Redox zonation in the process of river water infiltration in the Huangjia riverside well field, Shenyang City
SU Dong1,2, SU Xiao-si1,2, ZHANG Li-hua3, YUAN Wen-zhen1,2, LU Shuai1,2, ZUO En-de1,2, GAO Rui-min1,2
1. Key Laboratory of Groundwater Resources and Environment Ministry of Education, Jilin University, Changchun 130021, China;
2. Institute of Water Resources and Environment, Jilin University, Changchun 130021, China;
3. 904 Environment Surveying and Designing Academy of Heilongjiang Province, Harbin 150027, China
Based on the analysis of hydrogeological conditions and geological formations in the Huangjia riverside well field, Shenyang City, the redox zonation during water infiltration process was integrally studied on the basis of in-situ monitoring together with indoor experiments. Our study reveal that regular patterns of the redox zonation along the river water infiltration do exist in the riverbed sediments of Liaohe River.Successive arrangements of O2-NO3- mixed reduction zone, mangne-oxide reduction zone and iron-oxide reduction zone are found embedded in the depth of 0~20cm, 20~80cm, 80~90cm in the riverbed. It is implied that dissolved organic carbon (DOC) from the river water could not provide enough electrons as the reduction oxidants. DOC in river and the dissolved sedimentary organic carbon (SOC) involve in the redox reaction as carbon sources together.
