改性生物炭对无机肥的吸附特性研究  

Study on the Adsorption Characteristics of Modified Biochar for Inorganic Fertilizers

作　　者：王洋 张艳 解海卫[1] 方帅 罗建云 司国炯 Wang Yang;Zhang Yan;Xie Haiwei;Fang Shuai;Luo Jianyun;Si Guojiong(School of Mechanical Engineering,Tianjin University of Commerce,Tianjin 300134,China;Tianjin Scono Thermal Energy Technology Co.,Ltd.,Tianjin 300384,China)

机构地区：[1]天津商业大学机械工程学院,天津300134 [2]天津市斯科诺热能技术有限公司,天津300384

出　　处：《山西化工》2025年第3期49-51,共3页Shanxi Chemical Industry

摘　　要：为提高生物炭对化肥的吸附能力,本文以核桃壳为原料,在马弗炉中限氧600℃下制备核桃壳生物炭(WBC),并对其进行双氧水和紫外改性,得到两种改性生物炭(HWBC和UWBC)。对3种生物炭进行比表面积、电导率、pH和傅里叶红外光谱表征分析,并结合吸附动力学模型和吸附等温线模型探究其对钾肥的吸附性能。结果表明,UWBC的比表面积约为WBC的2.89倍,表面官能团增多,这使得UWBC对钾肥的吸附能力更强。与WBC相比,HWBC和UWBC对钾肥的吸附能力分别提高了1.37倍和1.55倍。3种生物炭对化肥的吸附过程均符合准二阶动力学模型和Langmuir模型,表明吸附过程主要为化学吸附且以单分子层吸附为主。In order to improve the adsorption capacity of biochar to chemical fertilizer,walnut shell biochar(WBC)was prepared in Muffle furnace at 600℃,and was modified by hydrogen peroxide and ultraviolet to obtain two kinds of modified biochar(HWBC and UWBC).The specific surface area,electrical conductivity,pH,and Fourier infrared spectroscopy of the three biochar were analyzed,and the adsorption properties of the three biochar were investigated by combining the adsorption kinetics model and adsorption isotherm model.The results show that the specific surface area of UWBC is about 2.89 times that of WBC,and the surface functional groups are increased,which makes the adsorption capacity of UWBC to potassium fertilizer stronger.Compared with WBC,the adsorption capacity of HWBC and UWBC was increased by 1.37 and 1.55 times,respectively.The adsorption processes of three kinds of biochar on chemical fertilizer were consistent with the quasi-second-order kinetic model and Langmuir model,indicating that the adsorption process was mainly chemical adsorption and single-molecular layer adsorption.

关 键 词：生物炭 改性生物炭 核桃壳 吸附 钾肥 

分 类 号：TQ424.2[化学工程]