钴改性秸秆生物炭对尼泊金乙酯的吸附研究

Study on the Adsorption of Ethylparaben by Cobalt Modified Straw Biochar

以小麦秸秆为原料,通过浸渍法制备改性生物炭,对其采用XRD、SEM进行表征分析,研究钴改性生物炭对尼泊金乙酯(EP)的吸附性能。讨论了改性生物炭的用量、尼泊金乙酯的初始浓度,反应时间及反应温度对EP溶液的吸附影响。实验结果表明:改性生物炭对EP的吸附主要以化学吸附为主;在一定范围内,改性生物炭对EP的吸附效率随生物炭用量的增加而增加;反应温度对改性生物炭吸附EP的影响较大,在EP浓度为30 mg/L、生物炭添加量为5 g/L、温度为45℃条件下吸附4 h时EP最大去除率为95.5%。

Modified biochar was prepared from wheat straw by impregnation method,and characterized by XRD and SEM.The adsorption performance of cobalt modified biochar for ethyl paraben(EP)was studied.The effects of modified biochar dosage,the initial concentration of EP,reaction time and reaction temperature on the adsorption of EP solution were discussed.The experimental results showed that the adsorption of EP by modified biochar was mainly chemical adsorption;in a certain range,the adsorption efficiency of EP by modified biochar raised with the increase of biochar addition.The reaction temperature had great effect on the adsorption of EP by modified biochar,and the maximum removal rate was 95.5%when the concentration of EP was 30 mg/L,the amount of biochar was 5 g/L and the temperature was 45℃for 4 h.