Fabrication of dual cross-linked spherical treated waste biomass/alginate adsorbent and its potential for efficient removal of lead ions from aqueous solutions

Mohammadabadi, Siroos Iravani; Javanbakht, Vahid

doi:10.1016/j.indcrop.2021.113575

Cited by 23 publications

(9 citation statements)

References 79 publications

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“…As investigated by Pelalak et al [22] the adsorption time effect for Cd(II) and Pb(II) adsorption on Ash/GO/Fe3O4 nanocomposite at reaction time was in the range of 5 to 150 min. Meanwhile, biocomposite alginate/treated biomass, as reported by Mohammadabadi and Javanbakht [23], adsorbed a large part of Pb(II) ions less than 2 h. Over time, when the adsorbent becomes saturated with adsorbate, the adsorption rate of, as a consequence, stabilizes in order to reach equilibrium state.…”

Section: Effect Of Si-kit Adsorbent Weights and Contact Time On Adsor...mentioning

confidence: 77%

Potential of silica from water treatment sludge modified with chitosan for Pb(II) and color adsorption in sasirangan waste solution

Wicakso

Mirwan

Agustin

et al. 2022

CST

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Water treatment sludge (WTS) still contains a lot of silica oxide (SiO2) as much as 43.12-66.90% by weight and can act as an adsorbent to be applied to the treatment of Sasirangan wastewater. Silica extraction from WTS was carried out by microwave-assisted leaching, which - compared to conventional extraction - had several advantages including high extraction yields, fast, uniform, and more selective processing time. In addition, Sasirangan liquid waste is a by-product of the dyeing process of Sasirangan cloth, which still contains heavy metals in amounts exceeding the quality standard. This study aims to extract silica from WTS by microwave-assisted leaching process to synthesize silica modified by chitosan (Si-Kit) as an adsorbent to reduce Pb(II) from Sasirangan wastewater, and to obtain a kinetic model of the adsorption process. The silica from microwave-assisted leaching process (Si-MaL) and Si-Kit adsorbents were characterized using FTIR and SEM. The results showed that the dominant functional groups of Si-Kit included Si-O-Si, Si-O-C stretching vibrations, and stretching vibration of C=N showing that the condensation between aldehyde groups and amino groups occurred to form base after the addition of glutaraldehyde. The SEM images showed that Si-MaL and Si-Kit adsorbent obviously increased in particle size with the presence of visible particles of homogeneous granules and large pores. The removal efficiency percentage of Pb(II) and color occurred at 6% w/v adsorbent weight and 70 min was 87.20% and 61.87% respectively. Meanwhile, the adsorption kinetics of Pb(II) and color followed the zero order kinetics model at weight variation of 6%-w/v based on the value of R2 close to one and the adsorption capacity of Pb(II) ion and color were 12.01 mg g-1 and 467 mg g-1, respectively.

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Section: Effect Of Si-kit Adsorbent Weights and Contact Time On Adsor...mentioning

confidence: 77%

Potential of silica from water treatment sludge modified with chitosan for Pb(II) and color adsorption in sasirangan waste solution

Wicakso

Mirwan

Agustin

et al. 2022

CST

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“…the adsorbent surface, is positively charged, the expected tendency is to reduce the dye adsorption because of the electrostatic repulsion between the cationic dye molecules and the adsorbent surface. 29…”

Section: Tga Analysis Resultsmentioning

confidence: 99%

“…At high pH values (pH > pH ZPC ), the adsorbent surface is negatively charged, and the adsorption of dye molecules increases because of the electrostatic adsorption between the surface and the cationic dye molecules. At low pH values (pH < pH ZPC ), as the adsorbent surface, is positively charged, the expected tendency is to reduce the dye adsorption because of the electrostatic repulsion between the cationic dye molecules and the adsorbent surface 29 …”

Section: Resultsmentioning

confidence: 99%

A novel foam of geopolymer based on ZSM‐5 zeolite fabricated using templating emulsion/chemical foaming method and its application in batch and continuous dye removal systems

Monjezi

Javanbakht

2023

Env Prog and Sustain Energy

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Geopolymers as sustainable and environmentally friendly “green materials,” can be synthesized by utilizing waste material and by‐products. A porous geopolymer foam adsorbent based on ZSM‐5 zeolite was prepared using templating emulsion/chemical foaming method in different conditions and used for removal of low‐concentration dye in batch and continuous systems. The parameters affecting the dye adsorption including temperature, concentration, pH, kinetics, isotherm, and thermodynamics of the process were investigated. The results of the geopolymer foam synthesis showed that thermal pretreatment of the zeolite has a positive effect on the strength and adsorption capacity. Moreover, the increase in sodium silicate more than the stoichiometric reduces the strength and adsorption capacity. The findings obtained from the batch adsorption process showed that the adsorption kinetics of the pseudo‐second‐order model and the adsorption isotherm of the Temkin model is adjusted with the experimental data. Thermodynamic results indicated that the process of dye adsorption with geopolymer foam is exothermic. The results from continuous experiments indicated more compatibility of the adsorption process with the models of Thomas and Bohart–Adams. The maximum adsorption capacity of methylene blue in batch and continuous processes was 9.82 and 8.17 mg/g. The adsorbent reduction was performed successfully by chemical and thermal processes.

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“…Boyd’s model assumes the adsorption process occurs through the stagnant film around the external surface of the adsorbent (external or film diffusion) or intrapore (intraparticle diffusion) [ 30 ]. Once the Bt × Time graph generates a straight fit linear regression, and it still crosses the origin, it is assumed by the evaluated time range that the main resistance to mass transfer is in the diffusion inside the pores (intraparticle) [ 72 ].…”

Section: Resultsmentioning

confidence: 99%

Pb(II) Ion Removal Potential in Chemically Modified Ziziphus joazeiro Barks

Santos

Costa²,

Menezes

et al. 2022

IJERPH

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In this study, five types of modified Ziziphus joazeiro barks were investigated for the removal of Pb(II) ions from aqueous solutions. The samples tested were natural barks, natural powder, washed with water, ethanol at 80% (EE) and 0.5 N NaOH. Batch kinetics experiments were performed under the conditions: 24–25 °C, pH 5.5–5.8, 102 mg·L−1 Pb(NO3)2, 100 rpm and 0.1 g of adsorbent, and analyses of pHpzc and Fourier transform infrared spectroscopy. All adsorbents tested showed potential to remove Pb(II) ions, but the adsorbent washed by 0.5 N NaOH obtained the highest experimental performance (25.5 mg·g−1 at 30 min), while the EE had the least performance (20.4 mg·g−1 at 60 min), and maximum removals of 99.9%. The kinetic models pointed to a probable chemisorption due to the best fit of pseudo-second order and Elovich, and Boyd’s model, suggesting that intraparticle diffusion limits the adsorption until the initial minutes of contact. The Langmuir isotherm fitted better to the experimental data for the NaOH adsorbent, with maximum adsorption capacity equal to 62.5 mg·g−1, although the Temkin model partially fitted, both suggesting the occurrence of chemisorption. The adsorption process is reversible (>81% at 20 min) and hence the adsorbents can be recycled and the Pb(II) ions recovered.

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Fabrication of dual cross-linked spherical treated waste biomass/alginate adsorbent and its potential for efficient removal of lead ions from aqueous solutions

Cited by 23 publications

References 79 publications

Potential of silica from water treatment sludge modified with chitosan for Pb(II) and color adsorption in sasirangan waste solution

Potential of silica from water treatment sludge modified with chitosan for Pb(II) and color adsorption in sasirangan waste solution

A novel foam of geopolymer based on ZSM‐5 zeolite fabricated using templating emulsion/chemical foaming method and its application in batch and continuous dye removal systems

Pb(II) Ion Removal Potential in Chemically Modified Ziziphus joazeiro Barks

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