中国环境科学 2024,39(6)：2549~2559 China Environmental Science
基于硫酸盐硫同位素的伊洛河流域河水溶解性重金属来源
张 东1*,杨锦媚1,黄兴宇1,刘松韬1,张忠义2 (1.河南理工大学资源环境学院,河南 焦作 454000；2.东华理工大学,江西
省大气污染成因与控制重点实验室,江西 南昌 330013)
摘要：借助伊洛河河水硫酸盐硫同位素(δ34SSO4)和溶解性重金属含量水平,研究伊洛河流域不同形式人类活动对河水溶解性重金属的影响.结果表明:伊洛河流域上游干流和支流河水溶解组分受金属矿山开采废水影响较大,洛河河水中溶解性硫酸盐浓度(SO42)和δ34SSO4均值分别为(173±108)mg/L和
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(3.1±2.1)‰(n=8),河水中Co、Fe、Mn、Ni、Zn、Mo、Cd、Pb和U等含量较高,伊河河水中SO42和δ34SSO4均值为(169±89)mg/L和(3.7±1.2)‰(n=6),
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河水中Cr、Co、Fe、Ni、Zn、Mo、Cd、W、Hg、Pb和U等含量较高. 伊洛河流域下游河水溶解性重金属受生活污水和工业废水影响较大,洛河河水中SO42和δ34SSO4均值分别为(121±30)mg/L和(9.4±0.8)‰(n=4),河水中V、Cr、Ni、As、W和Hg等含量较高,伊河河水中SO42和δ34SSO4均值分
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别为(122±22)mg/L和(10.5±2.4)‰(n=3),河水中V、U、Ni和As等含量较高.伊洛河流域源头河水溶解性重金属含量低,河水溶解组分来自大气降水,河水δ34SSO4值范围为(6.7‰~8.2‰).伊洛河流域河水溶解性重金属含量以及δ34SSO4值具有一致的空间差异性,δ34SSO4可以很好地说明河水中溶解性重金属以及硫酸盐来源.
关键词：伊洛河流域；溶解性重金属；溶解性硫酸盐；硫同位素；源解析
中图分类号：X522 文献标识码：A 文章编号：1000-6923(2024)06-2549-11
Sources of dissolved heavy metals in river water of the Yiluo River basin based on sulfur isotope of sulfate. ZHANG Dong1*, YANG Jin-mei1, HUANG Xing-yu1, LIU Song-tao1, ZHANG Zhong-yi2 (1.School of Resources and Environment, Henan Polytechnic University, Jiaozuo 454000, China；2.Jiangxi Province Key Laboratory of the Causes and Control of Atmospheric Pollution, East China University of Technology, Nanchang 330013, China). China Environmental Science, 2024,39(6)：2549~2559 Abstract：Sulfur isotopic values of riverine sulfate and dissolved heavy metal (DHM) contents were adopt to illustrate the effect of different human activities on the DHM contents in the Yiluo River (YLR). The results indicated that dissolved components in the upstream of YRB were heavily affected by the sulfide minerals exploration. In the upstream of Luo River, high average SO42- content of (173±108)mg/L (n=8) and low average δ34SSO4 value of (3.1±2.1)‰ (n=8) were detected in the river water, and heavy metals as Co, Fe, Mn, Ni, Zn, Mo, Cd, Pb and U had high concentrations in this reach. While in the upstream of Yi River, high mean SO42- content of (169±89) mg/L (n=6) and low mean δ34SSO4 value of (3.7±1.2) ‰ (n=6) were also detected, and heavy metals as Cr, Co, Fe, Ni, Zn, Mo, Cd, W, Hg, Pb and U had relatively high contents. Dissolved contents in the downstream of YRB were primarily affected by sewage and industrial wastewater. Average SO42- content of (121±30) mg/L and δ34SSO4 value of (9.4±0.8) ‰ (n=4) were monitored in the downstream of Luo River along with the increasing concentrations of V, Cr, Ni, As, W and Hg. Correspondingly, in the downstream of Yi River, average SO42- content of (122±22) mg/L and δ34SSO4 value of (10.5±2.4) ‰ (n=3) with the increasing concentrations of V, U, Ni, and As were found. Dissolved components in the source water of YLR were mainly derived from atmospheric deposition, and the river water was characterized with low level of DHMs and moderate δ34S values ranging from 6.7‰ to 8.2‰. The contents of DHMs and δ34SSO4 values in YRB had the same spatial variations, so that the δ34SSO4 can well interpret the sources of dissolved heavy metals and sulfate in the river water.
Key words：Yiluo River catchment；dissolved heavy metal；dissolved sulfate；sulfur isotope；source apportionment
地层中以金属硫化物矿物形式存在的硫占全球硫库的比例超过50%[1],这些金属硫化物矿物在化学风化过程中向水溶液释放SO42和H+[24].金属
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解性重金属来源的贡献及其影响范围对于流域水资源管理十分必要.
河水溶解性硫酸盐来源包括大气沉降、硫化物矿物氧化、石膏等蒸发盐溶解以及城市生活和工业废水等[8
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矿产开采会加剧这一风化过程,产生的废水不但含有大量SO42,而且重金属元素含量也较高,排入河流
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,这些来源硫酸盐硫同位素值差异明显,
会引起河水中溶解性硫酸盐和重金属含量增加[56],
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城市生活污水和生产废水排放也会造成河水溶解性硫酸盐和重金属含量升高,区分二者对河水溶
[7]
收稿日期：2024-11-29
基金项目：国家自然科学基金项目(41573095,41661144042) * 责任作者, 副教授, zhangdong@hpu.edu.cn
基于硫酸盐硫同位素的伊洛河流域河水溶解性重金属来源 - 论文
