HPLC-ICP-MS法研究内蒙古锡盟和新疆塔城高碘地区地下水的总碘及碘形态特征

发布时间：2018-11-25 14:22

【摘要】：长期饮用高碘水将对人体造成危害,地下水总碘及碘形态分析对于高碘地区碘环境地球化学研究具有重要价值。本文采用高效液相色谱-电感耦合等离子体质谱联用技术对内蒙古锡盟与新疆塔城高碘地区地下水总碘及碘形态进行测定。研究表明:锡盟地区地下水中碘以I-形态为主,总碘量维持在200μg/L,个别点位达到600μg/L甚至1700μg/L,呈环状分布,从东北至西南呈现"低-高-低"的分布规律;塔城地区地下水中的碘以IO-3形态为主,总碘量不足100μg/L,个别点位接近200μg/L,呈层状分布,自东向西逐渐升高。分析认为,氧化性的条件利于不同碘形态之间的转化;溶解氧过高或过低都不利于碘的储存;碘会随着可溶性盐的流失而流失;沿河流的流向,下游地势较低,总碘得到积累。本研究结果对于锡盟和塔城地区科学预防甲状腺肿、制定法律法规具有指导作用。
[Abstract]:Drinking high iodine water for a long time will cause harm to human body. The analysis of total iodine and iodine speciation of groundwater is of great value to the geochemical study of iodine environment in high iodine area. High performance liquid chromatography-inductively coupled plasma mass spectrometry (HPLC-ICP-MS) was used to determine the total iodine and iodine speciation of groundwater in Ximeng and Tacheng, Xinjiang. The results show that the iodine in the groundwater in Ximeng area is mainly I- form, the total iodine content is maintained at 200 渭 g / L, and the individual sites reach 600 渭 g / L or even 1700 渭 g / L, showing a circular distribution, and the distribution pattern of "low high low" from northeast to southwest; The iodine in the groundwater in Tacheng area is dominated by IO-3, the total iodine content is less than 100 渭 g / L, and the individual sites are close to 200 渭 g / L, which are layered distribution and gradually increase from east to west. It is concluded that the oxidizing conditions are conducive to the transformation of different iodine forms, that too high or too low dissolved oxygen is not conducive to the storage of iodine, that iodine will be lost with the loss of soluble salt, and that along the flow direction of the river, the downstream topography is lower and the total iodine is accumulated. The results of this study can guide the scientific prevention of goiter and the formulation of laws and regulations in Ximeng and Tacheng areas.
【作者单位】：国家地质实验测试中心;中国地质科学院水文地质环境地质研究所;
【基金】：国家自然科学基金资助项目“高碘地区地下水和自来水中有机碘形态分析方法及遗传毒性”(41301566) 中国地质科学院基本科研业务费资助项目(YYWF201620)
【分类号】：P641.3

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