醋酸改性核桃壳炭对苯酚吸附性能的研究  

Preparation of Acetic Acid Activated Walnut Shell Carbon for Phenol Adsorption

作　　者：边一凡 周凌峰 李志雄 吴明慧 马敏迪 李惠娟[1] Bian Yifan;Zhou Lingfeng;Li Zhixiong;Wu Minghui;Ma Mindi;Li Huijuan(Key Laboratory of State Forestry and Grassland Administration on Highly-Efficient Utilization of Forestry Biomass Resources in Southwest China(Southwest Forestry University),Kunming 650224,China)

机构地区：[1]西南林业大学西南地区林业生物质资源高效利用技术国家地方联合工程研究中心,云南昆明650224

出　　处：《云南化工》2024年第10期83-89,共7页Yunnan Chemical Technology

基　　金：云南大学生创新训练计划项目(202110677051);西南地区林业生物质资源高效利用技术国家地方联合工程研究中心(2023-GC03);云南省农业联合专项基金(2018FG001-051)。

摘　　要：为了消除酚类污染物对水体的危害,通过醋酸改性核桃壳制备核桃壳炭吸附剂的方法,研究了所制备的核桃壳炭对苯酚的吸附性能的用量、苯酚浓度、初始溶液pH值和吸附温度对苯酚吸附性能的影响因素,采用红外(FTIR)、X射线衍射(XRD)和扫描电镜(SEM)对所制备的核桃壳炭进行物相结构表征。结果表明,当醋酸为活化剂且质量分数为5%,焙烧温度400℃,2 h条件下制备的5%HAc活化核桃壳炭(400℃,2 h)具有最优的吸附苯酚的性能。该吸附材料具有石墨乱层结构,表面孔隙结构丰富。当核桃壳炭用量为0.2 g,苯酚初始质量浓度为10 mg/L,反应30 min,苯酚吸附率为92.4%。核桃壳炭对苯酚的吸附过程符合拟二级动力学模型,表明了所制备的醋酸改性的核桃壳炭具有优越的吸附苯酚性能,达到了以废治废、以废治污的效果。In order to eliminate the harm of phenolic pollutants to water,a method of preparing walnut shell carbon adsorbent with acetic acid modified walnut shell was used.The factors affecting the adsorption performance of the prepared walnut shell carbon for phenol,including the dosage,phenol concentration,initial solution pH value,and adsorption temperature,were studied.The phase structure of the prepared walnut shell carbon was characterized by infrared(FTIR),X-ray diffraction(XRD),and scanning electron microscopy(SEM).The results showed that when the HAc was used as an activator and concentration is 5%,calcination temperature of 400℃,and 2 h had the optimal performance in adsorbing phenol.The adsorbent material has a graphite disordered layer structure and a rich surface pore structure.When the amount of walnut shell charcoal is 0.2 g,the initial concentration of phenol is 10 mg/L,and the reaction is 30 min,the phenol adsorption rate is 92.4%.The adsorption process of walnut shell charcoal for phenol conforms to a pseudo second order kinetic model,indicating that the prepared acetic acid modified walnut shell charcoal has superior adsorption performance for phenol,achieving the effect of waste treatment and pollution control,adsorption performance for phenol wastewater.

关 键 词：醋酸改性 核桃壳活性炭 苯酚废水 吸附 

分 类 号：O613[理学—无机化学]