scholarly journals Adsorption of Crystal Violet onto an Agricultural Waste Residue: Kinetics, Isotherm, Thermodynamics, and Mechanism of Adsorption

2020 ◽  
Vol 2020 ◽  
pp. 1-9 ◽  
Author(s):  
Ilyasse Loulidi ◽  
Fatima Boukhlifi ◽  
Mbarka Ouchabi ◽  
Abdelouahed Amar ◽  
Maria Jabri ◽  
...  
Keyword(s):  
Crystal Violet ◽  
Low Cost ◽  
Agricultural Waste ◽  
X Ray Diffraction ◽  
Almond Shell ◽  
Experimental Conditions ◽  
Batch Mode ◽  
Crystal Violet Dye ◽  
Pseudo Second Order ◽  
Effectiveness And Efficiency

Agricultural waste can be exploited for the adsorption of dyes, due to their low cost, availability, cost-effectiveness, and efficiency. In this study, we were interested in the elimination of crystal violet dye, from aqueous solutions, by adsorption on almond shell-based material, as a low-cost and ecofriendly adsorbent. The almond shells were first analyzed by Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction; then, the influence of adsorbent dose, initial dye concentration time, and pH were studied to assess adsorption capacity under optimal experimental conditions. Experimental results indicate that almond shell adsorbent removes about 83% of the dye from the solutions at room temperature and in batch mode; the kinetic study showed that the equilibrium time is about 90 min, and the model of pseudo-second order could very well describe adsorption kinetics. The modulation of adsorption isotherms showed that retention follows the Langmuir model. The thermodynamic study has shown that the adsorption is endothermic (ΔH° > 0) and spontaneous (ΔG° < 0).

scholarly journals CHARACTERIZATION AND POTENTIAL SUITABILITY OF SIMAROUBA GLAUCA SEED SHELL LIGNOCELLULOSIC BIOMASS AS ADSORBENT OF BASIC DYES FROM AQUEOUS SOLUTIONS

2021 ◽  
Vol 55 (5-6) ◽  
pp. 705-722
Author(s):  
JEYAGOWRI BALAKRISHNAN ◽  
YAMUNA RANGAIYA THIAGARAJAN
Keyword(s):  
Aqueous Solutions ◽  
Cost Effective ◽  
Second Order ◽  
Cationic Dyes ◽  
X Ray Diffraction ◽  
Experimental Conditions ◽  
Batch Mode ◽  
Pseudo Second Order ◽  
Simarouba Glauca ◽  
Shell Powder

The present study investigates the potential of Simarouba glauca seed shell powder as a cost-effective adsorbent for the removal of the cationic dyes Malachite green (MG), Methylene blue (MB) and Rhodamine B (RB) from aqueous solutions. The adsorbent was characterized by Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) and X-ray diffraction (XRD), as well as by Brunauer–Emmett–Teller (BET) and elemental (CHNS) analyses. Batch mode adsorption studies were carried out varying the experimental conditions, such as initial dye concentration and contact time, adsorbent dose, pH and particle size, in order to assess the adsorbent capacity for the removal of cationic dyes from wastewater. The experimental data were analysed using the Langmuir, Freundlich, Temkin and Dubinin–Radushkevich isotherms. The data fitted well the Langmuir model for the dyes studied. Kinetic data were analysed using the pseudo-first order, pseudo-second order, intraparticle diffusion and Boyd models. The experimental results showed that the pseudo-second order model fitted well.

scholarly journals Crystal Violet Dye Adsorption from Aqueous Solution using Activated Chickpea Husk (Cicer arientum)

2021 ◽  
Vol 34 (1) ◽  
pp. 104-110
Author(s):  
Sonia Rani ◽  
Sudesh Chaudhary
Keyword(s):  
Crystal Violet ◽  
Adsorption Mechanism ◽  
Dye Adsorption ◽  
Second Order ◽  
Order Model ◽  
Batch Mode ◽  
After Effects ◽  
Crystal Violet Dye ◽  
Pseudo Second Order ◽  
Second Order Model

The chickpea husk (Cicer arientum) were activated by chemical modification with sulphuric acid, for its application as biosorbent for the remediation of crystal violet dye from wastewater. Activated chickpea husk (ACH) was characterized for its chemical structure and morphology using Fourier transform infrared spectroscopy (FTIR) and scanning electron microscope (SEM). The after effects of leading affecting parameters like dose of adsorbent, time of contact, pH and concentration were studied by commencing experiments in batch mode. Adsorption mechanism and sorption efficiency of ACH was examined using variety of isotherms (Langmuir & Freundlich) and kinetic models (pseudo first order and pseudo second order). Experimental data for adsorption rate was in good harmony with the results obtained using pseudo second order model. The adsorption capacity determined using Langmuir isotherm and pseudo second order model was found to be 142.85 mg/g.

Valorisation of Waste Mussel Shells as Biosorbent for an Azo Dye Elimination

2019 ◽  
Vol 800 ◽  
pp. 187-192 ◽  
Author(s):  
Halima Delali ◽  
Djilali Redha Merouani ◽  
Hakim Aguedal ◽  
Mustapha Belhakem ◽  
Abdelkader Iddou ◽  
...  
Keyword(s):  
Low Cost ◽  
X Ray Diffraction ◽  
Order Model ◽  
Batch Mode ◽  
Icp Ms ◽  
Orange G ◽  
Langmuir Isotherm Model ◽  
Pseudo Second Order ◽  
Mussel Shells ◽  
Good Agreement

In the present study, the waste shells were used as a new low cost and eco-friendly biosorbant for Orange G anionic dye removal from aqueous solutions. Experiments were conducted in batch mode, and the effect of pH of solution, contact time, and initial dye concentration. X-ray Diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR) and ICP-MS analysis for chemical analysis were used to characterize the obtained biosorbent. The results showed that the mussel shells are composed 73% of calcite and 26% of aragonite with some traces of aluminum, magnesium, sodium, silicium and zinc. The biosorption results show that the optimal pH was around 2 for efficient Orange G biosorption. The equilibrium was attained in 60 min. The kinetic analysis showed that the pseudo-second-order model is in good agreement with the experimental data. The biosorption isotherm was well described by Langmuir isotherm model, the maximumbiosorption capacity was 1000mg/g. The thermodynamic study revealed that the biosorption of Orange G onto mussel shell is spontaneous and exothermic.

scholarly journals Parkia speciosa (Petai) pod as a potential low-cost adsorbent for the removal of toxic crystal violet dye

2016 ◽  
Vol 15 ◽  
Author(s):  
Linda Biaw Leng Lim ◽  
Namal Priyantha ◽  
Hui Hsin Cheng ◽  
Nur Afiqah Hazirah
Keyword(s):  
Adsorption Isotherm ◽  
Crystal Violet ◽  
Low Cost ◽  
Isotherm Models ◽  
Batch Adsorption ◽  
Medium Ph ◽  
Crystal Violet Dye ◽  
Intra Particle Diffusion ◽  
Pseudo Second Order ◽  
Optimized Conditions

This study focused on the use of Parkia speciosa (Petai) pod as a potential adsorbent for the removal of crystal violet (CV) dye. Batch adsorption isotherm experiments carried out under optimized conditions were fitted to six isotherm models, namely Langmuir, Freundlich, Temkin, Dubinin-Radushkevich, Redlich-Peterson and Sips. Of these, the Sips model best described the adsorption isotherm of Petai pod for the removal of CV dye, giving a desirable adsorption capacity (qmax) of 163.2 mg g-1. Adsorption kinetics was found to follow the pseudo-second order, and further, intra-particle diffusion played a significant role. This study also revealed that the adsorption of CV by Petai pod is influenced by the ionic strength of the medium. However, Petai pod showed resilience towards changes in medium pH.  

scholarly journals Equilibrium and kinetic studies of acid dye adsorption on palm oil empty fruit bunch

2014 ◽  
Vol 9 (3) ◽  
Author(s):  
Norini Tahir ◽  
Zaiton Abdul Majid
Keyword(s):  
Palm Oil ◽  
Low Cost ◽  
Agricultural Waste ◽  
Dye Adsorption ◽  
Freundlich Isotherm ◽  
Second Order ◽  
Order Kinetic ◽  
Empty Fruit Bunch ◽  
Batch Mode ◽  
Pseudo Second Order

Palm oil empty fruit bunch (POEFB), an agricultural waste, used as low-cost adsorbent for removal Acid Orange 51 (AO51) dye from aqueous solutions was studied. Batch mode experiments were carried out at room temperature (28 ± 2) °C to study the effects of contact time and initial dye concentrations (10-200 mg/L). The equilibrium adsorption data of AO51 dye on empty fruit bunch were analyzed by three isotherms, namely the Langmuir isotherm, Freundlich isotherm and Temkin isotherm model. The result indicated that the equilibrium sorption fitted well with the Freundlich isotherm, displaying higher regression coefficient, R2value. The monolayer adsorption capacity of POEFB was found to be 166.67 mg/g. The kinetic data obtained at different concentrations have been analyzed using the pseudo-first-order, pseudo-second-order and intraparticle diffusion models. It was shown that pseudo-second-order kinetic model could best describe the adsorption kinetics.

scholarly journals On the Suitability of Almond Shells for the Manufacture of a Natural Low-Cost Bioadsorbent to Remove Brilliant Green: Kinetics and Equilibrium Isotherms Study

2021 ◽  
Vol 2021 ◽  
pp. 1-13
Author(s):  
R. Melhaoui ◽  
Y. Miyah ◽  
S. Kodad ◽  
N. Houmy ◽  
M. Addi ◽  
...  
Keyword(s):  
Brilliant Green ◽  
Low Cost ◽  
Single Layer ◽  
Batch Adsorption ◽  
Almond Shell ◽  
Experimental Conditions ◽  
Layer Adsorption ◽  
Bet Method ◽  
Pseudo Second Order ◽  
Chemical Pollutant

Almond production generates a large number of coproducts, but the farmer’s interest mainly focuses on the nutritional and commercial aspects of the kernel for getting the best return from their harvests. Thus, almond coproducts such as almond shells that represent more than 70% of biomass remain underexplored. In this work, the suitability of almond shell powder (ASP) as a natural low-cost adsorbent was evaluated in the adsorption of brilliant green dye (BG), which is known as a chemical pollutant. Brunauer–Emmett–Teller (BET) method, for the determination of specific surface area, Fourier-transform infrared spectroscopy (FTIR), and scanning electron microscopy (SEM) techniques were performed to characterize the ASP adsorbent. The batch adsorption kinetic study for the removal of BG dye was carried out by varying pH, temperature, initial concentration of the dye, bioadsorbent dose, and contact time. It was found that 98% of BG dye is removed under the following optimal experimental conditions: ASP bioadsorbent dose of 1 g/L at T = 25°C, pH = 6.8, and C0 = 1 g/L, which proves that ASP can be used as an excellent low-cost bioadsorbent for the removal of BG dye from wastewater. The experimental isotherm data were analyzed using Freundlich and Langmuir models. The results show the best correlation with single-layer adsorption, and the adsorption kinetics seems to follow a pseudo-second-order model.

scholarly journals SYNTHESIS OF NANOSILICA FROM RICE HUSK AND OPTIMIZATION OF THE REMOVAL OF CRYSTAL VIOLET DYE FROM AQUEOUS SOLUTION

2018 ◽  
Vol 56 (1A) ◽  
pp. 189
Author(s):  
Nguyen Van Hung
Keyword(s):  
Crystal Violet ◽  
Batch Adsorption ◽  
Order Kinetic ◽  
Absorption Process ◽  
X Ray Diffraction ◽  
X Ray ◽  
Crystal Violet Dye ◽  
Order Kinetic Model ◽  
Pseudo Second Order ◽  
Temperature And Pressure

Nanosilica was synthesized via the hydrothermal technique, followed by the vacuum frying system at low temperature and pressure. Then, the achieved nanoparticles were used for removing of Crystal Violet dye (CV) from wastewater. The absorbent and absorption process were studied by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), Field Emission Scanning Electron Microscope (FE-SEM), X-ray Fluorescence (XRF). Batch adsorption experiments were conducted under different conditions including contact time, initial concentration of dye and adsorbent dose. The kinetic study of CV dye on the nanoparticles can be well depicted theoretically by using pseudo-second-order kinetic model.

scholarly journals Adsorptive removal of catechol and resorcinol by orange flavedo (citrus sinensis): mechanisms based on the flavedo com-ponents d-limonene, carotenoids, ascorbates, flavonoids and hydroxycinnamic acids

2017 ◽  
Vol 6 (1) ◽  
pp. 7
Author(s):  
Kamgaing Theophile ◽  
Doungmo Giscard ◽  
Ngouoko Kouonang Jimmy Julio ◽  
Tchieno Melataguia Francis Merlin ◽  
Ketcha MBadkam Joseph
Keyword(s):  
Contact Time ◽  
Low Cost ◽  
Order Kinetic ◽  
X Ray Diffraction ◽  
Batch Mode ◽  
X Ray ◽  
Adsorbate Concentration ◽  
Order Kinetic Model ◽  
Pseudo Second Order ◽  
Adsorption Phenomena

Orange flavedo and its adsorption behavior towards catechol (Ctc) and resorcinol (Res) were studied. Adsorption experiments were conducted in batch mode at room temperature. X-ray diffraction (XRD), Scanning electron microscopy (SEM), Energy-dispersive X-ray spectroscopy (EDX), Brunauer−Emmett−Teller (BET) and Fourier transform infrared (FTIR) data were used to characterize the biosorbent. The Effects of various parameters including equilibrium pH, sorbent dosage, initial adsorbate concentration and contact time were investigated. The optimum contact time and pH for the removal of Ctc and Res were 35 min and pH 2 respectively. The adsorption isotherms fitted well with Freundlich model, the adsorption of Ctc and Res being multilayer and the surface of orange flavedo heterogeneous; the pseudo-second order kinetic model better reflects the adsorption phenomena. An adsorption mechanism based on the molecules grafted to the surface of the orange flavedo is proposed in this study. 0.2 gram of the biosorbent was sufficient to completely eliminate 2.2 milligrams of resorcinol and catechol from solution. Therefore, non-modified orange flavedo is a promising candidate, as a low-cost biosorbent, for the removal of Ctc and Res from aqueous solution.

scholarly journals Grewia spp. Biopolymer as Low-Cost Biosorbent for Hexavalent Chromium Removal

2019 ◽  
Vol 2019 ◽  
pp. 1-7 ◽  
Author(s):  
G. P. Kofa ◽  
G. R. Nkoue Ndongo ◽  
M. B. Kameni Ngounou ◽  
M. N. Nsoe ◽  
E. V. Amba ◽  
...  
Keyword(s):  
Hexavalent Chromium ◽  
Low Cost ◽  
Infrared Spectrometry ◽  
X Ray Diffraction ◽  
Order Model ◽  
Solution Ph ◽  
Batch Mode ◽  
Pseudo Second Order ◽  
Langmuir And Freundlich Models

In this study, Grewia spp. biopolymer was utilized as a biosorbent for elimination of hexavalent chromium from water. Fourier-transform infrared spectrometry (FTIR) and X-ray diffraction (XRD) were performed for characterization of the biosorbent. Experiments were conducted in a batch mode at room temperature (25 ± 2°C) and agitation speed of 100 rpm to determine the influence of biosorbent dose, contact time, Cr(VI) concentration, and initial solution pH. It was found that equilibrium was attained in 50 min. A pseudo-first-order model suited well than a pseudo-second-order model. Biosorption capacity of Grewia spp. biopolymer increased with increase in concentration and depended on the solution pH. Langmuir and Freundlich models described experimental data very well. These findings showed that Grewia spp. biopolymer can serve as a biosorbent for elimination of Cr(VI) from water.

scholarly journals Use of Lignite as a Low-Cost Material for Cadmium and Copper Removal from Aqueous Solutions: Assessment of Adsorption Characteristics and Exploration of Involved Mechanisms

Water ◽  
2021 ◽  
Vol 13 (2) ◽  
pp. 164
Author(s):  
Salah Jellali ◽  
Ahmed Amine Azzaz ◽  
Mejdi Jeguirim ◽  
Helmi Hamdi ◽  
Ammar Mlayah
Keyword(s):  
Aqueous Solutions ◽  
Low Cost ◽  
X Ray Diffraction ◽  
High Adsorption ◽  
Experimental Conditions ◽  
X Ray ◽  
Ph Values ◽  
Adsorption Capacities ◽  
Or Groups ◽  
Pseudo Second Order

Lignite, as an available and low-cost material, was tested for cadmium (Cd) and copper (Cu) removal from aqueous solutions under various static experimental conditions. Experimental results showed that the removal efficiency of both metals was improved by increasing their initial concentrations, adsorbent dosage and aqueous pH values. The adsorption kinetic was very rapid for Cd since about 78% of the totally adsorbed amounts were removed after a contact time of only 1 min. For Cd and Cu, the kinetic and isothermal data were well fitted with pseudo-second order and Freundlich models, respectively, which suggests that Cd/Cu removal by lignite occurs heterogeneously on multilayers surfaces. The maximum Langmuir’s adsorption capacities of Cd and Cu were assessed to 38.0 and 21.4 mg g−1 and are relatively important compared to some other lignites and raw natural materials. Results of proximate, scanning electron microscopy/energy dispersive X-ray spectroscopy (SEM/EDS), Fourier transform infrared spectroscopy (FTIR) and X-Ray diffraction (XRD) showed that the removal of these metals occurs most likely through a combination of cation exchange and complexation with specific functional groups. The relatively high adsorption capacity of the used lignite promotes its future use as a low cost material for Cd and Cu removal from effluents, and possibly for other heavy metals or groups of pollutants.

Sign in / Sign up

Export Citation Format

Share Document