Valorization of peach stones to high efficient activated carbon: Synthesis, characterization, and application for Cr(VI) removal from aqueous medium

Khemmari, Fariza; Benrachedi, K.

doi:10.1080/15567036.2019.1598519

Cited by 9 publications

(1 citation statement)

References 24 publications

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“…From the relative intensities of the different bands, several compositional differences can be established as follows: walnut shell is characterized by a lower content of ester groups (bands at 1742 and 1744 cm −1 ) [ 64 , 65 , 66 , 67 , 68 ]; the amount of oxidized aliphatic groups (such as acids, ketones, aldehydes) is higher in walnut shells (considering the bands at 1618 and 1659 cm −1 ) [ 67 , 69 ]; there are fewer aromatic groups in walnut shells (bands at 1508 and 1510 cm −1 ) [ 67 , 68 , 69 ], as compared to kernel samples. On the other hand, there are similarities between the spectra of the analyzed kernels samples.…”

Section: Resultsmentioning

confidence: 99%

Green Synthesis of Advanced Carbon Materials Used as Precursors for Adsorbents Applied in Wastewater Treatment

et al. 2023

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Huge amounts of vegetable waste, mainly resulting from the food industry, need large areas for storage, as they could cause hazardous environmental impact, leading to soil and water pollution or to CO2 emissions during accidental incineration. This work was aimed at recycling certain lignocellulosic waste (walnut shells, kernels of peach, apricot, and olive) to design advanced carbon material precursors (ACMP) to be used for obtaining nano-powders with high applicative potential in pollution abatement. Both waste and ACMP were characterized using proximate and elemental analysis, and by optical microscopy. Complex characterization of raw materials by FTIR, TGA-DTG, and SEM analysis were carried out. The ACMP were synthetized at 600–700 °C by innovative microwave heating technology which offers the advantages of lower energy consumption using 3.3 kW equipment at laboratory level. The ACMP ash < 3% and increased carbon content of 87% enabled the development of an extended pore network depending on degassing conditions during heating. TEM analysis revealed a well-developed porous structure of the synthesized ACMP carbonaceous materials. Due to the presence of oxygen functional groups, ACMPs exhibit adsorption properties highlighted by an iodine index of max. 500 mg/g and surface area BET of 300 m2/g, which make them attractive for removal of environmental pollutants such as dyes having molecule sizes below 2 nm and ions with pore dimensions below 1 nm, widely used industrially and found in underground waters (NO3−) or waste waters (SO4−2).

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