scholarly journals Myristica fragrans Shells as Potential Low Cost Bio-Adsorbent for the Efficient Removal of Rose Bengal from Aqueous Solution: Characteristic and Kinetic Study

2020 ◽  
Vol 20 (5) ◽  
pp. 1152
Author(s):  
Azal Shakir Waheeb ◽  
Hassan Abbas Habeeb Alshamsi ◽  
Mohammed Kassim Al-Hussainawy ◽  
Haider Radhi Saud
Keyword(s):  
Rose Bengal ◽  
Low Cost ◽  
Isotherm Models ◽  
Batch Adsorption ◽  
Gravimetric Analysis ◽  
Isothermal Model ◽  
Force Microscopy ◽  
Myristica Fragrans ◽  
Before And After ◽  
Pseudo Second Order

In the present study, the Myristica fragrans shells (MFS) was used as low-cost bio adsorbent for the removal of Rose Bengal (RB) dye from aqueous solutions. The characteristics of MFS powder were studied before and after adsorption using different techniques such as Fourier transform Infrared spectroscopy (FTIR), Thermal Gravimetric Analysis (TGA), BET and BJH surface area analysis, Atomic Force Microscopy (AFM) and Scanning Electron Microscopy (SEM). Batch adsorption was adopted to evaluate the effect of various parameters on the removal of RB such as; time of contact (5–75 min), initial dye concentration (10–50 mg L–1), adsorbent dose (0.1–1.7 g L–1) and pH (3–12). The results revealed that the coverage of MFS surface by RB molecules involved the formation of ester bond (esterification), and the pore diameter decreased from 190.55 to 2.43 nm when adsorption of RB onto MFS surface occurred. Experimental adsorption data were modelled using isotherm models including Langmuir, Freundlich, and Temkin. Temkin isotherm demonstrated to be the best isothermal model, and the results indicate that the adsorption of Rose Bengal on MFS surface follows pseudo second-order kinetics model. The adsorption of dye at different pH media showed that the esterification process was more preferred in acidic solution.

scholarly journals Study of the Digestate as an Innovative and Low-Cost Adsorbent for the Removal of Dyes in Wastewater

Processes ◽  
2020 ◽  
Vol 8 (7) ◽  
pp. 852
Author(s):  
Sicong Yao ◽  
Massimiliano Fabbricino ◽  
Marco Race ◽  
Alberto Ferraro ◽  
Ludovico Pontoni ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Contact Time ◽  
Removal Rate ◽  
Low Cost ◽  
Second Order ◽  
Isotherm Models ◽  
Batch Adsorption ◽  
Order Kinetic ◽  
Diffusion Kinetic ◽  
Pseudo Second Order

Digestate, as an urban solid waste, was considered as an innovative adsorbent for colorant polluted wastewater. Batch adsorption experiments were carried out using digestate as an adsorbent material to remove various dyes belonging to different categories. The removal rate and adsorption capacity of dyes were evaluated and the dose of digestate, contact time, and initial dye concentration were studied. The maximum removal rate was approximately 96% for Methylene Blue. The equilibrium time for the Methylene Blue was 4 h, while for other dyes, a longer contact time was required to reach the equilibrium. The suspicion of colloidal matter release into the solution from solid fraction of the digestate led to the investigation of the consequence of a washing step of the digestate adsorbent upstream the adsorption experiment. Washed and not washed adsorbents were tested and the differences between them in terms of dye removal were compared. Moreover, experimental data were fitted by pseudo-first order, pseudo-second order, and intra-partial diffusion kinetic models as well as Langmuir, Freundlich, and Sips isotherm models. The results from fitted models showed that the adsorption of various dyes onto the digestate was mostly well fitted by the Langmuir isotherm and pseudo-second-order kinetic model.

UTILIZATION OF DURIAN PEEL AS POTENTIAL ADSORBENT FOR BISPHENOL A REMOVAL IN AQUOEUS SOLUTION

2015 ◽  
Vol 74 (11) ◽  
Author(s):  
Zainab Mat Lazim ◽  
Tony Hadibarata ◽  
Mohd Hafiz Puteh ◽  
Zulkifli Yusop ◽  
Riry Wirasnita ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Sulfuric Acid ◽  
Low Cost ◽  
Agricultural Waste ◽  
Order Type ◽  
Batch Adsorption ◽  
Operational Parameters ◽  
Before And After ◽  
Pseudo Second Order ◽  
Solution Kinetic

This study explored the low-cost adsorbent of durian peel for BPA removal from aqueous solutions. The effect of various operational parameters such as contact time, temperature, concentration, agitation and pH on the adsorption of BPA was investigated using the batch adsorption study. It was found that Durian peel can be used as a low cost adsorbent for the removal of BPA in aqueous solution after treated with sulfuric acid. The effects of morphology, functional groups, and surface area of adsorbent, before and after pretreatment with sulfuric acid and reaction were investigated by using FESEM, FTIR, and BET. The present study indicates that durian peel had removed 69.63% of BPA with adsorption capacity of 4.178 mg/g for 24 hours. The result proved that this treated agricultural waste was promising material as an alternative adsorbent for the removal of BPA from aqueous solution. Kinetic study of the results gave a pseudo-second order type of mechanism while the adsorption characteristics of the adsorbent followed the Langmuir adsorption isotherm.

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 Kinetics and adsorption studies of lead (II) onto activated carbon using low cost adsorbents

2018 ◽  
Vol 20 (2) ◽  
pp. 381-388 ◽  
Keyword(s):  
Low Cost ◽  
Freundlich Isotherm ◽  
Isotherm Models ◽  
Batch Adsorption ◽  
Order Kinetic ◽  
Rate Limiting Step ◽  
Bambusa Vulgaris ◽  
Order Kinetic Model ◽  
Pseudo Second Order ◽  
Fagopyrum Esculentum Moench

The removal of Lead (II) from aqueous solutions using Fagopyrum esculentum Moench (Buckwheat) and Bambusa vulgaris (common bamboo) as adsorbents was investigated. The effects of various experimental parameters such as initial concentration, contact time and pH have been studied using batch adsorption technique. All the Adsorption isotherm models fitted well with the adsorption data. However, Freundlich isotherm displayed a better fitting model than the other two isotherm models due to high correlation coefficient (R2). This indicates the applicability of multilayer coverage of the Pb (II) on the surface of adsorbent. The adsorption kinetics was studied using four simplified models and it was found to follow the pseudo-second-order kinetic model which confirmed the applicability of the model. The adsorption mechanism was found to be chemisorption and the rate-limiting step was mainly surface adsorption.

scholarly journals Temperature Effect in Adsorption of Blue HE-3R on Calendula officinalis: Isotherm, Kinetics and Thermodynamics

2019 ◽  
Vol 31 (6) ◽  
pp. 1255-1259
Author(s):  
M.K. RAMAN ◽  
G. MUTHURAMAN
Keyword(s):  
Adsorption Process ◽  
Low Cost ◽  
Reactive Dye ◽  
Second Order ◽  
Isotherm Models ◽  
Batch Adsorption ◽  
Calendula Officinalis ◽  
Sem Image ◽  
Pseudo Second Order ◽  
The Difference

Adsorption of a textile reactive dye blue HE-3R was carried out with a low-cost adsorbent material i.e., Calendula officinalis. The batch adsorption experiment was done with respect to the effect of pH, concentration of dyes, adsorbent dose and contact time. All the experimental results were analyzed for the suitability of Isotherm models (Freundlich, Langmuir, Redlich-Peterson and Tempkin) and kinetic models (pseudo-first-order, pseudo-second-order, intra-particle diffusion and Elovich). Adsorption process follows Redlich-Peterson isotherm and Pseudo-second order kinetics. The maximum adsorption quantity was found to be 17.85 mg g-1 for the adsorption of blue HE-3R on Calendula officinalis. The low temperature favours the adsorption process. The difference in the SEM image and changes in the group frequencies in FT-IR spectra supports the adsorption of Blue HE-3R on Calendula officinalis effectively.

scholarly journals ADSORPTION STUDIES ON THE REMOVAL OF NAPHTOL-AS DYE USING IRON FILINGS AS ADSORBENT

2021 ◽  
Vol 46 (2) ◽  
Author(s):  
C. M. Ngwu ◽  
O. K. Amadi ◽  
M. O. Mac-Kalunta ◽  
J. Onyeuwaoma
Keyword(s):  
Experimental Data ◽  
Low Cost ◽  
Freundlich Isotherm ◽  
Kinetic Studies ◽  
Second Order ◽  
Isotherm Models ◽  
Batch Adsorption ◽  
Adsorption Processes ◽  
Pseudo Second Order ◽  
Controlled Adsorption

This study investigated the potential of iron filings as low cost and environmentally friendly adsorbent for removing Naphthol AS dye from aqueous solutions. The batch-adsorption experiments were performed as a function of pH, temperature, concentration, contact time as well as dynamics of the process. The Langmuir, Freundlich and Dubinin-Raduskevich isotherm models for the adsorption processes were tested but Freundlich isotherm provided the best description for adsorption of the dye solution onto the iron filings, suggesting a physisorption controlled adsorption. The adsorption process was highly pH-dependent and the result indicates that the optimum pH for adsorption of Naphthol AS onto the adsorbent occurred at 4.0 having a maximum removal efficiency of 88 % respectively. Pseudo first-order and second-order as well as the intra-particle diffusivity kinetic models were applied to the experimental data and results showed that the pseudo second-order provided best fit for the experimental data. Kinetic studies also showed that the adsorption transport mechanism was particle-diffusion controlled.

scholarly journals Adsorption Thermodynamic and Kinetic Studies of Methyl Orange onto Sugar Scum Powder as a Low-Cost Inorganic Adsorbent

2020 ◽  
Vol 2020 ◽  
pp. 1-10 ◽  
Author(s):  
Y. El maguana ◽  
N. Elhadiri ◽  
M. Benchanaa ◽  
R. Chikri
Keyword(s):  
Methyl Orange ◽  
Low Cost ◽  
Kinetic Studies ◽  
Isotherm Models ◽  
Batch Adsorption ◽  
Order Kinetic ◽  
Monolayer Adsorption ◽  
Adsorption Isotherm Models ◽  
Pseudo Second Order ◽  
Efficient Adsorbent

In the present study, batch adsorption experiments were carried out to investigate the removal of methyl orange (MO) from aqueous solution using sugar scum powder as an effective inorganic adsorbent which is a cheap precursor and abundant. The characteristics of this material were determined using XRD, SEM/EDX, and FTIR. The adsorption performance of sugar scum powder was evaluated using MO as the model adsorbate. Effects of various parameters such as initial dye concentration, contact time, and adsorbent dose were studied. The adsorption process can be best described by the pseudo-second-order kinetic and Langmuir adsorption isotherm models. Maximum monolayer adsorption capacity for MO removal was found to be 15.24 mg/g at temperature 22°C and pH 7.2. Moreover, thermodynamic parameters suggested that the adsorption of MO onto sugar scum powder was a spontaneous and exothermic process. The results demonstrated that sugar scum is a suitable precursor for the preparation of efficient adsorbent for dye removal 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.

scholarly journals Removal of Cadmium(II) from Water using Modified Citrus limettioides Peels: Thermodynamic and Isotherm Studies

2019 ◽  
Vol 32 (1) ◽  
pp. 73-78
Author(s):  
P. Janaki ◽  
R. Sudha ◽  
T.S. Sribharathi ◽  
P. Anitha ◽  
K. Poornima ◽  
...  
Keyword(s):  
Adsorption Process ◽  
Low Cost ◽  
Raw Material ◽  
Isotherm Models ◽  
Batch Adsorption ◽  
Adsorption Method ◽  
Chemically Modified ◽  
Adsorption Performance ◽  
Monolayer Adsorption ◽  
Isotherm Equations

The adsorption performance of sulphuric acid treated low cost adsorbent synthesized by using Citrus limettioides peel as an effective raw material for the removal of cadmium(II) from water. The batch adsorption method was carried out to optimize some parameters like contact time, pH and adsorbent dose. The nonlinear isotherm equations were used to calculate the different isotherm constant of five isotherm models namely Freundlich, Langmuir, Dubinin-Radushkevich, Redlich-Peterson and Sips. The Langmuir monolayer adsorption capacity of chemically modified Citrus limettioides peel was found to be 287.60 mg g-1. The negative values of ΔGº and ΔHº showed that the adsorption process is spontaneous and exothermic.

scholarly journals Reduction of chromium (VI) from aqueous solution by biomass of Cladosporium cladosporioides

2017 ◽  
Vol 76 (9) ◽  
pp. 2494-2502 ◽  
Author(s):  
María Teresa Garza-González ◽  
Jonathan Eduardo Ramírez-Vázquez ◽  
María de los Ángeles García-Hernández ◽  
María Elena Cantú-Cárdenas ◽  
Adriana Liñan-Montes ◽  
...  
Keyword(s):  
Reduction Process ◽  
Cladosporium Cladosporioides ◽  
Total Chromium ◽  
Isothermal Model ◽  
Process Comparison ◽  
Chromium Vi ◽  
Before And After ◽  
Effects Of Ph ◽  
Pseudo Second Order ◽  
Adsorption Reduction

Abstract The capacity of Cladosporium cladosporioides biomass for removal of Cr(VI) in aqueous solutions was evaluated. A 2 × 2 factorial experiment design was used to study the effects of pH and biomass doses. Lower pH values and larger biomass doses increased the capacity of C. cladosporioides biomass for removal of Cr(VI), reaching a reduction capacity of 492.85 mg g−1, a significantly higher value compared to other biomass reported. Cr(VI) removal kinetic rates followed a pseudo-second order model, like other fungal biomass reported previously. The apparent adsorption process was described well by the Freundlich isothermal model. However, determination of total chromium indicated that adsorption of Cr(VI) was followed by a redox reaction that released proportional quantities of Cr(III) into the experimental supernatant, suggesting a parallel adsorption-reduction process. Comparison of Fourier transform infrared spectroscopy spectra of C. cladosporioides biomass before and after the reduction process demonstrated the involvement of positively charged amino groups in the Cr(VI) adsorption-reduction process.

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