烟台夹河河口海水混合过程的地球化学特征研究  

Geo-chemical Characteristic Analysis of Seawater Mixture in Estuary of Jiahe River,Yantai City,China

作　　者：陈桥[1] 戴维[1] 孙琳[1] 宋召军[1] 张春荣[1] 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)

机构地区：[1]山东科技大学地球科学与工程学院山东省沉积成矿作用与沉积矿产重点实验室,山东青岛266590

出　　处：《地球与环境》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

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.

关 键 词：河口 海水混合 离子交换 烟台夹河 

分 类 号：X142[环境科学与工程—环境科学]