生态学杂志2024，Vol.43Issue(6)：1799-1806,8.DOI:10.13292/j.1000-4890.202406.030
多雄藏布河水中溶解态砷的来源及其衰减机制
Sources and natural attenuation of dissolved arsenic in Dogxung Zangbo River
摘要
Abstract
Some of rivers on the Qinghai-Tibet Plateau have high dissolved arsenic(As)levels,posing a potential threat to the health of local residents.To identify the sources and natural attenuation of dissolved As in the rivers,we analyzed the dissolved As concentrations in 11 river water samples,3 hot spring samples,2 lake water samples,and 1 rainwater sample collected from the Dogxung Zangbu River.Results showed that As concentration in the hot spring samples was up to more than 9000 µg·L-1.The As concentrations in the two lake water samples were 14.1 and 93.8 µg·L1,respectively.The As concentrations of river samples ranged from 0.83 to 177 μg·L-1(mean 45.5 μg·L-1),with 64％of the samples exceeding 10 μg·L-1.The As concentration of rainwater sample was below 0.1 µg·L-1.The As-rich hot springs were an important source of dissolved As in river water,while other sources contributed less.From upstream to downstream,dilution,adsorption,and co-precipitation of As by river suspended matter or sediments are important processes for the natural attenuation of dissolved As in river water.These As-enriched river suspended matters or sediments are transported downstream and deposition,which may lead to high As levels in sediments and groundwater in downstream regions,thus affecting the drinking water safety of local residents.关键词
青藏高原/河水/砷/热泉Key words
Qinghai-Tibet Plateau/river water/arsenic/hot spring引用本文复制引用
闫雅妮,张俊文,张东,赵志琦..多雄藏布河水中溶解态砷的来源及其衰减机制[J].生态学杂志,2024,43(6):1799-1806,8.基金项目
国家自然科学基金项目(41930863)和陕西自然科学基金项目(2022JZ-19和2022JQ-229)资助. （41930863）
