scholarly journals Phosphonium-based Ionic Liquid Modified Activated Carbon from Mixed Recyclable Waste for Mercury(II) Uptake

Molecules ◽  
2019 ◽  
Vol 24 (3) ◽  
pp. 570 ◽  
Author(s):  
Mohamed Habila ◽  
Zeid AlOthman ◽  
Ayman Ghfar ◽  
Maha Al-Zaben ◽  
Ahmed Alothman ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Activated Carbon ◽  
Adsorption Process ◽  
Raw Materials ◽  
Multiwall Carbon Nanotubes ◽  
Multilayer Adsorption ◽  
Modified Activated Carbon ◽  
Inorganic Content ◽  
Pseudo Second Order ◽  
Multiwall Carbon

The contamination of water surfaces by mercury is a dangerous environmental problem due to its toxicity, which leads kidney damage. Activated carbon from mixed recyclable waste modified by phosphonium-based ionic liquid (IL-ACMRW) was therefore prepared and evaluated for Hg(II) remediation. The activated carbon used in this study was prepared from mixed waste, including cardboard, papers and palm wastes as cheap raw materials. The mixed Recyclable Waste Activated Carbon was combined with trihexyl(tetradecyl)phosphonium Bis2,4,4-(trimethylpentyl)phosphinate (Cyphos® IL 104) ionic liquid to form an adsorbent with organic-inorganic content, in order to improve the Hg(II) uptake from aqueous solutions. FTIR confirms the presence of P, C=O and OH after this modification. The adsorption process was investigated and the evaluated results showed that the capacity was 124 mg/g at pH 4, with a contact time of 90 min, an adsorbent dose of 0.4 g/L, and a Hg(II) concentration of 50 mg/L. This Hg(II) adsorption capacity is superior than that reported in the literature for modified multiwall carbon nanotubes. The adsorption of Hg(II) on the modified activated carbon from mixed recyclable waste was found to follow the pseudo second-order kinetics model. Isotherms of adsorption were analyzed via Freundlich and Langmuir models. The results indicated that Freundlich is the best model to describe the process, suggesting multilayer adsorption.

scholarly journals Construction of Novel Polymerizable Ionic Liquid Microemulsions and the In Situ Synthesis of Poly(Ionic Liquid) Adsorbents

Nanomaterials ◽  
2019 ◽  
Vol 9 (3) ◽  
pp. 454 ◽  
Author(s):  
Aili Wang ◽  
Shuhui Li ◽  
Hou Chen ◽  
Ying Liu ◽  
Xiong Peng
Keyword(s):  
Ionic Liquid ◽  
Adsorption Process ◽  
Freundlich Isotherm ◽  
In Situ Synthesis ◽  
Scattering Data ◽  
Order Kinetic ◽  
Order Kinetic Model ◽  
Pseudo Second Order ◽  
Poly Ionic Liquid

This paper reports the successful construction of novel polymerizable ionic liquid microemulsions and the in situ synthesis of poly(ionic liquid) adsorbents for the removal of Zn2+ from aqueous solution. Dynamic light-scattering data were used to confirm the polymerization media and to illustrate the effect of the crosslinker dosage on the droplet size of the microemulsion. FTIR and thermal analysis were employed to confirm the successful preparation of the designed polymers and characterize their thermostability and glass transition-temperature value. The optimization of the adsorption process indicates that the initial concentration of Zn2+, pH, adsorbent dosage and contact time affected the adsorption performance of poly(ionic liquid)s toward Zn2+. Furthermore, our research revealed that the adsorption process can be effectively described by the pseudo second-order kinetic model and the Freundlich isotherm model.

Removal of bromate from water using modified activated carbon

2012 ◽  
Vol 12 (3) ◽  
pp. 398-405 ◽  
Author(s):  
Tongmian Liu ◽  
Fuyi Cui ◽  
Dongmei Liu ◽  
Zhiwei Zhao ◽  
Zhiquan Liu ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Adsorption Capacity ◽  
Electrostatic Interactions ◽  
Adsorption Process ◽  
Chemical Properties ◽  
Modified Activated Carbon ◽  
Surface Basicity ◽  
Adsorption Data ◽  
Physical And Chemical ◽  
And Chemical Properties

Coal-based activated carbon (AC) was treated chemically with nitric acid, sodium hydroxide and ammonia, and its ability to adsorb bromate was investigated. Several techniques were used to characterize the physicochemical properties of these materials, including surface area, pHpzc, and Boehm titration. Results indicated that surface physical and chemical properties can influence the adsorption uptake of bromate on ACs simultaneously. Surface basicity and pHpzc were both found to influence the electrostatic interactions between the bromate ions and the surface of the carbon. A correlation was found between basic groups and the adsorption capacity for bromate. The adsorption capacity of the carbon was found to be linearly proportional to the amount of basic groups on the surface. The bromate adsorption data collected from all the samples were found to fit the Toth isotherm model, indicating that the bromate adsorption process could occur on heterogeneous surfaces.

Scavenging of Nickel(II) from Aqueous Wastes by Adsorption with Granular Activated Carbon (GAC)

2014 ◽  
Vol 612 ◽  
pp. 187-192
Author(s):  
Supriya Gawhane
Keyword(s):  
Heavy Metals ◽  
Activated Carbon ◽  
Precious Metal ◽  
Toxic Elements ◽  
Adsorption Process ◽  
Activated Carbons ◽  
Agricultural Activities ◽  
Pollution Load ◽  
Pseudo Second Order ◽  
Langmuir And Freundlich Models

Due to explosive growth of industrial and agricultural activities, there is rise in pollutants in water including heavy metals and toxic elements. In light of increasing pollution load of environment it is imperative to address this problem by different approaches and means.Of the numerous unit processes, evaluated to control pollution, to a degree, adsorption by GAC is one of the best available broad spectrum technologies. Scavenging of a precious metal such as Nickel, present in aqueous systems can be carried out with or without use of carrier such as 8-hydroxyquinoline (Oxine) and its derivatives on various grades of as received activated carbons. The carrier improves uptake of metal ions by GAC. The adsorption process agrees with the Langmuir and Freundlich models and also obeys pseudo-second order kinetics.

scholarly journals STUDY ON THE ADSORPTION CHARACTERISTICS OF CONGO RED BY SYCAMORE BARK ACTIVATED CARBON

2017 ◽  
Vol 1 ◽  
pp. 64 ◽  
Author(s):  
Li Cong ◽  
Lingling Feng ◽  
Xinlai Wei ◽  
Jie Jin ◽  
Ke Wu
Keyword(s):  
Activated Carbon ◽  
Congo Red ◽  
Room Temperature ◽  
Adsorption Process ◽  
Removal Rate ◽  
Adsorption Properties ◽  
Adsorption Efficiency ◽  
Adsorbent Dosage ◽  
Langmuir Isotherm Model ◽  
Pseudo Second Order

The activated carbon was prepared from sycamore bark by activation of zinc chloride. The absorbing effect of activated carbon on Congo red wastewater is studied. The characteristics of sycamore bark activated carbon were characterized by SEM and BET. The effects of adsorbent dosage, time, and shaking speed on the adsorption properties of Congo red by sycamore bark activated carbon were studied. The isotherm, kinetics, and thermodynamics of adsorption were explored. The results revealed that the activated carbon contain a large apparent mesopores. Adsorption efficiency was increased with enhancing the adsorption dosage and time. The removal rate of Conge red reached to 98.2% under room temperature with adsorbent dosage of 3.0 g/L, adsorption time of 120 min, shaking speed of 60r/min. The adsorption of Congo red on sycamore bark activated carbon was followed Langmuir isotherm model and Lagergren pseudo-second order kinetics model. The adsorption was spontaneous, endothermic, and the entropy was increasing in the adsorption process.

scholarly journals Batch adsorption studies for ketoprofen removal via Dillenia Indica peel activated carbon

2021 ◽  
Vol 920 (1) ◽  
pp. 012010
Author(s):  
F Fadzail ◽  
M Hasan ◽  
Z Mokhtar ◽  
N Ibrahim ◽  
O S An ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Adsorption Process ◽  
Chemical Activation ◽  
Batch Adsorption ◽  
Order Model ◽  
Batch Mode ◽  
Adsorbent Dosage ◽  
Pseudo Second Order ◽  
Dillenia Indica ◽  
Experimental Findings

Abstract Removal of ketoprofen using Dillenia Indica peel activated carbon was investigated using batch adsorption at a laboratory scale. Chemical activation method with the aid of phosphoric acid was utilised in preparing the activated carbon. The adsorption experiments were evaluated using various factors which, are initial concentration, adsorbent dosage, and pH of ketoprofen. The optimum condition was determined to be at pH 6 and adsorbent dosage of 0.4 g with a most KTP uptake of 8.354 mg/g. The experimental findings showed that adsorption is favorable at lower pH. Isotherm studies were conducted and the data indicated that Langmuir isotherm was well fitted to the adsorption process and the pseudo-second-order model was more preferable in simulating the kinetic process. In essence, Dillenia Indica peel activated carbon was proven as being a favourable adsorbent for the uptake of ketoprofen in batch mode.

scholarly journals Adsorption of cadmium ions from simulated battery waste water by polyethylene polyamine modified activated carbon

2021 ◽  
Author(s):  
Baoying Wang ◽  
Jingming Lan ◽  
Junli Pu ◽  
Xiu Liu ◽  
Bonglin Gong
Keyword(s):  
Waste Water ◽  
Activated Carbon ◽  
Potassium Hydroxide ◽  
Competitive Adsorption ◽  
Chemical Plants ◽  
Modified Activated Carbon ◽  
Cadmium Ions ◽  
Structure And Morphology ◽  
Polyethylene Polyamine ◽  
Pseudo Second Order

Abstract The objective of this work was to study the treatment of waste water containing cadmium ions (Cd2+). Activated carbon (AC) was modified with potassium hydroxide (KOH) and polyethylene polyamine (PEPA). The structure and morphology of the modified AC was characterized. The effect of pH on adsorption was investigated, and the binary competitive adsorption and the reusability of the modified AC were studied. Subsequently the modified AC was used as an adsorbent for the removal of Cd2+ from wastewater. The adsorption capacity of optimized modified AC was 9.7 times that of unmodified AC. Kinetic adsorption curves were in accordance with pseudo-second-order kinetics, and the isothermal curves were in accordance with the Langmuir equation. The results indicate that the AC has a potential in the treatment of the waste water containing Cd2+ discharged from chemical plants during battery manufacturing.

scholarly journals Ionic liquid functionlized on multiwall carbon nanotubes for nickel and lead determination in human serum and urine samples by micro solid-phase extraction

2021 ◽  
Vol 4 (02) ◽  
pp. 72-85
Author(s):  
Arezou Lari ◽  
Nafiseh Esmaeili ◽  
Homanaz Ghafari
Keyword(s):  
Carbon Nanotubes ◽  
Ionic Liquid ◽  
Liquid Phase ◽  
Solid Phase Extraction ◽  
Human Serum ◽  
Solid Phase ◽  
Multiwall Carbon Nanotubes ◽  
Urine Samples ◽  
Phase Extraction ◽  
Multiwall Carbon

In this study, a novel synthesis adsorbent, 1-(3-aminopropyl)-3-methylimidazolium hexafluorophosphate functionlized on multiwall carbon nanotubes ([Apmim][PF6]-MWCNTs, IL@MWCNTS) was used for nickel/lead (Ni/Pb) extraction and determination by dispersive ionic liquid micro solid-phase extraction (DIL-μ-SPE) coupled to electrothermal atomic absorption spectrometry (ET-AAS). After dilution of 20 mg of IL@MWCNTS in 200 μL of acetone, the mixture was injected to 10 mL of human serum/urine samples at pH of 8.0. After sonication for 5 min, the Ni(II) / Pb(II) were extracted by ionic liquid phase and then centrifuged for 2.5 min. The upper liquid phase set aside and Ni(II) / Pb(II) loaded in adsorbent were back-extracted by acidic solution at pH=2-3. Finally, the concentration of total nickel and lead was determined by ET-AAS. By optimizing, the limit of detection, linear range, and enrichment factor for nickel and lead were obtained (0.05 μg L−1; 0.1 μg L−1), (0.2-5.8 μg L−1; 0.4-30 μg L−1) and 24.7; 5.1, respectively (RSD less than 5%). Also, the capacity absorption of IL@MWCNTS for nickel and lead ions were achieved 149.3 mg g-1 and 162.5 mg g-1, respectively.  The DIL-μ-SPE procedure was validated for nickel and lead extraction by spiking of real samples and ICP-MS analyzer.

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