靖宇县玄武岩区矿泉水特征组分H_2SiO_3成因实验——以王大山泉为例  

Experiment on the Characteristic Component(H_2SiO_3)of the Mineral Water in the Basalt in Jingyu County:A Case Study of Wangdashan Spring

作　　者：闫佰忠[1] 肖长来[1] 梁秀娟[1] 马喆[1] 危润初[1,2] 吴世利 

机构地区：[1]吉林大学地下水资源与环境教育部重点实验室,长春130021 [2]长沙理工大学水利工程学院,长沙410000 [3]长白山自然保护区,吉林白山135200

出　　处：《吉林大学学报（地球科学版）》2015年第3期892-898,共7页Journal of Jilin University：Earth Science Edition

基　　金：国家"十一五"科技支撑计划项目(2006BAB04A09-02;2007BAB28B04-03);吉林省科技攻关项目(20100452)

摘　　要：以靖宇县典型泉岩样为实验材料,结合野外实际情况,考虑pH值和CO2影响因素设计了矿泉水中H2SiO3实验,对实验结果进行了化学动力学分析,并利用matlab建立数学模型分析了矿物反应的机理。结果表明:1)仅考虑pH值的情况下:初始pH值近中性(pH=7.25)时,实验溶液中H2SiO3释放量较小,反应难以发生;初始pH值为碱性(pH=8.10)时,实验溶液中H2SiO3缓慢增加,平均释放速率为3.08mg/(kg·d)。2)在考虑pH值和CO2情况下:初始pH值为碱性条件时,通入CO2能够较快促进H2SiO3产生,平均释放速率可由4.29mg/(kg·d)升高为12.00mg/(kg·d);初始pH值为弱酸性(pH=6.64)时,实验溶液中H2SiO3增加较快,通入CO2,溶液中H2SiO3释放速率稍微增加。3)实验溶液中H2SiO3释放规律符合Stanford一阶反应动力学模型。靖宇县矿泉水中H2SiO3主要来自偏硅酸矿物(斜长石、镁橄榄石、辉石)的反应。在中性条件下,玄武岩矿物很难反应;在碱性条件时,主要是玄武岩矿物的水解,反应缓慢;在弱酸性条件下,主要是玄武岩矿物与H+和CO2的反应,反应强度较大。The experiments under different conditions were designed by taking the typical springsamples in Jingyu in combination with the practical situation of the field,with considering the influencing factors of pH value and CO2.The experimental results were studied by chemical kinetic analysis and mineral reaction mechanism by matlab.The results showed that it is difficult to release H2SiO3 under the initial neutral pH value（pH=7.25）;H2SiO3increases slowly with the initial alkaline pH value（pH=8.10）;and the release rate is 3.08 mg/（kg·d）.CO2 could promote the release of H2SiO3,and the average releasing rate increased from 4.29mg/（kg·d）to 12.00mg/（kg·d）in initial alkaline pH value,although it is not significant in initial faint acid pH value.The release of H2SiO3 could be described by the Stanford first-order kinetic equation.H2SiO3 in mineral water of Jingyu is mainly produced by Metasilicate mineral magnesium（plagioclase,olivine,and pyroxene）reaction.It is hard to generate H2SiO3 in Neutral pH value.Under the condition of alkaline pH,H2SiO3 is produced by the hydrolysis of basalt mineral;and under the condition of faint acid,H2SiO3 is produced by the reaction of basalt mineral and H＋,CO2.

关 键 词：矿泉水 H2SiO3 化学动力学 矿物反应 吉林省靖宇县 

分 类 号：P641[天文地球—地质矿产勘探]