The Primary Study On The Adsorption Of Phenolic Compounds On Sediment Of The Yellow River

Sediment is the source and sink of pollutants in water. It is important to understand deeply different mass transfer process of chemical pollutants between sediment and water to precisely grasp their transport, transformation, and fate in the environment and control their pollution to the environment effectively. This paper was established in the fact that Baotou section of Yellow River is polluted seriously. The adsorption of five kinds of phenolic compounds on sediment of Yellow River was examined in this study. The transportation rules of phenolic compounds in sediment-water system of Yellow River were researched. As a result, some of the transportation rules were put forword, which may be given some reasonable evidence for forecast, prevention and control of organic compounds pollution in Baotou section of Yellow River, and the datum will be accumulated for the study of organic pollutants transportion in sediment-water system. The primary fruits that were found through the experimental datum are:1. The adsorption rate curves and istherms of five kinds of phenolic compounds were given in this paper. The adsorption of these phenolic compounds includes the speediness phase and the slow phase. Freundlish isotherm,Langmuir isotherm and BET isotherm were suggested as the appropriate types for five kinds of phenolic compounds.2. The influence of some factors such as pH value and ionic strength on the adsorption of these phenolic compounds is notable. Lower value of pH and higher ionic strength would increase the sorption of phenolic compounds.3. The content of organic matter of sediment is a important factor influencing the sorption of phenolic compounds. The partition plays a important role in the process of sorption of phenolic compounds into sediment of Yellow River.4. The effect of surfactant SDBS on sorption of phenolic compounds(o-nitrophenol, 2,4-dinitrophenol ,2,4-dichlorophenol and pentachlorophenol) in sediment of Yellow River is notable.The sediment-water partition coefficients K of phenolic compounds increased when the initial concentrations below the surfactant CMCs for SDBS.5. When there are more than two kinds of phenolic compounds in water-sediment system, competition adsorption would occur between them. The capacity of competition adsorption is determined by the sorption capacity and rate.