The thermodynamics of sequestration of toxic copper(ii) metal ion pollutants from aqueous media by l-cysteine methyl ester modified glassy carbon spheres

2006 ◽  
Vol 16 (10) ◽  
pp. 970 ◽  
Author(s):  
Biljana Šljukić ◽  
Gregory G. Wildgoose ◽  
Alison Crossley ◽  
John H. Jones ◽  
Li Jiang ◽  
...  
Keyword(s):  
Methyl Ester ◽  
Glassy Carbon ◽  
Metal Ion ◽  
Aqueous Media ◽  
Carbon Spheres

Cysteine methyl ester modified glassy carbon spheres for removal of toxic heavy metals from aqueous media

2005 ◽  
pp. 3694 ◽  
Author(s):  
Gregory G. Wildgoose ◽  
Henry C. Leventis ◽  
Andrew O. Simm ◽  
John H. Jones ◽  
Richard G. Compton
Keyword(s):  
Heavy Metals ◽  
Methyl Ester ◽  
Glassy Carbon ◽  
Aqueous Media ◽  
Carbon Spheres ◽  
Toxic Heavy Metals

2-BENZO[C]CINNOLINE AND 2-BENZO[C]CINNOLINE 6-OXIDE MODIFIED GLASSY CARBON ELECTRODES: ELECTROCATALYTIC REDUCTION OF DIOXYGEN IN AQUEOUS MEDIA

2011 ◽  
Vol 39 (2) ◽  
pp. 149-160 ◽  
Author(s):  
Aybüke A. İsbir-Turan ◽  
Zafer Üstündağ ◽  
Emine Kılıç ◽  
Remziye Güzel ◽  
Öznur Uçkan ◽  
...  
Keyword(s):  
Glassy Carbon ◽  
Aqueous Media ◽  
Carbon Electrodes ◽  
Electrocatalytic Reduction ◽  
Glassy Carbon Electrodes

Application of radiation grafted waste polypropylene fabric for the effective removal of Cu (II) and Cr (III) ions

2022 ◽  
Vol 0 (0) ◽  
Author(s):  
Md. Nabul Sardar ◽  
Nazia Rahman ◽  
Shahnaz Sultana ◽  
Nirmal Chandra Dafader
Keyword(s):  
Adsorption Capacity ◽  
Metal Ion ◽  
Aqueous Media ◽  
Thermo Gravimetric Analysis ◽  
Ion Concentration ◽  
Gravimetric Analysis ◽  
Order Kinetic ◽  
Polypropylene Fabric ◽  
Alternative Material ◽  
Waste Polypropylene

Abstract This study focuses on the adsorption of hazardous Cr (III) and Cu (II) ions from aqueous solution by applying modified waste polypropylene (PP) fabric as an adsorbent. Pre-irradiation technique was performed for grafting of sodium styrene sulfonate (SSS) and acrylic acid (AAc) onto the PP fabric. The monomer containing 8% SSS and 16% AAc in water was used. Graft yield at 30 kGy radiation dose was 390% when 4% NaCl was added as additive. The prepared adsorbent was characterized by scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), thermo-gravimetric analysis (TGA) and dynamic mechanical analyzer (DMA). The influences of different parameters including pH, contact time, temperature and initial metal ion concentration were also investigated. The equilibrium adsorption data were better fitted to the Langmuir isotherm model with maximum monolayer adsorption capacity 384.62 mg/g for Cr (III) and 188.68 mg/g for Cu (II) ions. The kinetic data were better explained by pseudo first-order kinetic model having good matching between the experimental and theoretical adsorption capacity. The adsorption process was spontaneous, endothermic and thermodynamically feasible. Furthermore, investigation of desorption of metal ions and reuse of the adsorbent suggesting that the adsorbent is an efficient and alternative material in the removal of Cr (III) and Cu (II) from aqueous media.

Development of calix[4]arenes modified at their narrow- and wider-rims as potential metal ions sensor layers for microcantilever sensors: further studies

2021 ◽  
Author(s):  
Paris E. Georghiou ◽  
Shofiur Rahman ◽  
Yousif Assiri ◽  
Gopi Kishore Valluru ◽  
Melita Menelaou ◽  
...  
Keyword(s):  
Metal Ions ◽  
Metal Ion ◽  
Computational Study ◽  
Aqueous Media ◽  
Experimental Studies ◽  
Ionic Species ◽  
Alkoxy Group ◽  
Self Assembled Monolayers ◽  
Microcantilever Sensors ◽  
Assembled Monolayers

The development of a microcantilever (MCL) sensing device capable of simultaneously detecting several metal ionic species in aqueous media with low limits of detection requires a variety of sensing layers which are ion-specific. Calix[4]arenes are robust molecules which can be easily modified and have been extensively studied for their ion binding properties. They are also capable of forming self-assembled monolayers (SAMs) onto the gold layers of MCLs and are capable of detecting various metal ions with different anionic counterions in aqueous solutions. In this paper we report on the effect of the alkoxy group in the narrow rim [O-(alkoxycarbonyl)methoxy] substituents of bimodal calix[4]arenes which have been used as metal ion MCL sensing layers, using classical solution state experimental studies. A DFT computational study to compare the experimental results with several metal ions is also reported herein.

Kinetic and spectroscopic studies on the chiral self-aggregation of amphiphilic zinc and copper (l)-prolinate-tetraarylporphyrin derivatives in different aqueous media

2019 ◽  
Vol 17 (5) ◽  
pp. 1113-1120 ◽  
Author(s):  
Fabrizio Caroleo ◽  
Manuela Stefanelli ◽  
Gabriele Magna ◽  
Mariano Venanzi ◽  
Roberto Paolesse ◽  
...  
Keyword(s):  
Metal Ion ◽  
Aqueous Media ◽  
Spectroscopic Studies ◽  
Porphyrin Derivatives ◽  
The Media ◽  
Self Aggregation

The chiral self-aggregation of (l)-proline porphyrin derivatives depends on both the nature of the media and the coordinated metal ion.

Photodegradation of 4-chloropehol in aqueous media using LaBO3 (B = Fe, Mn, Co) perovskites: Study of the influence of the transition metal ion in the photocatalytic activity

2020 ◽  
Vol 390 ◽  
pp. 112330
Author(s):  
Gabriela Jácome-Acatitla ◽  
Mayra Álvarez-Lemus ◽  
Rosendo López-González ◽  
Cinthia García-Mendoza ◽  
Andrés Sánchez-López ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Transition Metal ◽  
Metal Ion ◽  
Aqueous Media ◽  
Transition Metal Ion
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