A sustainable, low-cost carbonaceous hydrochar adsorbent for methylene blue adsorption derived from corncobs

Tran, Thi Hien; Le, Anh Hoang; Pham, Thien Huu; Duong, La Duc; Nguyen, Xuan Cuong; Nadda, Ashok Kumar; Chang, Soon Woong; Nguyen, Dinh Duc; Nguyen, Dinh Thanh

doi:10.1016/j.envres.2022.113178

Cited by 25 publications

(6 citation statements)

References 41 publications

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“…Therefore, it can be concluded that the pulverization process with a ball mill did not cause a change in the type of functional groups but increased the number of functional groups available on the activated carbon surface. Apart from these two wavelengths, the peak also occurs at a wavelength of 460.99; 796.60; 1091.71 cm −1 , which probably indicates the presence of functional groups of C-O and C-C, C-H, and C-O-C, which are commonly found in ether, ester or phenol groups [20,28].…”

Section: ■ Results and Discussionmentioning

confidence: 95%

Effect of Activated Carbon Particle Size on Methylene Blue Adsorption Process in Textile Wastewater

2023

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Up to 60–70% of the total textile dyes produced are azo dyes. An example of azo dye is methylene blue, which is commonly used in dyeing wool, silk, and cotton. This substance possessed harmful effects on the environment. Therefore, the removal process is mandatory. The adsorption process is a common method for dye removal in wastewater. One innovation to increase adsorption efficiency even further is by reducing adsorbent particle size. To understand the effect of adsorbent particle size on the adsorption process, in this study, granular activated carbon (GAC) was pulverized into powder (PAC) and superfine powder (SPAC). Adsorbent characterizations, isotherm, kinetics, and thermodynamics tests were conducted. Based on this study, surface area, pore volume, and adsorption capacity were increased for smaller adsorbent particle sizes. Isotherm and kinetic analysis showed that there was no difference in the isotherm and kinetic models that applied to each activated carbon, but there was an increase in the isotherm and kinetic coefficient values at smaller particle sizes. Meanwhile, based on the thermodynamic test, there were differences in the dominant adsorption mechanism for each activated carbon. In GAC and SPAC, the dominant adsorption mechanism was electrostatic interactions, while in PAC was van der Waals forces.

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Section: ■ Results and Discussionmentioning

confidence: 95%

Effect of Activated Carbon Particle Size on Methylene Blue Adsorption Process in Textile Wastewater

2023

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“…Biochar activated-P. juliflora pods 54.73 [114] Biochar activated-Coriandrum sativum 94.90 [59] Biochar activated mesoporous via microwave process 186.40 [112] Biochar activated-Pterospermum acerifolium 166.65 [84] Biochar activated-Eucalyptus 49.61 [115] Biochar activated-Cassava (Manihot esculenta Crantz) 194.58 [116] Biochar activated-Arjun Bark Powder 68.30 [117] Biochar activated-pine needles 277.78 [118] Biochar activated-Juglans regia 102.28 [119] Biochar activated-sugar cane bagasse 163.93 [120] LAB…”

Section: Adsorbentmentioning

confidence: 99%

Biochar Derived from Water Hyacinth Biomass Chemically Activated for Dye Removal in Aqueous Solution

Carneiro,

Morais,

de Carvalho Melo

et al. 2023

Sustainability

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Rapid industrial development has led to the use of numerous dyes responsible for significant water pollution worldwide. Adsorbents have been developed to treat these waters, mainly in the form of activated biochar, which has several advantages, one of which is its good surface characteristics, such as high surface area and pore volume. The objective of the investigation was to analyze the efficiency of removing the methylene blue model dye in aqueous solutions through the adsorption process using biochar chemically activated from the leaf and stem of water hyacinth (Eichhornio crassipes) as a bioadsorbent. This study carbonized the stem and leaf containing zinc chloride at 600 °C. The materials were characterized by different techniques and were tested for their ability to adsorb methylene blue. The activated stem and leaf biochars removed approximately 285.71 and 322.58 mg g−1 of the dye, respectively, indicating that the adsorption is more significant in the leaf. Pseudo-second-order kinetics was the most suitable model to describe dye adsorption on biochars, and the experimental isotherm data fit the Langmuir model. It is concluded that the application of activated water hyacinth biochar is a renewable resource with the potential for effluent treatment.

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“…The resulting hydrochar can further undergo pelletizing to produce fuel pellets, which can be either used for domestic heating or for co-firing power plants. Aside from the fuel applications, hydrochar can also be activated by either chemical or physical methods to prepare an adsorbent to remove contaminants from wastewater such as heavy metals [13] and dyes [14] and for CO 2 capture [15]. To date, some previous literature has reviewed the use of hydrochar for improving plant growth [16], facilitating biomethane production in anaerobic digestion (AD) [17], heavy metal removal [18], gas cleanup [18], and as a soil amendment [19].…”

Section: Of 18mentioning

confidence: 99%

A Mini-Review: Biowaste-Derived Fuel Pellet by Hydrothermal Carbonization Followed by Pelletizing

Gallant

Farooque

et al. 2022

Sustainability

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This review article focuses on recent studies using hydrothermal carbonization (HTC) for producing hydrochar and its potential application as a solid fuel pellet. Due to the depletion of fossil fuels and increasing greenhouse gas (GHG) emissions, the need for carbon-neutral fuel sources has increased. Another environmental concern relates to the massive amount of industrial processing and municipal solid waste, which are often underutilized and end up in landfills to cause further environmental damage. HTC is an appealing approach to valorizing wet biomass into valuable bioproducts (e.g., hydrochar), with improved properties. In this review, the effects of the main HTC reaction parameters, including reaction temperature, residence time, and feedstock to water ratio on the properties and yield of hydrochar are described. Following this, the pelletizing of hydrochar to prepare fuel pellets is discussed by reviewing the influences of applied pressure, processing time, pellet aspect ratio, moisture content of the hydrochar, and the type and dosage of binder on the quality of the resulting fuel pellet. Overall, this review can provide research updates and useful insights regarding the preparation of biowaste-derived solid fuel pellets.

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A sustainable, low-cost carbonaceous hydrochar adsorbent for methylene blue adsorption derived from corncobs

Cited by 25 publications

References 41 publications

Effect of Activated Carbon Particle Size on Methylene Blue Adsorption Process in Textile Wastewater

Effect of Activated Carbon Particle Size on Methylene Blue Adsorption Process in Textile Wastewater

Biochar Derived from Water Hyacinth Biomass Chemically Activated for Dye Removal in Aqueous Solution

A Mini-Review: Biowaste-Derived Fuel Pellet by Hydrothermal Carbonization Followed by Pelletizing

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