摘要
随着工农业持续发展,大量废水产生,威胁生态平衡和人类健康。膨润土因具有较大的比表面积、较强的溶胀能力、充足的吸附位点等特点,被广泛用于去除废水中的重金属、无机盐以及石油烃等。但是,天然膨润土的吸附量和热稳定性存在局限,为改善其性能,需要对膨润土进行改性处理。在总结近年来常用的膨润土的活化、改性方法的基础上,对改性膨润土在废水处理中的应用进展进行综述,主要包括针对氮磷、重金属和石油烃等污染物,分析并讨论了改性膨润土在废水处理应用中存在的问题以及未来的发展方向。
With the development of industry and agriculture,large amounts of wastewater were produced,threatening the balance of the ecosystem and human health.Bentonite,with a high surface area,strong swelling ability,and abundant adsorption sites,is frequently used to remove different pollutants in wastewater,such as heavy metals,inorganic salts,and petroleum hydrocarbons,et al.However,the adsorption capacity and thermal stability of natural bentonite are limited.Therefore,there is a compelling urge to modify the natural bentonite to improve its adsorption performance.On the basis of summarizing the methods of activation,organic,and inorganic modification of bentonite commonly used in recent years,the reasons for increasing the adsorption capacity of modified bentonite were explored.The application progress of modified bentonite in wastewater treatment,aiming at removing pollutants such as nitrogen and phosphorus,heavy metals,and petroleum hydrocarbons was reviewed.The existing problems and future research directions of the application of modified bentonite in wastewater treatment were analyzed and discussed.
作者
张璐
徐昕玉
石双欣
陈秋颖
胡志强
李向伟
孙娟
Zhang Lu;Xu Xinyu;Shi Shuangxin;Chen Qiuying;Hu Zhiqiang;Li Xiangwei;Sun Juan(College of Chemistry and Chemical Engineering,China University of Petroleum,Qingdao 266580,China;Jianghan Machinery Research Institute Co.,Ltd.,CNPC,Wuhan 430000,China)
出处
《山东化工》
2023年第24期222-224,228,共4页
Shandong Chemical Industry
基金
中国石油天然气集团有限公司科学研究与技术开发项目低成本油田污水处理技术研究(2021DJ6606)。
关键词
膨润土改性
吸附
废水处理
bentonite modification
adsorption
wastewater treatment