Adsorption mechanism of different dyes on chemical activated carbon as quantitative assessment for wastewater treatment: Comparative study between ZnCl2 and its eutectic

De Smedt, Jonas; Heynderickx, Philippe M.; Arauzo, Pablo J.; Ronsse, Frederik

doi:10.1016/j.seppur.2023.126002

Cited by 12 publications

(2 citation statements)

References 49 publications

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“…The precise location of the peaks for the micro- and mesoporosity distribution strongly depends on the applied calculation methods (e.g., kernel), which holds true even in this study, where the most novel approach was applied. In this regard, the use of complementary analytical methods such as small-angle X-ray scattering (SAXS), transmission electron microscopy (TEM), and absorption of specific molecules can be useful for the validation of the gas adsorption results. ,− Nonetheless, the parameters derived from micro- and meso PSD (e.g., V pore and SSA) can serve as indicators of the structural changes within the selected pore range. They are validated by theoretically embedded estimators (e.g., BET or Dubinin–Radushkevich calculation methods), so their use to describe changes should not be biased .…”

Section: Resultsmentioning

confidence: 99%

Part 1─Impact of Pyrolysis Temperature and Wood Particle Length on Vapor Cracking and Char Porous Texture in Relation to the Tailoring of Char Properties

Maziarka,

Kienzl,

Dieguez-Alonso

et al. 2024

Energy Fuels

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Pore size distribution is a key parameter in the performance of biobased pyrolytic char in novel applications. In industrial-scale production, the size of feedstock particles typically exceeds a few millimeters. For such particle sizes, it is a challenge to tailor the final properties of the char based only on the process conditions (experimental and modeling-wise). Pyrolysis studies of single particles larger than a few millimeters provide data sets useful for modeling and optimization of the process. Part 1 of this research focused on the pyrolysis of single particles of beech wood, secondary cracking, and its effect on the char porous texture. It contains a quantitative assessment of the effects of five conversion temperatures (from 300 to 840 °C) and two particle dimensions (Ø8 × 10 mm and Ø8 × 16 mm) on the composition of the pyrolysis vapors and pore morphology of the char. Results from real-time temperature and mass changes are presented along with release profiles of 15 vapor constituents measured by infrared spectroscopy. Furthermore, characterization of the collected bio-oil (using GC-MS/FID) and the textural hierarchical structured char (through N 2 and CO 2 adsorption, Hg porosimetry, and scanning electron microscopy (SEM)) was performed. Cracking of vapors above 500 °C was compound-specific. The polyaromatic hydrocarbons (PAHs) yield, between 680 and 840 °C, increased 5 times for 10 mm particles and 9 times for 16 mm ones. Besides temperature, PAH yield was suspected to correlate with particle length and PAHs/soot deposition in the micropores. Results showed that the macropores accounted for over 80% of the total pore volume, regardless of the temperature and particle length. Increasing the particle length by 60% caused a reduction in the specific surface area (ca. 15% at 840 °C) of the resulting char, mainly due to a reduction in microporosity. Based on the findings, the production conditions for a specific char application are suggested. The obtained data will be used in Part 2 of this research, devoted to subsequent CFD modeling of the process.

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Section: Resultsmentioning

confidence: 99%

Part 1─Impact of Pyrolysis Temperature and Wood Particle Length on Vapor Cracking and Char Porous Texture in Relation to the Tailoring of Char Properties

Maziarka,

Kienzl,

Dieguez-Alonso

et al. 2024

Energy Fuels

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“…Due to its simple design and low investment cost, because it is readily available, it avoids the additional chemicals, it does not lead to unwanted byproducts, and has been shown to have significant efficacious potential for treating and eliminating organic contaminants, this strategy is being strongly considered for wastewater treatment. Activated carbon is by far the most common material used in the processes [ 21 , 22 ], but many other adsorbents (derived from biomass [ 23 , 24 ], with magnetic properties [ 25 ], hybrid materials [ 26 ], composites [ 27 ], etc.) have been likewise prepared and researched to remove water pollutants.…”

Section: Introductionmentioning

confidence: 99%

Hydrogels Based on Chitosan and Nanoparticles and Their Suitability for Dyes Adsorption from Aqueous Media: Assessment of the Last-Decade Progresses

Grigoraș,

Simion,

Drob

2024

Gels

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Water is one of the fundamental resources for the existence of humans and the environment. Throughout time, due to urbanization, expanding population, increased agricultural production, and intense industrialization, significant pollution with persistent contaminants has been noted, placing the water quality in danger. As a consequence, different procedures and various technologies have been tested and used in order to ensure that water sources are safe for use. The adsorption process is often considered for wastewater treatment due to its straightforward design, low investment cost, availability, avoidance of additional chemicals, lack of undesirable byproducts, and demonstrated significant efficacious potential for treating and eliminating organic contaminants. To accomplish its application, the need to develop innovative materials has become an essential goal. In this context, an overview of recent advances in hydrogels based on chitosan and nanocomposites and their application for the depollution of wastewater contaminated with dyes is reported herein. The present review focuses on (i) the challenges raised by the synthesis process and characterization of the different hydrogels; (ii) the discussion of the impact of the main parameters affecting the adsorption process; (iii) the understanding of the adsorption isotherms, kinetics, and thermodynamic behavior; and (iv) the examination of the possibility of recycling and reusing the hydrogels.

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Classical and advanced isotherms to model the adsorption of drugs, dyes and metals on activated carbonaceous materials: a review

Mechnou,

Meskini,

Elqars

et al. 2024

Environ Chem Lett

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Adsorption mechanism of different dyes on chemical activated carbon as quantitative assessment for wastewater treatment: Comparative study between ZnCl2 and its eutectic

Cited by 12 publications

References 49 publications

Part 1─Impact of Pyrolysis Temperature and Wood Particle Length on Vapor Cracking and Char Porous Texture in Relation to the Tailoring of Char Properties

Part 1─Impact of Pyrolysis Temperature and Wood Particle Length on Vapor Cracking and Char Porous Texture in Relation to the Tailoring of Char Properties

Hydrogels Based on Chitosan and Nanoparticles and Their Suitability for Dyes Adsorption from Aqueous Media: Assessment of the Last-Decade Progresses

Classical and advanced isotherms to model the adsorption of drugs, dyes and metals on activated carbonaceous materials: a review

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