摘要
针对垃圾填埋场渗滤液污染地下水导致氨氮超标问题,利用乙二胺四乙酸二钠溶液(亦称EDTA)对天然沸石进行改性,研究改性沸石对氨氮污染物吸附的最佳条件。试验结果表明:利用0.2 mol/L乙二胺四乙酸二钠溶液改性天然沸石,天然沸石与EDTA改性溶液最佳固液配比为1∶10(g/mL),比天然沸石去除率提高32%;粒径为0.5~1 mm、1~2 mm的沸石对氨氮去除处理率相对较高;初始浓度20 mg/L,体积为200 mL的氨氮溶液,投加量5 g、吸附时间120 min、pH值在6~8范围内为最佳试验条件。
In order to solve the problem of ammonia nitrogen exceeding the standard caused by groundwater pollution by landfill leachate, natural zeolite was modified with EDTA solution, and the optimal conditions for adsorption of ammonia nitrogen pollutants by modified zeolite were studied. The experimental results show that natural zeolite was modified with 0.2 mol/L EDTA disodium solution, and the optimal solid liquid ratio of natural zeolite and EDTA modified solution is 1∶10(g/mL), which is 32% higher than the removal rate of natural zeolite. Zeolites with particle size of 0.5~1 mm and 1~2 mm have relatively high removal rate of ammonia nitrogen;The optimal test conditions were ammonia nitrogen solution with initial concentration of 20 mg/L, volume of 200 mL, dosage of 5 g, adsorption time of 120 min and pH value in the range of 6~8.
作者
孙述海
孟范金
李伟健
SUN Shuhai;MENG Fanjin;LI Weijian(Changchun Institute of Technology,Changchun 130021,Jilin,China)
出处
《吉林地质》
2022年第2期62-66,共5页
Jilin Geology
基金
吉林省教育厅“十三五”科学技术研究项目(JJKH20191270KJ)
吉林省科学技术厅重点研发项目(20200403027SF)。
关键词
EDTA
沸石
氨氮
吸附
EDTA
zeolite
ammonia nitrogen
adsorption
作者简介
孙述海(1979-),男,辽宁丹东人,长春工程学院副教授。
