【摘要】 研究了银硫代硫酸盐在活性炭上的吸附行为。考察了硫代硫酸钠和亚硫酸钠浓度、温度和溶液pH对活性炭吸附银硫代硫酸盐的影响，采用了多种动力学模型拟合吸附过程，并通过XPS和FT-IR检测手段对其机理进行表征。结果表明：银硫代硫酸盐在活性炭上的吸附动力学符合准二级动力学模型，活性炭对银硫代硫酸盐的吸附等温线符合Freundlich模型。银在活性炭的吸附容量随着温度的升高而略有下降。在温度25℃、初始pH=8、初始银浓度500 mg/L、n（Na₂S₂O₃）/n（AgNO₃）=8（摩尔比）、n（Na₂S₂O₃）/n（Na₂SO₃）=5（摩尔比）、吸附时间5 h的最佳条件下，活性炭对银硫代硫酸盐络合物的饱和吸附容量最高可达18 mg/g。更多还原

【Abstract】 The adsorption behavior of silver thiosulfate on activated carbon was studied.Effects of concentration of sodium thiosulfate and sodium sulfite, temperature, and pH value on adsorption behavior of silver thiosulfate on activated carbon were investigated.Various kinetic models were used to fit the adsorption process, and the mechanism was characterized by XPS and FT-IR detection methods.The results show that the adsorption kinetics of silver thiosulfate on activated carbon conforms to the pseudo-second-order kinetic model.The adsorption isotherms of activated carbon to silver thiosulfate fit to Freundlich model.The adsorption capacity of silver on activated carbon drops slightly with the increase of temperature.The maximum adsorption capacity of activated carbon to silver thiosulfate complex is 18 mg/g under the optimal conditions including temperature of 25 ℃,initial pH value of 8,initial silver concentration of 500 mg/L,n（Na₂S₂O₃）/n（AgNO₃）=8（molar ratio）,n（Na₂S₂O₃）/n（Na₂SO₃）=5（molar ratio）,and adsorption time of 5 h.更多还原