编号：CYYJ03373
篇名：膨润土复合颗粒的表征及对Fe2+的吸附特性研究
作者：耿莘惠 肖利萍 丁蕊
关键词： 膨润土 钢渣 Fe2+ 吸附-聚沉
机构： 沈阳城市建设学院市政与环境工程学院 青岛理工大学环境与市政工程学院
摘要： To solve the limitation of the single material in treating water pollutants,the composite particle adsorbent was prepared with natural bentonite and steel slag.Using SEM,XRD,and FTIR to characterize the composite particles,the composite mechanism and its adsorption characteristics of Fe2+in sewage are studied.The results show that the distance between bentonite layers increases from 1.287 nm to 1.549 nm after high-temperature roasting.The composite particle has an obvious layered structure,rough surface and large specific surface area,which makes it have a strong surface adsorption capacity.The dioctahedral structure of montmorillonite does not change,but new substances such as NaAlSi2O6 are generated,which increase the alkalinity and strength of the particles.The adsorption of Fe2+accords with the BET multi-molecular layer adsorption.After the adsorption of Fe2+,the content of heavy metal ions on the surface of the particles increases and the particles are wrapped by the precipitation of heavy metal ions,indicating that the composite particles have the function of adsorption-precipitation of heavy metal ions in wastewater,which is an environmentally friendly adsorbent.
