%0 Journal Article
%T Estudio de la fracci車n de materia org芍nica de mayor remoci車n en el proceso de coagulaci車n-floculaci車n usando agua superficial
%A Indiana Garc赤a
%J Nexo
%D 2011
%I Universidad Nacional de Ingenier赤a
%R http://dx.doi.org/10.5377/nexo.v24i1.596
%X In this work, we performed the separation of natural organic matter (MON) present in the raw water that supplies two water treatment plants, one from river (Boaco) and one from lake (Juigalpa), in two types: hydrophobic, formed by the fractions very hydrophobic (MH) and slightly hydrophobic (LH); and the hydrophilic type constituted by the charged (CHA) and neutral (NEU) fractions. These waters obtained from each fraction were subjected to a process of coagulation-flocculation-sedimentation on a laboratory scale using aluminum sulfate as a coagulant, wherein the hydrophilic fraction (CHA and NEU) was poorly removed (< 35 %) in comparison with the hydrophobic one (> 65 %). Surrogate parameters were used to characterise this MON such as dissolved organic carbon (COD), colour, ultraviolet absorbance (UV254) and specific ultraviolet absorbance (SUVA). Determination of SUVA values indicates a mixture of hydrophobic and hydrophilic organic matter in both raw waters as their values of specific ultraviolet absorbance (SUVA) were between 2-4 L/mg-m; however the hydrophobic fraction (MH + LH) was the predominant one, 63.6 % and 65 % measured as COD in dry season for Boaco and Juigalpa respectively, in rainy season, the percentage were a little higher (71.2 % and 66.1 %). Finally, it was found that the river water (Boaco) contains higher concentrations of trihalomethanes (89-166 米g/L) than the water lake (Juigalpa) (28-80 米g/L) after being chlorinated. Found that the hydrophobic fraction was the major contributor in 68.5 % (Boaco) and 78.6 % (Juigalpa) to the formation of trihalomethanes for dry season in both treated water. In rainy season, the THMs formation were a little higher. Keywords: Organic matter; Trihalomethanes; Fractionation; Superficial water En este trabajo, se realiz車 la separaci車n de la materia org芍nica natural (MON) presente en el agua cruda que abastece a dos plantas potabilizadoras, una de r赤o (Boaco) y otra de lago (Juigalpa), en dos tipos: hidrof車bica, constituida por las fracciones muy hidrof車bica (MH) y ligeramente hidrof車bica (LH); y el tipo hidrof赤lica formada por las fracciones cargada (CHA) y neutral (NEU). Las aguas obtenidas de cada fracci車n fueron sometidas a un proceso de coagulaci車n-floculaci車n-sedimentaci車n a escala de laboratorio usando sulfato de aluminio como coagulante; donde la fracci車n hidrof赤lica (CHA y NEU) fue poco removida (< 35 %) en comparaci車n con la hidrof車bica (> 65 %). Se utilizaron par芍metros sustitutos para caracterizar dicha MON como carbono org芍nico disuelto (COD), color, absorbancia ultravioleta (UV) y absorban
%K Materia org芍nica
%K Trihalometanos
%K Fraccionamiento
%K Agua superficial
%U http://www.lamjol.info/index.php/NEXO/article/view/596/421