Assessment of Cyanex 301 impregnated resin for its potential use to remove cobalt from aqueous solutions

2020 ◽  
Vol 185 ◽  
pp. 109402 ◽  
Author(s):  
M.S. Gasser ◽  
E. El Sherif ◽  
H.S. Mekhamer ◽  
R.O. Abdel Rahman
Keyword(s):  
Aqueous Solutions ◽  
Impregnated Resin ◽  
Cyanex 301 ◽  
Potential Use

Effects of pyrolysis temperature on the physicochemical properties of biochar derived from vermicompost and its potential use as an environmental amendment

RSC Advances ◽  
2015 ◽  
Vol 5 (50) ◽  
pp. 40117-40125 ◽  
Author(s):  
Gang Yang ◽  
Zhanghong Wang ◽  
Qiming Xian ◽  
Fei Shen ◽  
Cheng Sun ◽  
...  
Keyword(s):  
Physicochemical Properties ◽  
Aqueous Solutions ◽  
Pyrolysis Temperature ◽  
Potential Use

Biochar derived from vermicompost can be employed as an excellent adsorbent for removing contaminants from aqueous solutions.

Kinetic, equilibrium and thermodynamic studies on sorption of uranium and thorium from aqueous solutions by a selective impregnated resin containing carminic acid

2015 ◽  
Vol 286 ◽  
pp. 152-163 ◽  
Author(s):  
Abolfazl Rahmani-Sani ◽  
Ahmad Hosseini-Bandegharaei ◽  
Seyyed-Hossein Hosseini ◽  
Keivan Kharghani ◽  
Hossein Zarei ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Carminic Acid ◽  
Thermodynamic Studies ◽  
Impregnated Resin ◽  
Kinetic Equilibrium

Zinc oxide impregnated resin for preconcentration and spectrophotometric determination of uranyl ions in aqueous solutions

2018 ◽  
Vol 106 (7) ◽  
pp. 569-579
Author(s):  
O. A. Elhefnawy ◽  
A. A. Elabd
Keyword(s):  
Aqueous Solutions ◽  
Spectrophotometric Determination ◽  
Adsorption Process ◽  
Fourier Transforms ◽  
Sol Gel ◽  
Uranyl Ions ◽  
X Ray ◽  
Relative Standard ◽  
Impregnated Resin

Abstract The objective of this work is to find a new, efficient and alternate low-cost adsorbent for preconcentration and spectrophotometric determination of uranyl ions U(VI) from aqueous solution. For this reason the new impregnated resin (ZnO/7HP) has been prepared by sol-gel technique. Characterization of ZnO/7HP was conducted using scanning electron microscopy/energy-dispersive X-ray spectrometer and X-ray diffraction, and Fourier transforms infrared spectroscopy. Several important parameters influencing the U(VI) adsorption such as pH, adsorbent amount, initial U(VI) concentration, contact time and temperature were investigated systematically by batch experiments. The obtained results showed that the equilibrium adsorption data were well fitted to the Langmuir model with a maximum adsorption amount of 24.96 mg/g. While the adsorption kinetics data were described well by the pseudo-second order model. This result indicates that the adsorption process is chemisorption. Thermodynamic results indicate that the U(VI) adsorption process is endothermic nature and favors at high temperature. Hydrochloric acid was used for preconcentration of U(VI) and detected spectrophotometry after the reaction with Arsenazo III. According to the definition of International Union of Pure and Applied Chemistry, the detection limit of this method was 0.12 μg/L. The relative standard deviation under optimum conditions is less than 3.0 % (n=5). The new impregnated resin ZnO/7HP is a promising adsorbent for preconcentration and spectrophotometric determination of U(VI) in aqueous solutions.

scholarly journals Molecular dynamics simulation of the Pb(II) coordination in biological media via cationic dummy atom models

2021 ◽  
Vol 140 (2) ◽  
Author(s):  
Iogann Tolbatov ◽  
Alessandro Marrone
Keyword(s):  
Molecular Dynamics ◽  
Molecular Dynamics Simulation ◽  
Aqueous Solutions ◽  
Pure Water ◽  
Dynamics Simulation ◽  
Ligand Interaction ◽  
Amber Force Field ◽  
Dummy Atom ◽  
Dynamics Simulations ◽  
Potential Use

AbstractThe coordination of Pb(II) in aqueous solutions containing thiols is a pivotal topic to the understanding of the pollutant potential of this cation. Based on its hard/soft borderline nature, Pb(II) forms stable hydrated ions as well as stable complexes with the thiol groups of proteins. In this paper, the modeling of Pb(II) coordination via classical molecular dynamics simulations was investigated to assess the possible use of non-bonded potentials for the description of the metal–ligand interaction. In particular, this study aimed at testing the capability of cationic dummy atom schemes—in which part of the mass and charge of the Pb(II) is fractioned in three or four sites anchored to the metal center—in reproducing the correct coordination geometry and, also, in describing the hard/soft borderline character of this cation. Preliminary DFT calculations were used to design two topological schemes, PB3 and PB4, that were subsequently implemented in the Amber force field and employed in molecular dynamics simulation of either pure water or thiol/thiolate-containing aqueous solutions. The PB3 scheme was then tested to model the binding of Pb(II) to the lead-sensing protein pbrR. The potential use of CDA topological schemes in the modeling of Pb(II) coordination was here critically discussed.

scholarly journals DNA-Modified Polysulphone Microspheres for Endocrine Disruptors and Heavy Metal Ions Removal

2005 ◽  
Vol 23 (5) ◽  
pp. 387-398 ◽  
Author(s):  
Changsheng Zhao ◽  
Ling Shi ◽  
Xingyi Xie ◽  
Shudong Sun ◽  
Xiangdong Liu ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Aqueous Solutions ◽  
Metal Ions ◽  
Acridine Orange ◽  
Endocrine Disruptors ◽  
Hydrophobic Interaction ◽  
Heavy Metal Ions ◽  
Heavy Metal Ions Removal ◽  
Potential Use ◽  
Metal Ions Removal

Porous polysulphone (PSf) microspheres were modified by blending DNA into them and immobilizing DNA onto their surfaces. The DNA-modified microspheres, which were stable in water, were then used to remove endocrine disruptors and heavy metal ions from their aqueous solutions. Such microspheres could effectively accumulate pollutant compounds and endocrine disruptors, such as ethidium bromide, Acridine Orange, biphenyl, dibenzofuran and dibenzo- p-dioxin from their aqueous solutions. PSf microspheres without DNA also accumulated and removed endocrine disruptors due to their porosity and the hydrophobic interaction between the endocrine disruptors and PSf. Endocrine disruptors with and without a planar structure were effectively accumulated and removed by the DNA-modified PSf microspheres. In addition, PSf microspheres were found to be capable of selectively removing heavy metal ions such as Zn2+, Cu2+, Mg2+, Cd2+ and Ag+ from their aqueous solutions. These results show that DNA can be used to modify PSf microspheres, with the DNA-modified microspheres having a potential use in environmental applications.

scholarly journals Drug induced micelle-to-vesicle transition in aqueous solutions of cationic surfactants

RSC Advances ◽  
2017 ◽  
Vol 7 (7) ◽  
pp. 3861-3869 ◽  
Author(s):  
Zuber S. Vaid ◽  
Arvind Kumar ◽  
Omar A. El Seoud ◽  
Naved I. Malek
Keyword(s):  
Drug Delivery ◽  
Ionic Liquid ◽  
Aqueous Solutions ◽  
Cationic Surfactants ◽  
Cetyltrimethylammonium Bromide ◽  
Diclofenac Sodium ◽  
Drug Induced ◽  
P Solubilization ◽  
Micellar Aggregates ◽  
Potential Use

Solubilization of the drug diclofenac sodium (DS) in micellar aggregates of ionic liquid-based surfactants and cetyltrimethylammonium bromide at 25 °C induces changes to worm-like micelles and vesicles, with potential use in drug delivery.

scholarly journals Bismuth Basic Nitrate as a Novel Adsorbent for Azo Dye Removal

2012 ◽  
Vol 9 (4) ◽  
pp. 1885-1896 ◽  
Author(s):  
E. A. Abdullah ◽  
A. H. Abdullah ◽  
Z. Zainal ◽  
M. Z. Hussein ◽  
T. K. Ban
Keyword(s):  
Aqueous Solutions ◽  
Organic Contaminants ◽  
Structural Characteristics ◽  
Analytical Techniques ◽  
Point Of Zero Charge ◽  
Precipitation Method ◽  
Sunset Yellow ◽  
Ag Particles ◽  
Efficient Route ◽  
Potential Use

Bismuth basic nitrate (BBN) and its TiO2-Ag modified sorbent, PTBA were successfully synthesized via a precipitation method. The structural characteristics of prepared sorbents were determined through different analytical techniques. The potential use of prepared sorbents for organic compounds' removal was evaluated using Methyl Orange and Sunset Yellow dyes as model pollutants in aqueous solutions. The experimental results showed that the presence of TiO2and Ag particles during the crystal growth of bismuth basic nitrate has an effect on the crystal structure, point of zero charge (pHpzc), pore volume and diameter. The lower binding energy of Ti 2p core level peak indicates the octahedral coordination of TiO2particles on the PTBA surface. The alteration of hydrophilic-hydrophobic characteristics of sorbent's surface improves the adsorptive performance of the modified sorbent and provides an efficient route for organic contaminants' removal from aqueous solutions.

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