改性生物质燃料灰渣对砷的吸附研究  

Adsorption of Arsenic in Water by the Modified Biomass Fuel Ash

作　　者：石建军[1] 梅若鹏 SHI Jianjun;MEI Ruopeng(School of Chemical Engineering,Anhui University of Science andTechnology,Huainan Anhui 232001,China)

机构地区：[1]安徽理工大学化学工程学院,安徽淮南232001

出　　处：《安徽理工大学学报（自然科学版）》2022年第5期56-62,共7页Journal of Anhui University of Science and Technology:Natural Science

基　　金：安徽省科技重大专项基金资助项目(201903a06020003)。

摘　　要：近年来,随着城市化和工业化的进程不断推进,砷污染形势日益严峻,对人们的生活环境造成了严重的影响,同时也对人的身体健康产生了威胁。砷污染问题已成为国内外学者研究的重要课题。以生物质燃料灰渣作为研究对象,通过一系列表征手段对生物质燃料灰渣进行研究,并对其用铁进行改性,通过等温吸附及吸附动力学等实验对生物质燃料灰渣改性前后对吸附水中砷的能力进行探究。实验表明,改性后的生物质燃料灰渣相较于原生物质燃料灰渣砷有着更好的吸附效果;对等温吸附实验的结果进行拟合,改性后生物质燃料灰渣对砷的吸附效果由2.9mg/g提升到5.4mg/g;使用Langmuir吸附模型对实验结果拟合比Freundlich模型能较好地描述吸附过程,吸附动力学更遵循准二级动力学吸附,表明生物质燃料灰渣对砷的吸附是以单分子层化学吸附形式为主。In recent years,with continuous progress of urbanization and industrialization,arsenic pollution has become increasingly serious in environment,easilycausing the serious pollution to people's living environment and hurting people's health.Arsenic pollution has gradually become the subject of in-depth research at home and abroad.This paper takes biomass fuel ash as the research object and studies the ash through a series of characterization methods.Through the isothermal adsorption and adsorption kinetics experiments,the adsorption capacity of arsenic in water before and after the modification of biomass fuel ash was explored.The biomass fuel ash was observed to be irregular particles under the micro morphology.According to the isothermal adsorption experiment,it was found that the modified biomass fuel ash had a better adsorption effect on arsenic than the raw biomass fuel ash.By fitting the results of the experiment,the adsorption effect of the modified biomass fuel ash on arsenic wasincreased from 2.9 mg/g to 5.4 mg/g.Fitting the experimental results with theLangmuir adsorption modelwillbetter describe the adsorption process than the Freundlich model.The adsorption kinetics follows the quasi second-order kinetic adsorption better,which indicates that the adsorption of arsenic by biomass fuel ash tends to be monolayer chemical adsorption.

关 键 词：砷污染 改性 生物质燃料灰渣 吸附 

分 类 号：O69[理学—化学]