摘要
为了有效解决地下水中铁锰超标的问题,本文提出了一种新的粉末活性炭(PAC)和臭氧联用去除铁和锰的方法,并探索PAC在臭氧氧化处理水中铁和锰的作用机理。首先研究PAC和臭氧单独处理铁和锰的效果;然后研究PAC和臭氧联用处理铁和锰的效果,并探究不同条件(pH、温度、PAC用量、氧化剂质量浓度)对水中铁和锰去除效果的影响;最后研究PAC在臭氧氧化处理水中铁和锰的作用机理。结果表明:PAC在不同条件下都能强化铁和锰被臭氧氧化,在PAC用量为0.3 g/L、臭氧质量浓度为5 mg/L、pH值为7.0、室温的条件下,5 min内铁和锰混合溶液质量浓度由0.5 mg/L迅速降到0.1 mg/L以下,达到相应排放标准要求;随着PAC用量的增加,铁和锰的残留质量浓度逐渐降低,这说明反应高度依赖PAC表面的活性位点,进一步证实了PAC对水中铁和锰去除效果的影响。扫描电镜(SEM)和Mapping分析等表征结果表明,反应后在PAC表面形成了铁氧化物和锰氧化物涂层,而这些氧化物涂层会进一步加快水中游离铁和锰的去除。
In order to effectively solve the problem of iron and manganese overload in groundwater,this paper proposes a new method of removing iron and manganese by combining powdered activated carbon(PAC)and ozone,and explores the mechanism of the effect of PAC in treating iron and manganese in water by ozone oxidation.The effect of PAC and ozone on the treatment of Fe and Mn alone was firstly investigated;Then the effect of PAC and ozone on the treatment of Fe and Mn in combination was investigated,and the effect of different conditions(pH,temperature,PAC dosage,and oxidant concentration)on the removal of Fe and Mn in water was investigated;Finally,the mechanism of the effect of PAC on the treatment of Fe and Mn in ozone oxidation water was investigated.The results showed that PAC could enhance the oxidation of Fe and Mn by ozone under different conditions.Under the conditions of PAC dosage of 0.3 g/L,ozone mass concentration of 5 mg/L,pH of 7.0,and room temperature,the mass concentration of Fe and Mn mixed solution rapidly decreased from 0.5 mg/L to 0.1 mg/L within 5 min,which met the requirements of corresponding emission standards;With the increase of PAC dosage,the residual concentrations of Fe and Mn gradually decreased,which indicated that the reaction was highly dependent on the active sites on the surface of PAC,further confirming the effect of PAC on the removal of Fe and Mn from water.The characterization results such as scanning electron microscopy(SEM)and Mapping analysis showed that the reaction formed iron oxide and manganese oxide coatings on the surface of PAC,and these oxide coatings would further accelerate the removal of free iron and manganese from water.
作者
张少杰
刘适搏
杨武
陈思齐
Zhang Shaojie;Liu Shibo;Yang Wu;Chen Siqi(College of Environment,Northeast Normal University,Changchun 130117,China;Jilin Province Bureau of Hydrology and Water Resources,Changchun 130028,China)
出处
《吉林大学学报（地球科学版）》
CAS
CSCD
北大核心
2023年第4期1228-1237,共10页
Journal of Jilin University：Earth Science Edition
基金
国家重点研发计划项目(2019YFE0117900)。
关键词
除铁
除锰
粉末活性炭
臭氧
吸附
氧化
iron removal
manganese removal
powdered activated charcoal
ozone
adsorption
oxidation
作者简介
张少杰(1994-),男,硕士研究生,主要从事水污染控制方面的研究,E-mail:zhangsj903@nenu.edu.cn;通信作者:杨武(1985-),男,博士,副教授,主要从事水污染控制方面的研究,E-mail:yangw104@nenu.edu.cn。
