A comparative study of heavy metals removal using agricultural waste biosorbents

Tokay, Begüm; Akpınar, Işıl

doi:10.1016/j.biteb.2021.100719

Cited by 37 publications

(20 citation statements)

References 46 publications

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“…Figure 4 shows the pseudo-first-order kinetics modeling with all the four materials here under study for the metal sorption [28]. It is highlighted that AgNPs-coffee husk achieved better values of 1/q t (see corresponding equation from the Materials and Methods), where the order of best sorption was Pb > Cd > Cu > Cr, which is like those obtained for the other materials (mainly for AgNPs-coffee husk and AgNPs-lignin).…”

Section: Kinectic Modelingmentioning

confidence: 56%

“…Lignin provides structural rigidity to the cell walls of many plant species [27]. Lignin has been used as a potential adsorbent to remove heavy metals due to its unique polyphenolic structure and physicochemical properties [28].…”

Section: Coffee Husk Preparation and Lignin Obtentionmentioning

confidence: 99%

“…To optimize sorption conditions, and mainly the contact time, the corresponding experiments were carried out by using all biomass materials (the coffee husk and lignin, and modified ones both with AgNPs) [27][28][29]. A properly weighed amount of each biomass system (25 mg) with corresponding metal ions solutions (2.5 mL) was shaking both at different contact times (10,15,30,45, 60 min, and 2, 4, 12, and 24 h) [25].…”

Section: Sorption Experimentsmentioning

confidence: 99%

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Coffee Husk and Lignin Revalorization: Modification with Ag Nanoparticles for Heavy Metals Removal and Antifungal Assays

Guevara-Bernal

Ortíz

Cifuentes

et al. 2022

Water

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This study presents the use of the modified coffee husk and coffee lignin as sorbents in the heavy metal ions sorption of Pb(II), Cd(II), Cr(III), and Cu(II) in an aqueous solution. The modification of sorbents was carried out by the impregnation method, using silver nitrate (AgNO3) and sodium borohydride (NaBH4) as a nanoparticles’ (NPs) precursor, and reducing agent, respectively. The obtained nanocomposite material was morphologically characterized by electron microscopy. In addition, an evaluation of metal ions’ sorption, pseudo-first-order, and pseudo-second-order kinetics modeling was performed. Finally, antifungal activity was evaluated on different Candida species. Coffee and lignin modified with AgNPs increased the extraction capacity with the highest sorption for Pb ions with 2.56 mg/g and 1.44 mg/g, respectively.

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Section: Kinectic Modelingmentioning

confidence: 56%

Section: Coffee Husk Preparation and Lignin Obtentionmentioning

confidence: 99%

Section: Sorption Experimentsmentioning

confidence: 99%

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Coffee Husk and Lignin Revalorization: Modification with Ag Nanoparticles for Heavy Metals Removal and Antifungal Assays

Guevara-Bernal

Ortíz

Cifuentes

et al. 2022

Water

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“…The average values of the measurements and the aspect ratio between length and diameter can be seen in Table 6 , in which it can be seen that the chemical treatments carried out allowed the measurements of the biosorbents to be reduced [ 86 ], obtaining a larger surface area contact by the elimination of compounds such as hemicellulose and lignin [ 54 , 90 ]. In the case of the mixed T4 treatment, a greater loss of the original measurements was observed, due to the sequential combination of sulfuric acid and sodium hydroxide [ 91 , 92 , 93 ].…”

Section: Resultsmentioning

confidence: 99%

Modified Polymeric Biosorbents from Rumex acetosella for the Removal of Heavy Metals in Wastewater

et al. 2022

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The contamination of water resources by effluents from various industries often contains heavy metals, which cause irreversible damage to the environment and health. The objective was to evaluate different biosorbents from the weed Rumex acetosella to remove metal cations in wastewater. Drying, grinding and sieving of the stems was carried out to obtain the biomass, retaining the fractions of 250 to 500 µm and 500 to 750 µm, which served to obtain the biosorbents in natura (unmodified), acidic, alkaline, and mixed. Proximal analysis, PZC, TOC, removal capacity, influence of pH, functional groups, thermal analysis, structural characteristics, adsorption isotherms, and kinetic study were evaluated. The 250 µm mixed treatment was the one that presented the highest removal percentages, mainly due to the OH, NH, -C-H, COOH, and C-O functional groups achieving the removal of up to 96.14% of lead, 36.30% of zinc, 34.10% of cadmium and 32.50% of arsenic. For contact times of 120 min and an optimum pH of 5.0, a loss of cellulose mass of 59% at 328 °C and a change in the surface of the material were also observed, which allowed for obtaining a topography with greater chelating capacity, and the Langmuir and pseudo-second order models were better fitted to the adsorption data. The new biosorbents could be used in wastewater treatment economically and efficiently.

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“…Industries such as electroplating, mines, pharmaceuticals, paint and textile, are the major point source, producing effluents constitute heavy metals (Tchounwou et al 2012;Bazrafshan et al 2015) such as zinc, lead, copper, nickel and cadmium, regardless of the economic benefits that these industries offer to the communities. Hence, there is a requirement to explore eco-friendly (Tokay and Akpinar 2021), sustainable, cost effective and efficient adsorbents while eliminating pollution (Klučáková and Pavlíková 2017).…”

Section: Introductionmentioning

confidence: 99%

Heavy Metal Removal from Aqueous Solutions Using Fly-Ash Derived Zeolite NaP1

2022

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Fly-ash derived zeolites have recently -received great attention as cheaper adsorbents to remove heavy metals from water since they can be synthesized from a waste product. In this study, we evaluated the single- and multi-cation adsorption efficiencies of fly-ash derived NaP1 for the removal of zinc (Zn), copper (Cu) and lead (Pb). We also determined precipitation and leaching from NaP1 during the adsorption. Results showed that the uptake capacities for Zn (34 mg/g) and Pb (192 mg/g) were higher than other fly-ash derived NaP1 and adsorbents such as clinoptilolite and activated carbon. The Cu uptake was estimated ~ 14.6 mg/g. Pb2+ > Cu2+ > Zn2+ is the order for the metal cation selectivity of NaP1. Langmuir adsorption isotherm and pseudo-second order kinetic model fitted best for all elements. The metal uptake occurred in 15 min. Diffusion of hydrated metals through microporous channels is the rate-determining step.

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A comparative study of heavy metals removal using agricultural waste biosorbents

Cited by 37 publications

References 46 publications

Coffee Husk and Lignin Revalorization: Modification with Ag Nanoparticles for Heavy Metals Removal and Antifungal Assays

Coffee Husk and Lignin Revalorization: Modification with Ag Nanoparticles for Heavy Metals Removal and Antifungal Assays

Modified Polymeric Biosorbents from Rumex acetosella for the Removal of Heavy Metals in Wastewater

Heavy Metal Removal from Aqueous Solutions Using Fly-Ash Derived Zeolite NaP1

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