scholarly journals Removal of Dyes from Aqueous Solution by Adsorption on Biomass of Mango (Mangifera Indica) Leaves

2010 ◽  
Vol 7 (3) ◽  
pp. 669-676 ◽  
Author(s):  
T. Murugan ◽  
A. Ganapathi ◽  
R. Valliappan
Keyword(s):  
Aqueous Solution ◽  
Mangifera Indica ◽  
Experimental Conditions ◽  
Freundlich Model ◽  
Experimental Parameters ◽  
Initial Ph ◽  
Adsorption Processes ◽  
Leaf Powder ◽  
Rate Kinetics ◽  
Mango Leaves

The potential feasibility of mango leaves powder (MLP) (Mangifera indica) for removal of dye (Grey BL) from aqueous solution was investigated. The effects of various experimental parameters were examined and optimal experimental conditions were decided. Above the value of initial pH 7, the dye studied could be removed effectively. The isothermal data fitted the Langmuir model or Freundlich model. The adsorption processes followed the pseudo-first-order rate kinetics. The results in this study indicated that mango leaf powder (MLP) was an attractive candidate for removing dye from dye wastewater.

scholarly journals Uptake of Cationic Dyes from Aqueous Solution by Biosorption Using Granulized AnnonasqumosaSeed

2009 ◽  
Vol 6 (4) ◽  
pp. 1260-1266 ◽  
Author(s):  
T. Santhi ◽  
S. Manonmani
Keyword(s):  
Aqueous Solution ◽  
Low Cost ◽  
Cationic Dyes ◽  
Dye Wastewater ◽  
Experimental Conditions ◽  
Freundlich Model ◽  
First Order ◽  
Experimental Parameters ◽  
Initial Ph ◽  
Rate Kinetics

A new, low cost, locally available biomaterial was tested for its ability to remove cationic dyes from aqueous solution. A sample of granulizedAnnona squmosaseeds had been utilized as a sorbent for uptake of three cationic dyes, methylene blue (MB), methylene red (MR) and malachite green (MG). The effects of various experimental parameters (e.g., contact time, dye concentration, adsorbent dose and pH) were investigated and optimal experimental conditions were ascertained. Above the value of initial pH 5, three dyes studied could be removed effectively. The isothermal data fitted the Langmuir model in the case of MB sorption and the Freundlich model for all three dyes sorption. The biosorption processes followed the pseudo first order rate kinetics. The results in this study indicated that granulizedAnnona squmosaseed was an attractive candidate for removing cationic dyes from the dye wastewater.

scholarly journals Uptake of Cationic Dyes from Aqueous Solution by Biosorption onto GranularMuntingia calabura

2009 ◽  
Vol 6 (3) ◽  
pp. 737-742 ◽  
Author(s):  
T. Santhi ◽  
S. Manonmani ◽  
S. Ravi
Keyword(s):  
Aqueous Solution ◽  
Low Cost ◽  
Freundlich Isotherm ◽  
Cationic Dyes ◽  
Isotherm Models ◽  
Experimental Conditions ◽  
Experimental Parameters ◽  
Initial Ph ◽  
Rate Kinetics ◽  
Muntingia Calabura

A new, low cost, locally available biomaterial was tested for its ability to remove cationic dyes from aqueous solution. A granule prepared from a mixture of leafs, fruits and twigs ofMuntingia calaburahad been utilized as a sorbent for uptake of three cationic dyes, methylene blue (MB), methylene red (MR) and malachite green (MG). The effects of various experimental parameters (e.g.,contact time, dye concentration, adsorbent dose and pH) were investigated and optimal experimental conditions were ascertained. Above the value of initial pH 6, three dyes studied could be removed effectively. The isothermal data fitted the Langmuir and Freundlich isotherm models for all three dyes sorption. The biosorption processes followed the pseudo-first order rate kinetics. The results in this study indicated thatMuntingia calaburawas an attractive candidate for removing cationic dyes from the dye wastewater.

Non-Linear Kinetic and Isotherm Modeling on the Adsorption of Lead (II) Ions from Aqueous Solution onto Monosodium Glutamate Functionalised Rubber Leaf Powder

2013 ◽  
Vol 594-595 ◽  
pp. 219-225 ◽  
Author(s):  
Faisal Fadzil ◽  
M.A.K.M. Hanafiah ◽  
Shariff Ibrahim
Keyword(s):  
Contact Time ◽  
Monosodium Glutamate ◽  
Sorption Process ◽  
Maximum Adsorption Capacity ◽  
Experimental Parameters ◽  
Initial Ph ◽  
Leaf Powder ◽  
Rate Kinetics ◽  
Langmuir Isotherm Model ◽  
Kinetic And Isotherm Modeling

In order to enhance its cationic sorption capacity, untreated rubber leaf powder (RLP) was functionalized using monosodium glutamate to produce potentially biodegradable cationic sorbent. The sorption behaviors of monosodium glutamate functionalised (MGRL) against Pb (II) in a batch system are investigated. The effects of various experimental parameters (e.g. initial pH, contact time) were investigated and the sorption kinetic was elucidated. The Pb (II) removal on MGRL increased as the initial pH increased. The effect of contact time revealed that the equilibrium is reached at 90 minutes. The Pb (II) sorption process on MGRL followed the pseudo-first-order rate kinetics. The Langmuir isotherm model with a maximum adsorption capacity of 109.953 mg/g was found suited to describe the adsorption process.

scholarly journals Adsorption of Cr(VI), Pb(II) Ions and Methylene Blue Dye from Aqueous Solution using Pristine and Modified Coral Limestone

2020 ◽  
Vol 32 (10) ◽  
pp. 2624-2632
Author(s):  
C.S. Nkutha ◽  
N.D. Shooto ◽  
E.B. Naidoo
Keyword(s):  
Aqueous Solution ◽  
Methylene Blue ◽  
Freundlich Isotherm ◽  
Blue Dye ◽  
Methylene Blue Dye ◽  
Sorption Behaviour ◽  
Freundlich Model ◽  
Experimental Parameters ◽  
Acid And Base ◽  
Modified Adsorbents

This work reports the feasibility of using pristine and chemically modified coral limestones by acid and base. Their potential adsorptive capabilities is probed by treatment of toxic Cr(VI), Pb(II) ions and methylene blue in aqueous solution under different experimental parameters by batch method. Parameters such as agitation time, concentration, temperature and pH were varied to understand the sorption behaviour of the adsorbents in each case. The adsorbents were characterized by SEM, XRD and FTIR. Morphological analysis by SEM micrographs show that the surface of all adsorbents was irregular in nature. XRD spectra confirmed the orthorhombic structure of aragonite in the pristine coral limestones (PCL), acid modified coral limestones (ACL) and base modified coral limestones (BCL). FTIR results affirmed the presence of (CO3 2-) and (-C=O) groups of the carbonate ions and Ca-O attachment to the surface of PCL and removal of CaCO3 characteristic peaks in ACL and BCL. However, in the modified adsorbents shifting of Ca-O peaks occurred. The recorded maximum adsorption capacities of PCL, ACL and BCL for Cr(VI) ions were 69.42, 65.04, 64.88 mg/g, Pb(II) ions 39.36, 74.11, 78.34 mg/g and methylene blue 37.24, 46.28, 46.39 mg/g, respectively. The uptake of Pb(II), Cr(VI) ions, methylene blue onto PCL fitted Freundlich model. Also the uptake of Cr(VI) ions and methylene blue onto ACL and BCL fitted Freundlich isotherm. However, uptake of Pb(II) ions onto both ACL and BCL fitted Langmuir isotherm. The data revealed that the adsorption of Pb(II) ions onto PCL and ACL and methylene blue dye onto PCL was exothermic. Whilst the adsorption of Cr(VI) ions onto PCL, ACL and BCL and methylene blue dye onto ACL and BCL were endothermic in nature, hence increasing the temperature would enhance the uptake of Pb(II) ions onto BCL, Cr(VI) ions onto ACL and BCL and methylene blue onto ACL and BCL. The obtained (ΔGº) values at all studied temperatures for the adsorption of Pb(II), Cr(VI) ions and methylene blue onto PLC, ACL and BCL indicated a spontaneous process.

scholarly journals Adsorption of Malachite Green by Jordanian Diatomite Ores: Equilibrium Study

2019 ◽  
Vol 2 (1) ◽  
pp. 92-99
Author(s):  
Emad El Qada
Keyword(s):  
Particle Size ◽  
Adsorption Process ◽  
Isotherm Models ◽  
Equilibrium Isotherm ◽  
Freundlich Model ◽  
Equilibrium Study ◽  
Liquid Phase Adsorption ◽  
Experimental Parameters ◽  
Optimum Ph ◽  
Adsorption Processes

The focal theme of this work is to assess the ability of Jordanian diatomite to treat MG-bearing effluents. Effects of several experimental parameters namely, particle size of diatomite, pH and initial MG concentration were investigated through liquid-phase adsorption processes. Several equilibrium isotherm models were applied. It was found that initial MG concentration, pH and particle size of diatomite had a significant effect on the adsorption process. MG uptake has increased from 99.3 mg/dm3 to 898.7 mg/dm3 over the whole concentration range. A high percentage of MG removal (99.6%) was achieved as the diatomite particle size decreased from 500-710μm to 125-250μm. The optimum pH for the removal of MG was=9. Freundlich model was satisfactorily applied to the experimental data.

Catalytic Degradation of Azo Dye Congo Red in Aqueous Solution by LiMn2O4

2013 ◽  
Vol 634-638 ◽  
pp. 500-503
Author(s):  
Yun Hui Long ◽  
Jun Ming Guo ◽  
Du Shu Huang ◽  
Gui Yang Liu
Keyword(s):  
Aqueous Solution ◽  
Congo Red ◽  
Azo Dye ◽  
Orthogonal Experiment ◽  
Catalytic Degradation ◽  
Spinel Limn2o4 ◽  
Experimental Conditions ◽  
Initial Ph ◽  
Degradation Of Azo Dye

Catalytic degradation of azo dye Congo red in aqueous solution by spinel LiMn2O4 was studied. Degradation conditions were also optimized by orthogonal experiment. The results showe that the optimal degradation experimental conditions are: The initial pH is 3.0; The amount of catalyst is 10.0 mg; The amount of 30% H2O2 is 2.00 mL. The decolourization ratio of 20 mL 20 mg/L Congo red solution is 85.95%.

Hypercrosslinked Polymers Preparation VS Methylene Blue Adsorption

2013 ◽  
Vol 743-744 ◽  
pp. 539-544
Author(s):  
Lin Xiu Zhao ◽  
Si Guo Yuan ◽  
Jiao Sha ◽  
Shao Bin Li
Keyword(s):  
Aqueous Solution ◽  
Methylene Blue ◽  
Reactive Dye ◽  
Freundlich Model ◽  
Polymeric Adsorbents ◽  
Bet Specific Surface Area ◽  
Adsorption Processes ◽  
Ft Ir ◽  
Polymer Adsorbent ◽  
Hypercrosslinked Polymers

In the study, two kinds of hypercrosslinked polymers were prepared by polymerization of dichloromethyl aryl monomer with benzene or itself. The chemical and pore structure of above polymers were characterized by FT-IR and BET. The results showed that these polymers possessed high BET specific surface area (up to 1000 m2/g) and large pore volumes (up to 1.2cm3/g). Two commercial polymer adsorbent (XAD-4, H103) and two new synthesized polymeric adsorbents (BE-XDC, CMB-CMB) have been used for the adsorption of reactive dye methylene blue (MB) from aqueous solution, and the static capacity followed an order as: CMB-CMB(142.77mg/g) > BE-XDC(104.61mg/g) > H103(71.01mg/g) > XAD-4(53.85mg/g). The Equilibrium adsorption data of the four polymeric adsorptions were obtained and fitted very well to Freundlich model. The adsorption equilibrium time of CMB-CMB, BE-XDC resin were less than 200min, which were faster than that of XAD-4, H103. The free energy changes, ΔG for adsorption of MB on the four polymeric adsorbents in the aqueous solution was evaluated. The negative values of ΔG indicated that the overall adsorption processes were spontaneous and thermodynamically favorable.

Equilibrium and Thermodynamic Studies on Biosorption of Dye from Aqueous Solution by PeniciIlium sp.

2011 ◽  
Vol 80-81 ◽  
pp. 678-682
Author(s):  
Li Fang Zhang ◽  
Ying Ying Chen ◽  
Shu Juan Dai
Keyword(s):  
Aqueous Solution ◽  
Freundlich Isotherm ◽  
Isotherm Models ◽  
Freundlich Model ◽  
Thermodynamic Studies ◽  
Biosorption Process ◽  
Optimum Ph ◽  
Initial Ph ◽  
Equilibrium Data ◽  
Increasing Temperature

In this study, biosorption of C. I. Acid Red 18 from aqueous solution was investigated by using acid treated biomass of Penicilium sp. in a batch system. The effects of initial pH, contact time, initial dye concentration and temperature on dye biosorption were investigated. Optimum pH for efficient dye biosorption was found to be 3.0 for acid treated biomass. The bosorption capacity was increased with the increasing temperature in studied temperature range. The Langmuir and Freundlich isotherm models were applied to experimental equilibrium data and the Langmuir model better described the equilibrium dye uptake than the Freundlich model. Thermodynamic studies revealed that the biosorption process was successful, spontaneous and endothermic in nature.

Removal of Cobalt (II) Ions from Aqueous Solution on Zinc(II) Ions Doping Chitosan/Hydroxyapatite Composite

2013 ◽  
Vol 22 (6) ◽  
pp. 096369351302200
Author(s):  
CunPing Liu
Keyword(s):  
Aqueous Solution ◽  
Precipitation Method ◽  
Batch Adsorption ◽  
Order Model ◽  
Isothermal Adsorption ◽  
Freundlich Model ◽  
X Ray ◽  
Hydroxyapatite Composite ◽  
Initial Ph ◽  
Pseudo Second Order

In the present investigation, bio-inorganic composite, which was synthesized with chitosan and hydroxyapatite by adding zinc(II) ions, have been prepared by precipitation method and was characterized by Fourier Transform infrared (FTIR) spectroscopy and energy dispersive X-ray analyzer (EDXA). Then, the composite was used for removal of Cobalt(II) from synthetic aqueous solution. The effects of initial pH, contact time, kinetic and isothermal adsorption were studied in detail using batch adsorption at different temperature. The results showed that Cobalt(II) ions can be efficiently removed and also demonstrated that the kinetic data were best described by the pseudo-second-order model (R2>0.99), While thermodynamic investigation of Cobalt(II) ions adsorption by zinc(II) doping Chitosan/hydroxyapatite (Zn-HAPCS) composite confirmed a spontaneous adsorption. Further investigations demonstrated that the adsorption pattern fitted well with Langmuir model (R2 > 0.99), but less-satisfied with Freundlich model (R2 < 0.95).

scholarly journals Adsorption of 3-Chloroaniline on Potato Skin in Aqueous Solution

2016 ◽  
Vol 2016 ◽  
pp. 1-7
Author(s):  
Nidhal S. Mohammed ◽  
T. H. Flowers ◽  
H. J. Duncan
Keyword(s):  
Aqueous Solution ◽  
Ionic Strength ◽  
Experimental Conditions ◽  
Freundlich Model ◽  
Fresh Potato ◽  
Adsorption Capacities ◽  
Equilibrium Data ◽  
Basic Solutions ◽  
Potato Skin ◽  
Ph Range

The adsorption behaviour of aromatic amine 3-chloroaniline (3-CA) from aqueous solution on fresh potato skin was investigated. A series of batch experiments were conducted under different experimental conditions of contact time, 3-chloroaniline concentration, weight of potato skin, pH, temperature, and ionic strength using RP-HPLC analysis. Adsorption equilibrium of 3-chloroaniline at concentration of 10 µg/mL on 1 g weight of chopped potato skin was achieved in 24 hours. Using different varieties of potato skin showed that the adsorption of 3-CA on Nicola variety is higher compared to Sante and Maris Peer varieties. Adsorption on potato skin was found to be generally higher compared to cortex and pith tissues. Analysis of adsorption isotherm shows that equilibrium data was fitted to Freundlich model (R2=0.977). Maximum adsorption capacities of 3-chloroaniline were found in the pH range from 3 to 9, whereas low adsorption quantities were found in high acidic and high basic solutions (pH 2 and pH 13, resp.). Adsorption capacity increased with an increase in temperature from 4°C to 30°C but decreased with further increase of temperature to 40°C. Testing the ionic strength showed that increasing the concentration of electrolyte reduces the adsorption efficiency. This study indicated that the fresh potato skin (without any treatment) is possible to use as a new adsorbent for removal of 3-chloroaniline from industrial waste water.

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