scholarly journals Production of modified sunflowers seed shells for the removal of bisphenol A

RSC Advances ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 3516-3533
Author(s):  
Bahdja Hayoun ◽  
Saliha Bourouina-Bacha ◽  
Marta Pazos ◽  
Ma Angeles Sanromán ◽  
Hayette Benkhennouche-Bouchene ◽  
...  
Keyword(s):  
Bisphenol A ◽  
Lignocellulosic Biomass ◽  
Sunflower Seed ◽  
Sunflower Seed Shells

In this present study, an abundant, available lignocellulosic biomass, sunflower seed shells, SSS, was used as a precursor to prepare an effective eco-adsorbent by treatment with H2SO4 (AC75).

scholarly journals Pyrolytic biochars from sunflower seed shells, peanut shells and Spirulina algae: their potential as soil amendment and natural growth regulators

2020 ◽  
Vol 2 (11) ◽  
Author(s):  
Mariana P. Silva ◽  
María L. Nieva Lobos ◽  
Roxana V. Piloni ◽  
Diego Dusso ◽  
María E. González Quijón ◽  
...  
Keyword(s):  
Growth Regulators ◽  
Soil Amendment ◽  
Sunflower Seed ◽  
Natural Growth ◽  
Peanut Shells ◽  
Sunflower Seed Shells

Ultrafast preparation of saccharide-derived carbon microspheres with excellent dispersibility via ammonium persulfate-assisted hydrothermal carbonization

2019 ◽  
Vol 7 (32) ◽  
pp. 18840-18845 ◽  
Author(s):  
Pei Liu ◽  
Weiquan Cai ◽  
Jiahao Wei ◽  
Zhijun Cai ◽  
Mengyuan Zhu ◽  
...  
Keyword(s):  
Sunflower Seed ◽  
Hydrothermal Carbonization ◽  
Ammonium Persulfate ◽  
Carbon Microspheres ◽  
Sunflower Seed Shells

An ammonium persulfate-assisted hydrothermal strategy was successfully used to prepare carbon microspheres with excellent dispersibility from sucrose rapidly. The method can also be extended to glucose, starch and sunflower seed shells.

scholarly journals Equilibrium, kinetic, and thermodynamic studies of Basic Blue 9 dye sorption on agro-industrial lignocellulosic materials

2012 ◽  
Vol 10 (6) ◽  
pp. 1913-1926 ◽  
Author(s):  
Daniela Suteu ◽  
Carmen Zaharia ◽  
Teodor Malutan
Keyword(s):  
Sunflower Seed ◽  
Dye Removal ◽  
Intraparticle Diffusion ◽  
Industrial Wastes ◽  
Isotherm Models ◽  
Cationic Dye ◽  
Corn Cob ◽  
Good Efficiency ◽  
Maximum Sorption Capacity ◽  
Sunflower Seed Shells

AbstractThe sorptive potential of some lignocellulosic agro-industrial wastes (sunflower seed shells and corn cob) for Basic Blue 9 cationic dye removal from aqueous solutions was examined using the batch technique. The Freundlich, Langmuir, and Dubinin-Radushkevich isotherm models were used in order to determine the quantitative parameters of sorption. The Langmuir isotherm model indicated a maximum sorption capacity for these materials in the range of 40–50 mg dye per g (25°C), slightly higher for corn cob than for sunflower seed shells. The values of the thermodynamic parameters showed that the retention of cationic dye is a spontaneous and endothermic process. The application of pseudo-first order and pseudo-second order intraparticle diffusion models, and a Boyd — Reichenberg model for kinetic data interpretation suggested that sorption of Basic Blue 9 dye onto the studied materials is a process where both surface sorption and intraparticle diffusion contributed to the rate-limiting step. These lignocellulosic wastes can be used with good efficiency for dye removal from aqueous effluents.

scholarly journals Equilibrium Study, Modeling and Optimization of Model Drug Adsorption Process by Sunflower Seed Shells

2020 ◽  
Vol 10 (9) ◽  
pp. 3271 ◽  
Author(s):  
Bahdja Hayoun ◽  
Mustapha Bourouina ◽  
Marta Pazos ◽  
Mª Angeles Sanromán ◽  
Saliha Bourouina-Bacha
Keyword(s):  
Adsorption Capacity ◽  
Sunflower Seed ◽  
Low Cost ◽  
Equilibrium Study ◽  
Methylthioninium Chloride ◽  
Pseudo Second Order ◽  
Model Drug ◽  
Sunflower Seed Shells ◽  
Liquid Displacement ◽  
Influential Parameters

The adsorption capacity of the medication methylthioninium chloride (MC) from aqueous solution onto sunflower seed shells (SSS), a low cost and abundant alternative adsorbent, was investigated in a batch system. The surface properties of the adsorbent were characterized by Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), specific surface area (by using the Brunauer–Emmett–Teller equation), the liquid displacement method and pHPZC. The ability of SSS to remove the medication was assessed through kinetic, thermodynamic and equilibrium investigations. The adsorption efficiency of the SSS adsorbent for the removal of MC was evaluated considering the effects of its concentration, temperature, adsorption contact time, and the pH of the medium. The results obtained from the kinetic and isotherm studies show that the adsorption of the MC on SSS follows pseudo-second-order kinetics (R² > 0.99) and the Temkin isotherm model (R² = 0.97), respectively. The thermodynamic study showed that the adsorption was endothermic and spontaneous, according to its physisorption mechanism. The mathematical modeling of this process was carried out by using the surface response methodology of Box–Behenken. It was possible to deduce a statistically reliable regression equation that related the adsorption yield to the chosen operating parameters, that is, the initial MC concentration, the adsorbent dosage and the pH. Analysis of the variance indicated that the most influential parameters were the SSS dosage, the pH and their interaction and showed the optimal values for ensuring the best adsorption capacity of 95.58%.

A first pilot study to produce a food antioxidant from sunflower seed shells (Helianthus annuus)

2005 ◽  
Vol 107 (4) ◽  
pp. 220-227 ◽  
Author(s):  
Antonella De Leonardis ◽  
Vincenzo Macciola ◽  
Nicoletta Di Domenico
Keyword(s):  
Pilot Study ◽  
Helianthus Annuus ◽  
Sunflower Seed ◽  
Sunflower Seed Shells

Strength and microstructural analysis of concrete incorporating ash from sunflower seed shells combustion

2018 ◽  
Vol 20 (1) ◽  
pp. 396-404 ◽  
Author(s):  
Ivanka N. Grubeša ◽  
Miroslava Radeka ◽  
Mirjana Malešev ◽  
Vlastimir Radonjanin ◽  
Anita Gojević ◽  
...  
Keyword(s):  
Sunflower Seed ◽  
Microstructural Analysis ◽  
Sunflower Seed Shells

scholarly journals Removal of orange 16 reactive dye from aqueous solutions by waste sunflower seed shells

2011 ◽  
Vol 76 (4) ◽  
pp. 607-624 ◽  
Author(s):  
Daniela Suteu ◽  
Carmen Zaharia ◽  
Teodor Malutan
Keyword(s):  
Contact Time ◽  
Sunflower Seed ◽  
Reactive Dye ◽  
Diffusion Kinetic ◽  
Sorption Data ◽  
Chemical Surface ◽  
Complex Process ◽  
Intra Particle Diffusion ◽  
Pseudo Second Order ◽  
Sunflower Seed Shells

In this work, the use of an agro-industrial waste, i.e., sunflower seed shells, was investigated as a sorbent for the removal of Orange 16 reactive dye from aqueous environments. Batch experiments were performed as a function of pH, sorbent dose, dye concentration, temperature and contact time. The percent dye removal increased with increasing sorbent dose and temperature of the aqueous solution, and decreased with increasing dye concentration; the required contact time was five hours. The Freundlich, Langmuir, Dubinin-Radushkevich and Tempkin adsorption isotherms were used to describe the equilibrium sorption data and to determine the corresponding isotherm constants. The thermodynamic parameters ?G, ?H and ?S were also determined. These parameters indicated that the sorption of reactive dye onto sunflower seed shells was a spontaneous, endothermic and entropy-driven process. The kinetic data were evaluated by pseudo-first order, pseudo-second order and intra-particle diffusion kinetic models. The results of the kinetic study indicated that the sorption of Orange 16 reactive dye onto sunflower seed shells is a complex process and both chemical surface sorption and intraparticle diffusion contribute to the rate-limiting step. Therefore, the sunflower seed shell showed itself to be a promising cheap sorbent for the decolourization of aqueous coloured solutions or effluents.

scholarly journals Preparation and characterization of porous alumina ceramics using sunflower seed shells as fugitive material

Cerâmica ◽  
2020 ◽  
Vol 66 (378) ◽  
pp. 208-220
Author(s):  
J. Alzukaimi ◽  
R. Jabrah
Keyword(s):  
Sunflower Seed ◽  
Compaction Pressure ◽  
Porous Alumina ◽  
Theoretical Models ◽  
Alumina Ceramics ◽  
Brazilian Disk ◽  
Porosity Effect ◽  
Shell Content ◽  
Sunflower Seed Shells

Abstract Porous alumina ceramics were prepared through the space holder technique, using ground sunflower seed shells as a fugitive material and uniaxial pressing for forming the green ceramics. Influences of the sunflower seed shell content on the shrinkage of the green bodies and porosity of sintered products were evaluated. The prepared ceramics were characterized for mechanical properties using the Brazilian disk test, and the porosity effect on the measured strength was determined. The microstructure was characterized by SEM. The sunflower seed shell content was varied from 0 to 60 wt%. Porosities within 29.9-71.0 vol% were achieved, and the strength of the obtained alumina ceramics decreased accordingly from 59.7 to 4.0 MPa. Additional samples, prepared with different compaction pressure, were characterized for electrical properties and showed high electrical insulation capability, which increased with porosity. Mechanical and electrical data were discussed based on theoretical models, namely the Gibson-Ashby model and/or the minimum solid area model.

Sunflower seed shells: A novel and effective low-cost adsorbent for the removal of the diazo dye Reactive Black 5 from aqueous solutions

2007 ◽  
Vol 147 (3) ◽  
pp. 900-905 ◽  
Author(s):  
Johann F. Osma ◽  
Verónica Saravia ◽  
José L. Toca-Herrera ◽  
Susana Rodríguez Couto
Keyword(s):  
Aqueous Solutions ◽  
Sunflower Seed ◽  
Low Cost ◽  
Reactive Black 5 ◽  
Diazo Dye ◽  
Sunflower Seed Shells
Sign in / Sign up

Export Citation Format

Share Document