scholarly journals Kinetic and Isothermal Investigations of Cost-Effective Sorptive Elimination of Gentian Violet Dye from Water Using Haplophragma adenophyllum Biowaste

2021 ◽  
Vol 2021 ◽  
pp. 1-12
Author(s):  
Momal Akram ◽  
Muhammad Salman ◽  
Rabia Rehman ◽  
Umar Farooq ◽  
Samra Tahir ◽  
...  
Keyword(s):  
Gentian Violet ◽  
Process Condition ◽  
Cost Effective ◽  
Optimum Process ◽  
The Novel ◽  
Order Model ◽  
Equilibrium Study ◽  
Freundlich Isotherms ◽  
Biosorption Mechanism ◽  
Pseudo Second Order

A novel biosorbent, Haplophragma adenophyllum (HAB) was employed to explore the biosorption mechanism of Gentian Violet (GV) dye. The novel sorbent was characterized by using FTIR spectra and physiochemical analysis. The effect of different optimizing factors like HAB dosage, GV initial concentration, contact time between sorbent and sorbate, pH of a solution, and the temperature was studied. The optimum removal of GV by HAB was observed at pH 6.0. The equilibrium study was carried out using Langmuir and Freundlich isotherms. Experimental data fitted well in Langmuir isotherm indicating monolayer isotherm with qmax value obtained at optimum process condition of 13.21 mg/g. Kinetics study was carried out and followed by pseudo-second-order model. Thermodynamics studies reveal the endothermic reaction.

Adsorption of methyl violet from aqueous solution using brown algae Padina sanctae-crucis

2018 ◽  
Vol 43 (6) ◽  
pp. 623-631 ◽  
Author(s):  
Reza Mahini ◽  
Hossein Esmaeili ◽  
Rauf Foroutan
Keyword(s):  
Aqueous Solutions ◽  
Brown Algae ◽  
Contact Time ◽  
Methyl Violet ◽  
Kinetic Studies ◽  
Maximum Adsorption Capacity ◽  
Order Model ◽  
Equilibrium Study ◽  
Freundlich Isotherms ◽  
Pseudo Second Order

Abstract Objective The presence of dyes in the water is toxic and harmful to human body so, it must be removed from the water. In the present study, the removal of methyl violet (MV) from aqueous solutions using brown algae “Padina sanctae-crucis” was investigated. Materials and methods The rate of adsorption was investigated under various parameters such as contact time (5–200), pH (2–11), dye concentration (10–60 mg/L), amount of adsorbent (0.25–5 g/L) and temperature (25–45°C). Results The maximum adsorption was achieved in 10 mg/L, pH=8 and adsorbent dose 2 g/L and 80 min contact time for removal of MV from aqueous solutions. Kinetic studies showed that the pseudo second-order model describes adsorbent kinetic behavior better. Besides, experimental data have been modeled using Langmuir and Freundlich isotherms and the results showed that both models are proper to describe adsorption isotherm behavior. In addition, the equilibrium study shows that the adsorption was physical and favorable. Moreover, a thermodynamic study revealed that the adsorption process is exothermic and spontaneously in nature. Furthermore, Maximum adsorption capacity using adsorbent was 10.02 mg/g. Conclusions It could be concluded that the P. sanctae-crucis biomass is a good adsorbent for removing MV dyes from aqueous solutions.

scholarly journals Preparation of Palm Oil Industry’s Biomass-Based Graphene Composite for the Adsorptive Removal of Methylene Blue

2021 ◽  
Vol 2021 ◽  
pp. 1-11
Author(s):  
Yeit Haan Teow ◽  
Wan Nur Athirah Wan Mohammad Hamdan ◽  
Abdul Wahab Mohammad
Keyword(s):  
Methylene Blue ◽  
Dye Removal ◽  
Base Material ◽  
Cost Effective ◽  
Order Model ◽  
Freundlich Model ◽  
Column Study ◽  
Equilibrium Study ◽  
Pseudo Second Order ◽  
Shell Composite

The ability of POME-based graphene shell composite (P-GSC), an adsorbent generated from oil palm wastes abundantly available in Malaysia such as POME and PKS, was examined in removing methylene blue (MB) dye by adsorption. Adsorption experiments, involving a batch column study and a batch equilibrium study, were conducted to investigate the efficiency of synthesized P-GSC from PKS as a base material in the removal of MB dye. The batch column study demonstrated that small-sized synthesized P-GSC from PKS as a base material could remove up to 98.5% for concentration. Therefore, the following batch equilibrium study was carried out on small-sized P-GSC only. Adsorption isotherms and kinetic isotherms were studied, from which the experimental data showed that the adsorption exhibited a good fit with the Freundlich model ( R 2 = 0.8923 ) and followed the pseudo-second order model ( R 2 > 0.98 ). FESEM, XPS, and XRD morphological and elemental analysis indicated the successful graphinization of POME on the P-GSC surface. The concept of deploying POME as the carbonaceous source to produce P-GSC, and then, deploying the resultant P-GSC as the adsorbent for MB dye removal has presented promising practical potential. Such cost-effective and environmentally friendly reuse of waste materials is envisioned to promote a ‘zero-waste industry.’

scholarly journals Effectiveness of termite hill as an economic adsorbent for the adsorption of alizarin red dye

2018 ◽  
Vol 9 (1) ◽  
pp. 83-93 ◽  
Author(s):  
Olushola S. Ayanda ◽  
Olusola S. Amodu ◽  
Habibat Adubiaro ◽  
Godwin O. Olutona ◽  
Oluwapese T. Ebenezer ◽  
...  
Keyword(s):  
Low Cost ◽  
Adsorption Model ◽  
Order Model ◽  
Alizarin Red ◽  
Langmuir Adsorption ◽  
Equilibrium Study ◽  
Natural Adsorbents ◽  
Pseudo Second Order ◽  
Red Dye ◽  
Modern Analytical

Abstract The adsorption of alizarin red (AR) dye onto termite hill sample (THs) was investigated. Prior to the adsorption studies, the elemental, morphological, surface and structural properties of THs were examined by modern analytical methods. Instrumental analysis showed that the homogenous micro-structured THs are comprised of iron oxide, silica oxide, and alumina as major components. Experiments showed that the adsorption capacity of AR decreases with increasing pH and initial AR concentrations, and increases with increasing contact time, stirring speed and temperature. The equilibrium study obeyed the Langmuir adsorption model and the kinetics followed the pseudo-second-order model. About 95.0% AR reduction (1.425 mg/g) was achieved when 0.8 g of THs was mixed with 30 mL of 40 mg/L AR solution for 120 min at 400 rpm and a pH of 2. Thermodynamic study suggested that AR adsorption onto THs is spontaneous at higher temperatures of 323 K and above (ΔGo values are negative). However, ΔGo are positive at lower temperatures of 293–313 K, which implies that the adsorption process is not spontaneous at these temperatures. This study showed that THs could be used as alternative, low-cost, natural adsorbents for the removal of dyes from wastewater.

scholarly journals Kinetic Analysis of the Adsorption of Ethyl Violet onto Graphene Oxide Sheets Integrated with Gold Nanoparticles

2021 ◽  
Vol 9 (2) ◽  
pp. 35-39
Author(s):  
Bilal Ibrahim Dan-Iya ◽  
Ain Aqilah Basirun ◽  
Mohd Yunus Shukor
Keyword(s):  
Graphene Oxide ◽  
Confidence Interval ◽  
Information Criterion ◽  
Cost Effective ◽  
Order Rate Constant ◽  
Coefficient Of Determination ◽  
Order Model ◽  
Ethyl Violet ◽  
Bias Factor ◽  
Pseudo Second Order

An example of biosorption is when the sorbent is made from a biodegradable material. Biosorption is now being seen as a simple, cost-effective, and environmentally acceptable alternative to traditional pollution treatment methods. Bioremediation is one of the branches of bioremediation that is used to minimise pollution in the context of incorrect dye waste disposal. The sorption isotherm of Ethyl Violet onto graphene oxide were analyzed using three models—pseudo-1st, pseudo-2nd and Elovich, and fitted using non-linear regression. Statistical analysis based on root-mean-square error (RMSE), adjusted coefficient of determination (adjR2), bias factor (BF), accuracy factor (AF), corrected AICc (Akaike Information Criterion), Bayesian Information Criterion (BIC) and Hannan–Quinn information criterion (HQC) that showed that the pseudo-second-order model was the best which was the same finding from the original published work. The calculated evidence ratio was 11 with an AICc probability value of 0.91 indicating that the best model was at least 11 times better than the nearest best model, which was pseudo-1st. Further analysis is needed to provide proof for the mechanism usually tied to this kinetic. Nonlinear regression analysis using the pseudo-2nd order model for the highest concentration tested, which was 10 mM, gave values of equilibrium sorption capacity qe of 30.928 mg/g (95% confidence interval from 29.328 to 32.527) and a value of the pseudo-2nd-order rate constant, k2 of 0.020 (95% confidence interval from 0.011 to 0.028).

scholarly journals Removal of textile dye Remazol Brilliant Blue Reactive (RBBR) using fibers of Citrullus lanatus (watermelon) and Cocos nucifera (green coconut) as adsorbent material

2019 ◽  
Vol 23 ◽  
pp. 5
Author(s):  
Melissa Dominique de Sousa Krueger ◽  
Ana Carolina Volkmann ◽  
Karine Thaise Rainert
Keyword(s):  
Dye Removal ◽  
Citrullus Lanatus ◽  
Cocos Nucifera ◽  
Freundlich Isotherm ◽  
Brilliant Blue ◽  
Textile Dye ◽  
Order Model ◽  
Independent Variables ◽  
Equilibrium Study ◽  
Pseudo Second Order

The accumulation of agro-industrial waste causes major environmental problems since most of these wastes are disposed of improperly. Among them, there are the watermelon (Citrullus lanatus) and the green coconut (Cocos nucifera), fruits of resistant and fibrous peels which are discarded in landfills because they are not widely used. Thus, the adsorption capacity of the Remazol Brilliant Blue Reactive (RBBR) dye was investigated using green coconut and watermelon residues as adsorbents. The combined effects of two independent variables (pH and adsorbent mass) were evaluated using the response surface methodology. Under optimal conditions of acid pH and adsorbent mass of 1 g, the dye removal efficiency reached values above 80% for both residues. The adsorption kinetics was described by the pseudo-second order model, while the equilibrium study was represented by the Freundlich isotherm for the watermelon residue and the Langmuir model for the green coconut. The results show that the agroindustrial residues of watermelon and green coconut could be effectively used to remove dye remazol brilliant blue reactive.

Adsorption of Congo Red from Aqueous Solutions by the Activated Carbons Prepared from Grapefruit Peel

2014 ◽  
Vol 529 ◽  
pp. 3-7 ◽  
Author(s):  
Hai Yi Huang ◽  
Liu Dan Luo ◽  
Hua Zhang ◽  
Yan Qin Lu ◽  
Di Zhang
Keyword(s):  
Congo Red ◽  
Activated Carbons ◽  
Chemical Activation ◽  
Raw Material ◽  
Order Model ◽  
Acid Condition ◽  
Freundlich Isotherms ◽  
Grapefruit Peel ◽  
Pseudo Second Order ◽  
Direct Red 28

Grapefruit Peel, which is the main waste from a southern fruit-Grapefruit in Guangxi, China. It has been used as a raw material for activated carbons by chemical activation with NaOH for the removal of Congo red (Direct Red 28) from aqueous solution in this study. The adsorption of CR by Grapefruit peel carbon (GPC) was carried out by many parameters such as pH, dye initial concentration, agitation time and temperature. It is favorable for the adsorption of Congo red in acid condition. The adsorption experimental results were analyzed by using the Langmuir and Freundlich isotherms models. Adsorption kinetic data were followed pseudo-second-order model.

scholarly journals Weathered Sand of Basalt as a Potential Nickel Adsorbent

Processes ◽  
2020 ◽  
Vol 8 (10) ◽  
pp. 1238
Author(s):  
Jae Hong Park ◽  
Jae Kwan Lee
Keyword(s):  
Adsorption Process ◽  
Sem Analysis ◽  
Langmuir Model ◽  
X Ray Diffraction ◽  
Order Model ◽  
X Ray ◽  
Freundlich Isotherms ◽  
Freundlich Equation ◽  
Low Concentrations ◽  
Pseudo Second Order

The natural mineral, weathered sand of basalt (WSB), was utilized to investigate whether nickel can be removed. X-ray diffraction (XRD) and scanning electron microscopy (SEM) analysis were performed to characterize WSB. The effects of various conditions, i.e., contact time, pH, WSB dosage, particle size of WSB, and temperature were analyzed. The experimental data were analyzed by two widely used equations, i.e., Langmuir and Freundlich isotherms. The results obtained revealed that the WSB adsorption process was more consistent with the Langmuir model than the Freundlich equation. The kinetics data fitted well into the pseudo-second-order model. The findings of the present study indicate that WSB could be used for removing nickel from aqueous solution. Moreover, its concentration can be reduced from 1.0 mg/L to ND (not detected, below the device limit <0.01 μg/L) under the optimal condition. Therefore, WSB is considered to be usable as one of the adsorbents for nickel removal in water. In addition, since heavy metals are often present in low concentrations in water, it is considered that WSB can be applied as one of the effective alternatives for removing low-concentration nickel.

scholarly journals Equilibrium and Kinetics Studies of Gentian Violet Dye Adsorption on to Activated Carbon Prepared From Aldhnan Hull

2017 ◽  
Vol 28 (1) ◽  
pp. 89
Author(s):  
Khudhair A. Kareem
Keyword(s):  
Activated Carbon ◽  
Gentian Violet ◽  
Equilibrium Constants ◽  
Dye Adsorption ◽  
Second Order ◽  
Point Of Zero Charge ◽  
Order Model ◽  
Batch Mode ◽  
Pseudo Second Order ◽  
Second Order Model

The present study investigated the key parameters and mechanism affecting the removal of Gentian Violet(GV) dye from aqueous medium, using Activated Carbon(AC) produced from hull of Aldhnan. The AC characterized by FTIR spectra to indicate the surface Characteristic groups of adsorbent affect the adsorption. The pH at point of zero charge showed the anionic nature of adsorbent surface and by using batch mode, the study considering the typical condition for adsorption of GV dye by the AC such as; effect of initial dye concentration, pH and contact time. The adsorption kinetics and equilibrium constants was achieved at 305K and the Langmuir isotherm model fit for the equilibrium data better than Freundlich model. Kinetics of adsorption was studied by testing the data in the pseudo first order (Lagergren Equation) and pseudo second order model and the adsorption of GV dye onto AC obeyed pseudo second order model. Thermodynamic studies exhibit that the adsorption reaction is endothermic in nature and spontaneous.

Effective adsorption of nickel (II) with Ulva lactuca dried biomass: isotherms, kinetics and mechanisms

2018 ◽  
Vol 78 (1) ◽  
pp. 156-164 ◽  
Author(s):  
Jianyou Long ◽  
Xiaona Huang ◽  
Xiaoli Fan ◽  
Yan Peng ◽  
Jianrong Xia
Keyword(s):  
Contact Time ◽  
Cost Effective ◽  
Ulva Lactuca ◽  
Hydroxyl Groups ◽  
Order Model ◽  
Initial Ph ◽  
Endothermic Process ◽  
Pseudo Second Order ◽  
Ft Ir ◽  
Biomass Dosage

Abstract This study aimed to evaluate the Ni2+ ions adsorption capability of Ulva lactuca. The isotherms, kinetics and mechanisms for the adsorption of Ni2+ from aqueous solution by Ulva lactuca were also investigated. Influencing factors including initial pH, initial Ni2+ concentration, biomass, contact time were examined. The results indicate that the maximum Ni2+ adsorption capacity of 38.28 mg/g was obtained at pH 5, initial Ni2+ concentration 250 mg/L, biomass dosage 0.5 g/L and contact time 30 min. The adsorption can be well fitted with Langmuir isotherm, and the kinetics were well described by the pseudo-second-order model. The parameters of thermodynamics verified that Ni2+ adsorption on Ulva lactuca was a spontaneous and endothermic process. Analyses of FT-IR, SEM-EDS and XPS indicate that carboxyl and hydroxyl groups on the surface of biomass are involved in Ni2+ adsorption. The dried biomass of Ulva lactuca can be a cost-effective and eco-friendly adsorbent for the removal of Ni2+ from wastewater.

scholarly journals Kinetics and isotherm modeling of Pb(II) and Cd(II) sequestration from polluted water onto tropical ultisol obtained from Enugu Nigeria

2021 ◽  
Vol 11 (4) ◽  
Author(s):  
Theresa C. Umeh ◽  
John K. Nduka ◽  
Kovo G. Akpomie
Keyword(s):  
Metal Ions ◽  
Low Cost ◽  
Water Environment ◽  
Standard Technique ◽  
Soil Surface ◽  
Cost Effective ◽  
Polluted Water ◽  
Batch Adsorption ◽  
Lead And Cadmium ◽  
Pseudo Second Order

AbstractDeterioration in soil–water environment severely contributed by heavy metal bioavailability and mobility on soil surface and sub-surface due to irrational increase in wastewater discharge and agrochemical activities. Therefore, the feasibility of adsorption characteristics of the soil is paramount in curbing the problem of micropollutant contamination in the farming vicinity. Soil from a farming site in a populated area in Enugu, Nigeria was collected and tested to measure the lead and cadmium contents using atomic absorption spectrophotometer (AAS). The adsorption potency of the ultisol soil was estimated for identifiable physicochemical properties by standard technique. The mean activity concentration of Pb2+ and Cd2+ was 15.68 mg/kg and 3.01 mg/kg. The pH, temperature, metal concentration and contact time adsorptive effect on the Pb2+ and Cd2+ uptake was evaluated by batch adsorption technique. The Langmuir, Freundlich and Temkin models were fitted into equilibrium adsorption data and the calculated results depict a better and satisfactory correlation for Langmuir with higher linear regression coefficients (Pb2+, 0.935 and Cd2+, 0.971). On the basis of sorption capacity mechanism of the soil, pseudo-second-order model best described the kinetics of both metal ions retention process. The results of the present study indicated that the soil being a low cost-effective adsorbent can be utilized to minimize the environmental risk impact of these metal ions.

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