Stem powder and its active carbon of <i>Arachis hypogaea</i> plant for lead (II) removal: application to treat battery-based industrial effluents

Tungala, Leela Srinivas; Suneetha, M.; Pala, Sneha Latha; Biftu, Wondwosen Kebede; Ravindhranath, K.

doi:10.1080/15226514.2022.2095975

Cited by 2 publications

(2 citation statements)

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“…Biochar provides an increase in surface area and hence more active sites for the attachment of these metal ions (Figure S3). These findings are in line with Tong et al and Tungala et al…”

Section: Resultssupporting

confidence: 92%

“…Biochar provides an increase in surface area and hence more active sites for the attachment of these metal ions (Figure S3). These findings are in line with Tong et al 40 and Tungala et al 41 Contact Time. Contact time has been found to increase the ratio of metal adsorption for both metal ions on biochar and native A. hypogaea.…”

Section: Concentration Of Sorbatesupporting

confidence: 91%

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Biosorption Potential of Arachis hypogaea-Derived Biochar for Cd and Ni, as Evidenced through Kinetic, Isothermal, and Thermodynamics Modeling

Batool,

Qadir,

Adeeb

et al. 2023

ACS Omega

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Biochar derived from plant biomass has great potential for the decontamination of aqueous media. It is the need of the hour to test biochar derived from economical, easily available, and novel materials. In this regard, the present study provides insight into the sorption of two heavy metals, i.e., cadmium (Cd) and nickel (Ni), using native Arachis hypogaea and its biochar prepared through pyrolysis. The effect of different factors, including interaction time, initial concentration of adsorbate, and temperature, as well as sorbent dosage, was studied on the sorption of Cd and Ni through a batch experiment. Characterization of the native biowaste and prepared biochar for its surface morphology and functional group identification was executed using Fourier transform infrared (FTIR) spectroscopy and scanning electron microscopy (SEM). Results revealed the presence of different functional groups such as −OH on the surface of the adsorbent, which plays an important role in metal attachment. SEM reveals the irregular surface morphology of the adsorbent, which makes it easy for metal attachment. Thermogravimetric analysis shows the stability of A. hypogaea biochar up to 380 °C as compared with native adsorbent. The adsorption efficacy of A. hypogaea was found to be higher than that of native A. hypogaea for both metals. The best adsorption of Cd (94.5%) on biochar was observed at a concentration of 40 ppm, an adsorbent dosage of 2 g, a contact time of 100 min, and a temperature of 50 °C. While the optimum conditions for adsorption of Ni on biochar (97.2% adsorption) were reported at a contact time of 100 min, adsorbent dosage of 2.5 g, initial concentration of 60 ppm, and temperature of 50 °C. Results revealed that biochar offers better adsorption of metal ions as compared with raw samples at low concentrations. Isothermal studies show the adsorption mechanism as physical adsorption, and the negative value of Gibb's free energy confirms the spontaneous nature of the adsorption reaction. An increase in entropy value favors the adsorption process. Results revealed that the sorbent was a decent alternative to eliminate metal ions from the solution instead of costly adsorbents.

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“…Biochar provides an increase in surface area and hence more active sites for the attachment of these metal ions (Figure S3). These findings are in line with Tong et al and Tungala et al…”

Section: Resultssupporting

confidence: 92%

Section: Concentration Of Sorbatesupporting

confidence: 91%