摘要
为了探寻高效去除染料废水污染物的适宜吸附剂,以污水处理厂污泥和槟榔秸秆为原料,制备出活性炭(AC),并通过负载FeCl_(3),得到FeCl_(3)-活性炭(FAC),通过扫描电镜、比表面分析仪、红外光谱仪及X-射线光电子能谱仪对所得2种活性炭的物理化学特性进行表征。结果表明,铁离子成功地附载于AC上,且使FAC较AC的孔隙结构和比表面积均有一定程度的增加。当pH值处于4.0~10.0时,FAC较AC对亚甲基蓝的吸附能力更强。两活性炭的吸附等温线均符合Langmuir模型,其中FAC和AC的最大吸附量分别为133.33和341.30 mg·g^(−1)。此外,两活性炭的吸附动力学模型均符合二级动力学模型;通过热力学参数的求解可知,两活性炭对水中染料(亚甲基蓝)的吸附过程是吸热的、自发的、可行的。
Activated carbon(AC)was prepared from sludge and betel nut,and then loaded with FeCl_(3) to prepare FeCl_(3)-activated carbon(FAC).The physical and chemical properties of the prepared activated carbon before and after modification were characterized by scanning electron microscopy,specific surface area,FTIR infrared spectroscopy and X-ray photoelectron spectroscopy.The results showed that the Fe3+was successfully absorbed onto the surface of the activated carbons.Compared with AC,FAC increased to some extent its porous structure and surface area,and its functional groups changed significantly.FAC had a good adsorption capacity for methylene blue when pH value of the water was between 4 and 10.The adsorption isotherms of the two activated carbons fitted the Langmuir model,and the maximum adsorption capacities of FAC and AC were 341.30 and 133.33 mg·g^(−1),respectively.Moreover,the adsorption kinetic of the two activated carbons conformed to the second-order kinetic model.Thermodynamic calculation showed that AC and FAC are endothermic and spontaneous in adsorption process of dyes(methylene blue)in the water.Thus,FAC can be used as a biosorbent to remove dyes from contaminated wastewater.
作者
林德鑫
衣雪松
LIN Dexin;YI Xuesong(School of Ecological and Environment Sciencs/Hainan Key Laboratory of Agricultural and Forestry Environmental Process and Ecological Regulation,Haikou,Hainan 570228,China)
出处
《热带生物学报》
2023年第4期371-378,共8页
Journal of Tropical Biology
基金
国家自然科学基金项目(51968017)。
作者简介
第一作者:林德鑫(1996−),男,海南大学生态与环境学院2019级硕士研究生.E-mail:2918306480@qq.com;通信作者:衣雪松(1982−),男,博士,教授.研究方向:水处理与资源化.E-mail:cedar401@163.com。
