摘要
采用毛豆荚为生物质来源,氢氧化钾为活化剂制备活性炭吸附剂,通过扫描电镜、比表面积测定、傅里叶红外光谱和X射线衍射等对样品进行表征。采用批量实验研究了吸附剂对亚甲基蓝吸附的影响因素(p H和吸附时间)、吸附等温线、吸附动力学和吸附热力学等。结果表明,毛豆荚活性炭具有发达的孔隙结构,比表面积为631.6 m2/g;毛豆荚活性炭对亚甲基蓝有极高的吸附容量,最大吸附量达到1 050 mg/g。毛豆荚活性炭吸附亚甲基蓝的过程符合准2级动力学模型和Langmuir等温线模型,吸附速率主要受颗粒内扩散控制,吸附过程自发进行,属于吸热反应。毛豆荚生物材料制备吸附剂在印染废水处理具备良好应用前景和应用价值。
The soybean pods were used as biomass sources and potassium hydroxide was used as activator to prepare activated carbon adsorbent. The sample was characterized by scanning electron microscope, Brunauer-Emmett-Teller, Fourier transform infrared spectroscopy and X-ray diffraction. The influence factors of adsorbent on methylene blue（such as p H and adsorption time）, adsorption isotherm, adsorption kinetics and adsorption thermodynamics were studied by batch experiments. The results showed that, soybean pods activated carbon had developed pore structure, and the specific surface area was 631.6 m2/g. soybean pods activated carbon had an excellent adsorption capacity for methylene blue, and the maximum adsorption capacity could reach1 050 mg/g. Adsorption process of soybean pods activated carbon for methylene blue accorded with the quasi-second-order kinetic model and Langmuir isotherm model. The adsorption rate was mainly controlled by intra-particle diffusion, and the adsorption process was a spontaneous endothermic reaction.Soybean pods prepared activated carbon has good application prospect and value in the printing and dyeing wastewater treatment.
作者
冯胜
程萍
张志军
余沛霖
王润柏
刘曙光
FENG Sheng;CHENG Ping;ZHANG Zhijun;YU Peilin;WANG Runbai;LIU Shuguang(School of Environmental and Safety Engineering, Changzhou University, Changzhou 213164, China;School of Architecture and Environmental Engineering, Changzhou University Huaide College, Taizhou 14500, China)
出处
《水处理技术》
CAS
CSCD
北大核心
2018年第7期41-48,共8页
Technology of Water Treatment
基金
自然科学项目资助(41371446
41271498)
关键词
毛豆荚
活性炭
亚甲基蓝
吸附机理
soybean pod
activated carbon
methylene blue
adsorption mechanism
