基于原子吸收光谱的醋酸修饰沙粒对铅离子的吸附行为研究  

Analysis the Adsorption Behaviors of Acetic Acid Modified Sand Grains for Lead Ions by Atomic Absorption Spectroscopy

作　　者：柴琳琳[1] 阿热依·木拉提 肖开提·阿布力孜[1] CHAI Lin-lin;Areyi Mulati;Shawket Abliz(College of Chemical Engineering,Key Laboratory of Fine Oil and Gas Fine Chemicals,Ministry of Education&Autonomous Region,Xinjiang University,Urumqi 830017,China)

机构地区：[1]新疆大学化工学院,石油天然气精细化工教育部&自治区重点实验室,新疆乌鲁木齐830017

出　　处：《光谱学与光谱分析》2023年第9期2775-2778,共4页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金项目(52163030)资助。

摘　　要：用醋酸对天然沙粒进行湿法修饰制备修饰沙粒,将其为固相的吸附分离微柱与FAAS联用,以FAAS为检测手段分析其对铅离子的吸附行为,优化吸附条件。用FTIR和SEM进行表征,其对铅离子的吸附性优于天然沙粒,对于粒径为38~74μm的修饰沙粒而言,当溶液pH为6、上样流速为1.5 mL·min^(-1)、吸附温度为室温时,其饱和吸附容量可达到28.7 mg·g^(-1)。修饰后沙粒对铅离子的吸附容量提高了13%,吸附率可达到92.6%。0.01 mol·L^(-1)硫酸、硝酸和盐酸溶液均有很好的解吸效果,综合考虑,选用0.01 mol·L^(-1)HCl溶液为最佳解吸剂,解吸率可达到97.3%。In this paper,the natural sand grains were modified by wet modification with acetic acid,and the modified sand grains obtained were used as sorbent in the micro solid-phase adsorption column.The atomic absorption spectrometry(AAS)as the detection method was connected to the micro-column,and the adsorption behavior of lead ions on the modified sand grains in the column was analyzed.At the same time the adsorption conditions were optimized.Identification of the surface modification characterized and performed based on FTIR and SEM.The results showed that the saturated adsorption of the modified sand grains for lead ions was superior to that of natural sand grains.The saturated adsorption of the modified sand grains reached 28.7 mg·g^(-1) under the following condition,including the size of the grains was 38~74μm,the sample pH was about 6,the loading flow rate of the solution through the micro-column was 1.5 mL·min^(-1),the adsorption temperature was room temperature.The adsorption capacity of lead ions on modified sand grains increased by 13%,and the adsorption rate could reach 92.6%.Different concentrations of HCl,H 2SO 4,and HNO 3 dilute solutions were selected for desorption experiments,and the experimental results showed that the desorption effect of 0.01 mol·L^(-1) hydrochloric acid solution is good,so that 0.01 mol·L^(-1) HCl solution was selected as the best desorption agent.The desorption rate reached 97.3%under optimal conditions.

关 键 词：修饰沙粒 铅离子 吸附性 

分 类 号：O657.3[理学—分析化学]