Application of water hyacinth root powder for Congo red dye removal in batch and continuous packed bed operation

Kulkarni, Rajeswari M.; Vaidya, Rahul; Srinivas, Siddarth; Anand, Siddharth; Narayana, Badari

doi:10.1007/s41204-021-00126-z

Cited by 3 publications

(4 citation statements)

References 40 publications

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“…Corroborating our results, Kulkarni et al [72] performed isothermal tests using water hyacinth root powder to remove Congo red dye in batch operation and in a continuous packed bed, whose values described the best result for Langmuir, where the maximum adoption capacity was 93.82 mg•g −1 .…”

Section: Adsorbent Qmax (Mg•gsupporting

confidence: 75%

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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Section: Adsorbent Qmax (Mg•gsupporting

confidence: 75%

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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“…After reaching maximum adsorption efficiency (91-98%), an increase in dosage does not have much dye sequestration efficiency. This is due to the gradient distribution and active site saturation between the adsorbent and dye [43,44]. Hence, 1.8 g adsorbent dose for TA-HA and 1.6 g of TA-CC were selected for further experiments as higher concentrations did not yield significant results.…”

Section: Effect Of Adsorbent Dosagementioning

confidence: 99%

“…Multilinear plots show a [67]. "C" values determine the thickness of the adsorbent layer [44]. When C = 0, adsorption is limited and intraparticle diffusion mechanism is involved.…”

Section: Effect Of Contact Timementioning

confidence: 99%

“…Carboxylate ions have pKa 3.0-5.0, below which it dissociates into positively charged species. In an acidic solution, CR dissociates into polar groups (SO 3 -) and adsorbs on positively charged adsorbent [44], inducing electrostatic interactions between the surface and dye [82]. Hydrogen bonding occurs between oxygen (carbonyl and carboxyl) and nitrogen-containing functional groups of CR and adsorbents [82].…”

Section: Thermodynamic Studiesmentioning

confidence: 99%

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Adsorptive Behavior of Tartaric Acid Treated Holarrhena antidysenterica and Citrullus colocynthis Biowastes for Decolourization of Congo Red Dye from Aqueous Solutions

Basharat

Rehman

Basharat

2022

Journal of Chemistry

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The aim of the present work is to eradicate Congo red (CR) dye from aqueous solutions since the dye compounds are harmful to human life and the environment leading to detrimental results. For this purpose, Holarrhena antidysenterica (HA) and Citrullus colocynthis (CC) adsorbents were used for the adsorptive removal of Congo red dye from wastewaters. The unmodified adsorbents (U-HA and U-CC) were chemically modified using tartaric acid (TA). Morphological structures were examined by FTIR and SEM. Batch adsorption studies were tested at a variety of pH, time exposure, temperatures, and adsorbent dosages. Thermodynamic parameters such as Gibbs free energy ( ∆ G ° ), enthalpy ( ∆ H ° ), entropy changes ( ∆ S ° ), and energy of activation ( E a ) were also calculated. The results revealed that tartaric acid-Citrullus colocynthis (TA-CC) gave optimum conditions of time of contact (35 min), temperature conditions (40°C), pH (3), and dosage of adsorbent (1.6 g) for maximum dye removal. Tartaric acid-Holarrhena antidysenterica (TA-HA) gave equilibrium time of contact (30 min), temperature (40°C), and pH optimum (2) along with a 1.6 g dosage of adsorbent. Mechanistic understanding of adsorption isotherm provided that the Langmuir model was followed by raw and modified adsorbents. Maximum adsorption capacities Q max attained were 60.61 (mg g-1), 128.21 (mg g-1), 87.71 (mg g-1), and 131.57 (mg g-1), respectively, for U-HA, TA-HA, U-CC, and TA-CC. The results of kinetic modeling displayed a high value of R 2 (0.99) along with minimal error (RMSE) for dye removal showing that the pseudo-second-order kinetic model has acceptable accuracy. Fourier transform infrared proposed the electrostatic, pi-pi interactions, and hydrogen bonding as dominant adsorption mechanisms at acidic pH, respectively. Rate-determining steps comprise both surface and intraparticle diffusions. Thermodynamics indicated that the dye adsorption of CR is spontaneous, exothermic, and favorable in nature. These agricultural wastes due to specific points such as low cost, availability, and high removal rates of adsorption are highly competent for the expulsion of anionic dye like CR from wastewaters.

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Recent trends in biosorption: the removal of emerging dye pollutants from aqueous medium

Boussaksou,

Aoulad El Hadj Ali,

Azzouz

et al. 2024

Euro-Mediterr J Environ Integr

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Application of water hyacinth root powder for Congo red dye removal in batch and continuous packed bed operation

Cited by 3 publications

References 40 publications

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

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

Adsorptive Behavior of Tartaric Acid Treated Holarrhena antidysenterica and Citrullus colocynthis Biowastes for Decolourization of Congo Red Dye from Aqueous Solutions

Recent trends in biosorption: the removal of emerging dye pollutants from aqueous medium

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