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.

Removal of Cr(VI) from Aqueous Solutions Using Clay from Calumbi Geological Formation, N. Sra. Socorro, SE State, Brazil

2018 ◽  
Vol 912 ◽  
pp. 1-6 ◽  
Author(s):  
J.C.T. Rezende ◽  
V.H.S. Ramos ◽  
H.A. Oliveira ◽  
Rosane Maria Pessoa Betânio Oliveira ◽  
E. Jesus
Keyword(s):  
Aqueous Solutions ◽  
Contact Time ◽  
Metal Removal ◽  
Heavy Metal Removal ◽  
Maximum Adsorption Capacity ◽  
X Ray Diffraction ◽  
X Ray ◽  
Initial Ph ◽  
Geological Formation ◽  
Langmuir Isotherm Model

Conventional processes for heavy metal removal are costly. Natural and modified clay with quaternary ammonium salt were used as adsorbent for the removal of Cr (VI) from aqueous solutions. Clays were characterized using Fourier transform infrared spectroscopy FTIR, thermal analysis (TG/DTA) and X-ray diffraction (XRD). Cr (VI) determination was conducted by ultraviolet-visible spectrophotometry, using complexation with 1,5-diphenylcarbazide. Absorbance was measured at the wavelength of 540 nm. The experiments were conducted at 25 ± 1 °C; initial Cr (VI) concentration of 4 to 25 mg L-1; initial pH of 2, agitation of 150 rpm; contact time of 120 minutes and clay mass of 0.1 g. Natural and modified clays exhibited a maximum adsorption capacity of 2.548 mg g-1 and 17.24 mg g-1, respectively, in accordance with the Langmuir isotherm model. X-ray diffraction analysis of clay indicated that the sample consists mainly of kaolinite and montmorillonite.

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 Biosorption of Lead Ions from Aqueous Solution UsingFicus benghalensisL.

2013 ◽  
Vol 2013 ◽  
pp. 1-8 ◽  
Author(s):  
Venkateswara Rao Surisetty ◽  
Janusz Kozinski ◽  
L. Rao Nageswara
Keyword(s):  
Aqueous Solution ◽  
Process Parameters ◽  
Contact Time ◽  
Batch Process ◽  
Ion Concentration ◽  
Lead Ions ◽  
Lead Ion ◽  
Maximum Adsorption Capacity ◽  
Ficus Benghalensis ◽  
Leaf Powder

Ficus benghalensisL., a plant-based material leaf powder, is used as an adsorbent for the removal of lead ions from aqueous solution using the biosorption technique. The effects of process parameters such as contact time, adsorbent size and dosage, initial lead ion concentration, and pH of the aqueous solution on bio-sorption of lead byFicus benghalensisL. were studied using batch process. The Langmuir isotherm was more suitable for biosorption followed by Freundlich and Temkin isotherms with a maximum adsorption capacity of 28.63 mg/g of lead ion on the biomass ofFicus benghalensisL. leaves.

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.

scholarly journals Biosorption of Pb(II) by Bacillus badius AK strain originating from rotary drum compost of water hyacinth

2016 ◽  
Vol 75 (5) ◽  
pp. 1071-1083 ◽  
Author(s):  
Isha Vishan ◽  
Avishek Laha ◽  
Ajay Kalamdhad
Keyword(s):  
Water Hyacinth ◽  
Contact Time ◽  
Bacterial Biomass ◽  
Initial Ph ◽  
Rate Kinetics ◽  
Pseudo Second Order ◽  
Rotary Drum ◽  
Bacterium Bacillus ◽  
Biomass Dosage

The presence of heavy metals in the environment due to industrial activities is of serious concern because of their toxic behaviour towards humans and other forms of life. Biosorption of Pb(II) using dry bacterial biomass of Bacillus badius AK, previously isolated from water hyacinth compost, has been undertaken in batch system. The optimum conditions of biosorption were determined by investigating the initial pH, contact time, initial biomass dosage at constant temperature of 40 °C, initial metal concentration of 100 mg/L and rotational speed of 150 rpm. The optimum pH was found to be 5 and equilibrium contact time was 2.5 h. The maximum biosorption capacity of Pb(II) on Bacillus badius AK was 138.8 mg/g at an initial concentration of 100 mg/L. A kinetics study revealed that the adsorption process followed pseudo second order rate kinetics. The experimental data were fitted to the Langmuir isotherm. Characterization of the biomass indicated the presence of several functional groups. The results indicated that the bacterium Bacillus badius AK is efficient for the removal of Pb(II).

Characteristics of Cu2+ Adsorption by Modified Rice Straw

2013 ◽  
Vol 726-731 ◽  
pp. 2622-2628
Author(s):  
Ming Da Liu ◽  
Lei Guo ◽  
Jun Yang ◽  
Yao Jing Wang
Keyword(s):  
Rice Straw ◽  
Ph Value ◽  
Removal Rate ◽  
Maximum Adsorption Capacity ◽  
Static State ◽  
Metal Biosorption ◽  
Initial Ph ◽  
Langmuir Isotherm Model ◽  
Pseudo Second Order ◽  
Sorption Time

In this paper, modified rice straw was investigated for its Cu2+removal ability from aqueous solution. The effects of environmental factors on metal biosorption were studied under static state, including initial concentration of metal ions, sorption time, initial pH value and adsordent dosage. In addition, the relevant equilibrium, kinetics were discussed. The results showed that the rice straw which was modified by NaOH had been improved greatly in its Cu2+removal ability. The rice straw had good effects on adsorption of low concentration of Cu2+solution. The adsorption data fit Langmuir isotherm model well, the maximum adsorption capacity for Cu2+reached 8.48 mg·g-1. The adsorption of Cu2+on the modified rice straw was a very rapid process, the kinetics fit a pseudo-second-order equation well. The pH value had prominent effect on the removal rate of Cu2+, adsorption efficient could reach over 92% when pH value was between 5 and 6.5. With increasing adsordent dosage, the removal rate of Cu2+increased.

scholarly journals A Mineral By-Product from Gasification of Poultry Feathers for Removing Cd from Highly Contaminated Synthetic Wastewater

Minerals ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 1048
Author(s):  
Zygmunt Mariusz Gusiatin ◽  
Jurate Kumpiene ◽  
Sylwia Janiszewska ◽  
Sławomir Kasiński ◽  
Mariusz Pecio ◽  
...  
Keyword(s):  
Contact Time ◽  
Synthetic Wastewater ◽  
Maximum Adsorption Capacity ◽  
Operational Conditions ◽  
Surface Precipitation ◽  
Initial Ph ◽  
Mineral Components ◽  
High Concentrations ◽  
Poultry Feather ◽  
Cd Removal

Ash from poultry feather gasification was investigated as an adsorbent for Cd removal from synthetic wastewater under a range of operational conditions: initial pH (2–8) and salinity (8–38 mS/cm) of wastewater, ash dosage (2.5–50 g/L), Cd concentration (25–800 mg/L) and contact time (5–720 min). The ash was highly alkaline and had low surface area and micropores averaging 1.12 nm in diameter. Chemical/mineralogical analysis revealed a high content of P2O5 (39.9 wt %) and CaO (35.5 wt %), and the presence of calcium phosphate, hydroxyapatite and calcium. It contained only trace amounts of heavy metals, BTEX, PAHs and PCBs, making it a safe mineral by-product. Cd adsorption was described best with Langmuir and pseudo-second order models. At pH 5, an ash dosage of 5 g/L, 40 min contact time and 100 mg Cd/L, 99% of Cd was removed from wastewater. The salinity did not affect Cd sorption. The maximum adsorption capacity of Cd was very high (126.6 mg/g). Surface precipitation was the main mechanism of Cd removal, possibly accompanied by ion exchange between Cd and Ca, coprecipitation of Cd with Ca-mineral components and Cd complexation with phosphate surface sites. Poultry ash effectively removes high concentrations of toxic Cd from wastewater.

scholarly journals KINETIC AND ISOTHERM STUDY OF CUPPER ADSORPTION FROM AQUEOUS SOLUTION USING WASTE EGGSHELL

2014 ◽  
Vol 22 (2) ◽  
pp. 132-140 ◽  
Author(s):  
Ayben Polat ◽  
Sukru Aslan
Keyword(s):  
Ph Value ◽  
Experimental System ◽  
Second Order ◽  
Maximum Adsorption Capacity ◽  
Order Kinetic ◽  
Isotherm Study ◽  
Initial Ph ◽  
Order Kinetic Model ◽  
Langmuir Isotherm Model ◽  
Pseudo Second Order

The sorption of Cu2+ ions from aqueous solutions by eggshell was investigated in a batch experimental system with respect to the temperature, initial Cu2+ concentrations, pH, and biosorbent doses. The adsorption equilibrium was well described by the Langmuir isotherm model with the maximum adsorption capacity of 5.05 mg Cu2+/g eggshell at 25 °C. The value of qe increased with increasing the temperature while also increases the release of Ca2+ and HCO−3 ions from the eggshell. The highest sorption of Cu onto the waste eggshell was determined at the initial pH value of 4.0. The results confirming that the adsorption reaction of Cu2+ on the eggshell was thought to be endothermic. A comparison of the kinetic models such as pseudo first and second-order kinetics, intraparticle diffusion, and Elovich on the sorption rate demonstrated that the system was best described by the pseudo second-order kinetic model.

scholarly journals Optimizing the Biosorption Behavior of Ludwigia stolonifera in the Removal of Lead and Chromium Metal Ions from Synthetic Wastewater

2021 ◽  
Vol 13 (11) ◽  
pp. 6390
Author(s):  
Yasser A. El-Amier ◽  
Ashraf Elsayed ◽  
Mohamed A. El-Esawi ◽  
Ahmed Noureldeen ◽  
Hadeer Darwish ◽  
...  
Keyword(s):  
Experimental Data ◽  
Metal Ions ◽  
Contact Time ◽  
Static Condition ◽  
Sorption Process ◽  
Ion Concentration ◽  
Synthetic Wastewater ◽  
Maximum Adsorption Capacity ◽  
Order Kinetic ◽  
Batch Mode

In this study, a natural low-coast, efficient, and eco- bio-sorbent plant material (Ludwigia stolonifera), with both parts of the root and shoot, were studied for the removal of the cationic metal ions, lead Pb2+ and chromium Cr6+, via batch mode experiments to evaluate their maximum adsorption capacity, and held a comparison between the used bio-sorbent roots and shoots, based on the highest bio-sorption potential. Optimization of the bio-sorption parameters, such as contact time, pH, bio-sorbent (root and shoot) dosage, and initial ion concentration was conducted. The results indicated that 1.6 g of the used bio-sorbent shoot material removed 81.4% of Pb2+, and 77% of Cr6+ metal ions from liquid media under the conditions of 100 ppm of initial metal ions concentration at room temperature for 60 min of contact time with the static condition. Different isotherms and kinetic models were fit to the experimental data to understand the nature of the bio-sorption process. The experimental data were best fit by the pseudo-second-order kinetic model with a high correlation coefficient (R2 = 0.999), which reveals the chemisorption nature of the bio-sorption process. The chemical and structural analysis of the used bio-sorbent, before and after Cr6+ and Pb2+ bio-sorption, were performed using different techniques of characterization, such as Scanning Electron Microscopy (SEM) and Fourier-transform infrared spectroscopy (FTIR). The used bio-sorbent proved to be a low-cost, efficient, and eco-friendly material to remove heavy metal ions from aqueous solutions.

scholarly journals Application of new biosorbent based on chemicaly modified Lagenaria vulgaris shell for the removal of copper(II) from aqueous solutions: Effects of operational parameters

2013 ◽  
Vol 67 (4) ◽  
pp. 559-567 ◽  
Author(s):  
Milos Kostic ◽  
Miljana Radovic ◽  
Jelena Mitrovic ◽  
Danijela Bojic ◽  
Dragan Milenkovic ◽  
...  
Keyword(s):  
Removal Efficiency ◽  
Low Cost ◽  
Batch Process ◽  
Maximum Adsorption Capacity ◽  
Operational Parameters ◽  
Initial Ph ◽  
Langmuir Isotherm Model ◽  
Pseudo Second Order ◽  
Process Mode ◽  
Lagenaria Vulgaris

In present study a low cost biosorbent derived from Lagenaria vulgaris plant by xanthation, was tested for its ability to remove copper from aqueous solution. The effect of contact time, initial pH, initial concentration of copper(II) ions and adsorbent dosage on the removal efficiency were studied in a batch process mode. The optimal pH for investigated metal was 5. A dosage of 4 g dm-3 of xanthated Lagenaria vulgaris biosorbent (xLVB) was found to be effective for maximum uptake of copper(II). The kinetic of sorption of metal was fast, reaching at equilibrium in 50 min. The kinetic data were found to follow closely the pseudo-second-order model. The adsorption equilibrium was described well by the Langmuir isotherm model with maximum adsorption capacity of 23.18 mg g-1 copper(II) ions on xLVB. The presence of sulfur groups on xLVB were identified by FTIR spectroscopic study. Copper removal efficiency was achieved at 81.35% from copper plating industry wastevater.

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