3种沸石材料对水中氨氮的吸附特性对比
Comparison of Adsorption Characteristics of Three Zeolite Materials for Ammonia Nitrogen in Water
李美霖 1徐妍霞 1杨永远 1黄燕 1唐全 1田平 1刘磊1
作者信息
- 1. 浙江卓锦环保科技股份有限公司, 浙江 杭州 310000
- 折叠
摘要
针对养殖废水中氨氮浓度高、削减难度大的问题,选用 3 种沸石材料进行实验,考察所选沸石材料对水中氨氮的吸附特性.结果表明:3种沸石材料对溶液中氨氮的吸附以化学吸附为主,沸石A、沸石B和沸石C的平衡吸附量分别为 2.98 mg/g±0.05 mg/g、4.52 mg/g±0.03 mg/g和 3.83 mg/g±0.01 mg/g,以沸石B吸附效果最好;沸石投加量和溶液初始浓度的增加均可提高氨氮去除率,但单位吸附量会随沸石投加量的增加而减少,随溶液初始浓度的增加而增加;沸石A在溶液pH值为 6时,氨氮去除率和吸附量达到最大,为 3.44 mg/g,沸石B和沸石C均在溶液pH值为9 时,氨氮去除率和吸附量达到最高,分别为 4.88 mg/g和 4.69 mg/g.
Abstract
In response to the high concentration and difficulty in reducing ammonia nitrogen in aquaculture wastewater,three types of zeolite materials were selected for experiments to investigate the adsorption characteristics of the selected zeolite materials for ammonia nitrogen in water.The results showed that the adsorption of ammonia nitrogen in solution by three zeolite materials was mainly chemical adsorption.The equilibrium adsorption capacities of zeolite A,zeolite B,and zeolite C were 2.98 mg/g±0.05 mg/g,4.52 mg/g±0.03 mg/g,and 3.83 mg/g±0.01 mg/g,respectively.Zeolite B had the best adsorption effect.The increase of zeolite dosage and initial solution concentration can both improve the ammonia nitrogen removal rate,but the unit adsorption capacity will decrease with the increase of zeolite dosage and increase with the increase of initial solution concentration.When the pH value of the solution is 6,zeolite A has the highest ammonia nitrogen removal rate and adsorption capacity,reaching 3.44 mg/g.Both zeolite B and zeolite C have the highest ammonia nitrogen removal rate and adsorption capacity,reaching 4.88 mg/g and 4.69 mg/g,respectively,when the pH value of the solution is 9.
关键词
沸石/氨氮/吸附Key words
zeolite/ammonia nitrogen/adsorption引用本文复制引用
基金项目
浙江省生态环境科研和成果推广项目(2021HT0032)
浙江省生态环境科研和成果推广项目(2022HT0023)
浙江省重点研发计划项目资助(2021C03169)
浙江省重点研发计划项目资助(2023C03131)
出版年
2024
NETL
NSTL
万方数据