摘要
为了有效去除含氟地下水中的F-,以Ca(NO_(3))_(2)、(NH_(4))_(2)HPO_(4)和柠檬酸为主要原料,通过水热合成反应,制备了一种新型纳米复合吸附剂Nam-1,并通过吸附实验考察了吸附剂加量、反应温度、反应时间、溶液p H值、振荡速度和地下水中F-初始浓度对F-去除率的影响。结果表明,吸附剂Nam-1的加量越大、反应温度越高、反应时间越长以及振荡速度越大,F-去除率相对就越高,而溶液p H值和初始F-浓度越大,F-去除率相对就越低。在F-初始浓度均为10mg·L^(-1)的条件下,吸附实验的最佳参数为:新型纳米复合吸附剂Nam-1的加量为2g·L^(-1)、反应温度为30℃、反应时间为120min、溶液p H值为7、振荡速度为160r·min^(-1),在最佳实验参数下的F-去除率可以达到96.8%。研究结果表明,制备的新型纳米复合吸附剂Nam-1对地下水中的F-具有较好的去除效果。
In order to effectively remove fluoride ions from fluorinated groundwater,a novel nanocomposite adsorbent Nam-1 was prepared using calcium nitrate,diammonium hydrogen phosphate,and citric acid as the main raw materials through hydrothermal synthesis reaction.The effects of adsorbent dosage,reaction temperature,reaction time,solution pH value,oscillation speed,and initial concentration of fluoride ions in groundwater on fluoride ion removal rate were investigated through adsorption experiments.The results showed that the higher the dosage of adsorbent Nam-1,the higher the reaction temperature,the longer the reaction time,and the higher the oscillation speed,the higher the fluoride ion removal rate.However,the higher the solution pH and initial fluoride ion concentration,the lower the fluoride ion removal rate.Under the condition that the initial concentration of fluoride ions was all 10mg·L^(-1),the optimal parameters for the adsorption experiment were:the dosage of the new nano composite adsorbent Nam-1 was 2g·L^(-1),the reaction temperature was 30℃,the reaction time was 120min,the solution pH was 7,the oscillation speed was 160r·min^(-1),and the fluoride ion removal rate could reach 96.8%under the optimal experimental parameters.The research results indicate that the newly prepared nanocomposite adsorbent Nam-1 has a good removal effect on fluoride ions in groundwater.
作者
李娟
孙晨
刘锦鹏
张震
LI Juan;SUN Chen;LIU Jin-peng;ZHANG Zhen(Shaanxi Environmental Investigation and Assessment Center,Xi'an 710054,China;Zhongsheng Environmental Technology Development Co.,Ltd.,Xi'an 710054,China)
出处
《化学工程师》
CAS
2023年第12期45-48,44,共5页
Chemical Engineer
基金
陕西省自然科学基础研究计划项目(2022JQ-952)。
关键词
纳米复合吸附剂
地下水
氟离子
吸附效果
影响因素
nano composite adsorbent
groundwater
fluoride ions
adsorption effect
influence factor
