摘要
以稻秸为原料,分别通过水热炭化和热裂解炭化制备稻秸炭(分别记为水热炭和热解炭),通过傅立叶红外线光谱(FT-IR)、X射线衍射(XRD)、扫描电子显微镜(SEM)和BET分析,比较两种稻秸炭的差异,通过亚甲基蓝、Cu^(2+)的吸附实验,分析其对有机物与金属离子的吸附性能。结果表明:水热炭表面含有更丰富的含氧官能团,结构更加规整,但比表面积低于热解炭;水热炭对亚甲基蓝的吸附能力略低于热解炭,但对Cu^(2+)的吸附能力显著高于热解炭;两种稻秸炭对亚甲基蓝的吸附及热解炭对Cu^(2+)的吸附通过表面吸附及颗粒内扩散共同发挥作用,更符合Freundlich模型;水热炭通过表面含氧官能团与Cu^(2+)相互作用,对吸附Cu^(2+)具有显著优势,Langmuir模型更适合于对其吸附数据进行拟合。
Preparation of hydrothermal carbonization and pyrolytic carbonization products with rice straw as raw material,the characterization of the two carbon products,namely hydrothermal carbon(HC)and pyrolytic carbon(PC)was compared by Fourier transform infrared spectroscopy(FT-IR),X-ray diffraction(XRD),scanning electron microscope(SEM)and BET analysis,and the adsorption performance of organic compounds and metal ions were analyzed by methylene blue and Cu^2+adsorption test.The results showed that the HC contained a richer oxygen-containing functional group on the surface and its structure was more regular than PC,but its specific surface area was smaller.The adsorption capacity for methylene blue of HC was slightly lower,and the adsorption capacity for Cu^2+was significantly higher than that of PC.The adsorption of methylene blue on both carbon products and Cu^2+on PC mainly depended on the interaction of surface adsorption and particle diffusion,and the adsorption data more fit with Freundlich model.Through the interaction of oxygen-containing functional groups with Cu^2+,HC had remarkable advantages in the adsorption of metal ions,and Langmuir model was more suitable for the adsorption data fitting.
作者
向天勇
单胜道
张正红
蓝建明
XIANG Tianyong;SHAN Shengdao;ZHANG Zhenghong;LAN Jianming(Agriculture and Environment Branch of Jiaxing Vocational and Technical College,Jiaxing Zhejiang 314036;Key Laboratory of Recycling and Eco-treatment of Waste Biomass of Zhejiang Province,School of Environment and Natural Resources,Zhejiang University of Science and Technology,Hangzhou Zhejiang 310023)
出处
《环境污染与防治》
CAS
CSCD
北大核心
2019年第1期72-76,共5页
Environmental Pollution & Control
基金
浙江省公益性项目(No.2017C33226)
浙江省重点研发计划项目(No.2016C03G2130498)
关键词
稻秸
水热炭
热解炭
表征
吸附
rice straw
hydrothermal carbon
pyrolytic carbon
characterization
adsorption
