Chemically Modified Lagenaria vulgaris as a Biosorbent for the Removal of CuII from Water

2013 ◽  
Vol 66 (2) ◽  
pp. 227 ◽  
Author(s):  
Maja N. Stanković ◽  
Nenad S. Krstić ◽  
Ian J. Slipper ◽  
Jelena Z. Mitrović ◽  
Miljana D. Radović ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Metal Ion ◽  
Sorption Process ◽  
Ion Concentration ◽  
Linear Regression Method ◽  
Order Kinetic ◽  
Maximum Sorption Capacity ◽  
Chemically Modified ◽  
Biomass Dosage ◽  
Lagenaria Vulgaris

The ability of a biosorbent based on a chemically modified Lagenaria vulgaris shell for CuII ion removal from aqueous solution was studied in batch conditions. The biosorbent was characterized by Fourier-transform infrared spectroscopy and the effect of relevant parameters such as contact time, pH, biomass dosage, and initial metal ion concentration was evaluated. The sorption process was found to be fast, attaining equilibrium within 40 min, and results were found to be best fitted by a pseudo-second order kinetic model. Experimental data showed that the biosorption is highly pH dependent, and the optimal pH was 5.0. Results were analyzed in terms of the following adsorption isotherms: Langmuir, Freundlich, Temkin, and Flory–Huggins, by a linear regression method. The CuII biosorption followed the Langmuir isotherm model (r2 = 0.998) with the maximum sorption capacity of 14.95 mg g–1. The methyl-sulfonated Lagenaria vulgaris biomass investigated in this study exhibited a high potential for the removal of CuII from aqueous solution.

scholarly journals Isothermal, kinetics and thermodynamics studies of the biosorption of Pb(II) ion from aqueous solution using the scale of croaker fish (Genyonemus lineatus)

2013 ◽  
Vol 3 (3) ◽  
pp. 239-248
Author(s):  
Mojisola O. Nkiko ◽  
Abideen I. Adeogun ◽  
N. A. Adesola Babarinde ◽  
Oluwabunmi J. Sharaibi
Keyword(s):  
Aqueous Solution ◽  
Metal Ion ◽  
Sorption Process ◽  
Ion Concentration ◽  
Isothermal Kinetics ◽  
Fish Scale ◽  
Biosorption Process ◽  
Equilibrium Data ◽  
Pseudo Second Order ◽  
Biomass Dosage

Biosorbent prepared from the scale of croaker fish (Genyonemus lineatus) has been used for the removal of Pb(II) ion from aqueous solution in a batch system. The effects of some important parameters such as pH, initial metal concentration, temperature and biosorbent dosage on biosorption capacity were investigated. Equilibrium time for the biosorption process is 20 and 30 min at lower and higher concentrations, respectively. The process at 28 °C is in agreement with a pseudo-second-order kinetics model. The equilibrium data obeyed the Langmuir adsorption isotherm with a maximum monolayer adsorption capacity of 14.58 mg g−1. The study showed that the sorption process depends on biomass dosage, temperature, pH and initial metal ion concentration. The calculated thermodynamics parameters (ΔGo, ΔHo and ΔSo) indicated that the biosorption of the metal ion onto fish scale is feasible, spontaneous and exothermic in nature.

Sorption studies of Cr(VI) from aqueous solution using bio-char as an adsorbent

2014 ◽  
Vol 69 (11) ◽  
pp. 2265-2271 ◽  
Author(s):  
A. H. M. G. Hyder ◽  
Shamim A. Begum ◽  
Nosa O. Egiebor
Keyword(s):  
Aqueous Solution ◽  
Low Cost ◽  
Treatment Plant ◽  
Sorption Process ◽  
Sorption Kinetics ◽  
Synthetic Wastewater ◽  
Order Kinetic ◽  
Water And Wastewater Treatment ◽  
Maximum Sorption Capacity ◽  
Kinetics And Isotherms

The characteristics of sorption of hexavalent chromium (Cr(VI)) onto bio-char derived from wood chips (spruce, pine, and fir) were evaluated as a function of pH, initial Cr(VI) concentration and bio-char dosage using synthetic wastewater in batch tests. The initial Cr(VI) concentrations were varied between 10 and 500 mg/L to investigate equilibrium, kinetics, and isotherms of the sorption process. About 100% of Cr(VI) was removed at pH 2 with initial Cr(VI) concentration of 10 mg/L using 4 g of bio-char after 5 hours of sorption reaction. The maximum sorption capacity of the bio-char was 1.717 mg/g for an initial Cr(VI) concentration of 500 mg/L after 5 hours. The sorption kinetics of total Cr onto bio-char followed the second-order kinetic model. The Langmuir isotherm model provided the best fit for total Cr sorption onto bio-char. The bio-char used is a co-product of a down draft gasifier that uses the derived syngas to produce electricity. Bio-char as a low cost adsorbent demonstrated promising results for removal of Cr(VI) from aqueous solution. The findings of this study would be useful in designing a filtration unit with bio-char in a full-scale water and wastewater treatment plant for the Cr(VI) removal from contaminated waters.

scholarly journals Phragmites karkaas a Biosorbent for the Removal of Mercury Metal Ions from Aqueous Solution: Effect of Modification

2015 ◽  
Vol 2015 ◽  
pp. 1-12 ◽  
Author(s):  
Muhammad Hamid Raza ◽  
Aqsa Sadiq ◽  
Umar Farooq ◽  
Makshoof Athar ◽  
Tajamal Hussain ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Metal Ion ◽  
Freundlich Isotherm ◽  
Agitation Speed ◽  
Second Order ◽  
Ion Concentration ◽  
Order Kinetic ◽  
Order Kinetic Model ◽  
Pseudo Second Order ◽  
Phragmites Karka

Batch scale studies for the adsorption potential of novel biosorbentPhragmites karka(Trin), in its natural and treated forms, were performed for removal of mercury ions from aqueous solution. The study was carried out at different parameters to obtain optimum conditions of pH, biosorbent dose, agitation speed, time of contact, temperature, and initial metal ion concentration. To analyze the suitability of the process and maximum amount of metal uptake, Dubinin-Radushkevich (D-R) model, Freundlich isotherm, and Langmuir isotherm were applied. The values ofqmaxfor natural and treated biosorbents were found at 1.79 and 2.27 mg/g, respectively. The optimum values of contact time and agitation speed were found at 50 min and 150 rpm for natural biosorbent whereas 40 min and 100 rpm for treated biosorbent, respectively. The optimum biosorption capacities were observed at pH 4 and temperature 313 K for both naturalP. karkaand treatedP. karka.RLvalues indicate that comparatively treatedP. karkawas more feasible for mercury adsorption compared to naturalP. karka. Both pseudo-first-order and pseudo-second-order kinetic models were applied and it was found that data fit best to the pseudo-second-order kinetic model. Thermodynamic studies indicate that adsorption process was spontaneous, feasible, and endothermic.

Comparative study on batch equilibrium biosorption of Cd(II), Pb(II) and Zn(II) using plantain (Musa paradisiaca) flower: kinetics, isotherm, and thermodynamics

2019 ◽  
Author(s):  
Chem Int
Keyword(s):  
Metal Ions ◽  
Metal Ion ◽  
Freundlich Isotherm ◽  
Sorption Process ◽  
Ion Concentration ◽  
Isotherm Model ◽  
Order Kinetic ◽  
Sorption Data ◽  
Musa Paradisiaca ◽  
Biosorption Process

The potential of plantain (Musa paradisiaca) flower to remove Cd(II), Pb(II) and Zn(II) from aqueous solutions has been investigated under different process parameters like pH, contact time, biomass dose and initial metal ion concentration. The optimum pH for the biosorption of each of the metal ions is pH 6. The kinetic data obtained were subjected to four kinetic models, among which the pseudo-second order kinetic model was found to be the best model that describes the biosorption of each of the metal ions. The equilibrium sorption data were fitted into Langmuir, Freundlich, Temkin and D-R isotherms. In each case, the Freundlich isotherm model gave the best fit giving the sorption intensity (n) values of 1.17, 0.91 and 0.90 which indicate favourable sorption of Cd(II), Pb(II) and Zn(II), respectively. The heat of the sorption process was estimated from Temkin Isotherm model and the mean free energy was estimated from D-R isotherm model to be 312.81Jmol-1, 223.61Jmol-1 and 316.55Jmol-1 for Cd(II), Pb(II) and Zn(II), respectively. Thermodynamically, the biosorption of each of the metal ions is endothermic and the order of spontaneity of the biosorption process being Cd(II) > Zn(II) > Pb(II). Similarly, positive change in entropy was observed for each, the order of disorderliness is Cd(II) > Zn(II) = Pb(II).

scholarly journals Kinetics and equilibrium studies of the adsorption of nickel (II) ions from aqueous solution onto modified natural and synthetic iron oxide

2015 ◽  
Vol 4 (3) ◽  
pp. 277 ◽  
Author(s):  
Kouoh Sone Paul-Michel Adolphe ◽  
Tagne Guy Merlain ◽  
Lekene Ngouateu René Blaise ◽  
Belibi Belibi Placide Desire ◽  
NdiNsami Julius ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Iron Oxide ◽  
Metal Ion ◽  
Correlation Coefficients ◽  
Ion Concentration ◽  
Order Kinetic ◽  
Equilibrium Studies ◽  
Adsorption Models ◽  
Natural Iron ◽  
Adsorption Processes

<p>The present paper reports on the kinetic and equilibrium studies of the adsorption of Nickel(II) ions from aqueous solution onto modified natural iron oxide (NAT) from Mbalam (East Region of Cameroon) and synthetic iron oxide (SYNTH). The parameters investigated using batch techniques include, the contact time, adsorbent mass, pH and initial metal ion concentration. The experimental results obtained showed that, the optimum pH of 6 for bothadsorbents with an equilibrium time of 30 minutes was sufficient. The kinetic data correlated well with the pseudo-first-order and pseudo-second-order kinetic models for both the adsorbents based on the correlation coefficients (R<sup>2</sup>) obtained. The adsorption processes followed both the Langmuir and the Tempkin adsorption models for the natural iron oxide, whereas the Freundlich and Tempkin adsorption models fitted well the adsorption data for the synthetic iron oxide. The maximum quantity of Nickel(II) ions adsorbed was 250 mg/g for the two adsorbents. These results revealed a high adsorption capacity of natural iron oxide which is comparable to that of synthetic iron oxide.</p>

Equilibrium and Kinetic Studies of Aqueous Cesium(I) Ions Biosorption by Pseudomonas alcaligenes Biomass as a Low-Cost Natural Biosorbent

2010 ◽  
Vol 171-172 ◽  
pp. 53-56
Author(s):  
Tao Zhu ◽  
Lei Wang ◽  
Fa Zhi Ge
Keyword(s):  
Metal Ion ◽  
Binding Capacity ◽  
Low Cost ◽  
Sorption Process ◽  
Ion Concentration ◽  
Hydroxyl Groups ◽  
Order Kinetic ◽  
Equilibrium Studies ◽  
Functional Sites ◽  
Pseudomonas Alcaligenes

The Cs(I) biosorption characteristics of Pseudomonas alcaligenes biomass was examined as a function of initial pH, contact time and initial metal ion concentration. FTIR spectra showed that the principal functional sites taking part in the sorption process included carboxyl, hydroxyl groups and -CH3 stretching groups. The pseudo-second-order kinetic model was found to be well suited for the entire adsorption process of Cs(I) on Pseudomonas alcaligenes, which indicated the biosorption process operated through chemisorption mechanism. Adsorption equilibrium studies showed that Cs(I) adsorption data followed the Langmuir model, the maximum binding capacity of Cs(I) according to Langmuir isotherm were 81.05mg/g at pH 7.0 , shaker speed 150 rpm, at 27°C and for 60 min. The present study indicated that Pseudomonas alcaligenes biomass may be used as an inexpensive, effective and easily cultivable biosorbent for the removal of Cs(I) ions from environmental and industrial wastewater.

Studies on Biosorption Equilibrium and Kinetics of Ni(II) by Pseudomonas Fluorescens

2010 ◽  
Vol 113-116 ◽  
pp. 1828-1832
Author(s):  
Yan Li Mao ◽  
Shui Cheng Tan ◽  
Yao Qing Wang ◽  
Tian Hai Wang ◽  
Kui Zhang
Keyword(s):  
Pseudomonas Fluorescens ◽  
Metal Ion ◽  
Binding Capacity ◽  
Sorption Process ◽  
Ion Concentration ◽  
Hydroxyl Groups ◽  
Order Kinetic ◽  
Mechanism Analysis ◽  
Equilibrium Studies ◽  
Functional Sites

The Ni(II) biosorption characteristics of Pseudomonas fluorescens biomass was examined as a function of initial pH, contact time and initial metal ion concentration. The pseudo-second-order kinetic model was found to be well suited for the entire adsorption process of Ni(II) on biomass. Adsorption equilibrium studies showed that Ni(II) adsorption data followed the Langmuir model, the maximum binding capacity of Ni(II) was 84.45 mg/g at pH 7.0 , shaker speed 150 rpm, at 27 °C. FTIR spectra showed that the principal functional sites taking part in the sorption process included carboxyl , hydroxyl groups and -CH3 stretching groups, the mechanism analysis showed that the chemical chelating was the main adsorption form, electrostatic attraction hydrogen bonding in the process of adsorption. The present study indicated that Pseudomonas fluorescens biomass may be used as an inexpensive, effective and easily cultivable biosorbent for the removal of Ni(II) ions from environmental and industrial wastewater.

scholarly journals Amine modified kaolinite clay from Nigeria: A resource for removing Cd2+ and Pb2+ ions from aqueous solution

2019 ◽  
Vol 17 (2) ◽  
Author(s):  
Adewale Adewuyi ◽  
Fabiano Vargas Pereira ◽  
Omotayo Anuoluwapo Adewuyi
Keyword(s):  
Aqueous Solution ◽  
Metal Ion ◽  
Kinetic Studies ◽  
Ion Concentration ◽  
Bet Surface Area ◽  
Order Kinetic ◽  
X Ray Diffraction ◽  
Kaolinite Clay ◽  
Effects Of Ph ◽  
Infrared Spectrometer

Kaolinite clay (KC) obtained from redemption camp; Nigeria was modified by surface grafting and investigated for the removal of Pb2+ and Cd2+ ions from aqueous solution by adsorption. KC and the modified kaolinite clay (MKC) were characterized using X-ray Diffraction analysis (XRD), Scanning Electron Microscopy (SEM), Brunauer-Emmett-Teller (BET) surface area analyzer, Fourier Transform Infrared spectrometer (FTIR), Particle Size Distribution (PSD), zeta potential, elemental analysis (CHNS/O analyzer) and Energy Dispersive Spectroscopy (EDS). Equilibrium, thermodynamics and kinetic studies were conducted by considering the effects of pH, initial metal ion concentration, contact time, adsorbent weight and temperature. Modification of KC increased its equilibrium adsorption capacity from 8.01 mg/g for Cd2+ and from 24.75 mg/g to 36.41 mg/g for Pb2+ ions. The adsorption process obeys Freundlich and Temkin isotherms. The adsorption was second-order-kinetic and controlled by both intra-particle and liquid film diffusion. Values of ΔGo, ΔHo, and ΔSo, for KC an MKC showed a stable adsorbent-adsorbate configuration.

scholarly journals Adsorption of Hg(II) from Aqueous Solution Using Adulsa (Justicia adhatoda) Leaves Powder: Kinetic and Equilibrium Studies

2013 ◽  
Vol 2013 ◽  
pp. 1-11 ◽  
Author(s):  
Mohd Aslam ◽  
Sumbul Rais ◽  
Masood Alam ◽  
Arulazhagan Pugazhendi
Keyword(s):  
Contact Time ◽  
Metal Ion ◽  
Sorption Process ◽  
Intraparticle Diffusion ◽  
Ion Concentration ◽  
Maximum Adsorption Capacity ◽  
Order Kinetic ◽  
Equilibrium Studies ◽  
Intraparticle Diffusion Model ◽  
Pseudosecond Order

The ability of Adulsa leaves powder (ALP) to adsorb Hg(II) from aqueous solutions has been investigated through batch experiments. The ALP biomass was characterized by Fourier transform infrared spectroscopy and scanning electron microscopy. The experimental parameters that were investigated in this study included pH, adsorbent dosage, and effect of contact time along with initial metal ion concentration. The adsorption process was relatively fast, and equilibrium was achieved after 40 min of contact time. The maximum removal of Hg(II), 97.5% was observed at pH 6. The adsorption data were correlated with Langmuir, Freundlich, and Temkin isotherms. Isotherms results were amply fitted by the Langmuir model determining a monolayer maximum adsorption capacity (qm) of ALP biomass equal to 107.5 mg g−1and suggesting a functional group-limited sorption process. The kinetic process of Hg(II) adsorption onto ALP biomass was tested by applying pseudofirst-order, pseudosecond-order, Elovich, and intraparticle-diffusion models to correlate the experimental data and to determine the kinetic parameters. It was found that the pseudosecond order kinetic model for Hg(II) adsorption fitted very well. The rate determining step is described by intraparticle diffusion model. These studies considered the possibility of using Adulsa plant leaves biomass as an inexpensive, efficient, and environmentally safe adsorbent for the treatment of Hg(II) contaminated wastewaters.

Characteristics of sorption of uncomplexed and complexed Pb(II) from aqueous solutions onto peat

2012 ◽  
Vol 66 (4) ◽  
Author(s):  
Laura Bulgariu ◽  
Dumitru Bulgariu ◽  
Matei Macoveanu
Keyword(s):  
Aqueous Solution ◽  
Metal Ion ◽  
Sorption Process ◽  
Ion Concentration ◽  
Complexing Agents ◽  
Hydroxyl Groups ◽  
Mechanism Analysis ◽  
Maximum Sorption ◽  
Initial Ph ◽  
Equilibrium Data

AbstractBatch experiments aimed at the sorption of Pb(II) onto peat were performed from an aqueous solution in both the absence and presence of common complexing agents (acetate or citrate). The influence of the initial pH of the solution, metal ion concentration and contact time on the sorption efficiency of Pb(II) was examined at ambient temperature (18 ± 0.5) °C for each experiment. The results showed that the presence of acetate improved the efficiency of the sorption process, while the presence of citrate in the aqueous solution decreased the efficiency of the Pb(II) sorption onto peat. The equilibrium data fitted well with the Langmuir isotherm model and confirmed the monolayer sorption of uncomplexed and complexed Pb(II) species onto peat. The values of maximum sorption capacities (q max) were 135.13 mg g−1 for Pb(II) complexed with acetate, q > 79.36 mg g−1 for uncomplexed Pb, q > 38.46 mg g−1 for Pb(II) complexed with citrate. The kinetics of Pb(II) sorption onto peat, in both the absence and presence of complexing agents, indicated a pseudosecond order mechanism. Analysis of IR spectra showed that carboxylic and hydroxyl groups had an important role in the binding process of Pb(II) species onto peat.

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