Adsorption of congo red using carbon from leaves and stem of water hyacinth: equilibrium, kinetics, thermodynamic studies

Extross, A.; Waknis, A.; Tagad, C.; Gedam, Vidyadhar V.; Pathak, Pranav D.

doi:10.1007/s13762-022-03938-x

Cited by 32 publications

(10 citation statements)

References 172 publications

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“…The negative values of Δ G ° and Δ H ° imply that the CR adsorption over CS-HAP-CeO 2 heterostructure are spontaneous and exothermic [ 65 ]. The values of Δ G ° slightly increased from −11.63 to −5.69 (kJ mol −1 ) with the rising temperature from 298 to 318 K, indicating the adsorption process is favored at lower temperatures [ 65 ]. The Δ S ° negative value implies a decrease in the randomness of the solid-solution interface.…”

Section: Resultsmentioning

confidence: 99%

Chitosan-Functionalized Hydroxyapatite-Cerium Oxide Heterostructure: An Efficient Adsorbent for Dyes Removal and Antimicrobial Agent

et al. 2022

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The current research intended to employ a facile and economical process, which is also ecofriendly to transform camel waste bones into novel heterostructure for cleansing of diverse waste waters. The bones of camel were utilized for preparation of hydroxyapatite by hydrothermal method. The prepared hydroxyapatite was applied to the synthesis of cerium oxide-hydroxyapatite coated with natural polymer chitosan (CS-HAP-CeO2) heterostructure. Being abundant natural polymer polysaccharide, chitosan possesses exceptional assets such as accessibility, economic price, hydrophilicity, biocompatibility as well as biodegradability, therefore style it as an outstanding adsorbent for removing colorant and other waste molecules form water. This heterostructure was characterized by various physicochemical processes such as XRD, SEM-EDX, TEM, and FT-IR. The CS-HAP-CeO2 was screened for adsorption of various industrially important dyes, viz., Brilliant blue (BB), Congo red (CR), Crystal violet (CV), Methylene blue (MB), Methyl orange (MO), and Rhodamine B (RB) which are collective pollutants of industrial waste waters. The CS-HAP-CeO2 demonstrated exceptional adsorption against CR dye. The adsorption/or removal efficiency ranges are BB (11.22%), CR (96%), CV (28.22%), MB (47.74%), MO (2.43%), and RB (58.89%) dyes. Moreover, this heterostructure showed excellent bacteriostatic potential for E. coli, that is liable for serious waterborne diseases. Interestingly, this work revealed that the incorporation of cerium oxide and chitosan into hydroxyapatite substantially strengthened antimicrobial and adsorption capabilities than those observed in virgin hydroxyapatite. Herein, we recycled the unwanted camel bones into a novel heterostructure, which assists to reduce water pollution, mainly caused by the dye industries.

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Section: Resultsmentioning

confidence: 99%

Chitosan-Functionalized Hydroxyapatite-Cerium Oxide Heterostructure: An Efficient Adsorbent for Dyes Removal and Antimicrobial Agent

et al. 2022

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“…Its surface presents a slightly more basic character, indicating that it can adsorb cationic dyes more easily in a certain pH range, but it also includes some acidic characteristics, indicating the presence of different active sites on its surface. This can be explained by the fact that S-Pure and L-Pure have adsorption capacities at pHs 3 and 5 [65].…”

Section: Adsorption Experimentsmentioning

confidence: 99%

“…The amount adsorbed increased rapidly over time, until the system reached equilibrium in approximately 60 min, after which there was no significant change in concentration, both for stem and leaf, indicating a rapid interaction, which is an extremely favorable parameter (Figure 4). can be explained by the fact that S-Pure and L-Pure have adsorption capacities at pHs 3 and 5 [65].…”

Section: Adsorption Experimentsmentioning

confidence: 99%

Application of Water Hyacinth Biomass (Eichhornia crassipes) as an Adsorbent for Methylene Blue Dye from Aqueous Medium: Kinetic and Isothermal Study

Carneiro

Barros²,

Morais³

et al. 2022

Polymers

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Water pollution has generated the need to develop technologies to remove industrial pollutants. Adsorption has been recognized as one of the most effective techniques for effluent remediation. In this study, parts (stem and leaves) of a problematic aquatic weed, the water hyacinth (Eichhornia crassipes), were separated to produce a bioadsorbent. The objective was to evaluate the adsorption of a cationic dye, methylene blue (MB), in an aqueous solution of the biomass from different parts of the water hyacinth (Eichhornia crassipes) plants. The materials were characterized through techniques of infrared spectroscopy, scanning electron microscopy, X-ray diffractometry, and thermogravimetric analysis, before and after the material adsorption. Water hyacinth biomasses presented adsorption capacity above 89%, and the kinetics was faster for stem biomass. The kinetic study found that the adsorption process is better described by the pseudo-second-order model, and the adjustments of the isotherm experimental data indicated that both materials are favorable for adsorption. Therefore, water hyacinth bioadsorbent represents a renewable resource with potential for effluent treatment.

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“…In addition, azo dyes, such as CR, feature complex aromatic molecular structures that are challenging to decompose. Therefore, ongoing research is focused on materials with the ability to adsorb CR. − The rarity of 1D chain CPs, Cd( S ) and Cd( R ), with nonporous attributes accentuates their unique capacity to rapidly adsorb CR, recognized as a global anionic dye. This study further unfolds new dimensions in the selective removal of azo dyes, positioning these nonporous 1D chain CPs based on cadmium at the forefront of remarkable, rapid, and efficient adsorption for CR.…”

Section: Introductionmentioning

confidence: 99%

[Cd₂((S,S)-IBPhe)₂(2,2′-bipy)₂]·2H₂O and [Cd₂((R,R)-IBPhe)₂(2,2′-bipy)₂]·2H₂O (IBPhe = Isophthaloyl-bis-phenylalanine): One-Dimensional Chiral Coordination Polymers with Selective Dye Adsorption

Koh,

2024

Crystal Growth & Design

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Two novel Cd-based noncentrosymmetric (NCS) chiral coordination polymers (CPs), [Cd 2 ((S,S)-IBPhe) 2 )] (IBPhe = isophthaloyl-bis-phenylalanine), have been synthesized through hydrothermal reactions. Cd(S) and Cd(R) crystallize in the monoclinic polar space group, P2 1 (No. 4), and exhibit rigid one-dimensional (1D) chain structures maintained by π−π interactions between organic ligands, as well as C−H•••π interactions with adjacent chains. The solid-state photoluminescence data reveal intriguing blue light emission characterized by a phosphorescence decay time of about 0.41 ms, attributed to ligand-to-ligand charge transfer effects. Impressively, these Cd-based compounds exhibit a high degree of stability across various solvents and pH conditions. Furthermore, their exceptional adsorption capacities for Congo red are evidenced by maximum adsorption efficiencies of 850.82 mg/g for Cd(S) and 817.71 mg/g for Cd(R). These findings underline the potential of these NCS chiral coordination polymers for diverse applications ranging from efficient dye removal to enhanced photoluminescence.

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Adsorption of congo red using carbon from leaves and stem of water hyacinth: equilibrium, kinetics, thermodynamic studies

Cited by 32 publications

References 172 publications

Chitosan-Functionalized Hydroxyapatite-Cerium Oxide Heterostructure: An Efficient Adsorbent for Dyes Removal and Antimicrobial Agent

Chitosan-Functionalized Hydroxyapatite-Cerium Oxide Heterostructure: An Efficient Adsorbent for Dyes Removal and Antimicrobial Agent

Application of Water Hyacinth Biomass (Eichhornia crassipes) as an Adsorbent for Methylene Blue Dye from Aqueous Medium: Kinetic and Isothermal Study

[Cd₂((S,S)-IBPhe)₂(2,2′-bipy)₂]·2H₂O and [Cd₂((R,R)-IBPhe)₂(2,2′-bipy)₂]·2H₂O (IBPhe = Isophthaloyl-bis-phenylalanine): One-Dimensional Chiral Coordination Polymers with Selective Dye Adsorption

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Adsorption of congo red using carbon from leaves and stem of water hyacinth: equilibrium, kinetics, thermodynamic studies

Cited by 32 publications

References 172 publications

Chitosan-Functionalized Hydroxyapatite-Cerium Oxide Heterostructure: An Efficient Adsorbent for Dyes Removal and Antimicrobial Agent

Chitosan-Functionalized Hydroxyapatite-Cerium Oxide Heterostructure: An Efficient Adsorbent for Dyes Removal and Antimicrobial Agent

Application of Water Hyacinth Biomass (Eichhornia crassipes) as an Adsorbent for Methylene Blue Dye from Aqueous Medium: Kinetic and Isothermal Study

[Cd2((S,S)-IBPhe)2(2,2′-bipy)2]·2H2O and [Cd2((R,R)-IBPhe)2(2,2′-bipy)2]·2H2O (IBPhe = Isophthaloyl-bis-phenylalanine): One-Dimensional Chiral Coordination Polymers with Selective Dye Adsorption

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[Cd₂((S,S)-IBPhe)₂(2,2′-bipy)₂]·2H₂O and [Cd₂((R,R)-IBPhe)₂(2,2′-bipy)₂]·2H₂O (IBPhe = Isophthaloyl-bis-phenylalanine): One-Dimensional Chiral Coordination Polymers with Selective Dye Adsorption