ORCID Profile
0000-0003-0913-3857
Current Organisation
Murdoch University
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Publisher: Elsevier BV
Date: 11-2004
Publisher: Springer Science and Business Media LLC
Date: 12-10-2012
Publisher: Elsevier BV
Date: 06-2012
DOI: 10.1016/J.ACA.2012.03.060
Abstract: Determination of inorganic phosphate is of very high importance in environmental and health care applications. Hence knowledge of suitable analytical techniques available for phosphate sensing for different applications becomes essential. Electrochemical methods for determining inorganic phosphate have several advantages over other common techniques, including detection selectivity, stability and relative environmental insensitivity of electroactive labels. The different electrochemical sensing strategies adopted for the determination of phosphate using selective ionophores are discussed in this review. The various sensing strategies are classified based on the electrochemical detection techniques used viz., potentiometry, voltammetry, erometry, unconventional electrochemical methods etc., The enzymatic sensing of phosphate coupled with electrochemical detection is also included. Various electroanalytical methods available in the literature are assessed for their merits in terms of selectivity, simplicity, miniaturisation, adaptability and suitability for field measurements.
Publisher: Elsevier BV
Date: 08-2007
Publisher: Springer Science and Business Media LLC
Date: 2001
Publisher: Trans Tech Publications Ltd.
Date: 15-09-2006
Publisher: Springer Science and Business Media LLC
Date: 24-01-2006
Publisher: Elsevier BV
Date: 08-2006
Publisher: Scientific Research Publishing, Inc.
Date: 2011
Publisher: CSIRO Publishing
Date: 2004
DOI: 10.1071/CH03074
Abstract: Random copolymers containing both ferrocene groups and thioether groups were synthesized by free-radical copolymerization of vinylferrocene and 2-(methylthio)ethyl methacrylate, and the random nature of the copolymerization was confirmed by spectroscopic studies. Copolymers with ferrocene-to-thioether ratios of 8 : 1 and 1.2 : 1 were used to modify the surfaces of gold electrodes, and the behaviours of the resulting surface-modified electrodes were investigated by cyclic voltammetry. The SMEs based on the copolymers showed superior stability compared to SMEs based on poly(vinylferrocene), with the most stable SMEs being formed from the copolymer with the higher proportion of thioether groups.
Publisher: Elsevier BV
Date: 2006
Publisher: CSIRO Publishing
Date: 2001
DOI: 10.1071/CH01069
Publisher: Elsevier BV
Date: 08-2008
Publisher: IGI Global
Date: 2017
Publisher: Elsevier BV
Date: 2011
DOI: 10.1016/J.JHAZMAT.2010.08.087
Abstract: The absorption performance of a nano-structured hydroxyapatite produced from a combined ultrasonic and microwave technique was examined for the removal of fluoride from contaminated water. The effect of physical and chemical parameters such as initial pH, contact time, initial fluoride concentration and temperature were investigated. The results indicated that the equilibrium adsorption data followed both the Langmuir and Freundlich isotherms, with a maximum monolayer adsorption capacity of 5.5mg/g at 298K. In addition, the kinetic studies have shown that the fluoride adsorption data followed a pseudo-second order model and that the intra-particle diffusion process played a significant role in determining the rate. The thermodynamic analysis also established that the adsorption process was endothermic and spontaneous. The initial and final fluoride loaded nano-hydroxyapatite s les were characterized using FESEM, TEM, XRD, FTIR and XPS methods. The analysis revealed that structural changes to the adsorbent had taken place.
Publisher: Scientific Research Publishing, Inc.
Date: 2014
Publisher: Elsevier BV
Date: 12-2011
Publisher: Elsevier BV
Date: 12-2011
DOI: 10.1016/J.JENVMAN.2011.07.018
Abstract: Arsenic is a commonly occurring toxic metal in natural systems and is the root cause of many diseases and disorders. Occurrence of arsenic contaminated water is reported from several countries all over the world. A great deal of research over recent decades has been motivated by the requirement to lower the concentration of arsenic in drinking water and the need to develop low cost techniques which can be widely applied for arsenic removal from contaminated water. This review briefly presents iron and aluminium based adsorbents for arsenic removal. Studies carried out on oxidation of arsenic(III) to arsenic(V) employing various oxidising agents to facilitate arsenic removal are briefly mentioned. Effects of competing ions, As:Fe ratios, arsenic(V) vs. arsenic(III) removal using ferrihydrite as the adsorbent have been discussed. Recent efforts made for investigating arsenic adsorption on iron hydroxides/oxyhydroxides/oxides such as granular ferric hydroxide, goethite, akaganeite, magnetite and haematite have been reviewed. The adsorption behaviours of activated alumina, gibbsite, bauxite, activated bauxite, layered double hydroxides are discussed. Point-of-use adsorptive remediation methods indicate that Sono Arsenic filter and Kanchan™ Arsenic filter are in operation at various locations of Bangladesh and Nepal. The relative merits and demerits of such filters have been discussed. Evaluation of kits used for at-site arsenic estimation by various researchers also forms a part of this review.
Publisher: Elsevier BV
Date: 02-02-2005
Publisher: Elsevier BV
Date: 05-2004
Publisher: Elsevier BV
Date: 2010
No related grants have been discovered for Touma Issa.