水库9种重金属监测及水质评价OA

To investigate the concentration variations of 9 metal elements(Be,B,Ti,V,Co,Ni,Mo,Sb,and Ba)and the water environmental quality in a certain reservoir,continuous monitoring was conducted at 2 sampling sites from January 2024 to April 2025 for 16 consecutive months.The concentrations of the 9 metals were determined using a PerkinElmer NexION 2000 inductively coupled plasma mass spectrometer(ICP-MS).5 evaluation indices,including the heavy metal pollution index and Nemerow pollution index,were adopted to assess the heavy metal pollution level,and Pearson correlation analysis was performed to clarify the correlations among the 9 metal elements.The results showed that the maximum concentrations of Be,B,Ti,V,Co,Ni,Mo,Sb,and Ba were all complied with the standard limits,and the monthly average concentrations of the 8 metals,excluding Ti,exhibited slight variations.Evaluation results based on the heavy metal pollution index,Nemerow index,pollution degree index,and comprehensive water quality index indicated a low heavy metal pollution level at the 2 sampling sites of the reservoir in the study area.Pearson correlation analysis revealed that the correlation coefficients of Be-Ti,Be-Co,B-Mo,B-Sb,Ti-Co,Ti-Ni,Ti-Ba,V-Co,V-Ni,V-Sb,and Co-Ni were all higher than 0.45 and passed the significance test at the 0.01 level,implying that these paired metals may share common pollution sources.This study provides a reference for the assessment in reservoir of similar regions.