naa a22 4500 510752551 CHVBK 20180411083110.0 cr unu---uuuuu 180411e20130201xx s 000 0 eng 10.1007/s11270-013-1434-3 doi (NATIONALLICENCE)springer-10.1007/s11270-013-1434-3 Removal of Metaldehyde Through Photocatalytic Reactions Using Nano-Sized Zinc Oxide Composites [Elektronische Daten] [F. Doria, A. Borges, J. Kim, A. Nathan, J. Joo, L. Campos] Metaldehyde is a selective molluscicide used in the agricultural and residential sector to control slugs and snails for a wide variety of crops. In recent years, some water companies have started monitoring drinking water supply catchments for presence of this compound, with positive and concern results. Conventional techniques are yet to achieve complete efficient and feasible removal of metaldehyde. The aim of this study was to measure the efficiency of nano-sized zinc oxide/laponite composites (NZnC) in the effective removal of metaldehyde (influent concentration of 500μg dm−3) through the interaction of photocatalysis. Reaction time, pH of sample solution and NZnC mass were tested against each other using a rotatable central composite design method of experimentation. Statistical tests showed that linear effects of time, quadratic/linear effects of NZnC mass and the interaction of pH and NZnC mass proved to be the most significant variables for degrading metaldehyde. Optimal values of each variable for the highest removal efficiency were achieved, being pH equal to 10.4 and NZnC mass added equal to 28g. The rate of reaction was then predicted by non-linear regression of four models. The best fit was provided by the modified first-order with residual kinetic model, with the apparent degradation coefficient k equal to 0.0363min−1 and the lowest remaining metaldehyde concentration observed among all runs was 278.7μg dm−3. NZnC has shown to be a prominent nanotechnology for metaldehyde removal. Springer Science+Business Media Dordrecht, 2013 Zinc oxide nationallicence Metaldehyde nationallicence Pesticides nationallicence Advanced oxidation process nationallicence Photocatalysis nationallicence Doria F. Department of Civil, Environmental and Geomatic Eng, University College London, Chadwick Building, Gower Street, WC1E 6BT, London, UK aut Borges A. Department of Agricultural Engineering, Federal University of Viçosa, Ave. P. H. Rolfs, s/n, 36.570-000, Viçosa, MG, Brazil aut Kim J. Department of Civil, Environmental and Geomatic Eng, University College London, Chadwick Building, Gower Street, WC1E 6BT, London, UK aut Nathan A. Department of Engineering, University of Cambridge, Trumpington Street, CB2 1PZ, Cambridge, UK aut Joo J. Korea Institute of Construction Technology, Ilsanseo-Gu, 411-742, GoyangSi, Gyeonggi-Do, South Korea aut Campos L. Department of Civil, Environmental and Geomatic Eng, University College London, Chadwick Building, Gower Street, WC1E 6BT, London, UK aut Water, Air, & Soil Pollution Springer Netherlands 224/2(2013-02-01), 1-9 0049-6979 224:2<1 2013 224 11270 https://doi.org/10.1007/s11270-013-1434-3 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11270-013-1434-3 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Doria F. Department of Civil, Environmental and Geomatic Eng, University College London, Chadwick Building, Gower Street, WC1E 6BT, London, UK aut NATIONALLICENCE 700 1- Borges A. Department of Agricultural Engineering, Federal University of Viçosa, Ave. P. H. Rolfs, s/n, 36.570-000, Viçosa, MG, Brazil aut NATIONALLICENCE 700 1- Kim J. Department of Civil, Environmental and Geomatic Eng, University College London, Chadwick Building, Gower Street, WC1E 6BT, London, UK aut NATIONALLICENCE 700 1- Nathan A. Department of Engineering, University of Cambridge, Trumpington Street, CB2 1PZ, Cambridge, UK aut NATIONALLICENCE 700 1- Joo J. Korea Institute of Construction Technology, Ilsanseo-Gu, 411-742, GoyangSi, Gyeonggi-Do, South Korea aut NATIONALLICENCE 700 1- Campos L. Department of Civil, Environmental and Geomatic Eng, University College London, Chadwick Building, Gower Street, WC1E 6BT, London, UK aut NATIONALLICENCE 773 0- Water, Air, & Soil Pollution Springer Netherlands 224/2(2013-02-01), 1-9 0049-6979 224:2<1 2013 224 11270 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer