摘要：In this study, adsorption performance of polyvinyl alcohol (PVA) onto sediments of Yellow River was systematically investigated. Results showed that the sediments could effectively adsorb PVA so as to decrease its dissolved amount in the natural water. Kinetic experiments indicated that a rather rapid uptake of PVA occurred and the removal percentage could reach 60.2% by 24 h. Non-linear fitting method succeeded in discerning that both Toth and Koble-Corrigan models best fitted the experimental data, indicating the possible mono layer and physical adsorption of PVA on the sediments. Langmuir isotherm model also simulated the adsorption isotherm data better, and at 288 K, the maximum adsorption capacity of 356.56 mg/g for PVA uptake was obtained by Langmuir isotherm model. Both, the increase of temperature and solution pH values, would reduce the uptake of PVA. At the same time, the coexisting anions could inhibit the uptake of PVA to some extent. This research would be useful in the risk assessment and subsequent treatment and utilization of the Yellow River. It could also be a reference for other pollution adsorption performances onto the sediments in different rivers.
