Biosorption of Zinc from Aqueous Solution Using Chemically Treated Rice Husk

In this study, adsorption of zinc onto the adsorbent (untreated rice husk and NaOH-treated rice husk) was examined. During the removal process, batch technique was used, and the effects of pH and contact time were investigated. Langmuir isotherm was applied in order to determine the efficiency of NaOH-treated rice husk used as an adsorbent. The zinc adsorption was fast, and equilibrium was attained within 30 min. The maximum removal ratios of zinc for untreated rice husk and NaOH-treated rice husk after 1.5 h were 52.3% and 95.2%, respectively, with initial zinc concentration of 25 mg/L and optimum pH of 4.0. Data obtained from batch adsorption experiments fitted well with the Langmuir isotherm model. Maximum adsorption capacity of zinc onto untreated rice husk and NaOH-treated rice husk was 12.41 mg/g, and 20.08 mg/g respectively, at adsorbent dosage of 1 g/L at 25°C. The nature of functional groups (i.e., amino, carboxyl, and hydroxyl) and metal ion interactions was examined by the FT-IR technique. It was concluded that the NaOH-treated rice husk had stronger adsorption capacity for Zn2+compared with the untreated rice husk. The NaOH-treated rice husk is an inexpensive and environmentally friendly adsorbent for Zn2+removal from aqueous solutions.

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Fe(OH)3/kaolinite nanoplatelets: Equilibrium and thermodynamic studies for the adsorption of Pb(II) ions from aqueous solution

10.31219/osf.io/kpbg2 ◽

2021 ◽

Author(s):

CI Chemistry International

Keyword(s):

Adsorption Capacity ◽

Langmuir Isotherm ◽

Metal Ion ◽

Adsorption Process ◽

Ion Concentration ◽

Maximum Adsorption Capacity ◽

Clay Deposits ◽

Effects Of Ph ◽

Langmuir Isotherm Model ◽

Removal Of Metal Ions

Development of a sustainable route for preparation Fe(OH)3/kaolinite nanoplatelets from Batin El-Ghoul clay deposits, south Jordan with uniform plate-like morphology. Fe(OH)3/kaolinite nanoplatelets is an efficient adsorbent for the removal of Pb(II) ions from aqueous solutions. Effects of pH solution, adsorbent dose, initial metal ion concentration, contact time, and temperature on the adsorption process were examined. The Langmuir isotherm model is the best fit model to predict the experimental data and the adsorption capacity. Maximum adsorption capacity on Langmuir isotherm was 370.37 mg/g. Thermodynamic parameters revealed that the negative values of ΔGo and the positive value of ΔHo, the adsorption process was spontaneous and endothermic. Results revealed that Fe(OH)3/kaolinite is promising for the removal of metal ions from effluents.

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Fabrication of Carboxymethylcellulose/Metal-Organic Framework Beads for Removal of Pb(II) from Aqueous Solution

Materials ◽

10.3390/ma12060942 ◽

2019 ◽

Vol 12 (6) ◽

pp. 942 ◽

Cited By ~ 10

Author(s):

Huo-Xi Jin ◽

Hong Xu ◽

Nan Wang ◽

Li-Ye Yang ◽

Yang-Guang Wang ◽

...

Keyword(s):

Aqueous Solutions ◽

Adsorption Capacity ◽

Photoelectron Spectroscopy ◽

Langmuir Isotherm ◽

Adsorption Equilibrium ◽

Isotherm Model ◽

Maximum Adsorption Capacity ◽

X Ray ◽

Metal Organic ◽

Langmuir Isotherm Model

The ability to remove toxic heavy metals, such as Pb(II), from the environment is an important objective from both human-health and ecological perspectives. Herein, we describe the fabrication of a novel carboxymethylcellulose-coated metal organic material (MOF-5–CMC) adsorbent that removed lead ions from aqueous solutions. The adsorption material was characterized by Fourier-transform infrared spectroscopy, X-ray diffractometry, scanning electron microscopy, and X-ray photoelectron spectroscopy. We studied the functions of the contact time, pH, the original concentration of the Pb(II) solution, and adsorption temperature on adsorption capacity. MOF-5–CMC beads exhibit good adsorption performance; the maximum adsorption capacity obtained from the Langmuir isotherm-model is 322.58 mg/g, and the adsorption equilibrium was reached in 120 min at a concentration of 300 mg/L. The adsorption kinetics is well described by pseudo-second-order kinetics, and the adsorption equilibrium data are well fitted to the Langmuir isotherm model (R2 = 0.988). Thermodynamics experiments indicate that the adsorption process is both spontaneous and endothermic. In addition, the adsorbent is reusable. We conclude that MOF-5–CMC is a good adsorbent that can be used to remove Pb(II) from aqueous solutions.

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Simultaneous Removal of Dyes Colour and Cu(II) Metal Ions using Acetone-Formaldehyde-Salicyclic Acid Resin

Asian Journal of Chemistry ◽

10.14233/ajchem.2019.22116 ◽

2019 ◽

Vol 31 (10) ◽

pp. 2240-2244

Author(s):

Vihar Patel ◽

Akshit A. Patel ◽

Bharat Dixit ◽

Ritu Dixit

Keyword(s):

Langmuir Isotherm ◽

Metal Ion ◽

Activated Carbons ◽

Ion Concentration ◽

Salicyclic Acid ◽

Effects Of Ph ◽

Endothermic Process ◽

Langmuir Isotherm Model ◽

Langmuir And Freundlich Models ◽

Commercial Adsorbent

Removal of dyes colour and Cu(II) metal ion from aqueous solution using acetone-formaldehyde-salicyclic acid (AFSA) resin has been carried out. The results revealed that AFSA resin acts as a cheap substitute to commercial adsorbent like activated carbons. The effects of pH, adsorbent dose, contact time, and initial dye and Cu(II) metal ion concentration on the adsorption efficiencies were investigated. Isotherm studies were conducted using Langmuir and Freundlich models, and thermodynamic studies were also performed. Adsorption of dyes was found to obey the Langmuir isotherm model and have endothermic process. The maximum adsorption capacities calculated from the Langmuir isotherm were found to be 88.18 and 2.9 mg/g for methyl orange dyes

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Synthesis of NH2-Functionalized Nano-Fe3O4 Magnetic Polymer Adsorbent and its Application for the Removal of Cr (VI) from Industrial Wastewater

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.79-82.1883 ◽

2009 ◽

Vol 79-82 ◽

pp. 1883-1886 ◽

Cited By ~ 1

Author(s):

Yong Gang Zhao ◽

Hao Yu Shen ◽

Mei Qin Hu ◽

Feng Wei ◽

Yun Jie Luo ◽

...

Keyword(s):

Langmuir Isotherm ◽

Industrial Wastewater ◽

Ph Value ◽

Batch Adsorption ◽

Maximum Adsorption Capacity ◽

Adsorption Efficiency ◽

Mechanism Study ◽

Study Results ◽

Isotherm Adsorption ◽

Effects Of Ph

In this study, a novel NH2-functionalized nano-sized magnetic polymer (TEPA-NMP) adsorbent coupling with tetraethylenepentamine (TEPA) had been prepared. Its application for the removal of Cr(VI) from industrial wastewater was investigated. Batch adsorption studies were carried out to evaluate the effects of pH value, initial concentration, adsorption isotherm, adsorption kinetics, and desorption characters etc. The adsorption of Cr(VI) reached equilibrium rapidly within 30 mins. The adsorption efficiency of the TEPA-NMP on Cr(VI) was dependent on pH value and the initial Cr(VI) concentration. The adsorption efficiency of Cr(VI) decreased with the increasing of the initial Cr(VI) concentration and pH value. The adsorption data were well fitted with the Langmuir isotherm. The maximum adsorption capacity calculated from the Langmuir isotherm was 370.4 mg/g at temperature of 35 °C and pH of 2.0. Regeneration studies indicated that the adsorbent could be reused for 8 times with only 3.4 % lost of adsorption efficiency. The adsorption mechanism study results suggested that the adsorption of Cr(VI) could be related with electrostatic attraction, ion exchange and coordination interactions.

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Adsorption of Copper(II) and Mercury(II) Ions onto Chemically-Modified Chitosan Membranes: Equilibrium and Kinetic Properties

Adsorption Science & Technology ◽

10.1260/0263-6174.30.1.1 ◽

2012 ◽

Vol 30 (1) ◽

pp. 1-21 ◽

Cited By ~ 23

Author(s):

R.B. Rabelo ◽

R.S. Vieira ◽

F.M.T. Luna ◽

E. Guibal ◽

M.M. Beppu

Keyword(s):

Adsorption Capacity ◽

Metal Ion ◽

Batch Process ◽

Second Order ◽

Infrared Spectrometry ◽

Maximum Adsorption Capacity ◽

Kinetic Properties ◽

Pseudo Second Order ◽

Ft Ir ◽

Chitosan Membranes

Cross-linked chitosan was synthesized with glutaraldehyde (chitosan–GLA) and epichlorohydrin (chitosan–ECH). The structures of these matrices were characterized by elemental analysis, Fourier-transform infrared spectrometry (FT-IR), the degree of de-acetylation and the surface topography as determined via scanning electron microscopy (SEM). After promoting interaction with the metal ion, the adsorbent was also studied using FT-IR and energy dispersive X-ray spectroscopy (EDXS). Adsorption studies for Cu(II) and Hg(II) ions were carried out in a batch process. The adsorption kinetics were tested using three models, viz. pseudo-first-order, pseudo-second-order and intra-particle diffusion. The experimental kinetic data were best fitted by the pseudo-second-order model for Cu(II) ions (R2 ≥ 0.98) and for Hg(II) ions (R2 = 0.99). Higher rate constants (k2) were obtained for the adsorption of Cu(II) ions onto chitosan–GLA [1.40 g/(mmol h)] and for Hg(II) ions onto raw chitosan [5.65 g/(mmol h)]. The adsorption rate depended on the concentration of Cu(II) and Hg(II) ions on the adsorbent surface and on the quantity of ions adsorbed at equilibrium. At 293 K, the Langmuir–Freundlich model provided a better fit to the adsorption isotherms on both raw and cross-linked chitosan membranes. The maximum adsorption capacity for Cu(II) ions was obtained with the chitosan–GLA matrix (2.7 mmol/g). A maximum adsorption capacity of 3.1 mmol/g was attained for Hg(II) ions onto the chitosan–ECH matrix.

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Removal of Mn(II) from Aqueous Solution Using Saponified Garlic Peel

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.694.382 ◽

2014 ◽

Vol 694 ◽

pp. 382-386 ◽

Cited By ~ 2

Author(s):

Bo Liang ◽

Wan He Zhao ◽

Kai Huang ◽

Hong Min Zhu

Keyword(s):

Metal Ion ◽

Chemical Properties ◽

Correlation Coefficients ◽

Ion Concentration ◽

Batch Adsorption ◽

Maximum Adsorption Capacity ◽

Pseudo Second Order ◽

Ft Ir ◽

Physical And Chemical ◽

Garlic Peel

The removal of Mn (II) ion by saponified garlic peel (S-GP) was investigated using batch adsorption. SEM and FT-IR were employed to investigate the physical and chemical properties of S-GP. The adsorption was evaluated as a function of initial metal ion concentration, contact time and temperature. The maximum adsorption capacity for Mn (II) was 0.51 mol/kg, and the adsorption process followed the Langmuir model. Pseudo-second-order models fitted the experimental data well and kinetic parameters, rate constants, equilibrium sorption capacity and related correlation coefficients at various temperatures were calculated and discussed. A possible adsorption mechanism based on a cation exchange was proposed for the adsorption of Mn (II).

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Kulit Kacang Tanah (Arachis hypogaea L.) sebagai Adsorben Ion Pb(II)

ALKIMIA : Jurnal Ilmu Kimia dan Terapan ◽

10.19109/alkimia.v2i1.2258 ◽

2018 ◽

Vol 2 (1) ◽

pp. 17-27

Author(s):

Ade Oktasari

Keyword(s):

Adsorption Capacity ◽

Metal Ion ◽

Maximum Adsorption Capacity ◽

Order Kinetic ◽

Peanut Shell ◽

Arachis Hypogea ◽

Metal Ion Adsorption ◽

Arachis Hypogaea L ◽

Adsorption Affinity ◽

Langmuir Isotherm Model

An experiment on Pb (II) metal ion adsorption using peanut (Arachis hypogea L.) shell without activation (KK), acid-activated (KKA), and base-activated (KKB) has been conducted. Peanut shell powder was activated using H3PO4 and KOH to improve adsorption effectivity and capacity. Characterization results using FT-IR spectrophotometer showed peak at 3410 and 2901 cm-1 indicated OH dan CH aliphatic from framework of cellulose. Optimum condition of Pb(II) adsorption for KK, KKA and KKB was occurred at the same optimum pH, that was pH 5, with contact time 60, 90 and 70 min, respectively. The adsorption kinetic parameter of Pb(II) ion for KK, KKA, and KKB followed pseudo second order kinetic with rate constants (k) in order of 12.279, 4.149, and 32.258 g mmol-1 min-1, with maximum adsorption capacity based on Langmuir isotherm model of 0.598, 0.505, and 0.622 mmol g-1, and adsorption energy of 26.735, 25.789, and 29.245 kJ mol-1, respectively. The results indicated that KOH-activated peanut (Arachis hypogea L.) shell has good adsorption affinity for Pb(II) with highest adsorption capacity compare to those from non-activated and acid-activated.

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Improved Study on the Performance of Polyacrylamide/Attapulgite Clay Composite Material Removing Copper (II) Ions from Aqueous Solution

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.609-610.26 ◽

2014 ◽

Vol 609-610 ◽

pp. 26-31

Author(s):

Chun Lei Li ◽

Hui Xu ◽

Jun Long Zhang ◽

Wei Wang ◽

Jing Tang ◽

...

Keyword(s):

Metal Ion ◽

Ion Concentration ◽

Batch Adsorption ◽

Maximum Adsorption Capacity ◽

Freundlich Isotherms ◽

Thermodynamics And Kinetics ◽

Equilibrium Data ◽

Ft Ir ◽

Adsorption Desorption ◽

Ft Ir Spectroscopy

A removal of Cu (II) ions from aqueous solutions onto PAM/ATP has been investigated using batch adsorption technique, including the effect of pH, contact time, initial metal ion concentration, adsorption thermodynamics and kinetics. PAM/ATP was characterized with Fourier transform infrared (FT-IR) spectroscopy and scanning electron microscopy (SEM). The equilibrium data were analyzed using Langmuir and Freundlich isotherms and the best interpretation was given by Langmuir. The maximum adsorption capacity was found to be 212 mg/g after 60 min when pH =3. Regeneration experiments showed that the investigated PAM/ATP could be reused without significant adsorption losses even after five adsorption-desorption cycles.

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Hemicellulose-Based Porous Hydrogel for Methylene Blue Adsorption

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.560-561.482 ◽

2012 ◽

Vol 560-561 ◽

pp. 482-487 ◽

Cited By ~ 2

Author(s):

Zhan Xin Jing ◽

Xiao Feng Sun ◽

Qing Ye ◽

Ya Jing Li

Keyword(s):

Methylene Blue ◽

Adsorption Capacity ◽

Adsorption Mechanism ◽

Maximum Adsorption Capacity ◽

Methylene Blue Adsorption ◽

Monolayer Adsorption ◽

Effects Of Ph ◽

Alkaline Conditions ◽

Ft Ir ◽

Porous Hydrogel

Hemicellulose-based porous hydrogel for methylene blue adsorption from aqueous solution was studied. The surface morphology of sample was analyzed by SEM, finding that it had the porous structure. Effects of pH and initial concentration on the adsorption capacity were investigated. Isotherm studies found that the adsorption of metylene blue onto absorbent was a monolayer adsorption, and the maximum adsorption capacity was 444.44 mg/g. The adsorption mechanism was analyzed by FT-IR, and it showed that the produced -COO- groups in alkaline conditions were advantaged for adsorption process, which offers the impetus for combination of adsorbent and methylene blue. Hemicellulose-based porous hydrogel is an inexpensive and biodegradable material, and can be a promising absorbent for cationic removing from wastewater.

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Study of Humic Acid Adsorption Equilibrium on Dual Nanofiber PMMA/PVDF

JKPK (Jurnal Kimia dan Pendidikan Kimia) ◽

10.20961/jkpk.v3i1.11918 ◽

2018 ◽

Vol 3 (1) ◽

pp. 13

Author(s):

Muhammad Ali Zulfikar ◽

Afdal Bahri ◽

Muhamad Nasir

Keyword(s):

Experimental Data ◽

Aqueous Solution ◽

Humic Acid ◽

Adsorption Capacity ◽

Langmuir Isotherm ◽

Adsorption Equilibrium ◽

Experimental Results ◽

Isotherm Models ◽

Batch Adsorption ◽

Maximum Adsorption Capacity

The main objective of this study is to investigate the isotherm sorption of humic acid (HA) from aqueous solution onto dual nanofiber PMMA/PVDF. Batch adsorption experiments were carried out using HA solution as an adsorbate under variety of concentration in the range of 50-200 mg/L. The experimental data were analyzed by the Langmuir, Freundlich and Sips models of adsorption. The experimental results indicate that, the adsorption capacity of HA adsorption increases with an increase in the HA concentrations. The adsorption of HA onto dual nanofiber PMMA/PVDF agrees well with the Langmuir isotherm models with the maximum adsorption capacity was found to be 137.40 mg g-1 at concentration of 100 mg L-1.

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