福建地区断裂带温泉环境地球化学特征  

Environmental geochemical characteristics of hot springs in fault zone in Fujian

作　　者：姚炳宇 周晓成[2] 杜建国[1,2] 何苗 天娇 颜玉聪 李静超 董金元 欧阳澍培 刘峰立 王昱文 曾召君 陈曲菲 YAO Bingyu;ZHOU Xiaocheng;DU Jianguo;HE Miao;TIAN Jiao;YAN Yucong;LI Jingchao;DONG Jinyuan;OUYANG Shupei;LIU Fengli;WANG Yuwen;ZENG Zhaojun;CHEN Qufei(School of Earth Science and Resources,China University of Geosciences(Beijing),Beijing,100083,China;United Laboratory of High-Pressure Physics and Earthquake Science,Institute of Earthquake Forecasting,CEA,Beijing,100036,China;Economic and Technological Development Zone Brigade,Fire and Rescue Detachment of Urumqi,Fire and Rescue Department of Xinjiang,Urumqi,830009,China)

机构地区：[1]中国地质大学(北京)地球科学与资源学院,北京100083 [2]高压物理与地震科学联合实验室,中国地震局地震预测重点实验室(中国地震局地震预测研究所),北京100036 [3]新疆消防救援总队乌鲁木齐市消防救援支队经济技术开发区大队,乌鲁木齐830009

出　　处：《环境化学》2024年第7期2356-2372,共17页Environmental Chemistry

基　　金：中国地震局地震预测研究所基本科研业务费(CEAIEF20220213,CEAIEF2022030200,CEAIEF2022030205,CEAIEF20220507);国家重点研发计划(2018YFE0109700,2019YFC1509203);国家自然科学基金(41673106,42073063,4193000170,U2039207);IGCP项目724资助.

摘　　要：通过对福建地区断裂带附近温泉水样中主量元素和微量元素测定,采用水文地球化学和统计方法重点讨论了温泉水中有害元素地球化学特征,并利用WQI综合水质标识指数法进行水质评价.分析结果表明:(1)温泉水主量元素主要来源于硅酸盐矿物水解.F-浓度均超标,平均值为9.32 mg·L^(-1),沿海地区温泉水F-浓度普遍高于内陆地区.水—岩相互作用、Na^(+)—Ca^(2+)阳离子交换作用是控制温泉水中氟富集的主要地球化学因素.HCO_(3-)Na,HCO_(3)·SO_(4-)Na型水中氟含量较高,pH、温度和含氟岩石类型对温泉水中氟富集过程有重要影响.(2)研究区温泉水中砷浓度平均值为3.29μg·L^(-1),特殊的地质环境使得漳州地区砷浓度分布在空间上具有群体性.还原性—弱碱性环境、地热水的循环深度与热储温度和中小型地震的频繁发生会影响温泉水中砷的含量.(3)研究区温泉水中As与F-呈负相关,这与含水介质的岩性分布密切相关.同时由于阳离子交换作用也使得砷含量高的温泉水中Ca^(2+)较高,不利于F-富集.(4)温泉水质评价表明本次采集的温泉水均不适合作为生活饮用水和农业用水:SO_(4)^(2-)、Cl^(-)、F^(-)均出现不同程度超标,微量元素WQI综合水质标识指数在1类和3类之间,但个别温泉中Fe、Mn、Be、Tl元素出现超标情况.部分温泉中Li、Sr、F含量及水温达到理疗热泉标准,具有理疗保健的功效.研究结果为福建地区温泉开发提供了新的环境地球化学资料.The geochemical characteristics of harmful elements was discussed by means of hydrogeochemical and statistical methods in this paper,supported by the determination of major elements and trace elements in hot spring water samples near the fault zone in Fujian,and the water quality was evaluated by comprehensive water quality index(WQI)method.The results indicate that(1)The main elements of hot water are mainly derived from silicate mineral hydrolysis.The concentration of F-in hot spring water exceeds the recommended standard with an average of 9.32 mg·L^(-1),and the F-concentration of hot spring water in coastal areas was generally higher than inland areas.Water-rock interaction and Na^(+)—Ca^(2+)cation exchange are the main geochemical factor controlling the enrichment of fluorine from hot spring water.HCO_(3-)Na,HCO_(3-)SO_(4-)Na type water has higher fluorine content,and pH,temperature and fluoride-bearing rock type have important effects on the fluorine enrichment process in hot spring water.(2)The average arsenic concentration in hot spring water in the study area is 3.29μg·L^(-1),and the special geological environment makes the spatial distribution of arsenic concentration in the Zhangzhou area grouped.The reductive-weakly alkaline environment,the depth of geothermal water circulation and thermal storage temperature,and the frequent occurrence of small and medium-sized earthquakes affect the arsenic content in hot spring water.(3)The correlation between arsenic and fluoride in the hot spring water of the study area are negative,which is closely related to the lithological distribution of the water-bearing medium.At the same time,cation exchange also makes the Ca^(2+)higher in the hot spring water with high arsenic concentration,which is not conducive to F-enrichment.(4)The water quality evaluation results of the hot springs shows that the hot spring water samples collected are not suitable for drinking water and agricultural water.SO_(4)^(2-),Cl^(-)and F^(-)all exceed the standard to varying degrees.Alt

关 键 词：温泉水 氟 砷 水岩反应 水质评价 福建 

分 类 号：X-1[环境科学与工程] O6[理学—化学]