School of Natural and Applied Sciences, Northwestern Polytechnical University, Xi'an, 10072, China.
The Institute of Hydrogeology and Environmental Geology, CAGS, Shijiazhuang, 050061, Hebei Province, China.
Environ Sci Pollut Res Int. 2018 Jun;25(17):16702-16709. doi: 10.1007/s11356-018-1843-3. Epub 2018 Apr 2.
In the Hebei Plain of North China, 70% of the inhabitants depend on groundwater for drinking water. Little is known regarding high-iodine concentrations in groundwater because there have been few systematic studies on high levels of iodine in groundwater in this region. To help identify the mechanisms that control the spatial distribution of iodine in groundwater, 61 samples of shallow groundwater and 161 samples of deep groundwater were collected along a sample section from Taihang Mountain to the Bo Sea. There were four pockets of high-iodine concentrations along the sample section. As the groundwater depth increased, the ratio of undetected iodine decreased, and the ratio of high-iodine concentrations increased. The high-iodine concentrations in the groundwater reflect the geological and sedimentary settings, and were mainly controlled by pH and Eh. Iodine concentrations were particularly high when the pH was between 7.3 and 8.5, and there was an inflection point at 150 μg/L in the curve of the relationship between iodine concentrations and Eh.
在中国华北平原，有 70%的居民依赖地下水作为饮用水。由于该地区对地下水高碘水平的研究很少，因此对高碘地下水的浓度知之甚少。为了帮助确定控制地下水中碘空间分布的机制，在太行山到渤海的采样剖面沿线采集了 61 个浅层地下水样本和 161 个深层地下水样本。沿采样剖面有四个高碘浓度带。随着地下水深度的增加，未检出碘的比例降低，高碘浓度的比例增加。地下水中的高碘浓度反映了地质和沉积环境，主要受 pH 值和 Eh 值控制。当 pH 值在 7.3 到 8.5 之间时，碘浓度特别高，并且在碘浓度与 Eh 值关系曲线中存在 150μg/L 的拐点。
