Removal of Heavy Metals From Water by Wood-Based Lignocellulocis Materials

Pešić, Batrić

doi:10.2495/wrm170081

Cited by 3 publications

(3 citation statements)

References 13 publications

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“…The sorption isotherm is essential and of functional significance, as it shows the systematic sorptions features (monolayer against multi-layer), heterogeneity of a surface, and the sorbate and sorbent interactions. It also provides information on the loading sorbent capacity for functional purposes [73]. The sorption capacities of the studied biosorbents were evaluated by corresponding equilibrium isotherm model constructions employing Langmuir (LNR), Freundlich (FRH), and Temkin models [74].…”

Section: Biosorption Isothermsmentioning

confidence: 99%

Copper(II) ion removal by chemically and physically modified sawdust biochar

Eleryan

Aigbe

Ukhurebor

et al. 2022

Biomass Conv. Bioref.

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The difference between physical activations (by sonications) and chemical activations (by ammonia) on sawdust biochar has been investigated in this study by comparing the removal of Cu(II) ions from an aqueous medium by adsorption on sawdust biochar (SD), sonicated sawdust biochar (SSD), and ammonia-modified sawdust biochar (SDA) with stirring at room temperature, pH value of 5.5–6.0, and 200 rpm. The biochar was prepared by the dehydrations of wood sawdust by reflux with sulfuric acid, and the biochar formed has been activated physically by sonications and chemically by ammonia solutions and then characterized by the Fourier transform infrared (FTIR); Brunauer, Emmett, and Teller (BET); scanning electron microscope (SEM); thermal gravimetric analysis (TGA); and energy-dispersive spectroscopy (EDX) analyses. The removal of Cu(II) ions involves 100 mL of sample volume and initial Cu(II) ion concentrations (conc) 50, 75, 100, 125, 150, 175, and 200 mg L−1 and the biochar doses of 100, 150, 200, 250, and 300 mg. The maximum removal percentage of Cu(II) ions was 95.56, 96.67, and 98.33% for SD, SSD, and SDA biochars, respectively, for 50 mg L−1 Cu(II) ion initial conc and 1.0 g L−1 adsorbent dose. The correlation coefficient (R2) was used to confirm the data obtained from the isotherm models. The Langmuir isotherm model was best fitted to the experimental data of SD, SSD, and SDA. The maximum adsorption capacities (Qm) of SD, SSD, and SDA are 91.74, 112.36, and 133.33 mg g−1, respectively. The degree of fitting using the non-linear isotherm models was in the sequence of Langmuir (LNR) (ideal fit) > Freundlich (FRH) > Temkin (SD and SSD) and FRH (ideal fit) > LNR > Temkin (SDA). LNR and FRH ideally described the biosorption of Cu(II) ions to SD and SSD and SDA owing to the low values of χ2 and R2 obtained using the non-linear isotherm models. The adsorption rate was well-ordered by the pseudo-second-order (PSO) rate models. Finally, chemically modified biochar with ammonia solutions (SDA) enhances the Cu(II) ions’ adsorption efficiency more than physical activations by sonications (SSD). Response surface methodology (RSM) optimization analysis was studied for the removal of Cu(II) ions using SD, SSD, and SDA biochars.

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Section: Biosorption Isothermsmentioning

confidence: 99%

Copper(II) ion removal by chemically and physically modified sawdust biochar

Eleryan

Aigbe

Ukhurebor

et al. 2022

Biomass Conv. Bioref.

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“…Pollution becomes one major problem facing by the world. It is increasing day to day and the quality of environment becomes degrading [1]. Pollution is occurring in the ways like water pollution, air pollution and land pollution etc.…”

Section: Introductionmentioning

confidence: 99%

“…etc. Separation of heavy metal(Chromium) from aqueous solution can be done by many treatment methods like chemical precipitation, ion exchange , electrodialysis, and adsorption etc [1,5]. Adsorption method is ecofriendly and economic of all these treatment methods.…”

Section: Introductionmentioning

confidence: 99%

Removal of Heavy Metal (Chromium) From Aqueous Solution using Acacia Arabica Wood (Black Babul)

Dhananjaneyulu*

2019

IJRTE

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Heavy metals become a serious problem to society in the view of water pollution. Polluted water causes many disorders in human beings, animals and plants also. The concentration of heavy metals increases mainly due to the activities like mining, agricultural activities and disposal of industrial waste products. Most of the activities releases heavy metals like Mercury (Hg), chromium(Cr), arsenic(Ar), thallium (Tl), nickel (Ni), lead (Pb), and cadmium (Cd). Separation of these heavy metals from water many treatment methods are available like chemical precipitation, ion exchange, membrane separation, electrodialysis, ultra-filtration, nano filtration, coagulation, flocculation, floatation and adsorption. Adsorption is the best method out of all these methods. Activate carbon is normally used as adsorbent but it is expensive. Black babul wood is the cheapest and abundant available in nature. So treatment of heavy metals black babul wood used as adsorbent. In this article, effect of parameters like process time, initial concentration, adsorbent dosage, adsorbent particle and temperature on separation of Chromium from aqueous solution is studied.

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Removal of Heavy Metals from Aqueous Solutions by Immobilized Bacteria using biochar and lignosulfonate into Chitosan: A Study on Cadmium and Lead

Farhadi,

Enayatizamir,

Moradi

et al. 2024

Preprint

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This study aimed to isolate cadmium (Cd) and lead (Pb) resistant bacteria from the soil around the steel industry and to remove both metals from aqueous solution by coupling the bacteria with modified chitosan. A combination of corn biochar, and lignosulfonate with chitosan was used to immobilize the bacteria. Six bacterial isolates were identified and half-maximal effective concentration (EC50) values for cadmium (Cd) and lead (Pb) were determined. FTIR analysis of Pb- and Cd- exposed bacteria revealed the functional groups involved in metal sorption. Immobilized bacteria in biochar-chitosan and lignosulfonate-chitosan beads could efficiently remove metals. The best fit of adsorption isotherms for Cd and Pb was obtained using the Freundlich isotherm model. The maximum adsorption capacity at an initial concentration of 200 mg L− 1 of Cd and Pb was 52.72 mg g− 1 and 58.68 mg g− 1, respectively, by immobilized bacteria using biochar in chitosan (CbB). The adsorption capacity of the beads for both metals increased with increasing contact time. The Intraparticle diffusion model indicated the best fit to explain the kinetic data for Pb and Cd. The maximum removal of Pb and Cd by CbB were 99.7% and 99.4%, respectively, after 240 min.

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Removal of Heavy Metals From Water by Wood-Based Lignocellulocis Materials

Cited by 3 publications

References 13 publications

Copper(II) ion removal by chemically and physically modified sawdust biochar

Copper(II) ion removal by chemically and physically modified sawdust biochar

Removal of Heavy Metal (Chromium) From Aqueous Solution using Acacia Arabica Wood (Black Babul)

Removal of Heavy Metals from Aqueous Solutions by Immobilized Bacteria using biochar and lignosulfonate into Chitosan: A Study on Cadmium and Lead

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