为了更好地控制含油污泥的环境污染,通过实验分析了五种不同来源的含油污泥中多环芳烃(PAHs)的含量、来源以及总毒性当量浓度(TEQ),测定了不同有机溶剂浸提液的急性生物毒性,并对油泥污染水样的PAHs和急性生物毒性进行了分析。研究发现,不同含油污泥中PAHs含量为496.10~4 233.25μg·g(-1),PAHs总毒性当量(TEQ)为8.41~231.56μg·g(-1),炼化厂含油污泥中的PAHs主要来源于石油及其精炼产品的热转化,其他含油污泥中的PAHs主要来源于原油本身。正己烷是3种受试有机溶剂中最适合测量含油污泥急性生物毒性的溶剂。被污染水样中PAHs含量为9.68~385.16 ng·mL(-1),除被清罐油泥污染的水样外,其他油泥污染水样中苯并(a)芘(BaP)未超标,但所有测试水样都具有较高的急性生物毒性,相对发光抑制率最高达到87.46%,大大超过了毒性参照物100 mg·L(-1)的Zn(2+)的抑制率。
In order to control the contamination of petroleum sludge,the contents,origin and calculated total toxic equivalent(TEQ) of polycyclic aromatic hydrocarbons(PAHs) in five different petroleum sludge were experimentally studied.The acute biotoxicity of different organic extractions were determined through Vibrio fiseheri.The PAHs contents and acute biotoxicity of water samples contaminated by petroleum sludge were also detected.The results showed that the PAHs concentration in different petroleum sludge ranged between 496.10 to 4 233.25 μg·g(-1)and the TEQ of PAHs ranged between 8.41 μg·g(-1) to 231.56 μg·g(-1).The n-hexane was found to be the most suitable organic solvent for testing the acute biotoxicity of petroleum sludge.The PAHs contents ranged from 9.68 to 385.16 ng·mL(-1)in polluted water samples,and the contents of Ba P did not exceed the standard value except for the sample polluted by an oil tank-cleaning sludge.However,acute biotoxicity of polluted water samples were very high.The highest light inhibition rate 87.46%,was much more than the light inhibition rate of 100 mg·mL(-1)Zn(2+).