稻壳灰对地下水中铁离子动态吸附研究  

Dynamic adsorption of iron ions in groundwater by rice husk ash

作　　者：张颖[1] 鲁岩[1] 赵佳英[1] 姜昭[1] 曹博[1] 宋秋霞[1] 苏光霞 李梦园[1] 

机构地区：[1]东北农业大学资源与环境学院,哈尔滨150030

出　　处：《东北农业大学学报》2015年第10期68-73,共6页Journal of Northeast Agricultural University

基　　金：国家科技支撑计划项目(2013BAJ12B01)

摘　　要：利用自主设计反应器装置,以稻壳灰为吸附剂,考查流速、铁离子初始浓度、吸附剂添加量等因素对稻壳灰动态吸附地下水中铁离子影响。探究H2SO4、HCl、HNO3等3种解吸剂对铁离子解吸效果。结果表明,进水流速为10 m L·min-1时,吸附过程相对平稳,达标排放水量达4 L;铁离子初始浓度为20 mg·L-1,400 min时出水已处于达标排放状态,可处理达标废水近4 L;吸附剂添加量为22.5 cm时,处理后废水可达标排放时间最长,稻壳灰对铁离子吸附量为4.19 mg·g-1。解析剂H2SO4解吸效果明显好于HCl和HNO3,H2SO4解吸量最大可达到0.96 mg·g-1,HCl和HNO3最大解吸量分别为0.79和0.83 mg·g-1。Using self-designed reactor unit where rice husk ash was used as the adsorbent,factors which include flow rate, initial concentration of iron ions, and amount of adsorbent needed, were examined on the effect of rice husk ash on the dynamic adsorption of iron ion in groundwater. At the same time, the effectiveness of H2SO4, HCl, and HNO3 for desorbent of iron ion was also studied. The result indicated that： when the influent rate was 10 m L · min-1, the adsorption process was relatively steady,the standard discharge of water was 4 L; when the initial concentration of iron ion was 20 mg· L-1, after400 min, the effluent discharge status of the wastewater treatment already complied with the entry volume of 4 L. When the adsorbent dosage was 22.5 cm, the discharge time of the wastewater was the longest, the amount of rice husk ash which adsorbed the iron ion was 4.19 mg · g-1. The desorption ability of the analytical agent H2SO4 was better than HCl and HNO3, H2SO4 desorption reached a maximum of 0.96 mg· g-1, and the maximum desorption of HCl and HNO3 were 0.79 and 0.83 mg· g-1,respectively.

关 键 词：铁离子 稻壳灰 动态吸附 吸附解吸 

分 类 号：X523[环境科学与工程—环境工程]