Enhanced adsorption of Cr(VI), Ni(II) ions from aqueous solution using modified Eichhornia crassipes and Lemna minor

Maheswari, B. Uma; Sivakumar, V. M.; Marimuthu, Thirumarimurugan

doi:10.1007/s11356-019-06357-7

Cited by 20 publications

(7 citation statements)

References 56 publications

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“…On the other hand, q e increases on increasing metal concentration as more active binding sites were available for adsorption. Other investigators also studied similar results using other adsorbents like Eichhornia crassipes and Lemna minor (Hassoon and Najem 2017;Balasubramanian et al 2019), Alligator weed (Wang et al 2008).…”

Section: Effect Of Initial Metal Concentrationmentioning

confidence: 65%

Adsorption of chromium (Cr6+) on dead biomass of Salvinia molesta (Kariba weed) and Typha latifolia (broadleaf cattail): isotherm, kinetic, and thermodynamic study

2021

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This study evaluated the adsorption of Cr6+ from aqueous solution using dead biomass of aquatic plants Salvinia molesta (Kariba weed) and Typha latifolia (broadleaf cattail). The batch experiments were carried out to study the effects of pH, adsorbent dose, initial metal concentration, contact time, agitation speed in rotation per minute (rpm), and temperature. Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM) were used to characterize the adsorbent and analyze the functional groups and morphology of the adsorbent, respectively. The hydroxyl and amine groups were the main functional groups involved in the adsorption. Both adsorbents showed good results at pH 1, metal concentration of 20 mg/L for Cr6+ removal, and adsorption equilibrium was attained within 60 min with 150 rpm at 25 °C. The adsorption rate obtained was above 95% for both the adsorbents at a dose of 0.150 g for S. molesta and 0.8 g for T. latifolia. Isotherm and kinetic models were applied on the adsorption data. The monolayer adsorption capacity (qm) was found to be 33.33 mg/g for S. molesta and 10.30 mg/g for T. latifolia. The Langmuir isotherm was better fitted to S. molesta, while the Freundlich isotherm was better fitted to T. latifolia. It was reported that the pseudo-second-order model (R2 = 0.999) was better fitted to the adsorption data for both the adsorbents. The thermodynamic study was also conducted and found the adsorption process was exothermic and spontaneous. Results revealed the good adsorption potential of S. molesta and T. latifolia, and they can be used for the removal of hexavalent chromium.

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Section: Effect Of Initial Metal Concentrationmentioning

confidence: 65%

Adsorption of chromium (Cr6+) on dead biomass of Salvinia molesta (Kariba weed) and Typha latifolia (broadleaf cattail): isotherm, kinetic, and thermodynamic study

2021

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“…This may firstly be due to the higher dissolution potential of CO 2 as compared with O 2 (approximately × 100 more); the solution becomes relatively acidic. Secondly, the anionic dyes possess a net-negative charge thereby causing repulsion with roots of water hyacinth and making the solution acidic or decreasing the pH (Balasubramanian et al 2019). Here in the present experiment, two different types of dyes are used: one is cationic and the other is anionic, so the pH study reveals the nature by determining their acidic or basic characters.…”

Section: Resultsmentioning

confidence: 99%

“…Biological pollution such as plant-based treatment of textile is comparatively novel and therefore has been sustained as an unrevealed area in the field of plant-based remediated research (Gaballah et al 2020;Schröder et al 2002). In the bygone decades, plant-based remediation approaches have punctiliously been scrutinized as an implicit tool to eliminate or remove any hazardous environmental defilements/pollutants like farm pesticides, heavy elements, ground fill leachates and chlorinated solvents (McCutcheon and Schnoor 2004;Balasubramanian et al 2019). But as these dyes are used and released from the industries that deal with fibre and its construction from raw to manufacture goods, they contribute as a potent pollutant and are mostly carcinogenic.…”

Section: Introductionmentioning

confidence: 99%

Removal of organic dyes from wastewater using Eichhornia crassipes: a potential phytoremediation option

Sharma

Saini

Paul

et al. 2020

Environ Sci Pollut Res

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Wastewater from textile industries is a potential source of organic dyes in natural water bodies. Environmental concerns of chemical methods for removal of dyes from wastewater are no more a viable solution, and there is growing concern to develop alternative approaches such as green chemistry and phytoremediation. This study reports the removal of organic dyes from wastewater using Eichhornia crassipes (Mart.) Solms (water hyacinth), as an easily available and fast-growing plant species. Growth of water hyacinth among individual cationic (rose bengal (RB), methylene blue (MB), crystal violet (CV), auramine O (AO), rhodamine B (RhB) and anionic (xylenol orange (XO), phenol red (PR), cresol red (CR), methyl orange (MO)) dye solutions and degradation of dyes were monitored. Results indicated that water hyacinth has good absorption and degradation potential for both types of dyes (cationic or anionic) and effectively removes dyes from solution. Water hyacinth can be used as a suitable and effective phytoremediate for removal of organic dyes from the wastewater.

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“…The band at 1543 cm −1 was ascribable to the stretching vibration of C-N of the peptidic bond of proteins; 1450 cm −1 to phenolic -O-H and C-O stretching of carboxylates; 1315 cm −1 to C-H vibration in cellulose; 1240 cm −1 to the vibration of carboxylic acids; and 1065 and 890 cm −1 to the vibration of C-O-C of polysaccharides. The hemicellulose peaks are located at 1378 cm −1 and 780 cm −1 , assigned to the carboxyl groups (β-glycosidic linkages (1→4) between xylose units), while the peak for amorphous cellulose molecules can be found at 830 cm −1 [32,41]. XRD: The results of XRD characterization showed that pristine duckweed exhibited diffraction peaks at 2θ around 13.0° and 20.0°, corresponding to (1 1 0), (1 1 0), typical of the cellulose structure and starch component [39,42,43] (Figure 1d).…”

Section: Characterization Of Pristine Duckweedmentioning

confidence: 99%

Cellulose Nanocrystals and Lignin Nanoparticles Extraction from Lemna minor L.: Acid Hydrolysis of Bleached and Ionic Liquid-Treated Biomass

Puglia,

Luzi,

Tolisano

et al. 2024

Polymers

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Using biomass to develop and obtain environmentally friendly and industrially applicable biomaterials is increasingly attracting global interest. Herein, cellulose nanocrystals (CNCs) and lignin nanoparticles (LNPs) were extracted from Lemna minor L., a freshwater free-floating aquatic species commonly called duckweed. To obtain CNCs and LNPs, two different procedures and biomass treatment processes based on bleaching or on the use of an ionic liquid composed of triethylammonium and sulfuric acid ([TEA][HSO4]), followed by acid hydrolysis, were carried out. Then, the effects of these treatments in terms of the thermal, morphological, and chemical properties of the CNCs and LNPs were assessed. The resulting nanostructured materials were characterized by using Fourier-transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD) spectroscopy, thermo-gravimetric analysis (TGA), and scanning electron microscopy (SEM). The results showed that the two methodologies applied resulted in both CNCs and LNPs. However, the bleaching-based treatment produced CNCs with a rod-like shape, length of 100–300 nm and width in the range of 10–30 nm, and higher purity than those obtained with ILs that were spherical in shape. In contrast, regarding lignin, IL made it possible to obtain spherical nanoparticles, as in the case of the other treatment, but they were characterized by higher purity and thermal stability. In conclusion, this research highlights the possibility of obtaining nanostructured biopolymers from an invasive aquatic species that is largely available in nature and how it is possible, by modifying experimental procedures, to obtain nanomaterials with different morphological, purity, and thermal resistance characteristics.

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Enhanced adsorption of Cr(VI), Ni(II) ions from aqueous solution using modified Eichhornia crassipes and Lemna minor

Cited by 20 publications

References 56 publications

Adsorption of chromium (Cr6+) on dead biomass of Salvinia molesta (Kariba weed) and Typha latifolia (broadleaf cattail): isotherm, kinetic, and thermodynamic study

Adsorption of chromium (Cr6+) on dead biomass of Salvinia molesta (Kariba weed) and Typha latifolia (broadleaf cattail): isotherm, kinetic, and thermodynamic study

Removal of organic dyes from wastewater using Eichhornia crassipes: a potential phytoremediation option

Cellulose Nanocrystals and Lignin Nanoparticles Extraction from Lemna minor L.: Acid Hydrolysis of Bleached and Ionic Liquid-Treated Biomass

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