[Distributions of COD and petroleum hydrocarbons and their relationships with occurrence of red tide in East China Sea].
Based on the data of COD and petroleum hydrocarbons collected in the cruise from April 25 to May 2, 2002 in intensive red tide occurrence areas in East China Sea, the distribution of COD, and petroleum hydrocarbons and the eutrophication index(EI) were analyzed. The results showed that the EI and COD value were both high in coastal water, and decreased gradually away from shore. After the preliminary study on the relationships between correlative factors and occurrence of red tide, it was found that high EI and COD were necessary. There would be great chances for the red tide to break out under conditions that the EI was between 2.5 and 15 and COD concentration was between 0.8 to 1.4 mg.L-1 in seawater, along with the favorable temperature and salinity.
College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266003, China. zcsong@mail.ouc.edu.cn
Chuansong
C
Zhang
Xiulin
X
Wang
Xiaoyong
X
Shi
Xiurong
X
Han
Xia
X
Sun
Chenjian
C
Zhu
Rong
R
Lu
D002681:China; D005068:Eutrophication; D057097:Harmful Algal Bloom; D006838:Hydrocarbons / Q000032:analysis*; D009792:Oceans and Seas; D010100:Oxygen; D010578:Petroleum / Q000032:analysis*; D012623:Seawater / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000032:analysis*
D006838:Hydrocarbons; D010578:Petroleum; D014874:Water Pollutants, Chemical; D010100:Oxygen