摘要
海(咸)水混入是河口河水重要的地质过程,深刻地影响河水地球化学过程。本文系统采集夹河河口水样,分析海淡水混合过程的地球化学特征。结果表明,远离河口段(J10~J14)为淡水性质,主要受水-岩作用及人类活动等影响;近河口段(J1~J8)海水混入严重,F^-、Cl^-、Br^-、SO^(2-)_4、Na^+、K^+、Mg^(2+)、Ca^(2+)、盐度等明显较高,主要受海水混入影响。近河口段存在Na-Ca离子交换过程,约占Na^+总量的0.9%~1.5%,离子交换量随海水混入比例增加而增加,Na^+离子交换量与K^+,Ca^(2+)、Mg^(2+)、Br^-、F^-、SO^(2-)_4离子交换量相关,且河水离子含量与盐度回归系数略低于与盐度、Na^+交换量回归系数,表明河口段河水离子交换影响河水地球化学特征。
Seawater（ fresh water） mixture,an important geological procedure for estuarine water,affects deeply geo-chemical procedure. In this study,water samples were systemically collected and the geo-chemical characteristics of seawater mixture were analyzed.Water near the estuary（ J1-J8） is seriously mixed by seawater. While the water away from the estuary is characterized by fresh water,which results in obviously higher contents of F^-,Cl^-,Br^-,SO4^2-,Na^＋,K^＋,Mg^2＋,Ca^2＋and salinity. Ion contents in water near the estuary are mainly affected by seawater mixture,and those away from the estuary are affected by rock-water interaction and human activities. Meanwhile,Na-Ca ion exchange occurs near the estuary,with an amount of 0. 9% - 1. 5% of Na＋ions. The exchanged ions increase with increasing seawater ratio. The exchanged Na^＋ions are significantly correlated with the exchanged ions of K^＋,Ca^2＋,Mg^2＋,Br^-,F^-and SO4^2-,and the regression coefficients of ion contents with salinity are slightly lower than those with salinity and exchanged Na^＋ions. All of above indicate that ion exchange influences geo-chemical characteristics of water near the estuary.
作者
陈桥
戴维
孙琳
宋召军
张春荣
CHEN Qiao DAI Wei SUN Lin SONG Zhaojun ZHANG Chunrong(Shandong Provincial Key Laboratory of Depositional Mineralization ＆ Sedimentary Minerals, College of Earth Science and Engineering, Shandong University of Science and Technology, Qingdao 266590,Chin)
出处
《地球与环境》
CAS
CSCD
2016年第5期534-541,共8页
Earth and Environment
基金
国家自然科学基金项目(40901027
41106036
71303140)
中科院知识创新工程项目(KZCX2-YW-Q07-04)
山东省自然科学基金项目(ZR2011DQ006)
国家级大学生创新创业训练计划项目
关键词
河口
海水混合
离子交换
烟台夹河
estuary
seawater mixture
ion exchange
Jiahe River
Yantai City
