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对湛江湾陆源入海排污口海域多环芳烃(PAHs)浓度水平、成分组成、空间分布及来源方面的特征差异进行了研究。结果表明,共15种PAHs单体被检出,3、4环检出率均达100%,其中Ace、Fle、Ant为主要成份。3环单体含量以养殖与农业性质排污口海域最高,工业与商业排污口海域次之,生活与休闲排污口海域最小;4、5环含量表现为工业与商业排污口海域>生活与休闲排污口海域>养殖与农业排污口海域,有71.4%工业与商业性质排污口海域有6环单体检出,而ΣPAHs则表现为工业与商业排污口海域>养殖与农业排污口海域>生活与休闲排污口海域;聚类分析表明,各排污口海域PAHs有明显差异性。3~5环单体及ΣPAHs的含量与各项环境参数值的Spearman相关性分析结果显示均不存在显著相关。PAHs特征比值显示湛江湾陆源入海排污口海域PAHs来源于石油、石化燃料和植物性燃料的混合源。
The characteristics of polycyclic aromatic hydrocarbons (PAHs) concentration, composition, spatial distribution and origin of PAHs in the landfill into the sea of Zhanjiang Bay were studied. The results showed that a total of 15 kinds of PAHs monomer were detected, the detection rate of 3,4 rings reached 100%, Ace, Fle, Ant as the main ingredient. The content of 3-ring monomer is the highest in sea area of sewage outfall with farming and agricultural properties, followed by the sea of industrial and commercial sewage outfalls, the smallest of sea life and recreational outfalls. 4,5 The content of ring is characterized by the industrial and commercial sewage outfalls> Mouth area> aquaculture and agricultural sewage outfall area, 71.4% of industrial and commercial sewage outfall areas have 6-ring single detection, and ΣPAHs is manifested as industrial and commercial sewage outfall area> breeding and agricultural outfall area> living and leisure Sewage outfall area; cluster analysis showed that PAHs in the sewage outfall area have significant differences. The content of 3 ~ 5 ring monomers and ΣPAHs showed no significant correlation with the Spearman correlation analysis of environmental parameters. The PAHs characteristic ratios show that the PAHs in the landfill outfall of Zhanjiang Bay originated from the mixture of petroleum, petro-chemical and plant fuels.