Characteristics of petroleum and its correlation with environmental factors in Tianjin coastal area in summer
WANG Hong
TU Jianbo
XU Yushan
LIU Xianbin
Abstract：Based on the survey data of Tianjin coastal waters in Bohai Bay from 2009 to 2018,the intera-nnual variation trend and spatial distribution characteristics of petroleum in surface seawater were sys-tematically analyzed,the pollution status was evaluated,and the correlation between petroleum and other environmental factors was discussed.The results showed that the content of petroleum in the surface seawater of Tianjin coastal area in summer from 2009 to 2018 ranged from 0.024 9 to 0.056 0 mg/L,with an average of 0.037 9 mg/L,showing a downward trend with time.The spatial distribu-tion characteristics were higher in the near shore and lower in the far shore,and showed a decreasing trend from north to south.From 2009 to 2018,the proportion of relative clean and above(grade 1-3)water quality stations has been increasing,reaching 95％in 2018.There was a significant positive cor-relation between petroleum and active phosphate and inorganic nitrogen(p＜0.01),and the correlation coefficients were 0.191 and 0.398,respectively.There was a significant negative correlation between petroleum and salinity(p＜0.01),and the correlation coefficient was-0.306.There was a significant positive correlation between the petroleum and COD(p＜0.05),the correlation coefficient was 0.168.Compared with other sea areas in China.The concentration of petroleum in surface seawater in summer was at a medium level,and the petroleum pollution was relatively light.
Keywords：Tianjincoastal waterspetroleumdistribution characteristicscorrelation
Publication Date：2025-02-28
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：10( 146-155 )