Biosorption of zinc metal ion in aqueous solution using biowaste of Pithophora cleveana Wittrock and Mimusops elengi

Kalyani, G.; Gokulan, R.; Sujatha, S.

doi:10.5004/dwt.2021.27005

Cited by 14 publications

(9 citation statements)

References 32 publications

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“…The ionic speciation of the adsorbate laid in the required region controlled the adsorption process. It was assessed using the Thomas model [68]. The measured and predicted breakthrough curve for the adsorption process agreed, as evidenced by the maximum regression coefficient value (R2) for a 10 cm column, which was 0.972.…”

Section: Adsorption Experiments Analysed By Thomson Modelmentioning

confidence: 85%

“…Therefore, azo dyes are genotoxic, mutagenic, carcinogenic, and have deadly consequences on both people and animals. The reckless release of azo dyes into the environment, especially from the textile industry, is of great concern to both human health and the environment [12]. One of the unit activities in the chemical engineering procedures used to treat the wastewater from the textile industry is adsorption [13].…”

Section: Introductionmentioning

confidence: 99%

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Valorization of Annona reticulata biochar by chitosan for the adsorption of Azo dye from Textile effluent

2023

Global NEST: The International Journal

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<p>Azo dye is a synthetic aromatic dye which are direct dye frequently used in textile industry to colour fibres. It also contributes to the damage of the environment. This study examines the adsorption biochar made from Annona reticulata to remove azo dye from textile wastewater. To improve the adsorption capacity, biochar valorized by chitosan molecules, Investigations were conducted on the use of chitosan-based materials that are acid-resistant for azo dye adsorption. In the batch experiment, basic operating parameters such as initial Azo dye concentrations, pH, contact time and bed height were assessed. The percentage removal efficiency for Azo dye was recorded as 67.18%, 75.88% and 94.37% for three dissimilar sized columns that were 6cm, 8cm, and 10cm. The UV–visible absorption spectroscopy was used to quantify the decolorization of dyes. The changed surface properties of the adsorbent produced from Annona reticulata were characterized by using SEM, XRD, and FTIR. The effectiveness of the column's adsorption was calculated mathematically by Yoon-Nelson, Thomas, and Adams-Bohart models. The model that best represents equilibrium isotherm data by adsorption had R2 values of 94.63, 86.67 and 96.35 respectively.</p>

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Section: Adsorption Experiments Analysed By Thomson Modelmentioning

confidence: 85%

Section: Introductionmentioning

confidence: 99%

Valorization of Annona reticulata biochar by chitosan for the adsorption of Azo dye from Textile effluent

2023

Global NEST: The International Journal

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“…In general, adsorption can be divided into physical adsorption and chemical adsorption. To demonstrate the adsorption mechanism of PCMCA-900, the pseudo-first-order and pseudo-secondorder kinetic models were used to illustrate the adsorption mechanism [62,63]. The pseudo-first-order and pseudo-second-order kinetic models can be described in the following equations:…”

Section: Congo Red Adsorption Analysismentioning

confidence: 99%

Potassium citrate-derived porous carbon with high CO2 capture and Congo red adsorption performance

Wang

Zhang

et al. 2023

Environ Sci Eur

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The objective is to achieve the goal of carbon neutrality, controlling CO2 emissions is a primary problem to be solved in the current environmental protection field. Eliminating the environmental pollution of dyes in industrial wastewater is also an urgent problem to be solved in the field of environmental protection. The adsorption technique is an effective way to deal with these two issues. Developing high-efficiency adsorbents is an essential work in the adsorption field. In this work, a simple carbonization method has been developed to prepare porous carbon. The morphology and structure of the prepared porous carbon were investigated by scanning electron microscopy, X-ray photoelectron spectroscopy, X-ray diffraction, and surface area measurement. By studying the influence of preparation conditions on the structure and properties of the prepared carbon materials, it was found that the carbon materials prepared at 900 ℃ (PCMCA-900) exhibited a high specific surface area of 1476 m2 g−1 and a high total pore volume of 0.951 cm3 g−1. The PCMCA-900 showed the highest CO2 uptake of 7.67 mmol g−1 at 0 ºC and the adsorption capacity of PCMCA-900 decreased by less than 5% after 10 times recycling. Moreover, when PCMCA-900 was used as an adsorbent to remove Congo red in water, an adsorption capacity of 652.3 mg g−1 was achieved. Therefore, potassium citrate-derived porous carbon is a desirable candidate for excellent CO2 adsorption and Congo red in industrial wastewater.

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“…Generally, the organic materials obtained from animals or plants including their waste by-products are collectively called biomass Sundar et al, 2021;Kalyani et al, 2021). Biomass is divided into three categories based on the source from which they are…”

Section: Introductionmentioning

confidence: 99%

Feasibility of spent macroalgae biochar for removal of Acid Red 88 (AR) dye from its aqueous solution

2022

Global NEST: The International Journal

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<p>Biochar was synthesized from Kappaphycus alvarezii reject (KR) remove the anionic azo dye, Acid Red 88 from wastewater. In this study, biochar was experimented in both batch and column adsorption studies. Batch adsorption studies were performed at varying temperature (25 – 40 °C), dosage (1 – 10 g), pH (4 – 10), time (30 – 90 min) and dye concentration (25 – 125 mg/L) respectively. From the batch adsorption studies, it was seen that maximum removal efficiency was 87.64% at 75ppm, dosage of 4 g/L, time of 60 min and pH 7 respectively. The batch adsorption experiment best fitted to Freundlich isotherm model with Pseudo-second-order kinetics indicating the adsorption to follow chemisorption mechanism process along with multilayer adsorption onto biochar’s uneven adsorption sites. It was clear from this study, that Kappaphycus alvarezii reject has the potential to serve as economical biochar as it can be utilized as an adsorbent for the efficient removal of colorants from wastewater.</p>

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Biosorption of zinc metal ion in aqueous solution using biowaste of Pithophora cleveana Wittrock and Mimusops elengi

Cited by 14 publications

References 32 publications

Valorization of Annona reticulata biochar by chitosan for the adsorption of Azo dye from Textile effluent

Valorization of Annona reticulata biochar by chitosan for the adsorption of Azo dye from Textile effluent

Potassium citrate-derived porous carbon with high CO2 capture and Congo red adsorption performance

Feasibility of spent macroalgae biochar for removal of Acid Red 88 (AR) dye from its aqueous solution

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