Liu Yuan-Qing, Zhou Le, Lü Lin, Li Wei, Wang Xin-Feng, Deng Qi-Jun, Zheng Yi-di, Li Chang-Suo
801 Institute of Hydrogeology and Engineering Geology, Shandong Provincial Bureau of Geology & Mineral Resources, Ji'nan 250014, China.
Center for Hydrogeology and Environmental Geology Survey, China Geological Survey, Baoding 071051, China.
Huan Jing Ke Xue. 2023 Mar 8;44(3):1429-1439. doi: 10.13227/j.hjkx.202204161.
In order to study the hydrochemical characteristics and ion sources of pore water in the middle and upper reaches of the Mouwen River, 29 groups of pore-water samples were collected in the Laiwu Basin. The main ion characteristics and their controlling factors of pore-water in this area were analyzed by using correlation and principal component analysis, Piper trigram, and Gibbs diagram methods. The main material sources of pore water in this area were revealed. The results showed that HCO, NO, SO, and Ca were the main anions and cations in the pore water of the middle and upper reaches of the Mouwen River. With TDS >1000 mg·L as the standard, the normal water chemistry type was mainly HCO·NO·SO-Ca and HCO·SO-Ca·Mg, whereas the abnormal water chemistry type was mainly NO·Cl-Ca. The chemical evolution of groundwater was mainly influenced by rock weathering, cation alternation adsorption, and human activities. Na+K mainly came from silicate weathering and dissolution, and HCO, Ca, and Mg came from calcite weathering and dissolution involving carbonate and sulfuric acid. Alternation adsorption of cations and weathering of silicate rock provided a surplus of Ca and Mg for pore water. Industrial and mining activities such as domestic sewage mixing, agricultural planting activities, and iron and coal mining changed the chemical composition of pore water, especially NO exceeding the standard, which has become the main problem of the local groundwater chemical environment.
为研究牟汶河中下游孔隙水的水化学特征及离子来源，在莱芜盆地采集了29组孔隙水样品。采用相关性分析、主成分分析、派珀三线图和吉布斯图法分析了该地区孔隙水的主要离子特征及其控制因素，揭示了该地区孔隙水的主要物质来源。结果表明，HCO、NO、SO和Ca是牟汶河中下游孔隙水中的主要阴离子和阳离子。以TDS>1000 mg·L为标准，正常水化学类型主要为HCO·NO·SO-Ca和HCO·SO-Ca·Mg，异常水化学类型主要为NO·Cl-Ca。地下水的化学演化主要受岩石风化、阳离子交替吸附和人类活动影响。Na+K主要来自硅酸盐的风化和溶解，HCO、Ca和Mg来自方解石的风化和溶解，涉及碳酸盐和硫酸。阳离子交替吸附和硅酸盐岩石风化给孔隙水提供了过剩的Ca和Mg。生活污水混入、农业种植活动以及铁煤开采等工矿活动改变了孔隙水的化学成分，尤其是NO超标，已成为当地地下水化学环境的主要问题。
