Facile route for synthesis of Fe0/Fe3C/γ-Fe2O3 carbon composite using hydrothermal carbonization of sugarcane bagasse and its use as effective adsorbent for sulfamethoxazole removal

Chemosphere ◽  
2021 ◽  
pp. 133214
Author(s):  
G. Prasannamedha ◽  
P. Senthil Kumar ◽  
Vignesh Shankar
Keyword(s):  
Sugarcane Bagasse ◽  
Hydrothermal Carbonization ◽  
Carbon Composite ◽  
Facile Route

scholarly journals Development and Characterization of Composite Carbon Adsorbents with Photocatalytic Regeneration Ability: Application to Diclofenac Removal from Water

Catalysts ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 173
Author(s):  
Velma Beri Kimbi Yaah ◽  
Satu Ojala ◽  
Hamza Khallok ◽  
Tiina Laitinen ◽  
Marcin Selent ◽  
...  
Keyword(s):  
Specific Surface ◽  
Surface Area ◽  
Functional Groups ◽  
Specific Surface Area ◽  
Palm Kernel ◽  
Hydrothermal Carbonization ◽  
Carbon Composite ◽  
Carbon Adsorbents ◽  
Regeneration Ability ◽  
Activation Temperature

This paper presents results related to the development of a carbon composite intended for water purification. The aim was to develop an adsorbent that could be regenerated using light leading to complete degradation of pollutants and avoiding the secondary pollution caused by regeneration. The composites were prepared by hydrothermal carbonization of palm kernel shells, TiO2, and W followed by activation at 400 °C under N2 flow. To evaluate the regeneration using light, photocatalytic experiments were carried out under UV-A, UV-B, and visible lights. The materials were thoroughly characterized, and their performance was evaluated for diclofenac removal. A maximum of 74% removal was observed with the composite containing TiO2, carbon, and W (HCP25W) under UV-B irradiation and non-adjusted pH (~5). Almost similar results were observed for the material that did not contain tungsten. The best results using visible light were achieved with HCP25W providing 24% removal of diclofenac, demonstrating the effect of W in the composite. Both the composites had significant amounts of oxygen-containing functional groups. The specific surface area of HCP25W was about 3 m2g−1, while for HCP25, it was 160 m2g−1. Increasing the specific surface area using a higher activation temperature (600 °C) adversely affected diclofenac removal due to the loss of the surface functional groups. Regeneration of the composite under UV-B light led to a complete recovery of the adsorption capacity. These results show that TiO2- and W-containing carbon composites are interesting materials for water treatment and they could be regenerated using photocatalysis.

Effect of Mixing of Carbon Support from Sawdust and Sugarcane Bagasse by Hydrothermal Carbonization for Synthesis of Molybdenum Disulfide (MoS2) Catalyst

2018 ◽  
Vol 940 ◽  
pp. 35-39
Author(s):  
Peerawith Sumtong ◽  
Vituruch Goodwin ◽  
Nuwong Chollacoop ◽  
Apiluck Eiad-Ua
Keyword(s):  
Molybdenum Disulfide ◽  
Sugarcane Bagasse ◽  
Functional Group ◽  
Carbon Support ◽  
Hydrothermal Carbonization ◽  
Ammonium Molybdate ◽  
Optimum Ratio ◽  
Calcination Process ◽  
Ammonium Molybdate Tetrahydrate ◽  
Scanning Electron

Molybdenum disulfide (MoS2) catalyst on carbon support from varying ratio of sawdust and sugarcane bagasse has been successfully synthesized by hydrothermal carbonization and calcination process. Hydrothermal carbonization of lignocellulosic structure into carbon support is investigated at 200 oC for 24 hr and calcination at 600 °C for 2 hr. The precursor of MoS2 catalyst is prepared using thiourea (CH4N2S) and ammonium molybdate tetrahydrate ((NH4)6Mo7O24 . 4H2O) loaded on carbon support. The lignocellulosic structure as hemicellulose and cellulose is changed at high temperature via hydrothermal carbonization and calcination. The distribution of molybdenum disulfide on carbon support is varied based on morphology and functional group of carbon support. The morphology and functional group were analyzed using Scanning Electron Microscope (SEM) and Fourier Transform Infrared Spectroscopy (FTIR). It shows that carbon support at equal ratio (1:1) of sawdust and sugarcane bagasse is an optimum ratio with high distribution of molybdenum disulfide catalyst on carbon support.

scholarly journals Hydrothermal Carbonization of Waste Sugarcane Bagasse for the Effective Removal of Emerging Contaminants from Aqueous Solution

2022 ◽  
Vol 2022 ◽  
pp. 1-13
Author(s):  
G. Prasannamedha ◽  
P. Senthil Kumar
Keyword(s):  
Thermal Degradation ◽  
Sugarcane Bagasse ◽  
Porous Carbon ◽  
Emerging Contaminants ◽  
Thermal Exposure ◽  
Hydrothermal Carbonization ◽  
Maximum Adsorption Capacity ◽  
Active Surface Area ◽  
Hydroxyl Groups ◽  
Structural Morphology

Porous carbon spheres were fabricated from sugarcane bagasse using a sustainable hydrothermal carbonization process followed by alkali impregnation inert atmosphere activation. Developed spheres were technically analysed for their chemical science, structural morphology, texture, porosity with respect to size distribution, and thermal degradation. Spheres are functionally enriched with oxygenated groups showing amorphous nature portraying as a smooth surface. After activation, intensity of functional groups is reduced due to reduction reaction by KOH thereby yielding highly rich porous carbon. The active surface area developed on spheres is 111 m2 g-1 holding pores that are mesoporous in nature. Resistance to thermal exposure using TGA showed that decomposition of hemicelluloses followed by cellulose yielded aromatized carbon-rich skeleton through thermal degradation of carboxyl and hydroxyl groups. Developed carbon was found to be effective in removing Ciprofloxacin Hydrochloride from water with maximum adsorption capacity of 110.008 mg g-1. Mechanistic removal followed pseudo-second-order kinetics along with Freundlich mode of adsorption. The presence of carboxylic and hydroxyl groups in porous carbon favoured elimination of CPF from water. The development of HTC-derived carbon helped conserving the energy thereby reducing the cost requirement.

scholarly journals Efficient toluene adsorption/desorption on biochar derived from in situ acid-treated sugarcane bagasse

2021 ◽  
Author(s):  
Yuan Qu ◽  
Li Xu ◽  
Yi Chen ◽  
Shikuan Sun ◽  
Yu Wang ◽  
...  
Keyword(s):  
Sugarcane Bagasse ◽  
High Performance ◽  
Gas Adsorption ◽  
Activated Carbons ◽  
Hydrothermal Carbonization ◽  
Modified Biochar ◽  
Micropore Surface Area ◽  
Practical Engineering ◽  
Adsorption Desorption

Abstract Carbon-based materials with great adsorption performance are of importance to meet the needs of industrial gas adsorption. Being massive agricultural wastes of sugarcane bagasse, China could use this waste into wealth. However, the comprehensive utilization of sugarcane bagasse as precursors for biochar that can be used as adsorbent has not been extensively explored. In this study, a series of in-situ sulfuric acid modified biochar were prepared by hydrothermal carbonization process. The prepared biochar (SBAC-7) is combined of two main advantages that are high microporosity (micropore surface area = 1106 m 2 /g) and rich in S-containing functional groups on the surface. In particular, SBAC-7 showed an excellent adsorption capacity of toluene (771.1 mg/g) at 30 o C, which is nearly 3 times as high as the commercial activated carbons. Meanwhile, it showed great stability and cyclic regeneration performance with five toluene adsorption-desorption test cycles. This study provides a high-performance biochar for adsorption-desorption cycle in practical engineering applications, and would contribute to the sustainable “sugarcane production - bagasse utilization” circular economy.

scholarly journals Sugarcane Bagasse-derived Hydrochar: Modification with Cations to Enhance Phosphate Removal

2021 ◽  
Vol 19 (5) ◽  
pp. 1-10
Author(s):  
Usarat Thawornchaisit ◽  
◽  
Tanrawee Onlamai ◽  
Nontakorn Phurkphong ◽  
Rawiwan Sukharom ◽  
...  
Keyword(s):  
Functional Groups ◽  
Sugarcane Bagasse ◽  
Phosphate Uptake ◽  
Hydrothermal Carbonization ◽  
Phosphate Removal ◽  
Uptake Capacity ◽  
Chemically Modified ◽  
Oxygen Functional Groups ◽  
Fe Content ◽  
Co Precipitation

Cation modified hydrochars were synthesized by hydrothermal carbonization (HTC) of sugarcane bagasse, followed by impregnation of three different cations (Ca, Mg, and Fe) or co-precipitation of Fe3+ and Fe2+. HTC enhanced the hydrochar surface area and increased the enrichment of oxygen functional groups on the hydrochar surface confirmed by FTIR. The oxygen functional groups further improve the adsorption capacity for cations during hydrochar chemical modification. Physical appearance, FTIR and XRF confirmed that Ca2+, Mg2+ and Fe2+ or Fe3+ were well retained in the bagasse-derived hydrochar. The pHpzc values of all chemically modified hydrochars were greater than the unmodified hydrochar or bagasse alone. Modification with different cations improved phosphate uptake capacity. The Fe-modified hydrochar with about 45-50% Fe content showed greater phosphate removal efficiency than Ca- and Mg-modified hydrochars. In addition, hydrochars decorated by impregnation of Fe3+ demonstrated better phosphate removal than ones produced by co-precipitation of Fe3+ and Fe2+. Thus, chemically modified hydrochars could be used as an environmentally alternative adsorbent for phosphate removal from aqueous solutions.

Enhanced adsorptive removal of sulfamethoxazole from water using biochar derived from hydrothermal carbonization of sugarcane bagasse

2021 ◽  
Vol 407 ◽  
pp. 124825
Author(s):  
G. Prasannamedha ◽  
P. Senthil Kumar ◽  
R. Mehala ◽  
T.J. Sharumitha ◽  
D. Surendhar
Keyword(s):  
Sugarcane Bagasse ◽  
Hydrothermal Carbonization ◽  
Adsorptive Removal
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