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OALib Journal期刊
ISSN: 2333-9721
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0#柴油和原油水溶性成分在黑鲷（sparusmacrocephlus）体内的富集动力学
DOI: 10.3724/SP.J.1145.2014.00286, PP. 286-290
Keywords: 黑鲷,0#柴油,平湖原油,生物富集
Abstract:
石油是海洋环境中的一类重要污染物，为探索石油烃在海洋生物体内的生物富集动力学特征，应用半静态双箱动力学模型在室内模拟了黑鲷（sparusmacrocephlus）对0#柴油和东海平湖原油水溶性成分（wateraccommodatedfraction，waf）的生物富集实验，通过对富集与释放过程中黑鲷体内石油烃的动态检测以及对检测结果的非线性曲线拟合，获得黑鲷对0#柴油、原油waf的吸收速率常数k1、释放速率常数k2、生物富集因子bcf、平衡状态下黑鲷体内石油烃含量camax和生物学半衰期b1/2等动力学参数.拟合结果得到的各动力学参数分别为：黑鲷对0#柴油waf的吸收速率常数k1范围为3.46-4.87、k2为0.0476-0.0708、bcf为48.79-102.30、camax为1.53-2.93mg/kg、b1/2为9.79-14.57d；黑鲷对原油waf的吸收速率常数k1范围为2.12-5.75、k2为0.0363-0.0505、bcf为58.35-147.21、camax为4.01-7.00mg/kg、b1/2为13.71-19.08d.黑鲷对0#柴油、原油waf的吸收速率常数k1、bcf均随外部水体中石油烃浓度的增大而减少，对0#柴油和原油waf的释放速率常数k2与外部水体中石油烃浓度无明显相关性，camax整体随外部水体中石油烃浓度的增大而增大.对模型的拟合优度检验结果显示，模型的拟合优度良好.研究表明，0#柴油在黑鲷体内的富集量低于原油waf、释放量略高于原油waf，不同种类石油的烃类组分可能是主要控制因子之一.
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