Utilization of pumpkin (Cucurbita pepo) seed husks as a low-cost sorbent for removing anionic and cationic dyes from aqueous solutions

Kowalkowska, Agata; Jóźwiak, Tomasz

doi:10.5004/dwt.2019.24761

Cited by 20 publications

(12 citation statements)

References 37 publications

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“…Deprotonated functional groups act as sites for binding of cationic dye. Similar results were observed in pumpkin seed husk by Kowalkowska and Jozwiak [43], who showed the effect of pH on BR46 uptake. However at high pH, due to protonation of electron-rich regions on the OPB surface, positive surface charge can be formed and its density increases gradually, resulting in reduced dye removal [44].…”

Section: Impact Of Various Parameters On Br46 Dye Sorption By Opbsupporting

confidence: 88%

Adsorptive Potential of Orange Peel Biochar for Removal of Basic Red 46 Dye and Phytotoxicity Analysis

Kapoor

Sivamani²

2023

Chem Eng & Technol

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This study assessed the sorption ability of orange peel biochar (OPB) for the removal of Basic Red 46 (BR46) dye. Batch trials were conducted to examine the effects of pH, time, initial dye concentration, dosage, temperature, and particle size on BR46 removal from aqueous solution. Maximum removal by OPB of 94 % was observed at pH 9 and an initial dye concentration of 100 mg L -1 . The surface morphology of OPB was characterized by scanning electron microscopy. Equilibrium data were well fitted to the Langmuir model with maximum sorption capacity of 7.36 mg g -1 . Adsorption kinetics and thermodynamics revealed a pseudo-second-order mechanism, chemisorption, and an exothermic process. Phytotoxicity studies revealed that OPB-treated effluent can be used for irrigation. Thus, OPB could be a potential adsorbent for BR46 removal.

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Section: Impact Of Various Parameters On Br46 Dye Sorption By Opbsupporting

confidence: 88%

Adsorptive Potential of Orange Peel Biochar for Removal of Basic Red 46 Dye and Phytotoxicity Analysis

Kapoor

Sivamani²

2023

Chem Eng & Technol

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“…The positive effect of low pH on the sorption of anionic dyes has also been observed in studies addressing the decolorization of aqueous solutions on other biomass-based unconventional sorbents, such as: the husk of sunflower seeds [ 34 ], pumpkin [ 35 ], cotton [ 36 ], and also activated carbons based on palm shells [ 37 ] or bamboo [ 38 ].…”

Section: Resultsmentioning

confidence: 81%

Aminated Rapeseed Husks (Brassica napus) as an Effective Sorbent for Removing Anionic Dyes from Aqueous Solutions

Jóźwiak,

Filipkowska

2024

Molecules

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The study investigated the effect of modifying rapeseed husks with ammonia and epichlorohydrin on their sorption capacity against anionic reactive dyes: Reactive Black 5 (RB5) and Reactive Yellow 84 (RY84). Its scope included sorbents characterization (FTIR, pHPZC), determination of pH influence on the sorption effectiveness of dyes, the adsorption kinetics of dyes, as well as the maximum sorption capacity. The study proved that the reaction of rapeseed husk biomass with ammonia can lead to its amination, namely to the introduction of amine functional groups into the material’s structure. The sorption effectiveness of RB5 and RY84 on the tested sorbents was the highest in the pH range of 2–3. The dye sorption kinetics was well described by the pseudo-second-order model. The sorption equilibrium time ranged from 90 to 180 min, and depended on the initial concentration of dyes and the number of amino groups on the sorbent’s surface. The most efficient of the sorbents tested were rapeseed husks pre-activated with epichlorohydrin and then aminated with ammonia. Their sorption capacity determined for RB5 and RY84 was 135.83 mg/g and 114.23 mg/g, respectively, which was 794% and 737% higher than that of the non-modified husks.

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“…13 In addition, there were studies which investigated the potential of low-cost adsorbents using pumpkin seed powder. 14,15…”

Section: Introductionmentioning

confidence: 99%

“…13 In addition, there were studies which investigated the potential of low-cost adsorbents using pumpkin seed powder. 14,15 Despite so many studies on carotenoids, studies focusing on their coloring and coloration properties are in the minority. 16 For dyeing application to textile materials, there were, to the best knowledge of us, no published articles in this area.…”

Section: Introductionmentioning

confidence: 99%

Extraction and Application of Pumpkin Peel Colorants for Natural Textile Dyeing

Che

Teng

2023

AATCC Journal of Research

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This preliminary research discusses the extraction of colorants from pumpkin peel as vegetable dyes and the potential dyeing capability of silk and cotton fabrics. For pumpkin extracts, thermal gravity analysis has verified the range of temperature for application, while a combination of UV–vis spectra and high-performance liquid chromatography analysis confirmed the main colored components and structural characteristics. It was found that the extracts of this vegetable dye have excellent thermal stability as well as stability in neutral and acid conditions. With the objective of achieving the greatest absorbency rate of extracted solution, the following optimum extraction conditions were obtained: 100% ethanol, an extraction temperature of 70°C, an extraction time of 60 min, and a material-to-liquor ratio of 1:10. To attain the highest dyeing uptake rate and K/ S values, the optimum dyeing profiles with meta-mordanting for silk fabrics were found to be 95°C, 90 min, pH 5.5, and a liquid ratio of 1:60. The optimum dyeing profiles with meta-mordanting for cotton fabrics were 95°C, 90 min, and a liquid ratio of 1:60. Nearly all colorfastness results for silk and cotton fabrics met the basic requirement of the China National Standard, except a few.

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Utilization of pumpkin (Cucurbita pepo) seed husks as a low-cost sorbent for removing anionic and cationic dyes from aqueous solutions

Cited by 20 publications

References 37 publications

Adsorptive Potential of Orange Peel Biochar for Removal of Basic Red 46 Dye and Phytotoxicity Analysis

Adsorptive Potential of Orange Peel Biochar for Removal of Basic Red 46 Dye and Phytotoxicity Analysis

Aminated Rapeseed Husks (Brassica napus) as an Effective Sorbent for Removing Anionic Dyes from Aqueous Solutions

Extraction and Application of Pumpkin Peel Colorants for Natural Textile Dyeing

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