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《Ion Exchange and Adsorption》 2017-05
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SUN Lin;GAO Jianmin;HAO Zhijun;WANG Yuyu;LIU Chunping;School of Chemstry and Materials Science,Ludong University;Yantai Entry Exit Inspection and Quarantine Bureau;  
The treatment of dye wastewater is a serious problem for complex structures and resistant to natural biological degradation.The paper is inclined to present the results of its studies on determining the adsorptive properties for Acid Orange Ⅱ from the aqueous solution onto modified waste tea-leaves by H_3PO_4 and H_2O_2.In our experiment,the adsorption properties of Acid Orange Ⅱ have been used to determine the features of the modified waste tea-leaves under the various conditions,such as the adsorption time,the Acid Orange Ⅱ concentration,the temperature,as well as the pH value.The results showed that the surface of modified waste tea-leaves have the characteristics of coarse porous structure.The adsorption capacity of phosphoric acid,hydrogen peroxide modified waste tea-leaves for Acid Orange Ⅱ are 49.24 mg/g and 49.03 mg/g at the temperature 25℃ and pH 2.Besides,the results gained in our experiment also show that the adsorption of Acid Orange Ⅱ by the modified waste tea-leaves can be affected by the temperature too,for higher temperature benefits the adsorption,which implies that the adsorption belongs to an endothermic process.Adsorption process is fitted very well to the Langmuir isotherm model.At the same time,the dynamic adsorption has to be well fit for the Pseudo-first-order rate model at the various temperatures.The pH value is also an important factor that has effects on the adsorption of Acid Orange Ⅱ onto the modified waste tea-leaves with the increase of adsorption,which can be observed with the pH value decrease and the optimum pH is 2.0.
【Fund】: 国家自然科学基金资助项目(21171085);; 山东省自然科学基金资助项目(ZR2010BM027)
【CateGory Index】: O647.3;X791
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