都柳江上游水体中锑的矿山源贡献与健康风险评估

刘凤竹; 张翅鹏; 杨泽延; 罗欢; 罗江兰

doi:10.11988/ckyyb.20220852

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长江科学院院报 ›› 2024, Vol. 41 ›› Issue (1) : 59-65. DOI: 10.11988/ckyyb.20220852

水环境与水生态

都柳江上游水体中锑的矿山源贡献与健康风险评估

刘凤竹¹, 张翅鹏^1,2, 杨泽延^1,3, 罗欢¹, 罗江兰¹

作者信息 +

Contribution Source and Health Risk Assessment of Antimony in Waters Upstream of Duliu River Polluted by Mining Activity

LIU Feng-zhu¹, ZHANG Chi-peng^1,2, YANG Ze-yan^1,3, LUO Huan¹, LUO Jiang-lan¹

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文章历史 +

摘要

以受锑矿开采污染的都柳江为研究对象,在上游河段采集水样和悬浮颗粒物样,利用切向超滤技术、S同位素技术及离子色谱法等获取相关理化数据,探究矿山活动对河流中锑(Sb)浓度的影响,以及不同水文条件下Sb形态转化与净化机制。研究表明:从上游初始污染点至三都县城段溶解态Sb浓度可由148.77 μg/L降至49.98 μg/L;受锑矿山影响干流 δ³⁴S值升高,介于-0.58‰~1.21‰,且与Sb浓度呈显著正相关关系(r=0.71,p<0.05);生产和闭矿的两座矿山溪流下游混合后对干流水体Sb浓度贡献比为1.3:1;水体中溶解态Sb浓度包含真溶解态和胶体态,约为颗粒态Sb含量的170倍;真溶解态Sb占比80%以上,主要以迁移性较强的SbO^-₃形态存在;大坝拦截作用下水库中悬浮颗粒物浓度相对其他2个河段较低,但其Sb含量较高;水体中的Sb向胶体及颗粒态转化较少,不易被吸附团聚去除;3个河段Sb的健康风险评价结果显示HI和CR分别介于3.59~10.77和2.52×10^-3~7.55×10^-3,可能对人体产生致癌风险;真溶解态Sb是Sb污染水体中影响人体健康的主要形态。研究结果可为流域水环境Sb污染治理及生态保护提供科学依据。

Abstract

This study focuses on the Duliu River, which has been contaminated due to antimony mining. Water and suspended particulate samples were collected from the upstream reaches and analyzed using tangential ultrafiltration, S isotope technology, and ion chromatography to obtain the physical and chemical properties. The aim is to investigate the effects of mining activities on the concentration of antimony (Sb) in rivers and the mechanisms behind the transformation and purification of Sb in different hydrological conditions. Results show that from the initial pollution point to the Sandu county section, the concentration of dissolved Sb decreased from 148.77 μg/L to 49.98 μg/L. Affected by antimony mining, the δ³⁴S value in mainstream Duliu River increased, ranging from -0.58‰ to 1.21‰ and exhibiting a significant positive correlation with Sb concentration (r=0.71,p<0.05). The contribution ratio of producing and closed mines to the Sb concentration in the downstream section was 1.3:1. The concentration of dissolved Sb, including truly dissolved and colloidal Sb, was approximately 170 times that of particulate Sb, with truly dissolved Sb accounting for over 80%, mainly in the form of SbO^-₃. Despite lower concentration of suspended particulates in the reservoir compared to river sections, the Sb concentration in reservoir was higher. Sb was less likely to transform into colloid and particulate and was not easily removed through adsorption and agglomeration. Moreover, health risk assessment indicated that the HI and CR values were in the ranges of 3.59-10.77 and 2.52×10^-3-7.55×10^-3, respectively, implying possible carcinogenic risks to humans. In conclusion, truly dissolved Sb was the primary form posing a health hazard. This study provides a scientific basis for Sb pollution control and ecological protection in the contaminated Duliu River.

导出引用

刘凤竹, 张翅鹏, 杨泽延, 罗欢, 罗江兰. 都柳江上游水体中锑的矿山源贡献与健康风险评估[J]. 长江科学院院报. 2024, 41(1): 59-65 https://doi.org/10.11988/ckyyb.20220852

LIU Feng-zhu, ZHANG Chi-peng, YANG Ze-yan, LUO Huan, LUO Jiang-lan. Contribution Source and Health Risk Assessment of Antimony in Waters Upstream of Duliu River Polluted by Mining Activity[J]. Journal of Changjiang River Scientific Research Institute. 2024, 41(1): 59-65 https://doi.org/10.11988/ckyyb.20220852

中图分类号： X524

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