01968nas a2200181   4500008004100000245009600041210006900137260000800206300001600214490000700230520132000237100001601557700001901573700002401592700002601616700002201642856012201664       2017                        eng d00aDegradation of metaldehyde in water by nanoparticle catalysts and powdered activated carbon0 aDegradation of metaldehyde in water by nanoparticle catalysts an  cJUL  a17861-178730 v243 aMetaldehyde, an organic pesticide widely used in the UK, has been detected in drinking water in the UK with a low concentration (< 1 mu g L-1) which is still above the European and UK standard requirements. This paper investigates the efficiency of four materials: powdered activated carbon (PAC) and carbon-doped titanium dioxide nanocatalyst with different concentrations of carbon (C-1.5, C-40, and C-80) for metaldehyde removal from aqueous solutions by adsorption and oxidation via photocatalysis. PAC was found to be the most effective material which showed almost over 90% removal. Adsorption data were well fitted to the Langmuir isotherm model, giving a q (m) (maximum/saturation adsorption capacity) value of 32.258 mg g(-1) and a K-L (Langmuir constant) value of 2.013 L mg(-1). In terms of kinetic study, adsorption of metaldehyde by PAC fitted well with a pseudo-second-order equation, giving the adsorption rate constant k(2) value of 0.023 g mg(-1) min(-1), implying rapid adsorption. The nanocatalysts were much less effective in oxidising metaldehyde than PAC with the same metaldehyde concentration and 0.2 g L-1 loading concentration of materials under UV light; the maximum removal achieved by carbon-doped titanium dioxide (C-1.5) nanocatalyst was around 15% for a 7.5 ppm metaldehyde solution.1 aLi, Zhuojun1 aKim, Jong, Kyu1 aChaudhari, Vrushali1 aMayadevi, Suseeladevi1 aCampos, Luiza, C.  uhttps://library.ncl.res.in/content/degradation-metaldehyde-water-nanoparticle-catalysts-and-powdered-activated-carbon