冰封期达里诺尔湖主要离子特征  

Major ions in Dali Lake during the icebound season

作　　者：甄志磊[1] 李畅游[1] 张生[1] 李文宝[1] 孙标[1] 朱永华[1,2] 郝世祺 杨久辉 

机构地区：[1]内蒙古农业大学水利与土木建筑工程学院,呼和浩特010018 [2]内蒙古自治区锡林郭勒盟水文勘测局,锡林浩特026000 [3]赤峰市克什克腾旗达里诺尔国家级自然保护区管理处,赤峰025373

出　　处：《环境化学》2015年第10期1901-1910,共10页Environmental Chemistry

基　　金：国家自然科学基金(51339002;51409288;51269016;51269017;51169011;51169017;51469025);高等学校博士学科点专项科研基金(20131515120005);内蒙古农业大学优秀青年科学基金(2014XYQ-10)资助

摘　　要：通过对内蒙古达里诺尔湖冰封期湖冰与湖水进行取样,分析总磷(TP)、总溶解性固体(TDS)、Mg2+、Ca2+、K+、Na+、Cl-、SO2-4、CO2-3和HCO-3离子在冰体及水体中的分布特征及迁移过程.结果表明,在冰体和水体阳离子中,Ca2+、Mg2+相对贫乏,在冰体中平均浓度分别为1.37 mg·L-1和7.0 mg·L-1,水体中平均浓度分别为4.01 mg·L-1和24.53 mg·L-1,Na+所占比例最高,冰体与水体中平均浓度均达到92%.CO32-、HCO-3和Cl-是冰体和水体中阴离子的主要组成部分,冰体中平均浓度分别为435.86、543.20、539.97 mg·L-1,水体中平均浓度分别为1773.90、2556.49、1890.08 mg·L-1.Piper图表明达里诺尔湖水化学类型以Na+-CO2-3-Cl--HCO-3型为主.Gibbs图显示岩石风化与蒸发浓缩作用对达里诺尔湖的离子含量影响显著.通过对TP、TDS、Mg2+、Ca2+和Cl-之间的关系分析可知,在水体中,Mg2+和Ca2+的组成随着深度的变化基本保持不变,而在冰体中呈现无规律的变化,在水中表现为基本不变;TP和Cl-在水体中没有相关性,在冰中相关性不明显.无论在水体中还是在冰体中,TP和TDS具有较好的相关性(水体:r=0.94;冰体:r=0.90),说明TDS可以在冰封期较好地示踪TP的迁移过程.Dali Lake as the research object in this present work is sampled in water and ice during the icebound season. Total phosphorus（ TP）,total dissolved solids（ TDS） and major ions（ Mg^2＋,Ca^2＋,K^＋,Na^＋,Cl^-,SO4^2-,CO3^2- and HCO3^-） were measured and analyzed. The results showed that the concentration of Ca^2＋and Mg^2＋in lake water and ice cations is relatively low,which were1. 37 and 7. 0 mg·L^-1 in ice and 4. 01 and 24. 53 mg·L^-1 in water,respectively. The dominated cation was Na^＋ and its concentration took the proportion of 92% whether in water or in ice of cations. CO3^2-,HCO3^-and Cl^- were the dominated ions in ice body and water body of anions. Their average concentrations are 435. 86,543. 20 and 539. 97 mg·L^-1 in ice body and 1773. 90,2556. 49 and 1890. 08 mg·L^-1 in water body,respectively. Piper figure indicated that the hydro-chemical type of the lake water quality belonged to Na^＋-CO3^2--Cl^--HCO3^-. Gibbs figure showed the ions composition was controlled by evaporation-concentration and rock weathering. By analyzing the correlations among TP,TDS,Mg^2＋,Ca^2＋and Cl^-,the compositions of Mg^2＋and Ca^2＋in water body displayed no change with depth,but in ice body the variation was irregular. And also,there was no correlation between TP and Cl^-in the water body and their correlation in the ice body was not obvious. However,TP and TDS had a stronger correlation,which r = 0. 94 in water and r = 0. 90 in ice,respectively. It indicated that TDS can trace the process of TP migration with the increase of ice thickness and water depth during the icebound season.

关 键 词：达里诺尔湖 冰封期 水化学类型 迁移 

分 类 号：X143[环境科学与工程—环境科学]