Optimization Study of Adsorption Parameter for Removal of Dye Pollutant Using Candle Soot Coated Egg Carton

Abstract In this study, several parameters that affect the adsorption capacity of Rhodamine B (RhB) dyes were reviewed which include initial pH, temperature, contact time and initial dye concentration. Experimental data was extracted from other literatures as input for subsequent optimization study. Design Expert version 11.1.2.0 software was used to find the optimal condition for adsorption of RhB dyes from wastewater by using candle soot coated on egg carton (CS-Egg) as absorbent. The Central Composite Design (CCD) in response surface methodology (RSM) was employed to perform the optimization and analysis process as it was effective in determining the optimal condition for the adsorption process. CCD evaluated many parameters at the same time and thus reducing the number of experiments required. The optimum condition to maximize the adsorption efficiency was obtained at pH 7, 262.5 mg/L, 60 min of contact time and 55 °C. The highest predicted adsorption efficiency of RhB dye was 90 % at optimum condition. The optimization of parameter provides a better understanding on the adsorption efficiency before conducting the actual experimental work.

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Adsorption of Th(IV) on the modified multi-walled carbon nanotubes using central composite design

Radiochimica Acta ◽

10.1515/ract-2018-3036 ◽

2019 ◽

Vol 107 (5) ◽

pp. 377-386 ◽

Cited By ~ 1

Author(s):

Cansu Endes Yılmaz ◽

Mahmoud A.A. Aslani ◽

Ceren Kütahyalı Aslani

Keyword(s):

Carbon Nanotubes ◽

Central Composite Design ◽

Contact Time ◽

Adsorption Process ◽

Freundlich Isotherm ◽

Thorium Concentration ◽

Multi Walled Carbon Nanotubes ◽

Pseudo Second Order ◽

Walled Carbon Nanotubes ◽

Central Composite

Abstract Adsorption of thorium onto nitric acid modified multi-walled carbon nanotubes was investigated by central composite design as a function of contact time, pH, initial thorium concentration and temperature. The results showed that optimum uptake capacity was 65.75±2.23 mg·g−1 with respect to pH=4, initial thorium concentration of 100 mg·L−1, 25 °C and 15 min contact time. Thermodynamic parameters [standard enthalpy (ΔH0), entropy (ΔS0), and free energy (ΔG0)] were calculated, and the results indicated that adsorption was endothermic. Langmuir, Freundlich and Dubinin-Radushkevich isotherms have been investigated in order to characterize the adsorption process in the range of 25–100 mg·L−1 initial thorium concentration. The Freundlich isotherm is the best suited as a model because it has the highest correlation coefficient (R2=0.9485). The pseudo-second order kinetics well defined the adsorption process.

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EFISIENSI PENYERAPAN LOGAM Pb2+ DENGAN MENGGUNAKAN CAMPURAN BENTONIT DAN ENCENG GONDOK

Jurnal Teknik Kimia USU ◽

10.32734/jtk.v4i1.1455 ◽

2015 ◽

Vol 4 (1) ◽

pp. 20-24 ◽

Cited By ~ 1

Author(s):

M. Faisal

Keyword(s):

Water Hyacinth ◽

Contact Time ◽

Adsorption Process ◽

Adsorption Efficiency ◽

Adsorption Ability ◽

Adsorption Time

Adsorption of Pb2+by using a mix of bentonite and water hyacinth has been carried out in a bacth system. The purpose of the research is to investigate the abilty of the mix bentonite and water hyacinth to adsorp Pb2+. Prior to adsorption process, the mix of bentonite and water hyacnth was activated physcally by H2SO4. The adsorption ability between activated-adsorbend and without activated-adsorbend was then compared. In the activaved process, the mix of bentonite and water hyacinth used was 4 gram in weight and 120 ml of H2SO4 1,2 M. In this research, adsorption time of 30, 60, 120 menit, the speed of 50, 100, 150 rpm and the Pb2+concentration of 30, 35 and 40 mg/l were used. The result showed that the adsorption efficiency of activated-adsorbend is higher than that of without activaved. The maximum adsorption of 0,987 mg/g were obtained at Pb2+concentration of 40 mg/l with a contact time and speed of 120 min and 150 rpm, respetively.

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Desorption of Mercury Complex from Fe-Modified Montmorillonite Adsorbent Membrane

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.814.451 ◽

2019 ◽

Vol 814 ◽

pp. 451-456 ◽

Cited By ~ 1

Author(s):

Marjorie Jane Lodo ◽

Leslie Joy L. Diaz

Keyword(s):

Contact Time ◽

Environmental Remediation ◽

Adsorption Process ◽

Batch Adsorption ◽

Adsorption Efficiency ◽

Sem Images ◽

Modified Montmorillonite ◽

Subsequent Elution ◽

Mining Wastewater ◽

Cyanide Solutions

With the use of nanotechnology, clay minerals, specifically montmorillonites, have been reengineered to be used in environmental remediation, especially in the treatment of mining wastewater containing hazardous heavy metal ions. The objective of this study is to assess the practicality of using iron-modified montmorillonite (Fe-MMT) nanomembranes in the removal of mercury using the adsorption process. The nanomembranes, which were synthesized via electrospinning, were subjected to mercury cyanide solutions during the batch adsorption set ups to determine the adsorption efficiency. During the subsequent elution tests, three factors– eluent type (CH3COOH and C6H807), eluent concentration (0.01 M and 0.05 M) and contact time (3 and 5 hours) – were tested. SEM images of the mats were acquired to study the structure of the adsorbent. HD XRF analysis was done to identify the ions present in the membrane, as well as the initial Hg concentrations, amount of remaining Hg in the wastewater after batch adsorption and amount of desorbed metal. Results showed that using the Fe-MMT nanomembrane as adsorbent material resulted to 61.74% removal of Hg in the mercury cyanide solutions with initial concentrations of 13.87 to 38.9 mg L-1. Acetic acid exhibited better desorption results, with the highest efficiency of 31.36% (0.01 M, 5 h) compared to citric acid’s 7.40% (0.05M, 3 h).

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Optimization of multiple parameters of coking wastewater (CWW): catalytic thermolysis (CT) at high pressure reactor (HPR)

International Journal of Chemical Reactor Engineering ◽

10.1515/ijcre-2019-0221 ◽

2020 ◽

Vol 18 (4) ◽

Author(s):

Vibha Verma ◽

Parmesh Kumar Chaudhari ◽

Bidyut Mazumdar

Keyword(s):

High Pressure ◽

Adsorption Process ◽

Treatment Time ◽

Mass Loading ◽

Initial Value ◽

First Order ◽

Multiple Parameters ◽

Second Stage ◽

Initial Ph ◽

Central Composite

AbstractPresent study deals with the treatment of coking waste water (CWW) for the reduction of pollutants COD, phenol and cyanide using catalytic thermolysis (CT). For screening of catalyst and optimization of pH the CT was performed at 100 °C, pH = 3–11 using catalyst mass loading Cw = 3 g/L. In this study Cu (NO3)2 gave best performance. Further, CT was carried out using Cu (NO3)2 catalyst in high pressure reactor (HPR). The investigated parameters range were initial pH (pHi) = 3–11, Cw = 1–5 g/L, temperature (T) = 100–160 °C and treatment time (tR) = 6 h. The maximum percentage reduction for COD, phenol and cyanide were 83.33, 80.57 and 97.61%, respectively at pH = 9, Cw = 4 g/L, T = 140 °C and tR = 6 h. The CT did not give complete reduction of pollutant; therefore it was further treated using adsorption process as second stage treatment. The initial value of COD = 610 mg/L, phenol = 70.58 mg/L and cyanide = 0.45 mg/L were further reduced to 98.85, 100.00 and 55.55%, respectively, when adsorption process was performed at pH = 9, adsorbents dose Aw = 4 g/L, tR = 2 h. The response surface methodology (RSM) was performed through central composite design (CCD) for the designing of experiments and optimization of both the process. The kinetics studies of CT at HPR showed first order with respect to COD and phenol, and 0.24–0.608 order with respect to CW.

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Adsorption of Chromium(VI) on Radiation Grafted N,N-dimethylaminoethylmethacrylate onto Polypropylene, from Aqueous Solutions

Journal of the Mexican Chemical Society ◽

10.29356/jmcs.v57i2.216 ◽

2017 ◽

Vol 57 (2) ◽

Author(s):

Guillermina Burillo ◽

Juan Serrano-Gómez ◽

Juan Bonifacio-Martínez

Keyword(s):

Contact Time ◽

Metal Ion ◽

Adsorption Process ◽

Maximum Adsorption Capacity ◽

Ion Adsorption ◽

Initial Concentration ◽

Chromium Vi ◽

Adsorption Data ◽

Initial Ph ◽

Chromium Adsorption

Polypropylene (PP) grafted with dimethylaminoethylmethacrylate (DMAEMA), was prepared by irradiation with a 60Co γ source. The obtained PP-g-DMAEMA was used to study the Cr(VI) ion adsorption as a function of contact time, initial pH, initial concentration of metal ion and temperature. Chromium adsorption data on PP-g-DMAEMA at various initial concentration fit well the Freundlich and Langmuir isotherms. The maximum adsorption capacity (amax) was found to be 0.3103 × 0-4 mol g-1. The thermodynamic parameters ΔH0, ΔG0 and ΔS0 were estimated showing the adsorption process to be exothermic and spontaneous.

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Optimized Sorption of Methyl Orange using Functionalized Carob Plant Pod

Journal of Chemical Society of Nigeria ◽

10.46602/jcsn.v45i6.550 ◽

2020 ◽

Vol 45 (6) ◽

Author(s):

K. A. ABDULSALAM ◽

B. H. Amodu ◽

O. K. Fakorede ◽

J. M. Adelowo ◽

A. P. Onifade ◽

...

Keyword(s):

Contact Time ◽

Industrial Wastewater ◽

Adsorption Process ◽

Dye Adsorption ◽

Operational Parameters ◽

Colour Removal ◽

Adsorbent Dosage ◽

Percentage Removal ◽

Central Composite ◽

Maximum Decolorization

One of the most problematic groups of water pollutants is dye, a main constituent of textile industrial wastewater, which is carcinogenic. Therefore, this research delved into adsorption of dyes from textiles and wastewater using acid-treated as an adsorbent. The adsorbent was prepared by functionalizing the pod of carob with concentrated H3PO4. The effects of operational parameters such as adsorbent dosage, contact time, initial concentration of dye and temperature were studied and optimized using central composite design of design of experiment (DOE). The effects of process parameters (contact time, concentration, adsorbent dosage and temperature) on the dye adsorption were determined and optimized. It was observed that the colour removal efficiency increased with an increase in adsorbent mass and contact time. The adsorption process is endothermic as the percentage removal increases with temperature. The optimum contact time, concentration, adsorbent dosage and temperature were found to be 60oC, 9.74hr, 10ppm, and 5g respectively for the maximum decolorization.

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Al (III) removal from wastewaters by natural clay and coconut shell

Global NEST Journal ◽

10.30955/gnj.002566 ◽

2019 ◽

Keyword(s):

Aqueous Solutions ◽

Contact Time ◽

Acid Treatment ◽

Adsorption Process ◽

Coconut Shell ◽

Maximum Adsorption Capacity ◽

Agitation Rate ◽

Batch Experiments ◽

Natural Clay ◽

Initial Ph

This paper describes the adsorption of Al3+ ions from aqueous solutions, by natural clay (from Sakarya's Yenigün district) and coconut shell modified by means of acid treatment. Batch experiments were carried out to determine the effect of various factors such as initial pH (4-9), temperature (20, 40, 70 oC), initial concentration (10 to 200 mg L-1) and contact time (1-120 minute) on the adsorption process. The adsorption experiments were performed at a temperature of 20 ±2 oC), at 200 rpm agitation rate, with an adsorbent level of 1 g L-1, produced 98.95% (at pH 6) and 92.83% (at pH 7) maximum Al3+ removal efficiency for clay and coconut shell based adsorbents respectively. Furthermore, the process was found to be exothermic for clay and endothermic for coconut. XRF and XRD analyses of the clay variety used in adsorption analyses revealed it to be saponite clay, within the larger group of smectite clay minerals. The application of Langmuir revealed maximum adsorption capacity of 149.25 mg g-1 for natural clay adsorbent (NCA), and 120.482 mg g-1 for coconut shell adsorbent (CSA). Moreover, adsorption kinetics were found to be consistent with the second order kinetics (R2 > 0.95). The result shows that, natural clay and coconut shell adsorbents are effective adsorbents to remove Al3+ from aqueous solutions with good adsorption rate (>92.8%).

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Adsorption of Some Alephatic Dicarboxylic Acids on Zinc Oxide: A kinetic and Thermodynamic Study

Baghdad Science Journal ◽

10.21123/bsj.2019.16.4.0892 ◽

2019 ◽

Vol 16 (4) ◽

pp. 0892

Author(s):

Saddam M. Al-Mahmoud

Keyword(s):

Zinc Oxide ◽

Aqueous Solutions ◽

Contact Time ◽

Adsorption Process ◽

Dicarboxylic Acids ◽

Second Order ◽

Oxide Surface ◽

Adsorption Efficiency ◽

Good Ability ◽

Pseudo Second Order

The adsorption of Malonic acid, Succinic acid, Adipic acid, and Azelaic acid from their aqueous solutions on zinc oxide surface were investigated. The adsorption efficiency was investigated using various factors such as adsorbent amount, contact time, initial concentration, and temperature. Optimum conditions for acids removal from its aqueous solutions were found to be adsorbent dose (0.2 g), equilibrium contact time (40 minutes), initial acids concentration (0.005 M). Variation of temperature as a function of adsorption efficiency showed that increasing the temperature would result in decreasing the adsorption ability. Kinetic modeling by applying the pseudo-second order model can provide a better fit of the data with a greater correlation coefficient, which indicates that the adsorption process follow the pseudo-second order kinetics. The negative values of Gibbs free energy and the enthalpy change confirm the spontaneous and exothermic nature of the adsorption process. A good ability of zinc oxide to remove aliphatic dicarboxylic acids from its aqueous solutions has been found, and the chain length of the acids has no significant effect on its adsorption.

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Removal of sunset yellow FCF from aqueous solution using polyethyleneimine-modified MWCNTs

Water Science & Technology ◽

10.2166/wst.2015.601 ◽

2015 ◽

Vol 73 (6) ◽

pp. 1269-1278 ◽

Cited By ~ 2

Author(s):

Hejun Gao ◽

Luanluan Zhang ◽

Yunwen Liao

Keyword(s):

Adsorption Capacity ◽

Contact Time ◽

Adsorption Mechanism ◽

Adsorption Process ◽

Langmuir Model ◽

Order Model ◽

Sunset Yellow ◽

Multi Wall Carbon Nanotubes ◽

Initial Ph ◽

Pseudo Second Order

A novel adsorbent consisting of polyethyleneimine-modified multi-wall carbon nanotubes (PEI-MWCNTs) was synthesized by grafting PEI on the carboxyl MWCNTs. The surface properties of the PEI-MWCNTs were measured by scanning electron microscopy, thermogravimetric analysis, Fourier transform infrared, and zeta potential. The adsorption behavior of the PEI-MWCNTs was investigated using sunset yellow FCF as adsorbate. The effects of dosage of adsorbent, the initial pH of solution, contact time and temperature on the adsorption capacity were studied. Then, the kinetics and thermodynamics of the adsorption process were further investigated. Experimental results showed that the adsorption kinetics fitted a pseudo-second-order model and the adsorption isotherms agreed well with the Langmuir model. The adsorption process occurred very fast and the adsorption capacity of PEI-MWCNTs was much higher than that of many of the previously reported adsorbents. Additionally, the plausible adsorption mechanism was discussed.

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Sorption of Sr-85 and Am-241 from liquid radioactive wastes by alginate beads

Nukleonika ◽

10.1515/nuka-2015-0155 ◽

2015 ◽

Vol 60 (4) ◽

pp. 927-931 ◽

Cited By ~ 3

Author(s):

Agata Oszczak ◽

Leon Fuks

Keyword(s):

Contact Time ◽

Adsorption Process ◽

Decontamination Factor ◽

Alginate Beads ◽

Radioactive Wastes ◽

Batch Experiments ◽

Optimum Conditions ◽

Liquid Radioactive Wastes ◽

Initial Aqueous Solution ◽

Initial Ph

Abstract The paper reports the adsorption of strontium(II) and americium(III) from aqueous solutions onto calcium alginate (CaA), barium alginate (BaA) and strontium alginate (SrA) beads. Adsorption process was studied in batch experiments as a function of the initial pH of the solution and the contact time. All sorbents were examined by the termogravimetric analysis (TG). Laboratory obtained spherical beads of CaA, BaA and SrA seem to be good metal sorbents from liquid radioactive wastes. A contact time of about 4 h and neutral pH of the initial aqueous solution have been proposed to be optimum conditions for Sr-85 and Am-241 removal from the contaminated solutions using alginate sorbents. Laboratory obtained beads of CaA, BaA and SrA are characterized by the decontamination factor (DF) equal to 85% for Sr(II) and 90% for Am(III).

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