摘要
以活性氧化铝(AA)为原料,采用铁盐浸渍法制备负载铁氧化物的活性氧化铝(FAA)除碑吸附剂。采用BET.SEM和EDS等技术对其进行表征,并考察了投加量、pH值、共存离子对FAA除碑的影响。结果表明,铁盐浸渍法能有效地将铁氧化物负载于活性氧化铝上;初始pH值在2~10时除碑效率能达到95%;除方申性能受SiO3^2-和H2PO4^-的影响较大,Ca^2+、CO3^2-、SO4^2-对除碑性能基本无影响;吸附等温线符合Langmuir等温吸附模型,吸附除碑过程符合准二级动力学方程;采用50g铁改性活性氧化铝连续过滤碑含量为40-60μg/L的地下水,能获得约590L碑达标出水,表明铁改性活性氧化铝具有一定实际应用潜力。
Activated alumina ( AA) was used as raw material to prepare iron-modified activated alumina ( FAA ) adsorbent for arsenic removal by iron salt impregnation method. The FAA was characterized by BET, SEM and EDS techniques. The effects of FAA dosage, pH and coexisting ions on arsenic removal by FAA were investigated. The experimental results showed that the iron hydroxide could be formed on the activated alumina effectively by iron salt impregnation method. The arsenic removal efficiency could reach up to 95% with initial pH of 2 - 10. The arsenic removal efficiency was affected by SiO3^2- and H2PO4^- greatly while Ca^2+, CO3^2-and SO4^2- had no effect on the arsenic removal efficiency. The adsorption isotherm could be described by the Langmuir isotherm adsorption model. The arsenic removal processes followed the pseudo-second-order kinetic equation. The 50 g of iron-modified activated alumina could filter 590 L of groundwater containing 40 - 60 μg/L of As( V ) to meet the drinking water standard of 10 μg/L, indicating that iron-modified activated alumina had certain application potential.
作者
孙佳文
席北斗
康得军
高婷
赵颖
龚天成
许江城
陈其晓
瞿聪
龚斌
SUN Jia-wen;XI Bei-dou;KANG De-jun;GAO Ting;ZHAO Ying;GONG Tian-cheng;XU Jiang-cheng;CHEN Qi-xiao;QU Cong;GONG Bin(State Environmental Protection Key Laboratory of Simulation and Control of Groundwater Pollution, Chinese Research Academy of Environmental Sciences, Beijing 100012 , China;College of Civil Engineering, Fuzhou University, Fuzhou 350116 , China)
出处
《中国给水排水》
CAS
CSCD
北大核心
2019年第7期15-20,共6页
China Water & Wastewater
基金
国家水体污染控制与治理科技重大专项(2018ZX07109-001)
福州大学贵重仪器设备开放测试基金资助项目(2018T034)
关键词
活性氧化铝
铁盐
改性
除碑
吸附
activated alumina
ferric salt
modification
arsenic removal
adsorption
