Preparation and characterization of rice husk activated carbon-supported zinc oxide nanocomposite (RHAC-ZnO-NC)

Dada, Adewumi O.; Inyinbor, Adejumoke Abosede; Tokula, Blessing E.; Bello, Olugbenga Solomon; Pal, Ujjwal

doi:10.1016/j.heliyon.2022.e10167

Cited by 21 publications

(6 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The bulk density was derived via the Archimedes principle. The reported procedure by Dada et al, [18] was followed by measuring accurately an empty cylinders weight and a cylinder containing 5 ml of the adsorbate. Equation 2 was applied for the bulk density determination.…”

Section: Bulk Densitymentioning

confidence: 99%

Sustainable Chitosan Supported Magnetite Nanocomposites for Sequestration of Rhodamine B Dye from the Environment

Dada,

Inyinbor,

Tokula

et al. 2024

IOP Conf. Ser.: Earth Environ. Sci.

View full text Add to dashboard Cite

This study investigated the sustainable chitosan supported magnetite nanocomposites (C-Fe3O4) for sequestration of Rhodamine B (RhB) Dye from environment. The synthesis of C-Fe3O4, its physicochemical characterization and synergistic influence of initial concentration of the dye and time of contact with the adsorbent during the sorption of Rhodamine B (RhB) on C-Fe3O4 were studied. The physicochemical properties indicated better equilibration via bulk density of 0.731 g/cm3, moisture content 7.2, point of zero charge (PZC) of 4 indicated suitability for RhB. Functional group of C-Fe3O4 determined by FTIR revealed characteristics peaks at 3433 cm−1 and 698 – 478 cm−1 confirming the successful formation by incorporation of chitosan and magnetite nanoparticles. Synergistic influence of the time of contact and initial concentration of Rb dye influenced the dye sorption. Effective adsorption of RhB onto C-Fe3O4 was studied using batch adsorption techniques at initial concentration (200 – 1000 ppm), contact time (10 – 120 min), stirring speed (120 rpm), temperature of 25 °C and adsorbent dosage of 100 mg. Rapid adsorption of RhB onto C-Fe3O4 was obtained at 10 min with 96.9% removal efficiency at highest RhB concentration of 1000 ppm. The study revealed the efficacy of contact time and initial dye concentration as imperative operational parameters majorly influencing sorption study.

show abstract

Section: Bulk Densitymentioning

confidence: 99%

Sustainable Chitosan Supported Magnetite Nanocomposites for Sequestration of Rhodamine B Dye from the Environment

Dada,

Inyinbor,

Tokula

et al. 2024

IOP Conf. Ser.: Earth Environ. Sci.

View full text Add to dashboard Cite

show abstract

“…These figures ranged from 576 to 1628.95 mg/g. However, it should be pointed out that in the study conducted by [24][25][26], waste materials were used as precursors for the carbon adsorbents. In the study by [24], rice husks were combined with a 1 M H 3 PO 4 solution and subsequently carbonised at 400 • C in a muffle furnace for 60 min.…”

Section: Adsorption Study Iodine Number/nomentioning

confidence: 99%

“…However, it should be pointed out that in the study conducted by [24][25][26], waste materials were used as precursors for the carbon adsorbents. In the study by [24], rice husks were combined with a 1 M H 3 PO 4 solution and subsequently carbonised at 400 • C in a muffle furnace for 60 min. The resultant activated carbon was further altered to create a ZnO-containing nanocomposite, and its iodine sorption capacity was measured at 660.4 mg/g.…”

Section: Adsorption Study Iodine Number/nomentioning

confidence: 99%

Adsorption of Nitrogen Dioxide on Nitrogen-Enriched Activated Carbons

Bazan-Wozniak,

Nosal-Wiercińska,

Cielecka-Piontek

et al. 2024

IJMS

View full text Add to dashboard Cite

The aim of this study was to obtain nitrogen-enriched activated carbons from orthocoking coal. The initial material was subjected to a demineralisation process. The demineralised precursor was pyrolysed at 500 °C and then activated with sodium hydroxide at 800 °C. Activated carbon adsorbents were subjected to the process of ammoxidation using a mixture of ammonia and air at two different temperature variants (300 and 350 °C). Nitrogen introduction was carried out on stages of demineralised precursor, pyrolysis product, and oxidising activator. The elemental composition, acid-base properties, and textural parameters of the obtained carbon adsorbents were determined. The activated carbons were investigated for their ability to remove nitrogen dioxide. The results demonstrated that the ammoxidation process incorporates new nitrogen-based functional groups into the activated carbon structure. Simultaneously, the ammoxidation process modified the acid-base characteristics of the surface and negatively affected the textural parameters of the resulting adsorbents. Furthermore, the study showed that all of the obtained carbon adsorbents exhibited a distinct microporous texture. Adsorption tests were carried out against NO2 and showed that the carbon adsorbents obtained were highly effective in removing this gaseous pollutant. The best sorption capacity towards NO2 was 23.5 mg/g under dry conditions and 75.0 mg/g under wet conditions.

show abstract

“…Despite its potential due to its high content of protein and fiber, its main application is currently limited to animal feed [12]. Rice husk (RH) is the most abundant residue resulting from the processing of rice and represents approximately 20% to 25% of the total weight of the rice grain [13]. It is a cellulose-based fiber that contains 20% silica in amorphous form.…”

Section: Introductionmentioning

confidence: 99%

Rice Husk, Brewer’s Spent Grain, and Vine Shoot Trimmings as Raw Materials for Sustainable Enzyme Production

Guimarães,

Mota,

Pereira

et al. 2024

Materials

View full text Add to dashboard Cite

Solid by-products with lignocellulosic structures are considered appropriate substrates for solid-state fermentation (SSF) to produce enzymes with diverse industrial applications. In this work, brewer’s spent grain (BSG), rice husk (RH), and vine shoot trimmings (VSTs) were employed as substrates in SSF with Aspergillus niger CECT 2088 to produce cellulases, xylanases, and amylases. The addition of 2% (NH4)2SO4 and 1% K2HPO4 to by-products had a positive effect on enzyme production. Substrate particle size influenced enzyme activity and the overall highest activities were achieved at the largest particle size (10 mm) of BSG and RH and a size of 4 mm for VSTs. Optimal substrate composition was predicted using a simplex centroid mixture design. The highest activities were obtained using 100% BSG for β-glucosidase (363 U/g) and endo-1,4-β-glucanase (189 U/g), 87% BSG and 13% RH for xylanase (627 U/g), and 72% BSG and 28% RH for amylase (263 U/g). Besides the optimal values found, mixtures of BSG with RH or VSTs proved to be alternative substrates to BSG alone. These findings demonstrate that SSF bioprocessing of BSG individually or in mixtures with RH and VSTs is an efficient and sustainable strategy to produce enzymes of significant industrial interest within the circular economy guidelines.

show abstract

Preparation and characterization of rice husk activated carbon-supported zinc oxide nanocomposite (RHAC-ZnO-NC)

Cited by 21 publications

References 36 publications

Sustainable Chitosan Supported Magnetite Nanocomposites for Sequestration of Rhodamine B Dye from the Environment

Sustainable Chitosan Supported Magnetite Nanocomposites for Sequestration of Rhodamine B Dye from the Environment

Adsorption of Nitrogen Dioxide on Nitrogen-Enriched Activated Carbons

Rice Husk, Brewer’s Spent Grain, and Vine Shoot Trimmings as Raw Materials for Sustainable Enzyme Production

Contact Info

Product

Resources

About