Analysis on migration and transformation law of arsenic between groundwater and fishponds in the Northen Suburb Groundwater Source Field, Zhengzhou

Based on the test results of the samples of groundwater, fishpond water, pond sediment and topsoil, analysis on migration and transformation laws of arsenic between them was executed. The SPSS statistical analysis software (V1.70) was used, in view to find out the influencing factors about migration and transformation of arsenic. It may be concluded that arsenic in groundwater was transferred to ponds through the irrigation supplies, which was adsorbed by the iron and manganese oxidation of fishpond sediment. As the changing of environment, the arsenite in the groundwater was transformed into arsenate in the fishpond water. The main factors of influencing the arsenic forms were pH,Eh,Fe and Mn in different environments. High pH and strong oxidation condition were conducive to the adsorption of arsenic in fishpond water, while low pH and strong reductive condition were conducive to the dissolution of arsenic. In understudy samples, the arsenic has shown significant correlation with Fe and Mn.