Copper Ions Adsorption Using Aminated Activated Carbons

2019 ◽  
Author(s):  
L.M. Grishchenko ◽  
V.E. Diyuk ◽  
G.G. Tsapyuk ◽  
R. Mariychuk ◽  
O.V. Mischanchuk ◽  
...  
Keyword(s):  
Activated Carbons ◽  
Copper Ions

scholarly journals Adsorptive Removal of Copper Ions from Polluted Water Using Sorbents Derived from Cordia dichotoma, Albizia thompsonii and Polyalthia cerasoides Plants

2020 ◽  
Vol 32 (10) ◽  
pp. 2653-2659
Author(s):  
Tumma Prasanna Kumar Reddy ◽  
Sayana Veerababu ◽  
Malireddy Venkata Sai Mohan Reddy ◽  
Kunta Ravindhranath
Keyword(s):  
Activated Carbons ◽  
Copper Ions ◽  
Industrial Effluent ◽  
Industrial Effluents ◽  
Liquid Interface ◽  
Polluted Water ◽  
Physico Chemical ◽  
Solid Liquid Interface ◽  
Solid Liquid ◽  
Direct Applicability

Three different activated carbons as effective adsorbents were prepared by digesting the stems of Cordia dichotoma, Albizia thompsonii and Polyalthia cerasoides plants in conc. H2SO4 for Cu2+ removal from wastewater. The sorption natures of these sorbents are optimized with respect to various physico-chemical characteristics for the maximum Cu2+ removal using simulated waters. Cordia dichotoma (CDAC), Albizia thompsonii (ATAC) and Polyalthia cerasoides (PCAC) activated carbons show good sorption capacities of values: 97.0, 76.8 and 66.7 mg/g, respectively in a wide pH ranges. Unlike that of other two activated carbons, Cordia dichotoma activated carbon is effective even in acid conditions, indicting its direct applicability to Cu-based industrial effluents which are generally acidic in nature. Interference of two fold excess of co-ions is minimal. The established extraction conditions for the removal of more than 95.0% from 10 ppm Cu2+ solution at room temperature (303 K) using CDAC as sorbent are: pH: 3-9; time of equilibration: 1 h; sorbent dosage: 0.100 g/100 mL; with ATAC: pH: 6-9; time of equilibration: 1.5 h and sorbent dosage: 0.125 g/100 mL; and with PCAC: pH: 6-9; time of equilibration: 2.0 h and sorbent dosage 0.50 g/100 mL. Spent adsorbents can be regenerated and reused until four cycles with minimal loss of adoption capacities. Thermodynamic studies revealed that the sorption is spontaneous and endothermic in nature. Further, the ΔH value for CDAC is 30.156 KJ/mol; it indicates the strong chemisorption and may be through reduction to Cu+/Cu and/or complex formation between Cu2+ and functional groups of the adsorbent. The ΔH values of other two activated carbons, ATAC and PCAC, indicated that the sorption is mainly physical with strong inclination towards chemical nature. Positive ΔS values of all the three sorbents, emphasizes the disorder or randomness at the solid-liquid interface and hence favourable conditions for more penetration of Cu2+ into the surface layers of the adsorbent and hence, more removal of Cu2+ ions. The negative ΔG values indicate that the sorption forces are good enough to cross the potential barrier at the solid-liquid interface and hence the process is spontaneous. The prepared three activated carbons were also successfully applied to industrial effluent and polluted lake samples.

Adsorption kinetics and mechanisms of copper ions on activated carbons derived from pinewood sawdust by fast H3PO4 activation

2018 ◽  
Vol 25 (8) ◽  
pp. 7907-7915 ◽  
Author(s):  
Xinyuan Gao ◽  
Long Wu ◽  
Qing Xu ◽  
Wei Tian ◽  
Zhanyong Li ◽  
...  
Keyword(s):  
Adsorption Kinetics ◽  
Activated Carbons ◽  
Copper Ions ◽  
H3po4 Activation

scholarly journals INVESTIGATION OF THE THERMODYNAMIC CHARACTERISTICS OF THE EXTRACTION OF COPPER IONS FROM AQUEOUS SOLUTIONS USING ACTIVATED CARBON

2021 ◽  
pp. 68-73
Author(s):  
И.К. Гиндулин ◽  
В.В. Юрченко
Keyword(s):  
Adsorption Process ◽  
Activated Carbons ◽  
Copper Ions ◽  
Thermodynamic Characteristics ◽  
Optimal Level ◽  
Nanoporous Materials ◽  
Carbon Adsorbents ◽  
Kinetic Characteristics ◽  
Copper Adsorption ◽  
Adsorption Activity

Изучение термодинамических и кинетических характеристик позволяет более эффек- тивно использовать углеродные адсорбенты в технологических процессах, чем поддерживается тех- нология их использования на оптимальном уровне. В работе изучалась адсорбционная активность углеродных нанопористых материалов, рассчитывались кинетические характеристики процесса ад- сорбции, термодинамические характеристики (энергия Гиббса, энтальпия, константа адсорбции) адсорбции ионов меди на активных углях, полученных на установках (модульная пиролизная реторт- ная установка) и УВП (углевыжигательная печь). Установлено, что процесс идёт самопроизвольно, характер адсорбционного взаимодействия экзотермический. Адсорбционные равновесие достигается меньше чем за 15 мин. The study of thermodynamic and kinetic characteristics allows more efficient use of carbon adsorbents in technological processes. Thus, keeping their use at an optimal level. The adsorption activity of carbon nanoporous materials was studied, the kinetic characteristics of the adsorption process, thermodynamic characteristics (Gibbs energy, enthalpy, adsorption constant) of copper adsorption on activated carbons obtained at MPRP and CK installations were calculated in this work. It was found that the process is spontaneous (G <0). The nature of the adsorption behavior is exothermic. Adsorption equilibrium is achieved in less than 15 minutes.

Study of the physical and chemical characteristics of a range of chemically treated, lignite based carbons

1997 ◽  
Vol 35 (7) ◽  
pp. 21-27 ◽  
Author(s):  
Orna Duggan ◽  
Stephen J. Allen
Keyword(s):  
Activated Carbons ◽  
Copper Ions ◽  
Mercury Porosimetry ◽  
Metal Compounds ◽  
Surface Areas ◽  
Preferential Adsorption ◽  
Chemical Morphology ◽  
Red Dye ◽  
Langmuir Constants ◽  
Physical And Chemical

It is already known that activated carbons may be developed by chemically treating the adsorbent precursor to produce a carbon which displays improved adsorption characteristics and possibly preferential adsorption of one particular molecule over another. For the purposes of this study, a selection of carbons produced by the chemical treatment of N.I. lignite were studied. A range of transition metal compounds were used for the study as oxo-complexes of these metals have previously been associated with micropore widening in activated charcoal cloth. The adsorption of different concentrations of aqueous solutions of phenol, basic red dye and copper ions onto each carbon was examined. The adsorption equilibrium isotherms obtained for the carbons were plotted to obtain the Freundlich and Langmuir constants for each system. The adsorption capacity of each carbon was found to depend on its method of activation. In order to make a connection between the adsorptive behaviour of each carbon and its method of treatment, the physical and chemical morphology of the carbon was studied. Gas sorption on the Fisons instruments Sorptomatic 1900 and mercury porosimetry on the Fisons instruments Porosimeter 2000 were the methods used to study the micro-, meso- and macropore volumes, surface areas and pore radius distributions of the carbon samples. Infra-red spectroscopy showed that only minor changes occurred in the surface functional groups between the untreated lignite and the carbons and also between carbons themselves. Finally data obtained for these carbons was compared with the results of a previous study of untreated Northern Ireland lignite and lignite chars.

scholarly journals ENERGY SAVING APPROACH TO CHEMICAL PROCESSING OF LIGNOCELLULOSIC FEEDSTOCK INTO SORPTIVE MATERIALS

2017 ◽  
pp. 49-52
Author(s):  
N.V. Sych ◽  
S.I. Trofymenko ◽  
M.M. Tsyba ◽  
V.M. Vikarchuk
Keyword(s):  
Activated Carbons ◽  
Copper Ions ◽  
Total Pore Volume ◽  
Microwave Treatment ◽  
Raw Material ◽  
Bet Surface Area ◽  
Acid Activation ◽  
Power Efficient ◽  
Lignocellulosic Feedstock ◽  
Pore Size Distributions

High porous activated carbons were prepared by microwave-induced phosphoric acid activation of lignocellulosic raw material. It was established that the parameters of porous structure of carbons obtained are increased with increasing of treatment duration and reach maximum under 3–5 min staying. Maximum BET surface area achieved during the microwave treatment with energy load 120 Wt.min/(g.mL) is 1085 m2/g. Total pore volume reaches almost 0,7 cm3/g. Pore size distributions indicates that carbons consists of micropores (0.9–1.1 nm) and mesopores with size 4 nm. Obtained carbons have high adsorption capacity towards copper ions from aqueous solutions at pH £ 4. The results proved that this process is rapid, power-efficient and economic. Bibl. 10, Fig. 3, Tab. 1.

scholarly journals Modeling of copper ions adsorption onto oxidative-modified activated carbons

2017 ◽  
Vol 35 (9-10) ◽  
pp. 884-900 ◽  
Author(s):  
LM Grishchenko ◽  
VE Diyuk ◽  
OP Konoplitska ◽  
VV Lisnyak ◽  
RT Maryichuk
Keyword(s):  
Activated Carbons ◽  
Copper Ions ◽  
Modified Activated Carbons

The Effect of Copper Ions on Clot Lysis Time in the Fibrinolytic Assay of Streptokinase

1965 ◽  
Vol 13 (02) ◽  
pp. 477-483
Author(s):  
Alwin B. Bogert
Keyword(s):  
Copper Ions ◽  
Borate Buffer ◽  
Fibrinolytic System ◽  
Clot Lysis ◽  
Distilled Water ◽  
Naturally Occurring ◽  
Lysis Time ◽  
Low Levels ◽  
Effect Of Copper ◽  
Clot Lysis Time

SummaryExperiments were conducted to determine why different lots of Borate Buffer reagent affect the clot lysis times obtained in the fibrinolytic assay of Streptokinase. Minerals naturally occurring in distilled water were screened individually to determine their influence on lysis. Copper was found to have a very pronounced effect in this regard on the fibrinolytic system in that low levels reduce the lysis time and high levels increase it.

The role of copper ions in hydrogen peroxide bleaching: Their origin, removal, and effect on pulp quality

TAPPI Journal ◽  
2012 ◽  
Vol 11 (7) ◽  
pp. 37-46 ◽  
Author(s):  
PEDRO E.G. LOUREIRO ◽  
SANDRINE DUARTE ◽  
DMITRY V. EVTUGUIN ◽  
M. GRAÇA V.S. CARVALHO
Keyword(s):  
Hydrogen Peroxide ◽  
Copper Ions ◽  
Peroxide Bleaching ◽  
Metals Removal ◽  
Peroxide Decomposition ◽  
Equipment Corrosion ◽  
And Performance ◽  
And Control ◽  
Main Effects

This study puts particular emphasis on the role of copper ions in the performance of hydrogen peroxide bleaching (P-stage). Owing to their variable levels across the bleaching line due to washing filtrates, bleaching reagents, and equipment corrosion, these ions can play a major role in hydrogen peroxide decomposition and be detrimental to polysaccharide integrity. In this study, a Cu-contaminated D0(EOP)D1 prebleached pulp was subjected to an acidic washing (A-stage) or chelation (Q-stage) before the alkaline P-stage. The objective was to understand the isolated and combined role of copper ions in peroxide bleaching performance. By applying an experimental design, it was possible to identify the main effects of the pretreatment variables on the extent of metals removal and performance of the P-stage. The acid treatment was unsuccessful in terms of complete copper removal, magnesium preservation, and control of hydrogen peroxide consumption in the following P-stage. Increasing reaction temperature and time of the acidic A-stage improved the brightness stability of the D0(EOP)D1AP bleached pulp. The optimum conditions for chelation pretreatment to maximize the brightness gains obtained in the subsequent P-stage with the lowest peroxide consumption were 0.4% diethylenetriaminepentaacetic acid (DTPA), 80ºC, and 4.5 pH.

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