首页 | 本学科首页   官方微博 | 高级检索  
     检索      

粘土矿物对海水中主要营养盐的吸附研究
引用本文:俞志明,马锡年,谢阳.粘土矿物对海水中主要营养盐的吸附研究[J].海洋与湖沼,1995,26(2):208-214.
作者姓名:俞志明  马锡年  谢阳
作者单位:中国科学院海洋研究所!青岛,266071,中国科学院海洋研究所!青岛,266071,青岛化工学院!青岛明胶厂
基金项目:国家博士后基金,山东省自然科学基金!93E0157,国家科委重大基础研究攀登计划资助!PD B6-7-2
摘    要:对海水中磷盐和硝酸盐在粘土矿物上的吸附行为的研究发现,海水体系中高岭土对磷酸盐的吸附能力大于蒙脱土,其原因为,粘土颗粒的表层铝/硅结构比是控制磷酸盐吸附的主要因素,其中铝含量越高,肿附能力越大。考察PH、粘土酸改性处理等因素对吸附作用的影响,结果表明,PH<8.5的磷酸盐吸附PH曲线呈峰形,其吸附作用以阴离子交换为主;PH>8.5时磷酸盐的吸附作用以沉淀吸附为主。酸改性蒙脱土可提高吸附磷酸盐的能力

关 键 词:粘土矿物  吸附  磷酸盐  硝酸盐  海水
收稿时间:1993/8/23 0:00:00
修稿时间:1994/3/29 0:00:00

STUDY OF MAIN NUTRIENTS ADSORPTION ON CLAYS IN SEAWATER
Yu Zhiming,Ma Xinian and Xie Yang.STUDY OF MAIN NUTRIENTS ADSORPTION ON CLAYS IN SEAWATER[J].Oceanologia Et Limnologia Sinica,1995,26(2):208-214.
Authors:Yu Zhiming  Ma Xinian and Xie Yang
Institution:Institute of Oceanology, Acadcmia Sinica, Qingdao 266071;Institute of Oceanology, Acadcmia Sinica, Qingdao 266071;Institute of Oceanology, Acadcmia Sinica, Qingdao 266071
Abstract:The adsorption of main nutrients in seawater, phosphate and nitrate, on clays is studied. A new experimental phenomenon that phosphate adsorption capability on kaoline is greater than that on montmorillonite, which is explained as that the alumina-silica ratio of clays is the dominant factor for phosphate adsorption and the more the alumina content in clay surface layer, the stronger the phospliate adsorpt ion. The effects of pH and acid-modification for clays on adsorption are also examined. The pH curves of phosphate adsorption are peak-shaped and the dominant adsorption is considered as anion exchange reactions in pH < 8.5. When pH > 8.5the precipitation adsorption is dominant. The acid-modification for montmorillonite tan enhance Phosphate adsorption capability on it, but kaoline is just opposite from montmorillonite, i. e. acid-modification leading to the decrease of Phosphate adsor ption. The study of nitrate adsorption on clays shows that tke adsorption centage is generally < 6%, and so its adsorption on clays can be neglected.
Keywords:Clay minerals Adsorption Phosphate Nitrate Seawater
本文献已被 CNKI 维普 等数据库收录!
点击此处可从《海洋与湖沼》浏览原始摘要信息
点击此处可从《海洋与湖沼》下载免费的PDF全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号