麦壳对模拟皮革废水中氨氮的吸附性能研究

以天然麦壳为生物吸附剂,研究其对模拟皮革废水中氨氮的吸附性能,并考察温度、氨氮的初始浓度、麦壳吸附剂的投加量、溶液的pH,以及吸附时间等因素对吸附效果的影响.实验结果表明,实验在温度为45℃、氨氮初始浓度为50mg/L、麦壳投加量为0.1g、溶液pH为8、接触时间为5h时,麦壳对氨氮的吸附去除效果最好,最大吸附量为8.144mg/g.经1mol/L的磷酸或氢氧化钠改性后,其氨氮吸附量反而下降.

Study on adsorption performance of ammonia nitrogen in simulated tannery wastewater by wheat shell

The adsorption performance of ammonia nitrogen in simulated tannery wastewater by wheat shells were investigated.The effect of temperature,the initial concentration of ammonia nitrogen,the dosage of wheat shell,the pH value of the solution and the adsorption time on the adsorption were also be discussed.The results showed that when the temperature was 45 ℃,the initial concentration of ammonia nitrogen was 50 mg/L,the wheat shells dosage was 0.1 g,the solution pH value was 8,the adsorption time was 5 h,the wheat shell had the best adsorption effect on ammonia nitrogen,and the maximum adsorption capacity was 8.144 mg/g.Compared with the inartificial wheat shell,the adsorption capacity of modified wheat shell was decreased.