Adsorption performance of magnetic aminated lignin for the removal of Cu(II) and Cd(II)

TAPPI Journal ◽  
2019 ◽  
Vol 18 (01) ◽  
pp. 9-18
Author(s):  
Dafeng Zheng ◽  
Yingzhi Ma ◽  
Xueqing Qiu ◽  
Xuejun Pan
Keyword(s):  
Heavy Metals ◽  
Entropy Change ◽  
Enthalpy Change ◽  
Langmuir Model ◽  
Maximum Adsorption Capacity ◽  
Order Model ◽  
Adsorption Performance ◽  
Monolayer Adsorption ◽  
Removal Of Heavy Metals ◽  
Pseudo Second Order

The adsorption behavior of Cu(II) and Cd(II) onto a magnetic lignin-based nanomaterial (MLN) was investigated in detail. The results showed that the adsorption isotherm was better described by the Langmuir model, showing monolayer adsorption with a maximum adsorption capacity of 135.7 and 156.5 mg/g. The kinetics fit the pseudo-second-order model. The thermodynamics showed the enthalpy change of the adsorption for Cu(II) and Cd(II) was 24.12 and 36.49 kJ/mol, with entropy change of 85.12 and 130.3 J/mol·K, respectively; thus, the adsorption was endothermic and spontaneous in the range of 25°C–45°C. Additionally, the adsorbent was easy to regenerate. This study shows that MLN is a capable, sustainable absorbent for the removal of heavy metals.

Facile synthesis of chitosan nanoparticle-modified MnO2 nanoflakes for ultrafast adsorption of Pb(II) from aqueous solution

2016 ◽  
Vol 17 (1) ◽  
pp. 32-38 ◽  
Author(s):  
Tianli Han ◽  
Xiaoman Zhang ◽  
Xiangqian Fu ◽  
Jinyun Liu
Keyword(s):  
Aqueous Solution ◽  
Ph Value ◽  
Langmuir Model ◽  
Maximum Adsorption Capacity ◽  
Order Model ◽  
Facile Synthesis ◽  
Adsorption Sites ◽  
Chitosan Nanoparticle ◽  
Pseudo Second Order ◽  
Potential Strategy

Chitosan nanoparticle (CS NP)-modified MnO2 nanoflakes were presented as a novel adsorbent for fast adsorption of Pb(II) from aqueous solution. Loading dense CS NPs onto mono-dispersive flower-like MnO2 nanostructures reduces the overlap of CS during adsorption, and thus improves the contact of functional adsorption sites on the surface of MnO2 nanoflakes with heavy metal ions. The results show that the removal efficiency of the nanoadsorbents reaches up to 93% in 3 min for Pb(II). In addition, the maximum adsorption capacity, effects of adsorbent dosage and pH value, and the reusability were investigated. The kinetic process and adsorption isotherm fit well with the pseudo-second-order model and Langmuir model, respectively. These findings provide a potential strategy to address the overlap issue of some common nanoadsorbents.

scholarly journals Corn stalk as starting material to prepare a novel adsorbent via SET-LRP and its adsorption performance for Pb(II) and Cu(II)

2020 ◽  
Vol 7 (3) ◽  
pp. 191811
Author(s):  
Yazhen Wang ◽  
Shuang Li ◽  
Liqun Ma ◽  
Shaobo Dong ◽  
Li Liu
Keyword(s):  
Adsorption Capacity ◽  
Potassium Hydroxide ◽  
Adsorption Process ◽  
Hydroxylamine Hydrochloride ◽  
Freundlich Isotherm ◽  
Maximum Adsorption Capacity ◽  
Corn Stalk ◽  
Order Model ◽  
Adsorption Performance ◽  
Pseudo Second Order

Corn stalk was used as the initial material to prepare a corn stalk matrix-g-polyacrylonitrile-based adsorbent. At first, the corn stalk was treated with potassium hydroxide and nitric acid to obtain the corn stalk-based cellulose (CS), and then the CS was modified by 2-bromoisobutyrylbromide (2-BiBBr) to prepare a macroinitiator. After that, polyacrylonitrile (PAN) was grafted onto the macroinitiator by single-electron transfer living radical polymerization (SET-LRP). A novel adsorbent AO CS-g-PAN was, therefore, obtained by introducing amidoxime groups onto the CS-g-PAN with hydroxylamine hydrochloride (NH 2 OH · HCl). FTIR, SEM and XPS were applied to characterize the structure of AO CS-g-PAN. The adsorbent was then employed to remove Pb(II) and Cu(II), and it exhibited a predominant adsorption performance on Pb(II) and Cu(II). The effect of parameters, such as temperature, adsorption time, pH and the initial concentration of metal ions on adsorption capacity, were examined in detail during its application. Results suggest that the maximum adsorption capacity of Pb(II) and Cu(II) was 231.84 mg g –1 and 94.72 mg g −1 , and the corresponding removal efficiency was 72.03% and 63%, respectively. The pseudo-second order model was more suitable to depict the adsorption process. And the adsorption isotherm of Cu(II) accorded with the Langmuir model, while the Pb(II) conformed better to the Freundlich isotherm model.

Adsorption of the Blue Dye Reactive Remazol RN in Cellulosic Materials

2014 ◽  
Vol 775-776 ◽  
pp. 749-754
Author(s):  
Mirna Sales Loiola Rosa ◽  
Marcos Pereira Silva ◽  
Alan Icaro Morais ◽  
Maria Rita de Morais Chaves Santos ◽  
Edson Cavalcanti Silva Filho ◽  
...  
Keyword(s):  
Low Cost ◽  
Langmuir Model ◽  
Blue Dye ◽  
Maximum Adsorption Capacity ◽  
Order Model ◽  
Textile Waste ◽  
Pseudo Second Order ◽  
Filter Papers ◽  
Best Fit ◽  
The Ideal

The disposal of textile waste in water bodies is exacerbating environmental problems, which led scientists to seek natural materials to develop more sustainable ways. Searching for low cost materials was used to remove the dye in two cellulosic sources (filter papers of different brands). The papers were characterized by XRD which confirmed crystallographic profile similar to cellulose. With the aim of optimizing the best conditions, various tests were performed, where the ideal time was 180 minutes for the paper 1 and 240 minutes for the second paper, both by adjusting the pseudo second-order model. The other parameters studied was the pH, adsorbate-adsorbent systems which have maximum adsorption capacity of 2.76 mg / g at pH 2.02 and 2 mg / g at pH 11 for the paper 1 and 10.57 mg / g pH 4 and 2 mg / g at pH 11 for the paper 2. Both adsorbents had the best fit to the Langmuir model in pHs 2 and 11 at the temperature of 298 K.

Methylene Blue Adsorption onto NaOH Treated Leucaena leucocephala Leaf Power

2015 ◽  
Vol 752-753 ◽  
pp. 251-256
Author(s):  
Megat Ahmad Kamal Megat Hanafiah ◽  
Noor Fhadzilah Mansur ◽  
Wan Mohd Nazri Wan Ab Rahman ◽  
Mardhiah Ismail
Keyword(s):  
Methylene Blue ◽  
Industrial Wastewater ◽  
Adsorption Equilibrium ◽  
Langmuir Model ◽  
Maximum Adsorption Capacity ◽  
Order Model ◽  
Adsorption Parameters ◽  
Leaf Powder ◽  
Pseudo Second Order ◽  
Kinetics And Isotherms

The potential of sodium hydroxide (NaOH) modified Petai Belalang (Leucaenaleucocephala) leaf powder as a biosorbent for methylene blue removal from aqueous solutions was investigated. Adsorption parameters studied include initial dye concentration, pH, dosage, kinetics and isotherms. The pHzpc of chemically treated Leucaenaleucocephala leaf powder was 7.50 and adsorption equilibrium time was achieved after 60 min. The kinetic data was best represented by the pseudo-second order model. The maximum adsorption capacity predicted from Langmuir model was 208.33 mg g-1. This work indicated that NaOH treated Leucaenaleucocephala leaf powder can be an attractive biosorbent for MB removal from diluted industrial wastewater.

scholarly journals A Study on Adsorption of Heavy Metals with Zeolite and FeS Media

2020 ◽  
Vol 42 (7) ◽  
pp. 349-359
Author(s):  
Gimin Lee ◽  
Gyuri Kim ◽  
Sungkyu Choi ◽  
Tae-jin Lee
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Reaction Kinetics ◽  
Adsorption Capacity ◽  
Second Order ◽  
Maximum Adsorption Capacity ◽  
Adsorption Characteristics ◽  
Removal Of Heavy Metals ◽  
Pseudo Second Order ◽  
Kinetics Of

Objectives:Adsorption characteristics in aqueous solution were investigated to effectively remove heavy metals by the crystallization of FeS and reaction kinetics were analyzed to compare with heavy metal adsorption characteristics of zeolite.Methods:The adsorption characteristics of each media were analyzed using Langmuir adsorption isotherm, and the adsorption reaction kinetics of heavy metals (Pb, Cu, Zn) on zeolite and FeS media were analyzed by a pseudo-first or pseudo-second order reaction kinetics.Results and Discussion:The maximum adsorption capacity of zeolite was highest in Pb, and the adsorption preference was in the order of Pb>Cu>Zn. In the case of FeS media, Cu was found to have a higher adsorption capacity than Pb or Zn, and the adsorption preference was observed to be Cu>Pb>Zn. It was found that the adsorption mechanism is based on chemical adsorption (chemisorption) because adsorption of each heavy metal onto zeolite or FeS media is more suitable for pseudo-second order kinetics.Conclusions:It was found that the removal of heavy metals through FeS media has a different pattern from zeolite, and when comparing the adsorption capacity of each media, it was found that FeS media is more effective for Zn or Cu except Pb.

scholarly journals Kinetic study on the removal of heavy metals by Cajanus Cajan husk

2019 ◽  
pp. 206-229
Author(s):  
Mallappa A. Mallappa A. Devania, Mallappa A. Devania ◽  
Basudeb Munshi
Keyword(s):  
Heavy Metals ◽  
Kinetic Model ◽  
Kinetic Models ◽  
Cajanus Cajan ◽  
Second Order ◽  
Order Model ◽  
First Order ◽  
Removal Of Heavy Metals ◽  
Pseudo Second Order ◽  
Pseudo First Order

The removal of heavy metals from wastewater has become crucial to meet safe discharge standards. Development of more economic process has been strived owing to high cost of adsorbents. Thus, biosorption process has become the area of interest to researchers and engineers. The present study has carried out the transient removal of heavy metals from wastewater by both physically treated and chemically modified Cajanus cajan (Pigeon pea) husk (CCH) as novel biosorbents. Work includes five different models such as first order, second order, nth order, first order reversible and second order reversible under the heading of prediction of transient concentration of metal in the solution are used, and under the heading of prediction of transient metal uptake capacity; fractional power, pseudo first order, pseudo second order, second order reversible, Elovich, intra-particle diffusion and film diffusion models are used to analyse the kinetic data. For a metal at any particular initial concentration the best kinetic model with the least RMSE is identified. Pictorial comparison between experimental and pseudo second order and pseudo first order model predictive data of Cd(II) and Cu(II) transient biosorption, respectively onto CCH are illustrated. The trend of the results shows a successful prediction capability of all the kinetic models used in the present work. According to RMSE data, it can be concluded that the best kinetic models are pseudo second order for Cd(II) and pseudo first order for Cu(II). It has been found that the required equilibrium time is always less for the chemically activated than the physically activated sorbent. At 100 mg/L initial metal concentration, pseudo-first-order model has been identified as the best kinetic model for the transient Cu(II) and the best kinetic model for fitting the transient sorption of Cd(II) on CCH is pseudo-second-order. At initial metal concentration of 150 mg/L, initial biosorption rate of 9.7038 for Cd(II) on CCH(N) is greater than 1.4553 for Cu(II) on CCH(N). These indicate that Cd(II) undergoes faster adsorption rate than Cu(II) onto CCH.

scholarly journals Brasil nut mesocarp (Bertholletia excels) as a Biomass Source for Activated Carbon Production: Correlation Between Thermal Treatment and Adsorption Performance

2021 ◽  
Vol 12 (4) ◽  
pp. 4584-4596
Keyword(s):  
Activated Carbon ◽  
Maximum Adsorption Capacity ◽  
Brazil Nut ◽  
Order Model ◽  
X Ray ◽  
Adsorption Performance ◽  
Carbon Production ◽  
Pseudo Second Order ◽  
Adsorption Desorption ◽  
Best Fit

The activated carbon investigated in this work was produced from the extractive residues of Brazil nut processing, more specifically from the mesocarp of the Amazonian fruit. The process was performed by muffle pyrolysis, with ZnCl2 impregnation, at 400 and 500 °C. All samples were characterized by X-ray diffractometry, thermogravimetry, CHNS elemental analysis, scanning electron microscopy, and adsorption/desorption of N2. The results were promissory, with 99% removal of methylene blue for the CA25 material, which has a surface area of 1236 m2 g-1, much higher than commercial coal (CAC, 618 m2 g-1). The adsorption kinetics best fit the pseudo-second-order model for all materials. The maximum adsorption capacity obtained was 195.3 mg g-1. Therefore, the extractive residue of Brazil nut has excellent potential for the development of activated carbon, which can be used effectively to mediate environmental contamination in a given aqueous medium.

scholarly journals Adsorption behavior of phosphate on anion-functionalized nanoporous polymer

2015 ◽  
Vol 52 (3) ◽  
pp. 187-195 ◽  
Author(s):  
Zhenyu Wu ◽  
Dasheng Gao ◽  
Ningning Liu
Keyword(s):  
Adsorption Process ◽  
Treatment Method ◽  
Langmuir Model ◽  
Adsorption Behavior ◽  
Maximum Adsorption Capacity ◽  
Order Model ◽  
N2 Adsorption ◽  
Equilibrium Data ◽  
Pseudo Second Order ◽  
Adsorption Desorption

An anion-functionalized nanoporous polymer was successfully prepared by quaternary ammonization and anion-exchange treatment method. The polymer was characterized by scanning electron microscopy, Fourier transform infrared spectroscopy, N2 adsorption/desorption isotherms and thermogravimetric analysis. Batch experiments were conducted to investigate the adsorption behavior of phosphate on the polymer. The results indicated that the experimental equilibrium data can be well described by the Langmuir model. The maximum adsorption capacity determined from the Langmuir model was 4.92 mg g−1. For kinetic study, the adsorption behavior followed the pseudo-second-order model. Thermodynamic studies indicated that the adsorption process was spontaneous and exothermic.

Adsorption of Mercury Ion on Activated Carbons from Rice Husk

2012 ◽  
Vol 161 ◽  
pp. 162-166 ◽  
Author(s):  
Xiao Lan SONG ◽  
Ying Zhang ◽  
Cheng Yin Yan ◽  
Wen Juan Jiang ◽  
Hong Jiang Xie
Keyword(s):  
Activated Carbon ◽  
Adsorption Capacity ◽  
Rice Husk ◽  
Activated Carbons ◽  
Langmuir Model ◽  
Mercury Ion ◽  
Maximum Adsorption Capacity ◽  
Adsorption Performance ◽  
Monolayer Adsorption ◽  
Adsorption Data

The adsorption performance of mercury ion onto activated carbon prepared from rice husk with NaOH was carried out at initial concentration of 100 mg/L. The activated carbon obtained at 800 °C possessed the outstanding specific surface area of 2786 m2/g. And the results showed that the maximum adsorption capacity of Hg2+ was recorded as 342.0 mg/g due to abundant micropores of 1.076 nm. In addition, the adsorption data were well explained by the Langmuir model with the monolayer adsorption capacity of 555.6 mg/g.

Adsorption of Dye from Wastewater by Modified Sawdust

2014 ◽  
Vol 1065-1069 ◽  
pp. 3123-3126
Author(s):  
Gang Chao Zhu ◽  
Jian Xin Shou ◽  
Jia Wei Qian ◽  
Hua Zheng Xin ◽  
Mu Qing Qiu
Keyword(s):  
Adsorption Capacity ◽  
Contact Time ◽  
Ph Value ◽  
Langmuir Model ◽  
Ammonium Bromide ◽  
Maximum Adsorption Capacity ◽  
Order Model ◽  
Adsorption Processes ◽  
Endothermic Process ◽  
Pseudo Second Order

In this study, sawdust modified by cetyltimethyl ammonium bromide was applied to adsorb conge red in aqueous solutions. The characteristics of modified sawdust were characterized by Fourier transform infrared spectrum and scanning electron microscopy. The effect of factors, such as pH, contact time, temperature, dosage, and salt concentration, were investigated. The results revealed that the addition of modified sawdust can significantly increase the adsorption capacity of dye. The maximum adsorption capacity of dye on modified sawdust was 109 mg·g-1 at 328K. The adsorption processes were rapid within the first 30 min and reached equilibrium in about 150 min. The adsorption kinetics fitted well with pseudo-second-order model. The pH value of the solution had significant impact on the amount of adsorption. Adsorption isotherm fitted better with the Langmuir model and the adsorption was an endothermic process

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