Batch and Column Studies for the Removal of Lead from Aqueous Solutions Using Activated Carbons from Viticultural Industry Wastes

Deiana, Ana Cristina; Giménez, Marianela; Rómoli, Santiago; Sardella, Fabiana; Sapag, Karim

doi:10.1260/0263-6174.32.2-3.181

Cited by 13 publications

(5 citation statements)

References 33 publications

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“…The coefficient of correlation (R 2 = 0.96), suggesting that this model resulted in a good fit to the experimental data compared to Yoon Nelson model. The obtained results were compared with other studies where agricultural waste used for the removal of Pb (II) is as shown in ( Table 2 ) [ [51] , [52] , [53] , [54] , [55] ].…”

Section: Resultsmentioning

confidence: 99%

“…According to the outcomes K YN has been increased from 0.026 to 0.035 (min −1 ) as flow rate increases from 5 to 10 (mL/min), whereas the 50% of τ reduced from 202 to 91 min with an increase in flow rate as depicted in Table 3 . The lower the K YN value result revealed that the mass transfer by the diffusion inside the column was better and higher the K YN value indicated the lower diffusion for the column [ [51] , [52] , [53] ].…”

Section: Resultsmentioning

confidence: 99%

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Column study using modified banana pseudo stem as adsorbent for removal of Pb (II)

Pawar¹,

Bagali²,

Uma³

et al. 2023

Heliyon

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Column study using modified banana pseudo stem as adsorbent for removal of Pb (II)

Pawar¹,

Bagali²,

Uma³

et al. 2023

Heliyon

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“…Several practices are applied to reduce lead concentration such as chemical precipitation, electrolysis, ion exchange, and adsorption (Deiana et al, 2014). From the thorough study of the literature, it is found that adsorption study is the best practice to remove lead ion concentration.…”

Section: Introductionmentioning

confidence: 99%

Effect of Modified Surface of Cotton Straw Nanocellulose and Their Application for Removal of Lead from Aqueous Solution

Sheetal

Pal

2023

Preprint

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In recent years, there is a rapid growth in nanotechnology. This study's goals were to first modify the nanocellulose surface using titanium dioxide (TiO2) to become nanocomposite and then determine how well a nanocomposite adsorbs lead ions from water. Nanocellulose was synthesized from the cotton straw residue using chemical and mechanical methods. The layer of titanium dioxide is coated on nanocellulose. The nanocomposite of titanium dioxide was characterized by using FTIR, XRD, and FESEM. The results showed that Ti-O-Ti bonding was observed at 505.02 cm-1. The structure of the nanocomposite is much more disordered and irregular. The presence of a 65 % anatase phase and 32 % rutile phase is found in the crystalline particle of the nanocomposite. The crystal structure of the nanocellulose and nanocomposite is found with particle sizes 18 nm and 83 nm. The nanocomposite was utilized to absorb lead ion concentration from the aqueous solution. The adsorption capacity of nanocomposite was analyzed with kinetics, isothermal and thermodynamic models. Kinetic parameters show that the pseudo 2nd order (R2=0.98) nonlinear kinetic model is the best fitted and in isotherm model Langmuir (R2=0.99), Elovich (R2=0.99) and Baudu (R2=0.99) isotherms were well suited for the adsorption of lead ions. Thermodynamic parameters resulted in Gibbs free energy decreasing with temperature.

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“…After oil extraction, the seeds form a lignocellulosic waste called lex. 18,19 Both wastes, stalk and seed lex, are currently used to produce only energy by burning and the development of products with added value from these wastes is of considerable interest.…”

Section: Introductionmentioning

confidence: 99%

“…It can be inferred that this surface carbon formed by grape must decomposition plays an important role during the reaction as suggested in Figure 9. 19 In fact, it has been suggested 10,11 that carbons can behave like the quinone-reductase enzymes, where the combination of quinone redox group with an efficient electron transport system is considered the key-features for an efficient catalyst. A similar mechanism can be proposed for the reaction in the presence of the activated carbon briquettes (Figure 9).…”

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confidence: 99%

Catalytic Oxidation of Aqueous Sulfide Promoted by Oxygen Functionalities on the Surface of Activated Carbon Briquettes Produced from Viticulture Wastes

Deiana

Giménez

Sardella

et al. 2014

Journal of the Brazilian Chemical Society

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Nesse trabalho, a oxidação catalítica do contaminante sulfeto em meio aquoso foi estudada na presença de carvão ativado na forma de briquetes mecanicamente resistentes e versáteis produzidos a partir de resíduos da indústria do vinho, i.e., semente e cachos. Caracterizações por microscopia eletrônica de varredura combinada com espectroscopia de dispersão de raios X (SEM/EDS), área superficial Brunauer-Emmett-Teller (BET), Raman, termogravimetria (TG), difração de raio X (XRD) e titulação potenciométrica indicam materiais com alta área mesoporosa e grande quantidade de grupos superficiais oxigenados. Esses briquetes mostraram alta atividade para a oxidação de sulfetos em meio aquoso, mesmo comparados com um carvão ativado comercial de elevada área superficial. A eficiência na oxidação de sulfeto é discutida em termos de dois efeitos: a elevada concentração de grupos superficiais redox do tipo quinona/hidroquinona formados a partir da decomposição do mosto da uva e a alta macro/mesoporosidade dos materiais que facilita a difusão das diferentes espécies durante a reação.In this work, the catalytic oxidation of the hazardous and unpleasant aqueous sulfide contaminant was investigated by activated carbon in the form of mechanically resistant and versatile briquettes produced from two different wastes of the wine industry, i.e., lex and stalk. Characterization by scanning electron microscopy with energy dispersive X-ray spectroscopy (SEM/EDS), surface area Brunauer-Emmett-Teller (BET), Raman, thermogravimetry (TG), X-ray diffractometry (XRD) and potentiometric titration showed that the materials have high mesoporous area with a large number of surface oxygen functionalities. These briquettes showed high efficiency for the oxidation of sulfides in aqueous medium, which is discussed in terms of two effects: the relatively high concentrations of quinone/hydroquinone surface redox groups formed from the grape must binder and the macro/mesoporosity, which facilitates the diffusion of the different species during the reaction.

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Batch and Column Studies for the Removal of Lead from Aqueous Solutions Using Activated Carbons from Viticultural Industry Wastes

Abstract: (A.C. Deiana). # The term 'pomace' refers to lex (Spanish), which is the residue from the solvent extraction of grape seed oil. The study used both pomace and grape stalk, another agricultural waste from the grape industry, as precursors of activated carbon.

Cited by 13 publications

References 33 publications

Column study using modified banana pseudo stem as adsorbent for removal of Pb (II)

Column study using modified banana pseudo stem as adsorbent for removal of Pb (II)

Effect of Modified Surface of Cotton Straw Nanocellulose and Their Application for Removal of Lead from Aqueous Solution

Catalytic Oxidation of Aqueous Sulfide Promoted by Oxygen Functionalities on the Surface of Activated Carbon Briquettes Produced from Viticulture Wastes

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