摘要
使用3种类型的沸石粉末(2种不同粒径分布的未改性沸石粉末和H_(2)O_(2)改性沸石粉),考察了其对农村生活污水中氨离子吸附能力。采用了多种技术,包括X射线衍射(XRD)分析、Brunauer-Emmett-Teller(BET)多层吸附理论测量实验,证明沸石粉末可以用作水中NH_(4)^(+)的吸附剂。通过动态光散射研究了沸石粉末的粒径。氮吸附-脱附等温线显示出Ⅰ型(纯微孔)和Ⅳ型(介孔)的混合等温线。这表明所研究的沸石材料是介孔(4.84 nm)和微孔(0.852 nm),并且含有缝隙/圆柱孔。改性沸石展现出良好的NH_(4)^(+)吸附性能(去除效率为72%),是一种潜在的吸附剂,可用于处理受氨离子污染的农村生活污水。
The adsorption capacity of unmodified Yolite powder and H_(2)O_(2)-modified Yolite powder was investigated for the adsorption of ammonia ions in rural domestic wastewater using three types of Yolite powders:two unmodified Yolite powders with different particle size distributions and H_(2)O_(2)-modified Yolite powder.Various techniques were used,including X-ray diffraction(XRD)analysis,Brunauer-Emmett-Teller(BET)multilayer adsorption theory measurements,the results demonstrated that Yolite powders could be used as adsorbents for NH_(4)^(+)ions in water.The particle size of Yolite powder was studied by dynamic light scattering.The nitrogen adsorption-desorption isotherms showed a mixture of type I(pure microporous)and type IV(mesoporous)isotherms.It was shown that the studied Yolite material was mesoporous(4.84 nm)and microporous(0.852 nm)and contained slit/cylindrical pores according to the density flood theory(QSDFT)adsorption branch model.The modified Yolite exhibited good NH_(4)^(+)adsorption performance(72%removal efficiency)and was a potential adsorbent for the treatment of rural domestic wastewater contaminated with ammonia ions.
作者
杨丽萍
YANG Liping(Hebei University of Science and Technology,Shijiazhuang Hebei 050000,China)
出处
《当代化工》
CAS
2024年第5期1223-1227,共5页
Contemporary Chemical Industry
基金
河北重点研发计划项目,污水处理系统中重金属污染物的检测及治理技术研究(项目编号:AB211960326)。
关键词
污水处理
改性沸石
吸附性
吸附模型
Wastewater treatment
Modified Yolite
Adsorption
Adsorption modeling
