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Journal articles on the topic 'Adsorption, copper'

Author: Grafiati

Published: 4 June 2021

Last updated: 4 February 2022

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1

Sabadash, Vira, Oksana Mylanyk, Oksana Matsuska, and Jaroslaw Gumnitsky. "Kinetic regularities of copper ions adsorption by natural zeolite." Chemistry & Chemical Technology 11, no. 4 (2017): 459–62. http://dx.doi.org/10.23939/chcht11.04.459.

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2

Jordão, Cláudio Pereira, César Reis, Carlos Roberto Bellato, Gulab Newandram Jham, and José Luis Pereira. "Adsorption of Cu2+ ions on humic acids." Rem: Revista Escola de Minas 54, no. 2 (2001): 109–14. http://dx.doi.org/10.1590/s0370-44672001000200006.

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Commercial samples of humic acids (Fluka AG) were used to evaluate the adsorption behaviour of Cu2+ ions. The mathematical model described by Langmuir's adsorption equation was applied and the values of the maximum adsorption capacity b and those of the constant related to the bonding energy a were obtained. Aliquots of copper nitrate solutions with different copper concentrations were added to the humic acid suspensions at constant pH values (4.0 and 5.0). The Langmuir isotherms presented two distinct adsorption regions, showing that the adsorptive phenomenon occurs in two distinct steps acco

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3

Xie, Baoshan, Yi Hou, and Youming Li. "Modified lignin nanosphere adsorbent for lead and copper ions." BioResources 16, no. 1 (2020): 249–62. http://dx.doi.org/10.15376/biores.16.1.249-262.

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Heavy metal ions in wastewater have negative effects on humans and the environment. In this paper, the adsorption of lead and copper ions by modified eucalyptus lignin nanosphere (ECLNPs) was studied. The spherical alkali-lignin particles had a diameter of 50 nm, abundant carboxyl groups of 0.66 mmol/g, and relatively high adsorption performance. The equilibrium adsorption capacities of Pb(II) and Cu(II) by ECLNPs were 126.0 mg/g and 54.4 mg/g, respectively. Both Pb(II) and Cu(II) adsorptive processes fitted a pseudo-second-order kinetics model. In the simultaneous adsorption process of Pb(II)

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4

Wu, Zeng Ling, Wei Zhang Kong, Jin Yan Liu, Zhi Wu, Shui Ping Zhong, and Yong Guan Zhu. "Adsorption Kinetics and Surface Characterization of Microorganisms Grown under Different Conditions." Advanced Materials Research 1130 (November 2015): 519–23. http://dx.doi.org/10.4028/www.scientific.net/amr.1130.519.

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The adsorption of bacteria onto minerals is the premise for bioleaching and plays an important role in minerals oxidation. Understanding of the adsorption kinetics onto the surface will give information on the effectiveness of bioleaching. Three kinds of mixed bacteria (Acidithiobacillus ferrooxidans, Leptospirillum ferrooxidans, Sulfobacillus) were cultured in different substrates - copper concentrate, elemental sulfur and ferrous iron and adsorbed onto different solid surface of elemental sulfur, silica and copper concentrate. Adsorption kinetics was examined and surface properties were inve

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5

Lipovský, Marek, Maroš Sirotiak, and Maroš Soldán. "Removal Of Copper From Aqueous Solutions By Using Natural And Fe-Modified Clinoptilolite." Research Papers Faculty of Materials Science and Technology Slovak University of Technology 23, no. 36 (2015): 33–40. http://dx.doi.org/10.1515/rput-2015-0004.

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Abstract Removal of copper from aqueous solution on the natural and modified clinoptilolite was studied under static conditions. Batch adsorptions of copper were performed to investigate the effects of contact time and initial metal ion concentration. The Freundlich and Langmuir adsorption isotherms were used to analyse the experimental data. The kinetic analyses of the adsorption processes were performed using the pseudo-first-order and pseudo-second-order kinetic models.

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6

Liu, Li Bo, Li Zhang, and Wei Ming Gong. "Study on the Copper Ion Removal from Water by Adsorption." Advanced Materials Research 1010-1012 (August 2014): 876–79. http://dx.doi.org/10.4028/www.scientific.net/amr.1010-1012.876.

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The feasibility of using oyster shell powder for the removal of Cu2+ from aqueous solutions was investigated employing an adsorption technique. Oyster shell powder with different size was prepared. Its adsorption property to copper ions was studied. It was found that in an aqueous medium of pH 7.0, the adsorptive capacity of copper ions increased gradually with the increase of adsorption time, the addition amount of oyster shell powder and decrease of particle size. Compared with other treatment methods, this method has advantages of simple process, low cost, good treatment effect, it has a go

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7

Guo, Jun Jing, and Wen Bin Chen. "The Adsorption of Copper Ions by Sodium Alginate Immobilized Bacillus Subtilis Body and Purify Copper of Mine Wastewater." Advanced Materials Research 356-360 (October 2011): 1469–74. http://dx.doi.org/10.4028/www.scientific.net/amr.356-360.1469.

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In this study, calcium alginate immobilized bacillus subtilis body was used as an adsorbent for the aim of adsorpting Cu(Ⅱ) ions form the aqueous solutions, On sutiable condition, this study use purely bacteria eliminate other bacteria come in life-form bacteria .Through the orthogonal experiment obtains the optimum condition of sodium alginate fossilization bacillus subtilus pellet to the Cu(Ⅱ) adsorption, The biosorption efficiency was strongly influenced by the pH and the initial concentration ofthe Cu(Ⅱ) aqueous solutions. We also discusses the influence of single factor to the sodium algi

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8

Chen, Lu, Qi Gong, Xiao Ling Wei, and Qian Hou. "Analysis of Iron in Copper, Copper Oxide and Copper Nitrate by Solid-Phase Extraction ICP-AES Method." Advanced Materials Research 396-398 (November 2011): 238–40. http://dx.doi.org/10.4028/www.scientific.net/amr.396-398.238.

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The reasearch shows that when the mass ratio of copper to iron is equal or greater than 100, the influence of copper on the determination of trace iron can not be ignored. To eliminate the interference, the polypropylene radical strong base anion ion exchange fiber was taken as the solid phase extraction solvent. Extraction and separation of trace iron (Ⅲ) from solution copper (Ⅱ) by the extraction solvent was studied. The extraction conditions including of adsorption and elution were optimized. The strong base anion ion exchange fiber was put into the analysis solution with the medium of 6mol

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9

Silveira, Maria Lucia Azevedo, and Luís Reynaldo Ferracciú Alleoni. "Copper adsorption in tropical oxisols." Brazilian Archives of Biology and Technology 46, no. 4 (2003): 529–36. http://dx.doi.org/10.1590/s1516-89132003000400006.

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Cu adsorption, at concentrations between 0 to 800 mg L-1, was evaluated in surface and subsurface samples of three Brazilian soils: a heavy clayey-textured Rhodic Hapludalf (RH), a heavy clayey-textured Anionic ''Rhodic'' Acrudox (RA) and a medium-textured Anionic ''Xanthic'' Acrudox (XA). After adsorption, two consecutive extractions were performed to the samples which received 100 mg L-1 copper. Surface samples adsorbed higher amounts of Cu than the subsurface, and exhibited lower Cu removed after the extractions, reinforcing the influence of the organic matter in the reactions. Cu adsorptio

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10

Wong, K. S., K. H. Wong, S. Ng, W. K. Chung, and P. K. Wong. "Adsorption of copper ion on magnetite-immobilised chitin." Water Science and Technology 56, no. 7 (2007): 135–43. http://dx.doi.org/10.2166/wst.2007.672.

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The adsorption of Cu2 + from aqueous solution by magnetite-immobilised chitin (MC) was studied in batch mode. Two conventional adsorbents, cation exchange resin (CER) and activated carbon (AC) were used for the comparison. The physicochemical parameters including pH, concentration of adsorbent, temperature and initial Cu2 + concentration were optimised. Under the optimised conditions, the removal efficiencies of Cu2 + for MC, CER and AC were 91.67, 93.36 and 89.16%, respectively. In addition, the removal capacities of Cu2 + for MC, CER and AC were 56.71, 74.84 and 6.55 mg/g, respectively. The

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11

Nikolaeva, L. A., and A. A. Adzhigitova. "Purification of Industrial Waste Water from Copper Ions Using Ash Waste." Voprosy sovremennoj nauki i praktiki. Universitet imeni V.I. Vernadskogo, no. 1(79) (2021): 060–68. http://dx.doi.org/10.17277/voprosy.2021.01.pp.060-068.

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The necessity of studying organic waste as a secondary energy resource for a waste-heat boiler with further use of the resulting ash for the adsorption of heavy metal ions is shown. The adsorptive purification of waste water from copper ions by ash of organic waste is considered. The chemical composition and technological characteristics of organic biomass, the characteristics of the boiler and the toxicity of the resulting ash have been determined. The chemical composition of the ash was obtained. The isotherm of adsorption in static conditions and the output curve of adsorption in dynamic co

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12

Scendo, M., and J. Uznanska. "Inhibition Effect of 1-Butyl-4-Methylpyridinium Tetrafluoroborate on the Corrosion of Copper in Phosphate Solutions." International Journal of Corrosion 2011 (2011): 1–12. http://dx.doi.org/10.1155/2011/761418.

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The influence of the concentration of 1-Butyl-4-methylpyridinium tetrafluoroborate (4MBPBF4) as ionic liquid (IL) on the corrosion of copper in 0.5 M solutions of pH 2 and 4 was studied. The research involved electrochemical polarization method, and scanning electron microscopy (SEM) technique. The results obtained showed that the inhibition efficiency of corrosion of copper increases with an increase in the concentration of 4MBPBF4but decreases with increasing temperature. The thermodynamic functions of corrosion analysis and adsorptive behavior of 4MBPBF4were carried out. During the test, th

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13

Anokye, Obed Osei, and Chun Lei Zhang. "Competitive Adsorption of Lead and Copper by Kaolin." Advanced Materials Research 1073-1076 (December 2014): 784–90. http://dx.doi.org/10.4028/www.scientific.net/amr.1073-1076.784.

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Due to the potential of kaolin as an adsorbent for removal of heavy metals from solution, the competitive adsorption of Lead (Pb) and Copper (Cu) by kaolin was investigated to provide further understanding on the binding behaviors and capacities of these two metals onto kaolin. The Langmuir and Freundlich isotherms were applied to further explain the competition between the metals. Three different solutions were used, each at concentrations 10, 20, 30, 45, 60 and 75mg/L: single-metal solution of Pb (Pb-Only), single-metal solution of Cu (Cu-Only), and solution of both metals at the same concen

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14

Paternina, Erika Beatriz Ruiz, Maria Natalia Piol, Andrea Beatriz Saralegui, Néstor Caracciolo, and Susana P. Boeykens. "Remoción de Iones Metálicos de Mezclas Binarias Usando Dolomita." KnE Engineering 3, no. 1 (2018): 679. http://dx.doi.org/10.18502/keg.v3i1.1471.

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In the present work we evaluated the use of dolomite as an alternative for the adsorption of lead and copper ions from their aqueous solutions. The possible interferences between them and the selectivity of the process were studied working with mixtures of these two ions in adsorption processes. From the analysis of the results it can be inferred that the adsorption of lead is not affected by the presence of copper, since no changes in its adsorption capacity are observed as the concentration of the other ion changes. Copper adsorption is not affected by the presence of lead up to a copper lev

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15

Xu, Lei, Hongbiao Cui, Xuebo Zheng, et al. "Adsorption of Cu2+ to biomass ash and its modified product." Water Science and Technology 2017, no. 1 (2018): 115–25. http://dx.doi.org/10.2166/wst.2018.095.

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Abstract Ash produced by biomass power plants has great potential for the removal of heavy metal ions from aqueous solution. The pollution of toxic heavy metals to water is a worldwide environmental problem. Discharges containing copper, in particular, are strictly controlled because the excessive copper can cause serious harm to the environment and human health. This work aims to investigate the adsorption characteristics of copper ions in aqueous solution by biomass ash and the modified products, and to evaluate their potential application in water pollution control. The biomass ash was modi

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16

Vasylechko, V. O., L. O. Lebedynets, G. V. Gryshchouk, Yu B. Kuz'ma, L. O. Vasylechko, and T. M. Bernats'ka. "Adsorption of Copper on Transcarpathian Mordenite." Adsorption Science & Technology 14, no. 5 (1996): 267–77. http://dx.doi.org/10.1177/026361749601400501.

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The adsorption properties of Ukrainian Transcarpathian mordenite in aqueous copper(II) solutions under dynamic conditions have been investigated. Under optimum conditions (pH of Cu2+ solution = 6.5; adsorbent thermallly modified over 2.5 h at 150°C; rate of passage of Cu2+ solution through adsorbent = 3 ml/min) the adsorption capacity of the mordenite towards copper amounted to 1020 μg/g. Copper is effectively desorbed by an aqueous solution of HNO3 (1:2). Under optimum desorption conditions the effective extraction of copper was 99.8%.

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17

Hess, Brianna J., Praveen Kolar, John J. Classen, Detlef Knappe, and Jay J. Cheng. "Evaluation of Waste Eggshells for Adsorption of Copper from Synthetic and Swine Wastewater." Transactions of the ASABE 61, no. 3 (2018): 967–76. http://dx.doi.org/10.13031/trans.12599.

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Abstract. Biomass-derived adsorbents are an attractive alternative to conventional water treatment methods. This study evaluated eggshells produced by the liquid egg and food processing industry for the adsorption of copper from aqueous systems. Research objectives were to (1) determine copper adsorption mechanisms and (2) evaluate copper adsorption by eggshells for the treatment of wastewater. Batch experiments were performed by contacting eggshells with copper solutions to obtain equilibrium, kinetic, and thermodynamic data to determine removal mechanisms and maximum adsorption capacity. Res

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18

Yang, Li Jiao, Feng Jie Zhang, Quan Sen Shao, Yun Na Wu, and Yu Ying Dong. "Effect of 2, 4-D on Adsorption of Copper onto the Black Soil." Advanced Materials Research 1051 (October 2014): 448–51. http://dx.doi.org/10.4028/www.scientific.net/amr.1051.448.

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Batch equilibrium adsorption was conducted to study the adsorption of copper in the black soil and the effect of 2, 4-dichlorophenoxyacetic acid (2, 4-D) on adsorption of copper was probed by soils. The results showed all of the adsorption isotherms of copper in the absence and presence of 2,4-D could be described by Freundlich equation (R2>0.99), the adsorption coefficients Kf increased with increasing concentration of 2,4-D.The In kinetic modeling, the pseudo-first order equation was considered as the most celebrated model. The pseudo-second order equation in copper was depressed in the p

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19

Reyes, Arturo, María Victoria Letelier, and Gustavo Lagos. "Adsorption of humic and fulvic acid on copper surfaces." Water Supply 10, no. 6 (2010): 915–22. http://dx.doi.org/10.2166/ws.2010.632.

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The presence of natural organic matter (NOM) in drinking water can increase the levels of copper released from copper pipes to water and inhibit the formation of protective deposits such as malachite. Since adsorption of NOM on copper pipes surfaces is believed to be one of mechanisms that explains this phenomenom, the objective of this study was to determine kinetics and the adsorption equilibrium of main components of NOM, humic acid (HA) and fulvic acid (FA), onto copper surfaces. The kinetics and equilibrium adsorption of HA and FA on copper foils were examined using batch experiments at 2

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20

Essebaai, Hanane, Ilham Ismi, Ahmed Lebkiri, Said Marzak, and El Housseine Rifi. "Kinetic and Thermodynamic Study of Adsorption of Copper (II) Ion on Moroccan Clay." Mediterranean Journal of Chemistry 9, no. 2 (2019): 102–15. http://dx.doi.org/10.13171/mjc92190909510he.

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Highly efficient low-cost adsorbent was applied for copper (II) ions uptake from aqueous solution. Characteristics of natural adsorbent were established using scanning X-ray diffraction (XRD), X-ray fluorescence, electron microscope (SEM) and Fourier Transform Infra-Red (FTIR). Various physicochemical parameters such as contact time, initial copper(II) ions concentration, adsorbent dosage, pH of copper (II) ions solution and temperature were investigated. The result showed that the adsorption of copper (II) ions by natural clay was favorable at pH=5,5. The adsorption was found to increase with

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21

Hanzlík, P., J. Jehlička, Z. Weishauptová, and O. Šebek. "Adsorption of copper, cadmium and silver from aqueous solutions onto natural carbonaceous materials." Plant, Soil and Environment 50, No. 6 (2011): 257–64. http://dx.doi.org/10.17221/4030-pse.

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Twelve carbonaceous materials were investigated for adsorption of Cd, Cu and Ag from water solutions. Before the adsorption experiments the chemical and structural characterization of all materials were made. The batch adsorption experiment was used. The kinetic of the adsorption process was very fast for the first five hours but very slow for approximately the next 65 hours. Nevertheless the maximum amount of metal removed was achieved during the first stage of about five hours. Biological materials (milled wood, bark, cork) exhibited a very low affinity for adsorption of metals. The best res

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22

Adeyemo, A. "Adsorption of Copper by Biochar." International Research Journal of Pure and Applied Chemistry 4, no. 6 (2014): 727–36. http://dx.doi.org/10.9734/irjpac/2014/11079.

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23

Cotter, C., and J. T. Trevors. "Copper Adsorption by Escherichia coli." Systematic and Applied Microbiology 10, no. 3 (1988): 313–17. http://dx.doi.org/10.1016/s0723-2020(88)80018-3.

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24

González-Dávila, Melchor, J. Magdalena Santana-Casiano, and Luis M. Laglera. "Copper adsorption in diatom cultures." Marine Chemistry 70, no. 1-3 (2000): 161–70. http://dx.doi.org/10.1016/s0304-4203(00)00020-7.

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25

Ciobanu, Gabriela, Ana Maria Mateiuc, Constantin Luca, and Florin Alexandru Luca. "COPPER(II) ADSORPTION ONTO HYDROXYAPATITE." Environmental Engineering and Management Journal 16, no. 10 (2017): 2353–59. http://dx.doi.org/10.30638/eemj.2017.243.

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26

Stepova, K., L. Sysa, A. Kontsur, and O. Myakush. "Adsorption of Copper Ions by Microwave Treated Bentonite." Physics and Chemistry of Solid State 21, no. 3 (2020): 537–44. http://dx.doi.org/10.15330/pcss.21.3.537-544.

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Changes of bentonite surface structure under the influence of direct microwave irradiation during adsorpion of Cu2+ from concentrated solutions were investigated by X-ray and EDS analysis. The microwave treated bentonite (MTB) has been proved to have enhanced adsorption capacity for copper due to improved pore structure and some peculiarities of adsorption mechanism. The non-linear fitting of experimental data to the theoretical isotherms have demonstrated that the adsorption on natural bentonite fitted the Toth model, whilst microwave-treated bentonite fitted the Langmur-Freundlich model. The

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27

Varma V., Geetha, and Anil K. Misra. "Copper contaminated wastewater – An evaluation of bioremedial options." Indoor and Built Environment 27, no. 1 (2016): 84–95. http://dx.doi.org/10.1177/1420326x16669397.

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The potential of papaya leaf powder and paddy straw powder for copper(II) removal was evaluated from aqueous solution via column and batch adsorption studies. Batch adsorption studies were performed to determine the contact time effects, biosorbent dosage, pH and initial concentration of metal ion on adsorption capacity. Results showed approximately 90% to 95% of copper removal using both the adsorbents from the solution. As the amount of biosorbent increases, the biosorption capacity also increases. Findings indicate that pH is an important factor for metal ion biosorption and 7.0 is the opti

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28

Gong, Zhili, Shini Peng, Xiaomei Huang, and Lanzhou Gao. "Investigation the Corrosion Inhibition Effect of Itraconazole on Copper in H2SO4 at Different Temperatures: Combining Experimental and Theoretical Studies." Materials 11, no. 11 (2018): 2107. http://dx.doi.org/10.3390/ma11112107.

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The anti-corrosion inhibition effect of itraconazole on copper (Cu) in 0.5 M H2SO4 is observed with variety of experimental methods, including electrochemical measurement, surface morphology analysis, and theoretical calculations. These experimental results all confirm that itraconazole exhibits excellent anti-corrosion performance in the certain temperatures range (298 K–313 K) for copper in sulfuric acid solution. In addition, corresponding adsorption isothermal models were used to fit the adsorption behavior of itraconazole on the copper surface. The results show that the Langmuir adsorptio

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29

Alhakawati, M. S., C. J. Banks, and D. Smallman. "Evaluation of two types of polyurethane for the immobilisation of Rhizopus oryzae for copper uptake." Water Science and Technology 47, no. 9 (2003): 143–50. http://dx.doi.org/10.2166/wst.2003.0512.

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Previous studies have shown that Rhizopus oryzae strain IM 057412 grown in reticulated polyurethane foam demonstrated the same heavy metal adsorption capacity as the free biomass. Immobilisation in other types of polymers was shown to reduce the biomass uptake capacity because of mass transfer limitations due to the restricted porosity of the immobilisation matrices. For practical purposes the growing of biomass in polyurethane support particles to use as a commercial adsorbent is not viable or financially sound. The current work describes a different approach in which dried non-viable cells o

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Jovic, V. D., and B. M. Jovic. "Copper electrodeposition from a copper acid baths in the presence of PEG and NaCl." Journal of the Serbian Chemical Society 66, no. 11-12 (2001): 935–52. http://dx.doi.org/10.2298/jsc0112935j.

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Copper electrodeposition from copper acid solutions containing PEG and NaCl has been investigated onto Cu(111), Cu(100) and polycrystalline copper electrodes using polarization and EIS measurements. The adsorption of sulphate and chloride anions, and PEG molecules, was investigated onto Cu(111) and Cu(100) by cyclic voltammetry and differential capacitance measurements. Differential capacitance vs. potential curves recorded onto Cu(100) in solutions containing 0.1 M H2SO4, 0.1 M H2SO4 + 10-3 M PEG and 0.1MH2SO4 + 10-3MPEG + 10-3MNaCl confirm that ?specific adsorption? of PEG molecules occurs i

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Veeravelan, K., S. Arivoli, and V. Marimuthu. "ADSORPTION CHARACTERISTICS OF ZIZYPHUS JUJUBA SEED SHELL ACTIVATED NANO POROUS CARBON FOR REMOVING COPPER (II) IONS FROM WASTEWATER." International Journal of Research -GRANTHAALAYAH 4, no. 12 (2016): 226–41. http://dx.doi.org/10.29121/granthaalayah.v4.i12.2016.2412.

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In the present study, adsorption of copper (II) ions from aqueous solution by Activated Zizyphus Jujuba shell Nano Carbon was investigated under batch mode. The influence of solution pH, sorbent dose, copper concentration, contact time and temperature was studied. The copper adsorption was favored with maximum adsorption at pH 6.5. Sorption equilibrium time was observed in 60 min. The equilibrium adsorption data were correlated with Langmuir, Freundlich, Temkin, Dubinin-Radushkevich, Hurkins-Jura, Halsay, Radlich-Peterson, Jovanovic and BET isotherm models. The kinetics of the adsorption proce

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32

Liang, Xuan, Xue Gang Luo, and Xiao Yan Lin. "Adsorption Mechanism of Copper(II) Ions on Expansion-Treated Rice Husk." Materials Science Forum 695 (July 2011): 13–16. http://dx.doi.org/10.4028/www.scientific.net/msf.695.13.

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Expansion-treated rice husk (ERH) had been used as adsorbent for removing copper(II) ions, and showed strong adsorption ability and removal efficiency for copper(II) ions. In this paper, the surface and bulk structures of ERH adsorbent were investigated by X-ray photoelectron spectroscopy (XPS) and scanning electronic microscopy (SEM), ERH was treated by water solution with different pH value, and the adsorption performance of ERH for copper(II) ions was investigated through adsorption static experiments in order to study the adsorption mechanism. The result showed that ERH treated by alkaline

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33

Song, Guanling, Lijing Cao, Xiao Chen, Wenhua Hou, and Qunhui Wang. "Heavy metal adsorption changes of EAF steel slag after phosphorus adsorption." Water Science and Technology 65, no. 9 (2012): 1570–76. http://dx.doi.org/10.2166/wst.2012.048.

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A kind of electric arc furnace (EAF) steel slag was phosphated, and its isothermal and dynamic adsorptions of copper, cadmium, and lead ions were measured to determine if heavy metal adsorption changes after phosphorus adsorption. The surface area increased greatly after the slag was phosphated. Isothermal adsorption experiments showed that the theoretical Qmax of the EAF steel slag on Cu2+, Cd2+, and Pb2+ improved 59, 50, and 89% respectively after it was phosphated. Dynamic adsorption results showed that the greatest adsorption capacities of unit volume of Cu2+, Cd2+, and Pb2+ were 2.2, 1.8,

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Guo, Tiecheng, Sicong Yao, Hengli Chen, Xin Yu, Meicheng Wang, and Yao Chen. "Characteristics and adsorption study of the activated carbon derived from municipal sewage sludge." Water Science and Technology 76, no. 7 (2017): 1697–705. http://dx.doi.org/10.2166/wst.2017.352.

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Sewage sludge-based activated carbon is proved to be an efficient and low-cost adsorbent in treatment of various industrial wastewaters. The produced carbon had a well-developed pore structure and relatively low Brunauer–Emmett–Teller (BET) surface area. Adsorptive capacity of typical pollutants, i.e. copper Cu(II) and methylene blue (MB) on the carbon was studied. Adsorptions were affected by the initial solution pH, contact time and adsorbent dose. Results showed that adsorption of Cu(II) and MB on the produced carbon could reach equilibrium after 240 min. The average removal rate for Cu(II)

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35

Cao, J., and D. P. Kamdem. "Moisture adsorption characteristics of copper-ethanolamine (Cu-EA) treated Southern yellow pine (Pinus spp.)." Holzforschung 58, no. 1 (2004): 32–38. http://dx.doi.org/10.1515/hf.2004.005.

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Abstract Moisture adsorption isotherms were determined for untreated and copper-ethanolamine (Cu-EA) treated wood at different copper retention levels. The Cu-EA treatment reduces the water vapor accessibility in wood because copper has occupied some of the adsorption sites for moisture during the treatment. The percentage of adsorption sites occupied by copper was evaluated by M t/M u, which is the ratio of equilibrium moisture content for treated wood to untreated wood. The results show that, within the copper retention range used in this study, the M t/M u value decreases linearly at lower

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Dias, Ana Cristi Basile, Marcos Antonio Pavan, Mário Miyazawa, and Décio Carlos Zocoler. "Plant residues: short term effect on sulphate, borate, zinc and copper adsorption by an acid oxisol." Brazilian Archives of Biology and Technology 46, no. 2 (2003): 199–202. http://dx.doi.org/10.1590/s1516-89132003000200010.

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Laboratory experiments were carried out to examine the effects of plant residues on Cu, Zn, B and S adsorption by an acidic oxisol. The plant residues were: black oats (Avena strigosa), oil seed radish(Raphanus sativus), velvet beans (Stizolobium cinereum), and pigeon pea (Cajanus cajan) collected at flowering stage. Plant residues increased Cu and Zn adsorptions and decreased B and S adsorptions. The results indicated that for short term effect plant residues decreased the availabilities of Cu and Zn through metal organic complex reactions and increased availabilities of S and B through compe

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Uyguner, C. S., and M. Bekbolet. "TiO2-assisted photocatalytic degradation of humic acids: effect of copper ions." Water Science and Technology 61, no. 10 (2010): 2581–90. http://dx.doi.org/10.2166/wst.2010.174.

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The present study investigated the removal efficiency of aqueous humic acid solutions by TiO2 photocatalytic degradation in the presence of Cu(II) species. The pseudo-first-order kinetics revealed rate constants as 9.87 × 10−3, 7.19 × 10−3, 3.81 × 10−3 min−1 for Color436, UV254 and TOC, respectively. Comparatively, lower rate constants were attained with respect to photocatalytic degradation of humic acid. Considering the source-dependent diverse chemical and spectral characteristics of NOM, a particular interaction would be expected for humic acid with Cu(II) species (0.1 mg L−1). The presenc

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Celebi, Neslihan, Hayrunnisa Nadaroglu, Ekrem Kalkan, and Recep Kotan. "Removal of copper from copper-contaminated river water and aqueous solutions using Methylobacterium extorquens modified Erzurum clayey soil." Archives of Environmental Protection 42, no. 4 (2016): 58–69. http://dx.doi.org/10.1515/aep-2016-0035.

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Abstract The objective of this study was to investigate the possibility of using natural and bacteria-modified Erzurum clayey soil with Methylobacterium extorquens as an alternative to high cost commercial adsorbent materials for the removal of copper from aqueous solution. The copper concentrations in the samples of the polluted river water and CuCl2 solutions treated by the natural and bacteria-modified Erzurum clayey soil (ECS) have been determined by spectrophotometric method. Firstly, the surface of ECS was modified with M. extorquens and surface functionality was increased. Then, the ads

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Banat, Fawzi, Sameer Al-Asheh, and Leena Abu-Aitah. "Competitive Adsorption of Phenol, Copper Ions and Nickel Ions on to Heat-Treated Bentonite." Adsorption Science & Technology 20, no. 2 (2002): 107–17. http://dx.doi.org/10.1260/026361702320360531.

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Industrial effluents often contain a mixture of organic and inorganic pollutants. Since the degree of removal of any solute might be affected by the presence of the other, it is important to study the competitive adsorption of these solutes. Batch experiments were carried out to study the competitive adsorption of binary combinations of phenol, copper and nickel compounds in aqueous mixtures on to heat-treated bentonite. The uptake of phenol was not affected by the presence of copper or nickel ions. However, the uptake of copper and nickel decreased in the presence of phenol. In a system that

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Pan, Qing-qing, and Hui-qing Peng. "Effect of Copper and Iron Ions on the Sulphidizing Flotation of Copper Oxide in Copper Smelting Slag." Advances in Materials Science and Engineering 2018 (2018): 1–9. http://dx.doi.org/10.1155/2018/4656424.

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The treatment of smelting slag has attracted much attention nowadays. This study investigates the influence of Na2S, CuSO4, and FeCl3 on sulphidizing flotation of copper oxide. The results show that a proper Cu2+ concentration can increase the sulphidizing effect of copper oxide, while Fe3+ inhibits the sulphidizing effect. Further analysis shows that Cu2+ ions can reduce the surface potential, increase the S2− adsorption, then generate more polysulfide, and therefore promote the sulphidizing flotation. However, Fe3+ ions would increase the surface potential, reduce the S2− adsorption, generat

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Lv, Junmin, Yulong Ma, Xuan Chang, et al. "Chemical adsorption of oxytetracycline from aqueous solution by modified molecular sieves." Water Science and Technology 75, no. 5 (2016): 1221–32. http://dx.doi.org/10.2166/wst.2016.604.

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The removal of oxytetracycline (OTC) from aqueous solution on modified molecular sieve via adsorption was investigated in the present work. The copper(II) modified molecular sieve had the much higher adsorbed amount than unmodified one. The bigger pore, the more adsorption sites benefitted for the adsorbed amount of OTC. The exchanged amount of copper(II) and the acid-base property of solution were important factors influencing the removal efficiency. The adsorption kinetics, the adsorption isotherm, the adsorption thermodynamics and the proposed adsorption mechanism were studied. The analysis

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Liang, Septimus H., Shiliang Wang, and David B. Pedersen. "Adsorption of HCN onto Copper@Copper-Oxide Core–Shell Nanoparticle Systems." Adsorption Science & Technology 27, no. 4 (2009): 349–61. http://dx.doi.org/10.1260/026361709790252632.

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Copper compounds are widely used as impregnants that enhance the removal of HCN by carbon-based filter media. The reaction mechanism involved is poorly understood. In this study, we have followed the reaction of HCN with pristine copper, copper oxide (CuO and Cu2O) and copper@copperoxide (Cu@Cu2O) core–shell nanoparticles of well-defined size and composition. We have established a cooperative reaction mechanism where both the copper oxide shell and copper core are required for the chemisorption of HCN onto copper nanoparticle impregnants. The suitability of copper@copperoxide nanoparticles as

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Stankovic, Velizar, Dragana Bozic, Milan Gorgievski, and G. Bogdanovic. "Heavy metal ions adsorption from mine waters by sawdust." Chemical Industry and Chemical Engineering Quarterly 15, no. 4 (2009): 237–49. http://dx.doi.org/10.2298/ciceq0904237s.

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In this work the results on the batch and column adsorption of copper and some associated ions by employing linden and poplar sawdust as a low-cost adsorbent are presented. The mine water from a local abandoned copper mine, as well as synthetic solutions of those ions which are the main constituents of the mine water were both used as a model-system in this study. The adsorption ability of the chosen sawdust to adsorb heavy metal ions is considered as a function of the initial pH of the solution and kind of metal ions. At lower pH of solutions the adsorption percentage (AD %) decreases leading

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Tascioglu, Cihat, Paul Cooper, and Tony Ung. "Rate and extent of adsorption of ACQ preservative components in wood." Holzforschung 59, no. 5 (2005): 574–80. http://dx.doi.org/10.1515/hf.2005.094.

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Abstract The adsorption of copper, [as Cu(II)], monoethanolamine (MEA) and didecyldimethyl ammonium chloride (DDAC) components of CuMEA and alkaline copper quaternary (ACQ) solutions impregnated into wood was followed by measuring the changes in solution concentrations in the wood over time. The rate and extent of copper and MEA adsorption were highly dependent on the solution strength and the conditioning temperature. Both copper and MEA were adsorbed by the wood structure with a rapid initial reaction, with higher relative amounts sorbed from lower concentration solutions. This was followed

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Guo, Qiehui, Zhongyang Zang, Jie Ma, Jingyi Li, Tong Zhou, and Runping Han. "Adsorption of copper ions from solution using xanthate wheat straw." Water Science and Technology 82, no. 10 (2020): 2029–38. http://dx.doi.org/10.2166/wst.2020.487.

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Abstract To enhance adsorption capacity of wheat straw (WS) toward copper ion from solution, carbon disulfide was used to modify WS by a facile grafting method through epichlorohydrin and ethylenediamine. So WS containing xanthate groups (XWS) was obtained. The XWS was characterized using elemental analysis, X-ray diffraction, infrared spectroscopy and adsorption property of XWS toward copper ions. The results showed that S was introduced into the surface of WS. The solution pH was in favor of Cu2+ adsorption at pH 5, while NaCl existing in solution was slightly favorable for adsorption. The a

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Li, Linbo, Lirong Zhao, Jian Ma, and Yuhong Tian. "Preparation of graphene oxide/chitosan complex and its adsorption properties for heavy metal ions." Green Processing and Synthesis 9, no. 1 (2020): 294–303. http://dx.doi.org/10.1515/gps-2020-0030.

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AbstractGraphene oxide hydrosol was added dropwise to the surface of chitosan (CS) to successfully obtain graphene oxide/chitosan composite (GC). The composite material was characterized by scanning electron microscopy and X-ray diffraction. The prepared adsorbent was used to simulate the static adsorption of copper, lead, and cadmium ions from 100 mL of 50 mg/L simulated wastewater samples. When the pH of the simulated wastewater is 6, initial dosage is 70 mg, adsorption time is 90 min, and temperature is 20°C; the adsorption capacities for copper, lead, and cadmium are 60.7, 48.7, and 32.3 m

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Duarte, Felipe Cimino, Maria das Graças Cardoso, Zuy Maria Magriotis, Wilder Douglas Santiago, João Guilherme Pereira Mendonça, and Leonardo Milani Avelar Rodrigues. "Removal of copper in cachaças using clays." Ciência e Agrotecnologia 38, no. 4 (2014): 382–89. http://dx.doi.org/10.1590/s1413-70542014000400009.

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Increased production and cachaça consumption has stimulated research regarding its quality. It is known that copper can be harmful to human health when it is in concentrated form in the beverage and is ingested in large amounts. Thus, there is a great concern among researchers and producers about the use of adsorbent substances for the removal of excess copper. The kinetic parameters and the adsorption isotherms for copper on kaolinite were studied to evaluate the physical-chemical quality of the cachaça before and after adsorption. K01, K03 and K04 kaolinites presented a maximum adsorption ca

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Tanggebono, Iren S. A., Vanny M. A. Tiwow, and Minarni Rama Jura. "Kondisi Optimum Adsorpsi Arang Hayati dari Kulit Pisang Raja (Musa X paradisiaca L.) terhadap Logam Timbal (Pb) dan Tembaga (Cu)." Jurnal Akademika Kimia 7, no. 2 (2018): 55. http://dx.doi.org/10.22487/j24775185.2018.v7.i2.10393.

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This study aimed to determine the optimum condition of biocharcoal from banana peel on adsorption of lead (Pb) and copper (Cu) metals based on the variation of weights and biocharcoal contact times. Banana peel used in this research were taken from Sidondo III the village, Sigi, Central Sulawesi. To determine absorbed metals in biocharcoal banana peel was measured by a spectrophotometer spectroDirect. The results showed that the optimum weight of adsorption lead (Pb) ion was 80 mg and copper (Cu) ion was 40 mg with each percentage adsorption of 73.91% and 21.23%, respectively. The optimum time

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Liu, Ya Li, Xiu Rong Zhao, Dan Ma, Yu Fei Li, and Run Ping Han. "Adsorption of Copper (II) from Solution by Wheat Husk in Batch Mode." Advanced Materials Research 393-395 (November 2011): 1093–97. http://dx.doi.org/10.4028/www.scientific.net/amr.393-395.1093.

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Wheat husk, an agriculture byproduct, was used to adsorb copper (II) from aqueous solutions. Variables of the system, including contact time, pH, salt concentration, and equilibrium copper concentration, were adopted to study their effects on copper (II) adsorption. The results showed that coexisted salt was not favor of adsorption and pH value near 5 was favor of adsorption. Adsorbent quantity of copper onto wheat husk increased with the equilibrium concentration increasing. The kinetic process can be predicted by Elovich model while the equilibrium data was fitted better by Freundlich model.

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ISAGAI, Hiroo, and Hayao SAKAMOTO. "Adsorption of Copper(II) on Shirasu." BUNSEKI KAGAKU 54, no. 10 (2005): 965–68. http://dx.doi.org/10.2116/bunsekikagaku.54.965.

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