钻井废泥浆中重金属化学形态及潜在生态效应评价

利用化学萃取法对江苏9个油田的不同类型钻井废泥浆的重金属化学形态分布特征进行调查分析,同时选用Hakanson的潜在生态危害指数法对钻井废泥浆中的重金属总量进行生态效应评价。结果表明,钻井废泥浆中Cu、Pb、Zn、Cd、Cr主要以残渣态和有机结合态为主,活性形态含量较低;采用Hakanson的潜在生态危害指数进行评价,发现Cu、Pb、Zn、Cd都属于轻微生态危害水平,而Cr多属于中等水平,产生潜在生态危害的重金属主要为Cr。

The Chemical Morphology in Heavy Metal and Assessment of Potential-Ecological Effects on Waste Drilling Fluid

The depositing forms of metal in nine waste drilling fluid were surveyed by sequential extraction procedures and the total amount of heavy metal in Hakanson exponent had been evaluated.The results showed that heavy metals(Cu,Pb,Zn,Cd,Cr) were in forms of residue and strongly bound-organic,activated level was low.The metal(Cu,Pb,Zn,Cd) were light ecological risk level,Cr was middle,The principal metal of ecology risk was Cr.