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Open AccessJournal ArticleDOI

Adsorption Thermodynamics and Kinetics of Mancozeb onto Poly-o-toluidine Th(IV) Phosphate — a Nano-composite Cation-exchanger — and its Application as a Mancozeb-sensitive Membrane Electrode

Asif Khan, +1 more
- 01 Jul 2009 - 
- Vol. 27, Iss: 6, pp 567-578
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TLDR
In this paper, a newly synthesized poly-o-toluidine Th(IV) phosphate nanocomposite cation-exchanger was employed as an adsorbent to study the adsorption thermodynamics and kinetics of Mancozeb from aqueous media.
Abstract
A newly-synthesized poly-o-toluidine Th(IV) phosphate nanocomposite cation-exchanger was employed as an adsorbent to study the adsorption thermodynamics and kinetics of Mancozeb from aqueous media. Some parameters such as the Freundlich constants, the thermodynamic equilibrium constant (K0), the standard free energy change (ΔG0), the standard enthalpy change (ΔH0) and the standard entropy change (ΔS0) were determined. Thermodynamic analysis revealed that the adsorption of Mancozeb onto poly-o-toluidine Th(IV) phosphate was exothermic, spontaneous and decreased as the temperature was increased from 25 °C to 45 °C. A pesticide-sensitive membrane electrode was fabricated using poly-o-toluidine Th(IV) phosphate as an electro-active composite material. Its sensitivity towards Mancozeb was monitored.

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Cu-bentonite as a low-cost adsorbent for removal of ethylenethiourea from aqueous solutions

TL;DR: In this paper, the performance of Cu2+-bentonite clay as an alternative adsorbent for ethylenethiourea removal from aqueous solution was evaluated.
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Separation of 5‐aminovalerate from its bioconversion liquid by macroporous adsorption resin: mechanism and dynamic separation

TL;DR: In this paper, an effective and benign method for separation of 5-aminovalerate (5-AVA) from its bioconversion liquid was proposed based on chromatography technology using macroporous adsorption resin AK•1.
References
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Sorption of dye from aqueous solution by peat

TL;DR: In this paper, the sorption of two dyes, namely Basic Blue 69 and Acid Blue 25 onto peat has been studied in terms of pseudo-second order and first order mechanisms for chemical sorption as well as an intraparticle diffusion mechanism process.
Journal ArticleDOI

Adsorption thermodynamics of carbofuran on Sn (IV) arsenosilicate in H+, Na+ and Ca2+ forms

TL;DR: In this paper, the adsorption thermodynamics of carbofuran were studied on Sn (IV) arsenosilicate cation exchanger in the H+, Na+ and Ca2+ forms at 25 and 50°C.
Journal ArticleDOI

Synthesis, characterization and analytical applications of a new and novel ‘organic–inorganic’ composite material as a cation exchanger and Cd(II) ion-selective membrane electrode: polyaniline Sn(IV) tungstoarsenate

TL;DR: In this paper, a new type of composite cation exchanger called polyaniline Sn(IV) tungstoarsenate was developed by using a new heterogeneous precipitate based selective ion-sensitive membrane electrode for the determination of Cd(II) ions.
Journal ArticleDOI

Determination of Dithiocarbamate Fungicide Residues in Food by a Spectrophotometric Method Using a Vertical Disulfide Reaction System

TL;DR: Analysis of apple, tomato, and papaya samples with field-incurred dithiocarbamate residues showed comparable results using both the traditional and the new reaction systems, which are less fragile than the traditional design, easier to assemble, and allows for a higher sample throughput.
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