Determination of the adsorption capacity of activated carbon made from coffee grounds by chemical activation with ZnCl and HPO

Namane, Abdelkader; Mekarzia, A.; Benrachedi, K.; Belhaneche‐Bensemra, Naïma; Hellal, Amina

doi:10.1016/j.jhazmat.2004.12.006

Cited by 207 publications

(102 citation statements)

References 20 publications

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“…Furthermore, SCGs have a higher calorific value than many organic wastes [15]. On average, SCGs contain up to 20% of lipids [16] and lignocellulosic material, which can be used for bioenergy [17][18][19] along with various applications such as absorbents [20], activated carbon [21][22][23] support for catalyst [24], catalyst source of antioxidants [25][26], biodiesel [13][14] or biofuel pellets [15]. The production of biodiesel is an especially attractive prospect given the urgent need to decarbonise liquid fuels and the limited viable sources of low carbon liquid fuel.…”

Section: Introductionmentioning

confidence: 99%

Kinetics of extraction and in situ transesterification of oils from spent coffee grounds

Najdanovic‐Visak

Lee

Tavares

et al. 2017

Journal of Environmental Chemical Engineering

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Resource limits, environmental concerns and unstable petroleum costs have led to an increased effort to develop alternative liquid fuels. Purpose grown feedstocks are expensive and demand additional resources such as land and water. Spent coffee grounds (SCGs) are a good potential low-cost feedstock, however, processing times and costs must be lowered in order to be cost competitive with fossil fuels.In this work, we investigated the kinetics of oil extraction from SCGs to explore if current methods of oil extraction could be hastened and an integrated process which couples oil extraction and conversion to biodiesel stages in one single step (in situ transesterification) which could significantly cut down biodiesel production costs.Kinetics of oil extraction from SCGs using n-hexane as solvent was studied as a function of temperature, solvent to solid ratio and water content. We have found that oil extraction times could be significantly reduced to 10 minutes due to high diffusion coefficients. Further, we demonstrate, for the first time, the successful in situ transesterification of SCGs using different concentration of sodium hydroxide as catalyst and methanol to oil mole ratio, promising lower biodiesel production costs from a ubiquitous waste product around the world.

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Section: Introductionmentioning

confidence: 99%

Kinetics of extraction and in situ transesterification of oils from spent coffee grounds

Najdanovic‐Visak

Lee

Tavares

et al. 2017

Journal of Environmental Chemical Engineering

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“…According to the results, the BY2 and BG4 dyes adsorption quantity increased with the S BET and S ex of ACss other than K 2 CO 3 -1.00-800 (Table II), because the developed mesopores' structure is connected to the micropore channel, which is favorable for the adsorption result of ACs [70]. However, the K 2 CO 3 -1.00-800 had high S BET 1537 m 2 /g and S ex 1162 m 2 /g, but less micropores (V mi 0.16 cm 3 /g, V mi /V tot 18.6%, Table II), meaning it is disadvantage to adsorbing micro-molecular adsorbate [21], [23], [37], [49], [71]- [75].…”

Section: E Dye Adsorption Isothermal Equilibrium Of Acsmentioning

confidence: 99%

“…About 128 MT of residual dyes are discharged globally into the environment per day, which pollutes water [20], may be directly poisonous and carcinogenic to the human body through the food chain, is hazardous to aquatic life [21]- [24], influences the light penetration ability of water, and degrades the self-purification capacity of rivers [25]. According to the Ecological and Toxicological Association of the Dyestuffs Manufacturing Industry investigation of 4,000 kinds of dyes on the market, the half lethal dose value of over 90% of them is 2×10 3 mg/kg, where basic dyes and diazo direct dyes have the highest toxicity [26], [27].…”

Section: Introductionmentioning

confidence: 99%

Adsorption for Dyes on Activation Carbons from Japanese Cedar Wood Prepared by Precarbonization and Two-stage Composite Activations with Wood Ash and Steam

ChiaWen¹,

Lin²

2017

IJCEA

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“…In order to analyse the controlling mechanisms in the present biosorption system, the pseudo-first and pseudo-second order kinetic models (Equations 3 and 4) were examined by fitting the experimental values the condition of 0 < R L < 1, in case of both Pb (II) and Cd (II), thereby indicating that the sorption is favourable (Namane, Mekarzia, Benrachedi, Belhanechebensemra, & Hellal, 2005). A comparison of biosorption capacities (Q m ) of various adsorbents in uptake of Pb (II) and Cd (II) is summarized in Table 4.…”

Section: Adsorption Kineticsmentioning

confidence: 99%

Valorization ofAdenanthera pavoninaseeds as a potential biosorbent for lead and cadmium removal from single and binary contaminated system

Sen

Goswami

Devi

et al. 2018

Geology, Ecology, and Landscapes

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This study investigated the biosorption of Pb (II) and Cd (II) on powdered seeds of Adenanthera pavonina from single and binary heavy metal solutions. The adsorption capacity of the metal ions was studied as a function of pH, adsorbent dose, initial metal ion concentration, and contact time. In the single heavy metal system, maximum removal of Pb (II) and Cd (II) were achieved at pH 4 and 6, respectively, while the equilibrium was attained at a contact duration of 35 min at a constant dose of 5 g L −1 was maintained for both Pb (II) and Cd (II). Further, the kinetic study revealed that the biosorption process was best described by the second-order kinetic model. In the competitive biosorption of binary mixtures of Pb (II) and Cd (II) were studied in terms of percentage removal of metal ions, adsorption capacity and equilibrium sorption isotherm. The percentage removal of metal ions in binary solutions was suppressed in presence of the other competitive metal ion. Field emission scanning electron microscopy integrated with energy dispersive X-ray spectroscopy of the biomass before (control) and after (metal loaded biomass) the biosoption process, confirmed the presence of respective heavy metal on to the biomass. Fourier transmission infrared spectroscopy spectra supported the activity of hydroxyl, amines, amides, and carboxyl groups in uptake of both heavy metal ions.

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Determination of the adsorption capacity of activated carbon made from coffee grounds by chemical activation with ZnCl and HPO

Cited by 207 publications

References 20 publications

Kinetics of extraction and in situ transesterification of oils from spent coffee grounds

Kinetics of extraction and in situ transesterification of oils from spent coffee grounds

Adsorption for Dyes on Activation Carbons from Japanese Cedar Wood Prepared by Precarbonization and Two-stage Composite Activations with Wood Ash and Steam

Valorization ofAdenanthera pavoninaseeds as a potential biosorbent for lead and cadmium removal from single and binary contaminated system

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