lemna minor, L. trisulca, Spiroldelaarrhiza, W. arrhiza) and water were sampled from Laboratory Aquariums of Faculty of Biology, University of Bucharest (Bucharest, Romania) and Lake Văcărești (Bucharest, Romania). The Shannon-Wiener and Simpson's indices indicated a high functional diversity in microbial communities attached to duckweed samples. The response from the Ecoplates showed which substrates support the growth of duckweed associated bacteria and free floating aquatic bacteria respectively. All 31 carbon sources were metabolized by duckweed associated bacteria, and only 12 were utilized by water samples: β-methyl-D-glucosidase, D-galactonic acid γ lactone, D-galacturonic acid L-asparagine, Tween 40, Tween 80, D-manitol, L-serine. A total of six carbon sources were preferred by microorganisms associated with duckweed plants: D-xylose, D-galacturonic acid, Tween 80, D-manitol, 4-hydroxy benzoic acid, glycogen In all the aquatic plant samples, while none preferred i-erythritol, 2-hydroxy benzoic acid, L-phenylalanine, α-cyclodextrin, N-acetyl-Dglucosamine, L-threonine, α-ketobutyric acid, D,L-α-glycerol phosphate and putrescein.

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Isotherm and kinetic modelling of Toluidine Blue (TB) removal from aqueous solution using Lemna minor

Cited by 23 publications

References 27 publications

Phytoremediation of Polluted Waterbodies with Aquatic plants: Recent Progress on Heavy Metal and Organic Pollutants

Phytoremediation of Polluted Waterbodies with Aquatic plants: Recent Progress on Heavy Metal and Organic Pollutants

A review: Water pollution by heavy metal and organic pollutants: Brief review of sources, effects and progress on remediation with aquatic plants

Physiological profile of microbial communities associated with some plant aquatic species

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