All Outputs (79)

Mathematical modelling of quantum yield enhancements of methyl orange photooxidation in aqueous TiO2 suspensions under controlled periodic UV LED illumination. (2014)
Journal Article
TOKODE, O., PRABHU, R., LAWTON, L.A. and ROBERTSON, P.K.J. 2014. Mathematical modelling of quantum yield enhancements of methyl orange photooxidation in aqueous TiO2 suspensions under controlled periodic UV LED illumination. Applied catalysis B: environmental [online], 156-157, pages 398-403. Available from: https://doi.org/10.1016/j.apcatb.2014.03.046

Quantum yields of the photocatalytic degradation of methyl orange under controlled periodic illumination (CPI) have been modelled using existing models. A modified Langmuir-Hinshelwood (L-H) rate equation was used to predict the degradation reaction... Read More about Mathematical modelling of quantum yield enhancements of methyl orange photooxidation in aqueous TiO2 suspensions under controlled periodic UV LED illumination..

The effect of pH on the photonic efficiency of the destruction of methyl orange under controlled periodic illumination with UV-LED sources. (2014)
Journal Article
TOKODE, O., PRABHU, R., LAWTON, L.A. and ROBERTSON, P.K.J. 2014. The effect of pH on the photonic efficiency of the destruction of methyl orange under controlled periodic illumination with UV-LED sources. Chemical engineering journal [online], 246, pages 337-342. Available from: https://doi.org/10.1016/j.cej.2014.03.002

The nature of photon interaction and reaction pH can have significant impacts on semiconductor photocatalysis. This paper describes the effect of pH on the photonic efficiency of photocatalytic reactions in the aqueous phase using TiO2 catalysts. The... Read More about The effect of pH on the photonic efficiency of the destruction of methyl orange under controlled periodic illumination with UV-LED sources..

A continuous flow packed bed photocatalytic reactor for the destruction of 2-methylisoborneol and geosmin utilising pelletised TiO2. (2013)
Journal Article
PESTANA, C.J., ROBERTSON, P.K.J., EDWARDS, C., WILHELM, W., MCKENZIE, C. and LAWTON, L.A. 2014. A continuous flow packed bed photocatalytic reactor for the destruction of 2-methylisoborneol and geosmin utilising pelletised TiO2. Chemical engineering journal [online], 235, pages 293-298. Available from: https://doi.org/10.1016/j.cej.2013.09.041

Taste and odour compounds, especially geosmin (GSM) and 2-methylisoborneol (2-MIB), cause major problems in both drinking water and aquaculture industries world-wide. Aquaculture in particular has experienced significant financial losses due to the a... Read More about A continuous flow packed bed photocatalytic reactor for the destruction of 2-methylisoborneol and geosmin utilising pelletised TiO2..

Effect of controlled periodic-based illumination on the photonic efficiency of photocatalytic degradation of methyl orange. (2012)
Journal Article
TOKODE, O.I., PRABHU, R., LAWTON, L.A. and ROBERTSON, P.K.J. 2012. Effect of controlled periodic-based illumination on the photonic efficiency of photocatalytic degradation of methyl orange. Journal of catalysis [online], 290, pages 138-142. Available from: https://doi.org/10.1016/j.jcat.2012.03.011

The use of controlled periodic illumination with UV LEDs for enhancing photonic efficiency of photocatalytic decomposition processes in water has been investigated using methyl orange as a model compound. The impact of the length of light and dark ti... Read More about Effect of controlled periodic-based illumination on the photonic efficiency of photocatalytic degradation of methyl orange..

A study of the kinetic solvent isotope effect on the destruction of microcystin-LR and geosmin using TiO2 photocatalysis. (2011)
Journal Article
ROBERTSON, P.K.J., BAHNEMANN, D.W., LAWTON, L.A. and BELLU, E. 2011. A study of the kinetic solvent isotope effect on the destruction of microcystin-LR and geosmin using TiO2 photocatalysis. Applied catalysis B: environmental [online], 108-109, pages 1-5. Available from: https://doi.org/10.1016/j.apcatb.2011.07.019

We have previously reported the effectiveness of TiO2 photocatalysis in the destruction of species generated by cyanobacteria, specifically geosmin and microcystin-LR. In this paper we report an investigation of factors which influence the rate of th... Read More about A study of the kinetic solvent isotope effect on the destruction of microcystin-LR and geosmin using TiO2 photocatalysis..

The degradation of microcystin-LR using doped visible light absorbing photocatalysts. (2010)
Journal Article
GRAHAM, D., KISCH, H., LAWTON, L.A. and ROBERTSON, P.K.J. 2010. The degradation of microcystin-LR using doped visible light absorbing photocatalysts. Chemosphere [online], 78(9), pages 1182-1185. Available from: https://doi.org/10.1016/j.chemosphere.2009.12.003

Microcystins are one of the primary hepatotoxic cyanotoxins released from cyanobacteria. The presence of these compounds in water has resulted in the death of both humans and domestic and wild animals. Although microcystins are chemically stable tita... Read More about The degradation of microcystin-LR using doped visible light absorbing photocatalysts..

The photocatalytic decomposition of microsystin-LR using selected titanium dioxide materials. (2009)
Journal Article
LIU, I., LAWTON, L.A., BAHNEMANN, D.W., LIU, L., PROFT, B. and ROBERTSON, P.K.J. 2009. The photocatalytic decomposition of microsystin-LR using selected titanium dioxide materials. Chemosphere [online], 76(4), pages 549-553. Available from: https://doi.org/10.1016/j.chemosphere.2009.02.067

Microcystins (cyclic heptapeptides) produced by a number of freshwater cyanobacteria are a potential cause for concern in potable water supplies due to their acute and chronic toxicity. TiO2 photocatalysis is a promising technology for removal of the... Read More about The photocatalytic decomposition of microsystin-LR using selected titanium dioxide materials..

A new generation of biocides for control of crustacea in fish farms. (2008)
Journal Article
ROBERTSON, P.K.J., BLACK, K.D., ADAMS, M., WILLIS, K., BUCHAN, F., ORR, H., LAWTON, L. and McCULLAGH, C. 2009. A new generation of biocides for control of crustacea in fish farms. Journal of photochemistry and photobiology B: biology [online], 95(1), pages 58-63. Available from: https://doi.org/10.1016/j.jphotobiol.2008.12.009

Farming of salmon has become a significant industry in many countries over the past two decades. A major challenge facing this sector is infestation of the salmon by sea lice. The main way of treating salmon for such infestations is the use of medici... Read More about A new generation of biocides for control of crustacea in fish farms..

Photocatalytic destruction of geosmin using novel pelleted titanium dioxide. (2008)
Journal Article
BELLU, E., LAWTON, L.A. and ROBERTSON, P.K.J. 2008. Photocatalytic destruction of geosmin using novel pelleted titanium dioxide. Journal of advanced oxidation technologies [online], 11(2), pages 384-388. Available from: https://doi.org/10.1515/jaots-2008-0225

Geosmin is produced by cyanobacteria and actinomycetes in surface waters. It causes undesirable earthy off-flavours in freshwater fish and is a major concern for the drinking water industry. This paper presents the first published study on the use of... Read More about Photocatalytic destruction of geosmin using novel pelleted titanium dioxide..

Passive sampling: partition coefficients for a silicone rubber reference phase. (2007)
Journal Article
YATES, K., DAVIES, I., WEBSTER, L., POLLARD, P., LAWTON, L. and MOFFAT, C. 2007. Passive sampling: partition coefficients for a silicone rubber reference phase. Journal of environmental monitoring [online], 9(10), pages 1116-1121. Available from: https://doi.org/10.1039/B706716J

Silicone rubber sheeting can be used as a passive sampling device for hydrophobic organic contaminants in the environment to determine the available concentrations in water and sediments. Reliable sampler-water partition coefficients are required to... Read More about Passive sampling: partition coefficients for a silicone rubber reference phase..

The photocatalytic destruction of the cyanotoxin, nodularin using Ti02. (2005)
Journal Article
LIU, I., LAWTON, L.A., BAHNEMANN, D.W. and ROBERTSON, P.K.J. 2005. The photocatalytic destruction of the cyanotoxin, nodularin using Ti02. Applied catalysis B: environmental [online], 60(3-4), pages 245-252. Available from: https://doi.org/10.1016/j.apcatb.2005.03.006

Titanium dioxide (TiO2) photocatalysis has been used to initiate the destruction of nodularin, a natural hepatotoxin produced by cyanobacteria. The destruction process was monitored using liquid chromatography-mass spectrometry analysis which has als... Read More about The photocatalytic destruction of the cyanotoxin, nodularin using Ti02..

A comparison of the effectiveness of TiO2 photocatalysis and UVA photolysis for the destruction of three pathogenic micro-organisms. (2005)
Journal Article
ROBERTSON, J.M.C., ROBERTSON, P.K.J. and LAWTON, L.A. 2005. A comparison of the effectiveness of TiO2 photocatalysis and UVA photolysis for the destruction of three pathogenic micro-organisms. Journal of photochemistry and photobiology A: chemistry [online], 175(1), pages 51-56. Available from: https://doi.org/10.1016/j.jphotochem.2005.04.033

TiO2 photocatalysis has demonstrated efficacy as a treatment process for water contaminated with chemical pollutants. When exposed to UVA light TiO2 also demonstrates an effective bactericidal activity. The mechanism of this process has been reported... Read More about A comparison of the effectiveness of TiO2 photocatalysis and UVA photolysis for the destruction of three pathogenic micro-organisms..

Occurrence of toxigenic cyanobacterial blooms in freshwaters of Sri Lanka. (2005)
Journal Article
JAYATISSA, L.P., SILVA, E.I.L., MCELHINEY, J. and LAWTON, L.A. 2006. Occurrence of toxigenic cyanobacterial blooms in freshwaters in Sri Lanka. Systematic and applied microbiology [online], 29(2), pages 156-164. Available from: https://doi.org/10.1016/j.syapm.2005.07.007

A previous pioneering study of freshwater bodies in Sri Lanka revealed the presence of toxic cyanobacteria in three out of four water bodies tested. It was therefore important to perform a more detailed investigation into the presence of cyanobacteri... Read More about Occurrence of toxigenic cyanobacterial blooms in freshwaters of Sri Lanka..

The destruction of 2-methylisoborneol and geosmin using titanium dioxide photocatalysis. (2003)
Journal Article
LAWTON, L.A., ROBERTSON, P.K.J., ROBERTSON, R.F. and BRUCE, F.G. 2003. The destruction of 2-methylisoborneol and geosmin using titanium dioxide photocatalysis. Applied catalysis B: environmental [online], 44(1), pages 9-13. Available from: https://doi.org/10.1016/S0926-3373(03)00005-5

Geosmin (GSM) and 2-methylisoborneol (MIB) are semi-volatile compounds produced by cyanobacteria in surface waters. These compounds present problems to the drinking water industry and in aquaculture because they can taint water and fish producing an... Read More about The destruction of 2-methylisoborneol and geosmin using titanium dioxide photocatalysis..

Processes influencing surface interaction and photocatalytic destruction of microcystins on titanium dioxide photocatalysts. (2002)
Journal Article
LAWTON, L., ROBERTSON, P., CORNISH, B., MARR, I. and JASPARS, M. 2003. Processes influencing surface interaction and photocatalytic destruction of microcystins on titanium dioxide photocatalysts. Journal of catalysis [online], 213(1), pages 109-113. Available from: https://doi.org/10.1016/S0021-9517(02)00049-0

Microcystins are a family of hepatotoxic peptides produced by freshwater cyanobacteria. Their occurrence in drinking water is of concern since chronic exposure to these toxins causes tumor promotion. It is therefore essential to establish a reliable... Read More about Processes influencing surface interaction and photocatalytic destruction of microcystins on titanium dioxide photocatalysts..

Mechanistic and toxicity studies of the photocatalytic oxidation of microcystin-LR. (2002)
Journal Article
LIU, I., LAWTON, L.A., CORNISH, B. and ROBERTSON, P., 2002. Mechanistic and toxicity studies of the photocatalytic oxidation of microcystin-LR. Journal of photochemistry and photobiology A: chemistry [online], 148(1-3), pages 349-354. Available from: https://doi.org/10.1016/S1010-6030(02)00062-X

Cyanobacterial toxins present in drinking water sources pose a considerable threat to human health. Conventional water treatment systems have proven unreliable for the removal of these toxins and hence new techniques have been investigated. Previous... Read More about Mechanistic and toxicity studies of the photocatalytic oxidation of microcystin-LR..

Physico-chemical treatment methods for the removal of microcystins (cyanobacterial hepatotoxins) from potable waters. (1999)
Journal Article
LAWTON, L.A. and ROBERTSON, P.K.J. 1999. Physico-chemical treatment methods for the removal of microcystins (cyanobacterial hepatotoxins) from potable waters. Chemical society reviews [online], 28(4), pages 217-224. Available from: https://doi.org/10.1039/A805416I

The incidence of cyanobacterial blooms in freshwaters, including drinking water reservoirs, has increased over the past few decades due to rising nutrient levels. Microcystins are hepatotoxins released from cyanobacteria and have been responsible for... Read More about Physico-chemical treatment methods for the removal of microcystins (cyanobacterial hepatotoxins) from potable waters..

Processes influencing the destruction of microcystin-LR by TiO2 photocatalysis. (1998)
Journal Article
ROBERTSON, P.K.J., LAWTON, L.A., CORNISH, B.J.P.A. and JASPARS, M. 1998. Processes influencing the destruction of Microcystin-LR by TiO2 photocatalysis. Journal of photochemistry and photobiology A: chemistry [online], 116(3), pages 215-219. Available from: https://doi.org/10.1016/S1010-6030(98)00312-8

We have previously reported the effectiveness of TiO2 photocatalysis in the destruction of the cyanotoxin microcystin-LR [P.K.J. Robertson, L.A. Lawton, B. Münch, J. Rouzade, J. Chem. Soc., Chem. Commun., 4 (1997) 393; P.K.J. Robertson, L.A. Lawton,... Read More about Processes influencing the destruction of microcystin-LR by TiO2 photocatalysis..

Destruction of cyanobacterial toxins by semiconductor photocatalysis. (1997)
Journal Article
ROBERTSON, P.K.J., LAWTON, L.A., MÜNCH, B. and ROUZADE, J. 1997. Destruction of cyanobacterial toxins by semiconductor photocatalysis. Chemical communications [online], 4, pages 393-394. Available from: https://doi.org/10.1039/A607965B

The rapid destruction of microcystin, a cyanobacterial toxin, using a titanium dioxide photocatalyst is observed; the process is extremely efficient with high concentrations of toxin completely undetectable within 10-40 min, depending on the initial... Read More about Destruction of cyanobacterial toxins by semiconductor photocatalysis..