Authors: Mengyao He, Jingling Ren, Jiaqi Liu, Sumei Liu, Guiling Zhang, and Guodong Song
Journal: Marine Pollution Bulletin
The concentrations of dissolved arsenate in natural water has an important impact on human health. The distributions, seasonal variation and major influencing factors of total dissolved inorganic arsenic (TDIAs) were studied in the Yellow River. The concentrations of TDIAs in the middle and lower reaches of the Yellow River ranged from 4.3 to 42.4 nmol/L, which met the standards for drinking water of WHO. The seasonal variation of TDIAs concentration in the middle and lower reaches of the Yellow River was highest in summer, followed by autumn and winter, and lowest in spring. The influencing factors of TDIAs concentration in the middle and lower reaches of the Yellow River mainly include the hydrological conditions, topographical variation, the adsorption and desorption of suspended particulate matter (SPM) and the intervention of human activities. The absorption of TDIAs by phytoplankton in the Xiaolangdi Reservoir (XLD) is an important factor affecting its distributions and seasonal variation. The annual flux of TDIAs transported from the Yellow River into the Bohai Sea ranged from 1.1×105 to 4.5×105 mol from 2016 to 2018, which is lower than the flux in 1985 and 2009. The carcinogenic risks (CR) of TDIAs for children and adults were all within acceptable levels (<10−6).
天然水体中溶解态砷酸盐浓度对人体健康有重要影响。本文研究了黄河流域总溶解态无机砷（Total Dissolved Inorganic Arsenic, TDIAs）的分布、季节变化及其主要影响因素。黄河中下游TDIAs浓度在4.3~42.4 nmol/L间，符合世界卫生组织（World Health Organisation, WHO）生活饮用水标准。黄河中下游TDIAs浓度的季节变化表现为：夏季最高，秋季和冬季次之，春季最低。黄河中下游TDIAs浓度的影响因素主要包括水文条件、地形变化、悬浮颗粒物（Suspended Particulate Matter, SPM）的吸附解吸以及人类活动的干预。小浪底水库浮游植物对TDIAs的吸附是影响其分布和季节变化的重要因素。2016-2018年黄河向渤海输送的TDIAs的年通量为1.1×105~4.5×105 mol，低于1985年和2009年的通量。TDIAs对儿童和成人的致癌风险（Carcinogenic Risks, CR）均在可接受水平内（<10−6）。
（实习生刘熙茜编译）
