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Journal articles on the topic 'Adsorption cadmium ions'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Imanova, J. R., A. A. Azizov, A. M. Nabiev, F. G. Khalilova, and R. M. Alosmanov. "ADSORPTION OF CADMIUM IONS ISOTHERM FROM WATER INTO POLYMER NANOCOMPOSITE." Chemical Problems 2018, no. 1 (2018): 73–77. http://dx.doi.org/10.32737/2221-8688-2018-1-73-77.

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2

Shachneva, Evgeniya, and Darya Archibasova. "Adsorption of Cadmium Ions from Aqueous Solutions on Modified Sorbents." Chemistry & Chemical Technology 12, no. 2 (2018): 182–87. http://dx.doi.org/10.23939/chcht12.02.182.

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3

Huang, Sui Liang. "Adsorption of Cadmium Ions onto the Yellow River Sediment." Water Quality Research Journal 38, no. 2 (2003): 413–32. http://dx.doi.org/10.2166/wqrj.2003.026.

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Abstract Adsorption of cadmium ions onto Yellow River sediment was studied in a batch reactor. Equilibrium adsorption of cadmium ions onto Yellow River sediment can be well described by the Langmuir adsorption isotherm. In view of common experimental conditions in the batch reactor, a set of equations for describing variations of both the dissolved heavy metal pollutant concentration and the particulate heavy metal pollutant concentrations (the adsorption content of heavy metal pollutant on unit weight of sediment) with time was formulated with the use of an adsorptive reaction kinetic equatio

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4

Wang, Hui, Yiming Zhou, Xinjiang Hu, et al. "Optimization of Cadmium Adsorption by Magnetic Graphene Oxide Using a Fractional Factorial Design." International Journal of Environmental Research and Public Health 17, no. 18 (2020): 6648. http://dx.doi.org/10.3390/ijerph17186648.

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Graphene materials have attracted increasing interest in water remediation. In this study, magnetic graphene oxide (MGO) was prepared through the modified Hummers method and the adsorption behaviors of cadmium were investigated. Firstly, the sorption kinetics, isotherms, as well as the effects of pH were investigated. Then, fractional factorial design (FFD) was used to optimize the effects of pH, temperature, time, initial concentration of cadmium ion and NaCl on cadmium adsorption. The results indicate that MGO could effectively remove cadmium ions from an aqueous solution and the sorption da

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5

Massoud, Ayman, F. Abou El-Nour, H. Killa, and U. Seddik. "Chromatographic separation of In(III) from Cd(II) in aqueous solutions using commercial resin (Dowex 50W-X8)." Open Chemistry 8, no. 3 (2010): 696–701. http://dx.doi.org/10.2478/s11532-010-0041-z.

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AbstractThis work assesses the potential of an adsorptive material, Dowex 50w-x8, for the separation of indium ions from cadmium ions in aqueous media. The adsorption behavior of Dowex 50 w-x8 for indium and cadmium ions was investigated. The effect of pH, initial concentration of metal ions, the weight of resins, and contact time on the sorption of each of the metal ions were determined. It was found that the adsorption percentage of the indium ions was more than 99% at pH 4.0. The result shows that In (III) was most strongly extracted, while Cd(II) was slightly extracted at this pH value. Th

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6

Li, Xiang, Shun Guo Bai, Bei Dou Xi, Zhi Ye Yuan, and Yue Ying Wang. "Research of Effect of Groundwater Table Fluctuation on Migration Law of Cadmium." Advanced Materials Research 599 (November 2012): 455–61. http://dx.doi.org/10.4028/www.scientific.net/amr.599.455.

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In this paper, we conduct the soil-column experiment on underground soil in a laboratory of Changping, Beijing, to simulate the effect of water table fluctuation on the cadmium migration law after twice pollution. The main job of the experience is to test the adsorption and desorption characteristics of the soil as well as the temporal and spatial distribution of cadmium ions in soil column. The experimental data show that (1) the two kinds of soil used in the test both have a strong adsorption capacity to cadmium ions, and the values could reach to 1026mg/kg and 2804mg/kg. (2) The dominant fa

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Banat, Fawzi, Sameer Al-Asheh, and Leema Al-Makhadmeh. "Kinetics and Equilibrium Study of Cadmium Ion Sorption onto Date Pits — An Agricultural Waste." Adsorption Science & Technology 21, no. 3 (2003): 245–60. http://dx.doi.org/10.1260/026361703322404395.

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Activated carbons derived from date pits obtained as a surplus agricultural solid waste and natural date pits were used for the adsorption of cadmium ions from water. The effect of contact time, pH, temperature, cadmium ion concentration, sorbent dose, salinity, as well as the activation temperature on the removal of cadmium ions by date pits was studied. The maximum adsorption capacity of date pits for cadmium ions was obtained using the linear Langmuir isotherm model and used as a basis for comparative purposes. Three sorption kinetic models were used for explaining the probable mechanisms o

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8

Kakaei, Ahmad, and Mohammad Kazemeini. "Removal of Cd (II) in Water Samples Using Modified Magnetic Iron Oxide Nanoparticle." Iranian Journal of Toxicology 10, no. 1 (2016): 9–14. http://dx.doi.org/10.32598/ijt.10.1.299.1.

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Background: Heavy metals, even at low concentrations, are harmful to human health and environment. Cadmium as a heavy metal is highly toxic and can cause serious threat to living organisms. This research was designed to evaluate the adsorption potential of modified magnetic iron nanoparticles by 2-(5-bromo-2-pyridylazo)-5-diethylaminophenol ligand for the removal of cadmium ions from water solutions. Methods: This study was conducted in Ilam Branch, Islamic Azad University, Iran, in 2014. Modified magnetic iron nanoparticle was used as adsorbent for the removal of cadmium from aqueous solution

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9

Zhang, Dong. "Preparation and Characterization of Nano-Strontium Titanate Based on Glass Fiber Filter and its Application in Adsorption of Heavy Metals." Applied Mechanics and Materials 44-47 (December 2010): 2140–43. http://dx.doi.org/10.4028/www.scientific.net/amm.44-47.2140.

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Nano-strontium titanate based on glass fiber filter (GFST) was successfully prepared by sol-gel method and characterized using XRD and SEM. The adsorptive potential of GFST for heavy metal ions, such as lead, cadmium, zinc and nickel, was investigated. The results showed that the nano-strontium titanate could crystal based on glass fiber, gaining a new block adsorbent like a leaf. The lead, cadmium, zinc and nickel ions were quantitatively retained at pH 6-9; their adsorption capacities of GFST for lead, cadmium, zinc and nickel ions were 153.21 mg•g-1, 8.32 mg•g-1, 21.36 mg•g-1 and 4.80 mg•g-

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10

Zeatoun, Lua'y, Noor Younis, and Rana Rafati. "Evaluation of Activated and Non-Activated Tar Sands for the Removal of Phenol and Cadmium from Aqueous Solutions." Water Quality Research Journal 39, no. 3 (2004): 252–57. http://dx.doi.org/10.2166/wqrj.2004.035.

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Abstract Locally available tar sands were used for the removal of phenol and cadmium ions from their aqueous solutions. Batch sorption experiments showed that tar sands did not remove phenol from aqueous solutions, but they were effective in cadmium adsorption. Cadmium uptake was found to increase with an increase in initial concentration of the metal ions, temperature, pH and sorbent amount. On the other hand, the presence of ions such as sodium, Na+, suppressed the uptake of cadmium ions. Physical activation of the tar sands influenced the adsorption process negatively. The sorption process

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11

Janusz, Wladyslaw, Anita Sędłak, and Marlena Matysek-Nawrocka. "Experimental Study of the Co-Adsorption of Cadmium and Citrate Ions onto a TiO2 (Anatase)/Electrolyte Solution Interface." Adsorption Science & Technology 26, no. 8 (2008): 599–612. http://dx.doi.org/10.1260/026361708788059875.

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A study of the co-adsorption of cadmium and citrate ions onto the mono-dispersed TiO2 (anatase)/NaClO4 aqueous solution interface is presented. The influence of ionic strength and pH on the adsorption of cadmium and citrate ions in this system was investigated. The surface charge density, the ζ-potential and adsorption-edge (or envelope) parameters such as pH50% and ΔpH10–90% were also determined for different concentrations of adsorbed ions. The presence of citrate anions increased the adsorption of Cd(II) ions at low pH values but led to a corresponding decrease at high pH values. The influe

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12

Liu, Xiaofeng, Xin Xu, Xiaoqiang Dong, and Junboum Park. "Adsorption characteristics of cadmium ions from aqueous solution onto pine sawdust biomass and biochar." BioResources 14, no. 2 (2019): 4270–83. http://dx.doi.org/10.15376/biores.14.2.4270-4283.

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The adsorption capacity of cadmium ions by pine sawdust biomass and biochar was evaluated in batch experiments. Pine sawdust biochars were pyrolyzed at 500 °C and 700 °C and obtained in the absence of oxygen. The adsorption capacity of biochar was higher than the raw biomass (3.47 mg/g). Biochars produced at 700 °C showed better adsorption efficiency (6.09 mg/g) than that produced at 500 °C (4.78 mg/g). Also, the adsorption kinetics and adsorption isotherms were studied. The adsorption behavior of cadmium by pine sawdust biomass and biochar fitted Langmuir isotherms and pseudo-second order kin

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13

Danila, Vaidotas, and Saulius Vasarevičius. "Theoretical Modelling of Immobilization of Cadmium and Nickel in Soil Using Iron Nanoparticles." Mokslas - Lietuvos ateitis 9, no. 4 (2017): 381–86. http://dx.doi.org/10.3846/mla.2017.1067.

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Immobilization using zero valent using iron nanoparticles is a soil remediation technology that reduces concentrations of dissolved contaminants in soil solution. Immobilization of heavy metals in soil can be achieved through heavy metals adsorption and surface complexation reactions. These processes result in adsorption of heavy metals from solution phase and thus reducing their mobility in soil. Theoretical modelling of heavy metals, namely, cadmium and nickel, adsorption using zero valent iron nanoparticles was conducted using Visual MINTEQ. Adsorption of cadmium and nickel from soil soluti

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14

Biegańska, Marta, and Ryszard Cierpiszewski. "Utilization of agricultural and industrial wastes for metal removal from aqueous solutions." Polish Journal of Chemical Technology 13, no. 1 (2011): 20–22. http://dx.doi.org/10.2478/v10026-011-0004-y.

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Utilization of agricultural and industrial wastes for metal removal from aqueous solutions In this study a possibility of obtaining sorbents from basketry wastes has been investigated. Therefore, adsorption of cadmium ions on wicker bark of Salix americana has been studied. The obtained experimental results were described by the Freundlich equation and adsorption kinetics by the pseudo-second order equation. The effect of pH on cadmium ions adsorption by S. americana was also investigated. It has been found that for the pH values ranging from 2 to 7 cadmium removal from the solution was held a

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15

Abbasi, Shahriar, Mehdi ShanbehDehbalai, and Hossein Khani. "Solid phase extraction of trace amounts of cadmium(II) ions in water and food samples using iron magnetite nanoparticles modified by sodium dodecyl sulfate and 2-mercaptobenzothiazole." Water Science and Technology 75, no. 6 (2017): 1440–46. http://dx.doi.org/10.2166/wst.2017.010.

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A new, simple and rapid method for solid phase extraction and preconcentration of trace amounts of cadmium ions using 2-mercaptobenzothiazole/sodium dodecyl sulfate immobilized on magnetite nanoparticles (MBT-SDS-MNPs) was proposed. The method is based on the extraction of cadmium ions via complexation with MBT immobilized on SDS-coated MNPs and their determination by flame atomic absorption spectrometry. The effects of different parameters – pH; eluent type, concentration and volume; amounts of salt and adsorbent; contact time and interfering ions – on the adsorption of cadmium ions were stud

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16

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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17

Hui, Yong Wei, and Li Chao An. "Adsorption Kinetics and Isotherms Study of Cadmium Ions from Aqueous Solution on Tailings of Steel Slag." Advanced Materials Research 599 (November 2012): 602–7. http://dx.doi.org/10.4028/www.scientific.net/amr.599.602.

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This article explores the operating conditions of the removal of cadmium ions from wastewater by tailings of steel slag and investigates the effect of stirring rate, initial concentration of cadmium, particle size of tailings and pH value of aqueous on removal efficiency. The results show that: under proper conditions, the removal rate of cadmium ions from water on tailings of steel slag can be up to above 99.9%. The adsorption kinetics follows the pseudo-second-order kinetics equation and the adsorption isotherm conforms to the Langmuir model.

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18

Cui, Yan Hui, and Shou Gang Yan. "The Experimental Study of the Adsorption Behavior of Cd on Manganese Dioxides." Advanced Materials Research 1089 (January 2015): 125–28. http://dx.doi.org/10.4028/www.scientific.net/amr.1089.125.

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This paper studied the adsorption behavior of Cd on manganese dioxide, focusing on the factors of affecting the adsorption. The results showed that the adsorption equilibrium was reached in about six hours. The amount of manganese dioxide adsorption of cadmium ions increased with the increasing of the initial Cd2+ concentration, and then decreased, adsorption isotherms accorded with Langmuir isotherm equation. The most influence factor on the adsorption properties of manganese dioxide was pH value. After the addition of inorganic salts, only ammonium bicarbonate could promote the adsorption of

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19

Pincovschi, Irina, Nicoleta Neacsu, Cristina Modrogan, and Mircea Stefan. "The Adsorption of Cadmium and Zinc Ions from Waste Waters in Agricultural Argilaceous Soils." Revista de Chimie 68, no. 3 (2017): 527–29. http://dx.doi.org/10.37358/rc.17.3.5494.

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The adsorption of cadmium and zinc ions from waste waters in agricultural argilaceaus soils have been studied, using a thermodynamic method in order to put in evidence the influence of adsorption conditions on adsorption degree. The adsorption isotherms, Langmuir and Freundlich, have been used to describe the adsorption equilibrium. The experimental data put in evidence that Cd2+ ions are more adsorbable (about 300 mmol/g) than Zn2+ ones (about 200 mmol/g). The Langmuir isotherms reflect more exactly the adsorption process of both Cd2+and Zn2+ ions, being recommended for thermodynamic paramete

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20

Bi, Qiang, Juan Qin Xue, Ying Juan Guo, Yu Jie Wang, and Yun Feng Xue. "Study on the Kinetics of Adsorption of Cadmium by Chitosan." Advanced Materials Research 160-162 (November 2010): 1804–9. http://dx.doi.org/10.4028/www.scientific.net/amr.160-162.1804.

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The adsorption of cadmium in simulated wastewater by chitosan was investigated. The influence of temperature, contact time and pH on adsorption efficiency of cadmium was examined. Some related mathematical models were used in the fitting of experimental data. The results showed that at room temperature, the optimum pH of adsorption is between 4 and 7. At lower pH values, a strong competition existed between cadmium ions and protons for sorption sites and the sorption efficiency was decreased. After 60 minutes the adsorption equilibrium can be achieved. Chitosan is very effective at removing ca

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21

Chen, Jun Jie, and Bao Fang Liu. "Kinetic Study on the Heavy Metal Ions Removal from Aqueous Solutions Using Multi-Walled Carbon Nanotubes." International Letters of Chemistry, Physics and Astronomy 65 (April 2016): 64–70. http://dx.doi.org/10.18052/www.scipress.com/ilcpa.65.64.

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Kinetic study on the removal of zinc(II), copper(II), lead(II) and cadmium(II) from the aqueous solutions using multi-walled carbon nanotubes (MWNTs) was carried out to examine the temperature effect on the adsorption of zinc(II), copper(II), lead(II) and cadmium(II) as well as to explore the potentiality of using carbon nanotubes as a promising adsorbent for environmental remediation. Multi-walled carbon nanotubes were characterized by BET (Brunauer-Emmett-Teller), FE-SEM (Field emission scanning electron microscopy), and DPASV (differential pulse anodic stripping voltammetry). Adsorption exp

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22

Ndung’u, S. N., E. W. Nthiga, and R. N. Wanjau. "Modified ion exchange jackfruit seeds resin for removal of selected trace heavy metal ions from aqueous solution." African Journal of Pure and Applied Sciences 2, no. 2 (2021): 84–92. http://dx.doi.org/10.33886/ajpas.v2i2.211.

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Water is essential for every life processes. However, its quality is deteriorating every day due to the recent industrial advancements. Anthropogenic processes such as industrialization, mining and agricultural activities have led to alarming discharge of heavy metal ions to the aquatic bodies. This possess a greater threat to human, animal and the entire ecosystem wellbeing. Accumulation of heavy metal ions in drinking water beyond permissible limits is detrimental to human health. Therefore, their removal is paramount. Conventional remediation techniques have been employed but have remained

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23

Naseem, Khalida, Zahoor H. Farooqi, Robina Begum, et al. "Removal of Cadmium (II) from Aqueous Medium Using Vigna radiata Leave Biomass: Equilibrium Isotherms, Kinetics and Thermodynamics." Zeitschrift für Physikalische Chemie 233, no. 5 (2019): 669–90. http://dx.doi.org/10.1515/zpch-2018-1223.

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Abstract In the present study, a novel biosorbent Vigna radiata leaves biomass (L. biomass) was utilized for cadmium (II) extraction from aqueous medium. Cadmium (II) free and cadmium (II) loaded L. biomass was analyzed by Fourier transform infrared (FTIR) spectroscopy. Adsorption of cadmium (II) from aqueous medium was studied under various conditions such as adsorbent dose, agitation time, pH and temperature of the medium to optimize the process variables. Different models including Langmuir, Freundlich, Temkin and Dubinin–Radushkevich (DR) were used to elaborate the insight of adsorption pr

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24

Rubio, Fernanda, Affonso Celso Gonçalves, Ana Paula Meneghel, Cesar Ricardo Teixeira Tarley, Daniel Schwantes, and Gustavo Ferreira Coelho. "Removal of cadmium from water using by-product Crambe abyssinica Hochst seeds as biosorbent material." Water Science and Technology 68, no. 1 (2013): 227–33. http://dx.doi.org/10.2166/wst.2013.233.

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The effectiveness of Crambe abyssinica Hochst seeds by-product as a biosorbent for the removal of cadmium ions from wastewater was analyzed. The biomass of crambe was characterized by scanning electron microscopy, infrared spectroscopy and determining the point of zero charge. The optimum adsorption conditions obtained were 400 mg of biomass in a solution of pH 6.0 and contact time of 60 min to remove 19.342 mg g−1 cadmium ions. The isotherms of adsorption were constructed and, according to the mathematical linearization, the best fitting followed the Freundlich and Dubinin–Radushkevich models

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25

Ramdani, Amina, Abdelkader Kadeche, Mehdi Adjdir, et al. "Lead and cadmium removal by adsorption process using hydroxyapatite porous materials." Water Practice and Technology 15, no. 1 (2020): 130–41. http://dx.doi.org/10.2166/wpt.2020.003.

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Abstract This contribution is a comparison study between synthetic hydroxyapatite (Sy-HAP) and commercial hydroxyapatite (C-HAP) for the removal of Pb2+ and Cd2+ ions present in wastewater from industrial effluents. The obtained results show that the equilibrium time required for complete adsorption of Pb2+ and Cd2+ ions on C-HAP and Sy-HAP is 15 min for both. The obtained removal efficiencies for Sy-HAP are 95.52% and 90.91% for Pb2+ and Cd2+ ions, respectively. Whereas, C-Hap presents lower removal efficiencies of 86.53% and 81.43% for Pb2+ and Cd2+ ions, respectively. Maximum adsorption was

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26

Kumar, Rajeev, Jyoti Chawla, and Inderpreet Kaur. "Removal of cadmium ion from wastewater by carbon-based nanosorbents: a review." Journal of Water and Health 13, no. 1 (2014): 18–33. http://dx.doi.org/10.2166/wh.2014.024.

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A green environment and a healthy life are dream projects of today's science and technology to save the world. Heavy metal ions in water affect both environment and human health. Cadmium has been identified as one of the heavy metals that causes acute or chronic toxic effects if ingested. Increasing use of cadmium in different technological fields has raised concern about its presence and removal from water/wastewater. Researchers have made many systematic efforts to remove heavy metals from water to reduce their impact on human beings and the environment. Adsorption is one of the best methods

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27

Yong, Raymond N., and Tamara W. Sheremata. "Effect of chloride ions on adsorption of cadmium from a landfill leachate." Canadian Geotechnical Journal 28, no. 3 (1991): 378–87. http://dx.doi.org/10.1139/t91-048.

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This study examines possible formation of neutral and negative complex ions between trace quantities of cadmium (Cd) and chloride ions (Cl−). Experiments were first performed for the adsorption of Cd, from 2 to 10 mg/L, onto kaolinite in a soil suspension from a landfill leachate. A companion set of experiments was performed involving Cd, also from 2 to 10 mg/L, onto kaolinite in a soil suspension from a pure solution. By comparing the results from these two sets of experiments, it was apparent that there were constituents in the leachate which interfered with the adsorption of cadmium onto ka

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28

BUEMA, Gabriela, Nicoleta LUPU, Horia CHIRIAC, et al. "FLY ASH MAGNETIC ADSORBENT FOR CADMIUM ION REMOVAL FROM AN AQUEOUS SOLUTION." Spring 185, no. 1 (2021): 42–50. http://dx.doi.org/10.46909/journalalse-2021-004.

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The fly ash generated from a Romanian power plant was used as a starting material in this study. The aim of the study was to obtain a low cost material based on the treatment of fly ash with Fe3O4 for utilization as an adsorbent for cadmium ion removal. The adsorbent that was synthesized was characterized using different techniques. The adsorption process was investigated by the batch technique at room temperature. The quantity of cadmium ion adsorbed was measured spectrophotometrically. The experimental data showed that the material can remove cadmium ions at all three working concentrations.

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Onutai, Sujitra, Takaomi Kobayashi, Parjaree Thavorniti, and Sirithan Jiemsirilers. "The Adsorption of Cadmium Ions on Fly Ash Based Geopolymer Particles." Key Engineering Materials 766 (April 2018): 65–70. http://dx.doi.org/10.4028/www.scientific.net/kem.766.65.

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Geopolymer particles from waste coal fly ash were prepared in order to investigate adsorption process of Cadmium ions. The aim of the study is to focus on factors which affect adsorption process of heavy metals on geopolymer materials. The raw fly ash was mixed with sodium hydroxide solution and sodium silicate solution. After that geopolymer was cured at 80 °C for 24 hr. The sample was ground and washed until pH=7. The obtained geopolymer particles were dried at 60 oC. The raw materials and geopolymer were characterized. The XRD results showed a highly amorphous structure in obtained geopolym

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Zhu, Yanfeng, Huageng Liang, Ruilian Yu, Gongren Hu, and Fu Chen. "Removal of Aquatic Cadmium Ions Using Thiourea Modified Poplar Biochar." Water 12, no. 4 (2020): 1117. http://dx.doi.org/10.3390/w12041117.

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Removal of aquatic cadmium ions using biochar is a low-cost method, but the results are usually not satisfactory. Modified biochar, which can be a low-cost and efficient material, is urgently required for Cd-polluted water and soil remediation. Herein, poplar bark (SB) and poplar sawdust (MB) were used as raw materials to prepare modified biochar, which is rich in N- and S- containing groups, i.e., TSBC-600 and TMBC-600, using a co-pyrolysis method with thiourea. The adsorption characteristics of Cd2+ in simulated wastewater were explored. The results indicated that the modification optimized

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Wadie, Alaa, and Enas Al-Khawaja. "Removal of cadmium Cd(ii) and silver Ag(i) from aqueous solutions by nano activated alumina. part i: batch adsorption experiments." MATEC Web of Conferences 162 (2018): 05021. http://dx.doi.org/10.1051/matecconf/201816205021.

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The extent of removal of heavy metal ions cadmium Cd(II) and silver Ag(I) in single and binary system by adsorption on alumina has been investigated. Adsorption experiments were performed in batch technique from synthetic solutions using high purity nano activated alumina prepared in laboratory as adsorbent for heavy metals remove. Several experimental parameters that affect the extent of adsorption of the metal ions of interest have been investigated such as adsorbent dosage, concentration of the adsorbate, contact time, agitation speed and pH of the system under study. The equilibrium nature

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Zhang, Dong, and Yan Li Zhang. "Preparation of Porous Nano-Strontium Titanate and its Application in Removal of Heavy Metals from Environmental Water." Advanced Materials Research 194-196 (February 2011): 765–68. http://dx.doi.org/10.4028/www.scientific.net/amr.194-196.765.

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Porous nano-strontium titanate (PST) was successfully prepared by the reversed-phase suspension polymerization and sol-gel method using reversed-phase suspension droplets as the template, and characterized by XRD and SEM. The ability of the new adsorption to remove lead, cadmium, zinc, copper and nickel ions from water samples was assessed. The results showed that the sorbents were porous, perovskite strontium titanate, and the average particle diameter of crystalloid was 30 nm. The lead, cadmium, zinc, copper and nickel ions were quantitatively retained at pH 5-8; their adsorption capacities

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33

Sitko, Rafal, Marcin Musielak, Beata Zawisza, Ewa Talik, and Anna Gagor. "Graphene oxide/cellulose membranes in adsorption of divalent metal ions." RSC Advances 6, no. 99 (2016): 96595–605. http://dx.doi.org/10.1039/c6ra21432k.

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34

Telkhozhayeva, Madina, Gulziya Seilkhanova, A. Rakhym, Ainur Imangaliyeva, and Dina Akbayeva. "Sorption of lead and cadmium ions from aqueous solutions using modified zeolite." Chemical Bulletin of Kazakh National University, no. 4 (December 28, 2018): 16–22. http://dx.doi.org/10.15328/cb980.

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The processes of lead and cadmium ions sorption by modified zeolite of Chankanai deposit were studied. Chitosan was used as a surface modifier due to its properties: nontoxicity, biodegradability and biocompatibility. The adsorption process was carried out at room temperature (295 K) and pH 7 under static conditions. The synthesized sorbent has been characterized by scanning electron microscopy (SEM), elemental analysis; the concentrations of Pb(II) and Cd(II) ions before and after adsorption were determined using atomic absorption spectroscopy (AAS). The Si/Al ratio of the zeolite was found t

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Ernest, Ezeh, Okeke Onyeka, Aburu C. M., Aniobi C. C., and Ndubuisi J. O. "Adsorption Efficiency of Activated Carbon Produced from Corn Cob for the Removal of Cadmium Ions from Aqueous Solution." Academic Journal of Chemistry, no. 44 (April 26, 2019): 12–20. http://dx.doi.org/10.32861//ajc.44.12.20.

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Studies were carried out to evaluate the adsorption efficiency of activated carbon produced from corn cob for the removal of Cd II ions from aqueous solution. The studies were carried out with due consideration of standard analytical procedures and instrumentation. Increase in the Cd II ions concentration from 90 to 180mg/l decreased the adsorption capacity of the adsorbent from 89.273 to 65.770%. Increase in the adsorbent’s dosage from 0.5 to 2.0g increased the adsorption of Cd II ions from 81.522 to 91.980%. At pH of 5.0, the adsorption process attained equilibrium with a peak adsorption of

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Visa, Aurelia, Bianca Maranescu, Lavinia Lupa, Luminita Crisan, and Ana Borota. "New Efficient Adsorbent Materials for the Removal of Cd(II) from Aqueous Solutions." Nanomaterials 10, no. 5 (2020): 899. http://dx.doi.org/10.3390/nano10050899.

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The rapid increase of industrial activities leads to serious environmental pollution, especially, in aqueous systems and particularly with heavy metals. Cadmium, one of the most poisonous elements, is rapidly accumulated in the human body, therefore, the efficient removal of cadmium ions from wastewater is an urgent need. Coordination networks (CNs) and its subdivision metal-organic frameworks (MOFs), are structured porous composites which present various special properties. In this work two CNs were used as adsorbent materials for the removal of Cd(II) ions from aqueous solutions. By the reac

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M’hamed, Mohamed Ould, and Lotfi Khezami. "1,2,3,4-Tetrahydropyrimidine Derivative for Selective and Fast Uptake of Cadmium Ions from Aqueous Solution." Environments 6, no. 6 (2019): 68. http://dx.doi.org/10.3390/environments6060068.

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The aim of this work was to evaluate the performance of a 1,2,3,4-tetrahydropyrimidine derivative as a powerful heterocyclic compound for the elimination of Cd(II) ions from aqueous solutions. The tetrahydropyrimidine derivative was prepared during 30 min of milling by planetary ball mill with a ball-to-powder mass ratio of 8:1 and a rotation speed of 750 rpm. Nuclear magnetic resonance (NMR) and infrared (IR) were used to identify the obtained tetrahydropyrimidine derivatives. Furthermore, batches of experiments were carried out to establish the adsorption equilibrium, kinetics, and thermodyn

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Achour, Samia, Fattoum Bouchemal, and Leila Youcef. "Inorganic Pollutants in South Algeria Waters and Treatment Options by Adsorption onto Clay." International Journal of Engineering Research in Africa 13 (December 2014): 81–90. http://dx.doi.org/10.4028/www.scientific.net/jera.13.81.

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The chemical quality of several water samples comprised groundwater from various aquifers and water dam, in Biskra area of South Algeria was investigated. Water samples were collected to monitor water chemistry of major ions and minor ions comprising inorganic pollutants such as fluoride, phosphates, nitrates and trace element as cadmium. The results showed a high salinity associated with an excessive hardness. The concentrations of many inorganic compounds are above the permissible limits for standard drinking water in almost water sources. The pollution is mainly attributed to a geological o

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Huang, Guo Zhong, Deng Kun Li, Xue Min Miao, Jun Feng Wang, and Li Jie Bao. "Study on the Advanced Treatment Technology for Wastewater Containing both Zn²⁺ and Cd²⁺." Applied Mechanics and Materials 260-261 (December 2012): 1098–103. http://dx.doi.org/10.4028/www.scientific.net/amm.260-261.1098.

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The removal of heavy metal ions is very significant for the restoration of ecological environment and recycling utilization of water resources. By using the advanced treatment technology for wastewater such as strengthening coagulant, adsorption by modified zeolite and the combination of both，respectively, the influence of different parameters like adding dosage of coagulant and flow rate of raw water on the removal efficiency of zinc and cadmium ions from wastewater was investigated, and the operating conditions were optimized. The results showed that the removal efficiency of zinc and cadmiu

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Mostafa, M. R. "Adsorption of Mercury, Lead and Cadmium Ions on Modified Activated Carbons." Adsorption Science & Technology 15, no. 8 (1997): 551–57. http://dx.doi.org/10.1177/026361749701500801.

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Steam-activated and zinc chloride-activated carbons were prepared from rice husks. These carbons were modified by treatment with different concentrations of sulphuric acid. The adsorption of Hg2+, Pb2+ and Cd2+ ions from aqueous solution at 298 K on to these carbons has been investigated. The effect of pH on the adsorption capacity has also been studied. The adsorption isotherms obtained were of the Langmuir type, the application of the Langmuir equation allowing the determination of the adsorption capacities. The chemistry of the carbon surface is a prominent factor which determines the remov

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Hashim, M. A., K. H. Chu, S. M. Phang, and G. S. Ong. "Adsorption Equilibria of Cadmium on Algal Biomass." Adsorption Science & Technology 15, no. 6 (1997): 445–53. http://dx.doi.org/10.1177/026361749701500605.

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Adsorption equilibria of cadmium on the non-living algal biomass of Chlorella vulgaris were studied using batch stirred-tank methods. The adsorption process was rapid, achieving equilibrium in a few minutes. Environmental factors such as pH, biomass dosage and buffer concentration had a considerable influence on the equilibrium isotherms. The adsorption capacity of the biomass increased with increasing pH. This behaviour was attributed to decreased protonation of the binding sites and decreased competition for binding between the cadmium ions and protons with increasing pH. The equilibrium dat

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Aly, H. M., and A. A. M. Daifullah. "Potential Use of Bagasse Pith for the Treatment of Wastewater Containing Metals." Adsorption Science & Technology 16, no. 1 (1998): 33–38. http://dx.doi.org/10.1177/026361749801600105.

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Bagasse pith was tested for its ability to remove cadmium and lead ions from aqueous solutions under two modes of operation, i.e. in batch systems and continuous flow systems. Time dependency experiments showed a very rapid adsorption of these cations by bagasse pith. Thus, 62% of cadmium ions and 84% of lead ions were taken up by the bagasse pith at pH 6 and ca. 99% of each cation was recovered by treatment of the pith with 0.1 M HCl. The breakthrough capacity, Q0.5, the number of theoretical plates and the theoretical plate height were calculated. The capacity of bagasse pith was found to be

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Esgair, Karim Khalifa. "Comparison between Performance of Okra Waste and Wheat Bran for Removing some Heavy Metals from Wastewater." Al-Nahrain Journal for Engineering Sciences 21, no. 1 (2018): 36. http://dx.doi.org/10.29194/njes21010036.

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In the present work, the agricultural wastes which are wheat bran and raw okra waste used as adsorbent material for adsorption of cadmium and copper ions from wastewater .The effect of adsorption variable which include initial pH of solution , agitation speed, agitation time, initial concentration of cadmium and copper ions, and amount of adsorbent material were investigated in a batch process in order to obtain the maximum ions removal from wastewater .The results obtained from experimental investigation show that the percentage removal of metal ions increases with increasing pH and agitation

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Chwastowski, Jarosław, Dariusz Bradło, and Witold Żukowski. "Adsorption of Cadmium, Manganese and Lead Ions from Aqueous Solutions Using Spent Coffee Grounds and Biochar Produced by Its Pyrolysis in the Fluidized Bed Reactor." Materials 13, no. 12 (2020): 2782. http://dx.doi.org/10.3390/ma13122782.

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The adsorption process of cadmium ions (Cd), manganese ions (Mn) and lead ions (Pb) onto the spent coffee grounds (SCG) and activated spent coffee grounds (biochar, A-SCG) was investigated. The SCG activation was carried out in the pyrolysis process in a fluidized bed reactor. scanning electron microscope (SEM) with energy dispersive X-ray spectroscopy (EDX), Fourier-transform infrared spectroscopy (FTIR), Brunauer–Emmett–Teller (BET) measurements and CHN analysis were used in order to define the differences between biomaterials. In the study the different mass of materials (0.2–0.5 g) and con

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Prélot, B., W. Janusz, F. Thomas, et al. "Adsorption of cadmium ions at the electrolyte/silica interface." Applied Surface Science 196, no. 1-4 (2002): 322–30. http://dx.doi.org/10.1016/s0169-4332(02)00070-3.

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Charmas, R., W. Rudziński, W. Piasecki, et al. "Adsorption of cadmium ions at the electrolyte/silica interface." Applied Surface Science 196, no. 1-4 (2002): 331–42. http://dx.doi.org/10.1016/s0169-4332(02)00071-5.

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Ismail, A., D. B. Adie, I. A. Oke, et al. "Adsorption kinetics of cadmium ions onto powdered corn cobs." Canadian Journal of Chemical Engineering 87, no. 6 (2009): 896–909. http://dx.doi.org/10.1002/cjce.20238.

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Haq, Sirajul, Wajid Rehman, and Muhammad Waseem. "Adsorption Efficiency of Anatase TiO2 Nanoparticles Against Cadmium Ions." Journal of Inorganic and Organometallic Polymers and Materials 29, no. 3 (2018): 651–58. http://dx.doi.org/10.1007/s10904-018-1038-x.

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Song, Xiu Ling, and Hui Qian. "Study on the Experiment of Adsorption Cadmium (II) with Insoluble Starch Xanthate." Advanced Materials Research 413 (December 2011): 34–37. http://dx.doi.org/10.4028/www.scientific.net/amr.413.34.

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Insoluble starch xanthate (ISX) is made with the potato starch and can be used for the treatment of cadmium-containing waste water. The performance of treatment and the influence factors with ISX made in this experiment are studied in this paper. It is shown that the removal rate of cadmium ion in wastewater can reach over 96%, when pH value of reaction liquid is 8.0, the adsorption time is 0.5h, and the concentration of cadmium ions in waste water is 30 mg·L-1.The adsorption mechanism was also discussed. It is shown that ISX promises to be a new treatment adsorbent to wastewater containing th

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Saeed, Anwar Ameen Hezam, Noorfidza Yub Harun, Suriati Sufian, et al. "Modeling and Optimization of Biochar Based Adsorbent Derived from Kenaf Using Response Surface Methodology on Adsorption of Cd2+." Water 13, no. 7 (2021): 999. http://dx.doi.org/10.3390/w13070999.

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Cadmium is one of the most hazardous metals in the environment, even when present at very low concentrations. This study reports the systematic development of Kenaf fiber biochar as an adsorbent for the removal of cadmium (Cd) (II) ions from water. The adsorbent development was aided by an optimization tool. Activated biochar was prepared using the physicochemical activation method, consisting of pre-impregnation with NaOH and nitrogen (N2) pyrolysis. The influence of the preparation parameters—namely, chemical impregnation (NaOH: KF), pyrolysis temperature, and pyrolysis time on biochar yield

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