Cellulose with bidentate chelating functionality: An adsorbent for metal ions from wastewater

A cellulose derivative with multiple coordination sites for metals composed of cellulose powder and 1,2-pheneylnediamine was synthesized and evaluated as an adsorbent for metal ions from wastewater. The cellulose powder was generated from the solid waste of the olive industry. The adsorption efficiency of the cellulose amine polymer toward Fe(III) and Pb(II) was investigated as a function of adsorbent dose, temperature, pH, and time. The adsorption parameters that lead to excellent adsorption efficiency were determined. In addition, the polymer showed an excellent extraction efficiency toward approximately 20 metal ions present in a sewage sample. The cellulose amine derivative had several coordination sites that included amine, hydroxyl, and aromatic groups. The diversity and frequency of the coordination sites explained the high efficiency of the polymer for metal ions. The thermodynamic analysis results supported the spontaneous adsorption efficiency of the polymer at room temperature. The adsorption process fit well with the Langmuir adsorption isotherm model.

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Cellulose powder functionalized with phenyl biguanide: Synthesis, cross-linking, metal adsorption, and molecular docking

BioResources ◽

10.15376/biores.16.4.7263-7282 ◽

2021 ◽

Vol 16 (4) ◽

pp. 7263-7282

Author(s):

Othman Hamed ◽

Majdi Qaisi ◽

Ibrahim Abushqair ◽

Avni Berisha ◽

Omar Dagdag ◽

...

Keyword(s):

Metal Ions ◽

Adsorption Process ◽

Polymer Surface ◽

Toxic Metal ◽

Chelating Agent ◽

Ion Concentration ◽

Cellulose Powder ◽

Dynamic Simulations ◽

Promising Alternative ◽

The Cross

A cellulose polymer functionalized with an amine chelating agent was designed and synthesized in a three-step process that involved oxidizing cellulose powder into dialdehyde cellulose, reacting cellulose dialdehyde with phenyl biguanide to create an imine linkage between the two reactants, and reducing the imine linkage to an amine. The cellulose amine polymer was cross-linked with glycerol digycidyl ether and evaluated as an adsorbent of toxic metal ions from wastewater. The adsorption efficiency of the cross-linked cellulose amine polymer toward Pb(II) and Cu(II) was evaluated as a function of the adsorbent dose, pH, time, temperature, and initial ion concentration. The cross-linked cellulose amine polymer showed an excellent efficiency toward over 15 metal ions present in a real sample of sewage. Thermodynamic analysis showed a spontaneous adsorption of metal ions on the polymer at room temperature. Monte Carlo and Molecular Dynamic simulations showed that the Cu(II) and Pb(II) ions adsorbed onto the cellulose amine polymer surface in a considerable amount, which agreed with the experimental and thermodynamic data. The negative free energy value confirmed the spontaneity of the adsorption process. As such, cross-linked cellulose amine polymers could be a promising alternative to current commercial adsorbents.

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Different Insights into Silicate Rectorite Modification and Its Role in Removal of Heavy Metal Ions from Wastewater

Minerals ◽

10.3390/min10020176 ◽

2020 ◽

Vol 10 (2) ◽

pp. 176 ◽

Cited By ~ 1

Author(s):

Ya Gao ◽

Hao Jiang ◽

Xianyuan Li ◽

Sultan Ahmed Khoso ◽

Guoyuan Xiang ◽

...

Keyword(s):

Heavy Metal ◽

Metal Ions ◽

Heavy Metal Ions ◽

Adsorption Process ◽

Underlying Mechanism ◽

Xps Analysis ◽

Adsorption Efficiency ◽

Removal Capacity ◽

Chloride Hexahydrate ◽

Ferric Chloride Hexahydrate

In the field of water management, the separation of metal contaminants from wastewater is very important and challenging. This study systematically investigated the effect and underlying mechanism of silicate rectorite (REC) on the removal of heavy metal ions (Cr(VI) and Pb(II)) from wastewater. The adsorption and removal capacity of REC was further improved by its novel modification with ferric chloride hexahydrate. Compared to natural REC, the modified rectorite (Fe-REC) showed comparatively superior adsorption efficiency for both Cr(VI) and Pb(II) due to the chemisorption of Fe3+ on the REC surface as its oxidation state (Fe–O, Fe–OH, Fe–OOH). Adsorption on Cr(VI) attributed to the reaction between iron hydroxy complexes (FeOH2+, Fe(OH)2+ and Fe(OH)3(aq)) and Cr(VI) species (HCrO4− and CrO42−) in the aqueous solution. This reaction was perfectly consistent with the binding energy shifts in O 1s and Fe 2p species, as reflected by XPS analysis. While, the existence of –Al–OH and –Si–OH in silicate REC slurry reacted with PbOH+ colloids produced from lead ions hydrolysis to promote Pb(II) adsorption. Zeta potential after modification and removal occurred to shift positively or negatively to testify the adsorption of Fe3+ and heavy metal ions. Freundlich and Langmuir isotherms conformed adsorption process for Cr(VI) and Pb(II), respectively.

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Synthesis of adsorbent materials from FELDSPAR for removal of ammonium in water

Science and Technology Development Journal - Natural Sciences ◽

10.32508/stdjns.v4i1.1002 ◽

2020 ◽

Vol 4 (1) ◽

pp. first

Author(s):

Nguyen Thanh Tam ◽

Nguyen Hoai Phuong Duy ◽

Tran Thi Phuong Thuy ◽

Võ Thi Thanh Tien ◽

Tran Cong Khanh

Keyword(s):

Adsorption Process ◽

Langmuir Adsorption Isotherm ◽

Adsorption Efficiency ◽

Experimental Conditions ◽

Initial Concentration ◽

Langmuir Adsorption ◽

Surface Areas ◽

Removal Capacity ◽

Al Powder ◽

Adsorbent Materials

In this study, adsorbent materials from natural feldspar were fabricated for application in +NH4 removal. Raw, pretreated by HCl 3M, and modified feldspar by NaOH and aluminum (Al powder, Al(OH)3, and AlCl3.6H2O) were used. Feldspar was modified under different experimental conditions including without calcination and calcinated at 500ºC and 700ºC. The influence of various operating parameters consisting of material size, adsorption time, +NH4 initial concentration and material dosage were investigated. Adsorbent materials < 0.1 mm in size showed the highest adsorption efficiency. Subsequently materials with size of < 0.1 mm were used for the following studies to investigate the affect of other parameters on +NH4 adsorption process. The highest removal efficiency (31.10%) and removal capacity (21.80 mg/g) were obtained by modified feldspar by NaOH and AlCl3.6H2O with calcination at 700ºC at +NH4 initial concentration of 5 ppm. Results from the scanning electron microscope (SEM) showed the differences on surfaces of adsorption materials. Modified feldspar had a clean surface and more tiny pores compared to those of raw and pretreated feldspar resulting in an increased surface area. Consequently +NH4 adsorbent efficiency and removal capacity were increased. By BET (Brunauer, Emmett and Teller) the specific surface areas of adsorbent materials were analyzed and the surface areas of raw, pretreated and modified feldspar were 0.484 m2/g, 0.988 m2/g and 2.024 m2/g, respectively. +NH4 adsorbent mechanisms of all raw, pretreated, and modified feldspar materials were found to follow the Langmuir adsorption isotherm with the correlation coefficient R2 = 0.989 which described the monolayer type of the adsorption.

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Layered Rare-Earth Hydroxide Unilameller Nanosheets: Synthesis, Characterization, and Adsorption

Journal of Chemistry ◽

10.1155/2020/8923871 ◽

2020 ◽

Vol 2020 ◽

pp. 1-11

Author(s):

Solomon Omwoma ◽

Adongo Stephen Odongo ◽

Zablon Otieno ◽

Silas Lagat ◽

Joseph Owuor Lalah

Keyword(s):

Rare Earth ◽

High Efficiency ◽

Colloidal Solution ◽

Aqueous Media ◽

Significant Loss ◽

Adsorption Efficiency ◽

Material Synthesis ◽

Langmuir Adsorption ◽

Sorbent Material ◽

Adsorption Curve

Unilameller nanosheets with a lateral dimension of one nanometer have been isolated from a colloidal solution of europium-containing layered rare-earth hydroxide (LRH) material by the flocculation method. The nanosheets were achieved by changing pH of the colloidal solution from 6.7 to 11.5. The resultant flocculated nanosheets show high efficiency in sorption of fluoride anions from aqueous media (40 mmol/g), providing a potentially useful sorbent material for water purification technology. The sorbent material is demonstrated to be reusable for at least ten times without a significant loss of adsorption efficiency. And the results fit the Langmuir adsorption curve, indicating the chemisorption nature of the nanosheets. Most importantly, the isolated nanosheets are expected to widen the applicability and flexibility in material synthesis using two-dimensional nanomaterials.

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STUDI KINETIKA ADSORPSI ION Fe (III) MENGGUNAKAN LIMBAH AMPAS SAGU

Molluca Journal of Chemistry Education (MJoCE) ◽

10.30598/mjocevol9iss1pp9-17 ◽

2019 ◽

Vol 9 (1) ◽

pp. 9-17

Author(s):

Batseba Taihuttu ◽

V Kayadoe ◽

A Mariwy

Keyword(s):

Heavy Metal ◽

Metal Ions ◽

Adsorption Capacity ◽

Contact Time ◽

Heavy Metal Ions ◽

Adsorption Process ◽

Second Order ◽

Adsorption Efficiency ◽

Adsorption Study ◽

Pseudo Second Order

Adsorption study of the adsorption of heavy metal ions from Fe (III) using sago dregs waste was carried out. adsorption was carried out in batches, with the mass of adsorbent is 1 g and the concentration of Fe (III) ion is 10 ppm. in this study variations in contact time were 60, 90, 120, 150 and 180 minutes to determine the kinetic suitable for the adsorption process of ion Fe (III) and the capacity and efficiency of sago dregs adsorption. The results showed that the adsorption of ion fe (III) using sago dregs followed pseudo second-order kinetics with R2 values that were closer to 1 that is 0,9651. adsorption of ion Fe (III) at optimum contact time of 90 minutes with adsorbent mass of 1 g obtained by adsorption capacity 0,3211 mg/g and the adsorption efficiency is 64,2%.

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Magnetic Multiwall Carbon Nanotube Decorated with Novel Functionalities: Synthesis and Application as Adsorbents for Lead Removal from Aqueous Medium

Processes ◽

10.3390/pr8080986 ◽

2020 ◽

Vol 8 (8) ◽

pp. 986

Author(s):

Ghadir Hanbali ◽

Shehdeh Jodeh ◽

Othman Hamed ◽

Roland Bol ◽

Bayan Khalaf ◽

...

Keyword(s):

Carbon Nanotube ◽

Metal Ions ◽

Industrial Development ◽

Toxic Metal ◽

Modern Society ◽

Lead Removal ◽

Multiwall Carbon Nanotube ◽

Adsorption Efficiency ◽

Adsorption Parameters ◽

Multiwall Carbon

Water pollution is one of the major challenges facing modern society because of industrial development and urban growth. This study is directed towards assessing the use of multiwall carbon nanotube, after derivatization and magnetization, as a new and renewable absorbent, to remove toxic metal ions from waste streams. The adsorbents were prepared by, first oxidation of multiwall carbon nanotube, then derivatizing the oxidized product with hydroxyl amine, hydrazine and amino acid. The adsorbents were characterized by various techniques. The adsorption efficiency of the multiwall carbon nanotube adsorbents toward Pb(II) was investigated. The effect of adsorbent’s dose, temperature, pH, and time on the adsorption efficiency were studied and the adsorption parameters that gave the highest efficiency were determined. The derivatives have unique coordination sites that included amine, hydroxyl, and carboxyl groups, which are excellent chelating agents for metal ions. The thermodynamic and kinetic results analysis results indicated spontaneous adsorption of Pb(II) by the multiwall carbon nanotube adsorbents at room temperature. The adsorption process followed pseudo-second-order and Langmuir isotherm model. The adsorbents were regenerated using 0.1 N HCl.

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Removal of Heavy Metals from Textile Wastewater Using Sugarcane Bagasse Activated Carbon

International Journal of Engineering & Technology ◽

10.14419/ijet.v7i4.30.22066 ◽

2018 ◽

Vol 7 (4.30) ◽

pp. 112 ◽

Cited By ~ 2

Author(s):

Mohd Adib Mohammad Razi ◽

Adel Al- Gheethi ◽

Izzatul Ashikin ZA

Keyword(s):

Heavy Metals ◽

Activated Carbon ◽

Metal Ions ◽

Sugarcane Bagasse ◽

Contact Time ◽

Adsorption Process ◽

Textile Wastewater ◽

Attractive Alternative ◽

Adsorption Efficiency ◽

Adsorbent Dosage

Excessive release of textile wastewater with heavy metals into environment has posed a great problem to the natural water system. The efficiency of the adsorption process to remove heavy metals depend on the adsorbent. The commercial activated carbon is one of the most efficient adsorbent, but the limitation lies in the high cost. Therefore, the present study aimed to investigate the efficiency of sugarcane bagasse activated carbon modified by phosphoric acid as adsorbent for the removal of zinc (Zn) and Ferum (Fe) from the textile wastewater. The adsorption process was conducted using batch method as a function for pH (2-7), contact time (30 min to 24 h) and adsorbent dosage (0.6 to 6g). The final concentrations of the metal ions were determined by ICP-MS. The results revealed that the adsorption efficiency increased with the contact time, the optimum time was recorded after 2 h. The removal percentage of Zn and Fe associated with the adsorbent dosage due to the greater surface area with optimum value of 4.0 g. The increasing of pH from 2 to 6 correlated with high adsorption efficiency, with the optimum condition at pH 5. The maximum percentage removal of Fe, Zn was 80%. These findings indicated that the SBAC is an attractive alternative adsorbent material for the metal ions removal in textile wastewater.

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REMOVAL OF HEAVY METAL Cr (II), Ni (II), Cu (II), Zn (II), Cd (II), Pb (II) IONS FROM AQUEOUS SOLUTION BY MENTHA PIPERITA EXTRACT

10.32006/eeep.2020.2.1520 ◽

2020 ◽

pp. 15-20

Author(s):

Ersin Yucel ◽

Mine Yucel

Keyword(s):

Aqueous Solution ◽

Metal Ions ◽

High Efficiency ◽

Correlation Coefficients ◽

Langmuir Model ◽

Mentha Piperita ◽

Freundlich Model ◽

Biosorption Capacity ◽

Peppermint Extract ◽

The Stability

In this study, the usage of the peppermint (Mentha piperita) for extracting the metal ions [Mg (II), Cr (II), Ni (II), Cu (II), Zn (II), Cd (II), Pb (II)] that exist at water was investigated. In order to analyze the stability properties, Langmuir, Freundlich, Temkin and Dubinin-Radushkevich isotherms were used at removing the metal ions and the highest correlation coefficients (R2) were obtained at Langmuir isotherm. Therefore, it is seen that the Langmuir model is more proper than the Freundlich model. However, it was found that the correlation coefficients of removing Ni and Cd is higher at Freundlich model than Langmuir and low at Dubinin-Radushkevich isotherm. It is established that the biosorption amount increase depends on the increase of biosorbent and it can be achieved high efficiency (95%) even with small amount (0.6 mg, peppermint extract) at lead ions. It is also determined that the peppermint extracted that is used at this study shows high biosorption capacity for metal ions and can be used for immobilization of metals from polluted areas.

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Adsorption process and mechanism of heavy metal ions by different components of cells, using yeast (Pichia pastoris) and Cu2+ as biosorption models

RSC Advances ◽

10.1039/d0ra09744f ◽

2021 ◽

Vol 11 (28) ◽

pp. 17080-17091

Author(s):

Xinggang Chen ◽

Zhuang Tian ◽

Haina Cheng ◽

Gang Xu ◽

Hongbo Zhou

Keyword(s):

Heavy Metal ◽

Pichia Pastoris ◽

Metal Ions ◽

Cell Walls ◽

Heavy Metal Ions ◽

Adsorption Process ◽

Yeast Pichia Pastoris ◽

Adsorption Sites

The Cu2+ first bound to the outer mannan and finally entered the cytoplasm. During the whole adsorption process, the number of adsorption sites in the outer and middle cell walls was the largest, and then gradually decreased.

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