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Dissolved organic matter (DOM) in sediment porewaters from Lake Erhai, Southwest China was investigated using dissolved organic carbon (DOC) concentration, UV absorbance, fluorescence and molecular weight distribution. DOC exhibited a high concentration at the sediment–water interface with a rapid decrease to the oxic–anoxic interface at approximately 7 cm, and then increased with depth. Similar trends...
Complexation between Hg(II) and dissolved organic matter (DOM) collected from streams in Ontario, Canada, was studied using three-dimensional excitation emission matrix (3DEEM) fluorescence spectroscopy. The results show that DOM reacted with Hg(II) rapidly, and the complexation reached pseudo-equilibrium within 20 s. Maximum excitation/emission (Ex/Em) wavelengths shifted towards the longer wavelengths,...
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