Molecular size distributions of dissolved organic matter

摘要: Discrete molecular size distributions of dissolved organic matter (DOM) in natural waters and wastewaters are usually determined using an array ultrafiltration membranes stirred cells. However, many researchers neglect membrane rejection, resulting underestimation DOM low weight classes. In this paper, we develop a simple model, based on permeation coefficient, that can be used to improve the accuracy distributions. Since coefficients function material water composition, these must for every sample. The utility model is demonstrated by comparing unadjusted adjusted carbon (DOC) ground municipal wastewaters. For example, when rejection neglected, 41% DOC Biscayne Aquifer has apparent greater than 5,000 amu. Size permeating coefficient however, indicate only 16%