摘要
以贝壳替换部分传统水泥基材料,研究其对污染物的吸附能力,可扩大水泥基材料的功能型工程应用范围。本文通过吸附动力学、等温吸附等原理论证了贝壳材料的吸附机理,讨论了pH值、接触时间和污染物浓度等影响因素对贝壳吸附性能的影响,并综述了贝壳在建筑领域的相关应用。结果表明,在水泥基材料中采用贝壳替代胶凝材料或天然骨料都展现出较好的吸附能力。贝壳吸附过程中最佳pH值为5~7,贝壳颗粒表面的活性位点有限,在一定浓度下就会达到饱和,同时贝壳的活性位点会随着粒径的减小而增多,选取小粒径的贝壳粉有利于增加吸收容量,提高去除效率。本文通过分析贝壳吸附性能及贝壳在水泥基材料中的应用,可为设计功能型水泥基吸附材料提供思路。
The use of seashells to replace traditional cement-based materials and study their adsorption capacity for pollutants can expand the functional engineering application range of cement-based materials.This paper first reviewed the principles of adsorption kinetics and adsorption isotherms to demonstrate the adsorption mechanism of seashell materials.Then the effects of pH value,contact time,pollutant concentration and other factors on the adsorption of heavy metal ions and basic dyes to seashells were discussed.Finally,the relevant applications of seashells in the construction field were reviewed.The results show that the experimental use of seashells instead of cementitious materials or natural aggregates in cement-based materials shows good adsorption capacity.The optimal pH value in the process of seashell adsorption is 5~7,the active site on the surface of seashell particles is limited,and that it would reach saturation at a certain concentration.The active site of seashell would increase with the decrease of particle size,so the seashell powder with small particle size is conducive to enhancing the absorption capacity and removal efficiency.By analyzing the adsorption performance of seashell and the applications of seashell in cement-based materials,this paper could provide ideas and methods for the design of functional cement-based adsorption materials from multiple angles.
作者
王冬丽
辛瑞
赵庆新
吴东辉
潘慧敏
袁丽丽
WANG Dongli;XIN Rui;ZHAO Qingxin;WU Donghui;PAN Huimin;YUAN Lili(College of Civil Engineering and Architecture,Northeast Petroleum University,Daqing 163318,China;Hebei Province Engineering Research Center for Harmless Synergistic Treatment and Recycling of Municipal Solid Waste,Yanshan University,Qinhuangdao 066004,China;Research and Development Center,Shenzhen Guoyi Park Construction Co.Ltd.,Shenzhen 518040,China)
出处
《硅酸盐通报》
CAS
北大核心
2023年第11期3945-3954,共10页
Bulletin of the Chinese Ceramic Society
基金
河北省自然科学基金(E2021107004)
深圳市科技研发资金资助项目(JSGG20210802152541012)。
关键词
贝壳
水泥基材料
重金属离子
染料
等温吸附线
吸附动力学
seashell
cement-based material
heavy metal ion
dye
adsorption isotherm
adsorption kinetics
