钻井泥浆路基材料重金属溶出特性及风险评估  

Leaching characteristics and risk assessment of heavy metals in roadbed material made of drilling mud

作　　者：宋春燕[1] 赵金刚 武桂芝[3] 李利霞 张楠[1] 李媛[1] 王鹏刚[4] SONG Chunyan;ZHAO Jingang;WU Guizhi;LI Lixia;ZHANG Nan;LI Yuan;WANG Penggang(Technology Inspection Center of Shengli Oilfield Branch,Dongying 257000,China;Sinopec(Shandong)Testing and Evaluation Research Co.,Ltd.,Dongying 257000,China;School of Environmental and Municipal Engineering,Qingdao University of Technology,Qingdao 266525,China;School of Civil Engineering,Qingdao University of Technology,Qingdao 266525,China;Qindao Municipal Engineering Design and Research Institute,Qingdao 266100,China)

机构地区：[1]胜利油田分公司技术检测中心,东营257000 [2]中石化(山东)检测评价研究有限公司,东营257000 [3]青岛理工大学环境与市政工程学院,青岛266525 [4]青岛理工大学土木工程学院,青岛266525 [5]青岛市市政工程设计研究院有限责任公司,青岛266100

出　　处：《青岛理工大学学报》2025年第1期79-86,共8页Journal of Qingdao University of Technology

基　　金：NSFC-区域创新发展联合基金重点支持项目(U22A20229)。

摘　　要：为解决钻井泥浆资源化问题,基于“以废治废”的理念,以普通硅酸盐水泥、粉煤灰等原料作为固化剂对水基钻井泥浆进行固化处理,制备成路基材料。研究了钻井泥浆路基材料不同液固比下重金属的溶出特性,并对路基材料应用的环境安全性进行风险评估。结果表明:经固化处理后,钻井泥浆中As和Pb的浸出量降低,而Hg的浸出量升高;钻井泥浆路基材料中4种重金属累积浸出量均随液固比的增大而增加;风险评估计算得到的Cr(Ⅵ)、As和Hg经口摄入、皮肤接触、呼吸吸入3种暴露途径的累积致癌风险和累积危害商,均处于环境风险可接受水平;路基材料中Pb的有效浸出量为0.022 mg/kg,远小于经ALM(成人血铅)模型计算得到的土壤环境铅基准值689.47 mg/kg,处于环境风险可接受水平。研究可为钻井泥浆资源化利用的环境安全性提供科学依据。In order to solve the problem of drilling mud resources and based on the concept of“treating waste with waste”,ordinary Portland cement,fly ash and other raw materials are used as curing agents to cure water-based drilling mud and prepare roadbed materials.The leaching characteristics of heavy metals in the roadbed material made of drilling mud under different liquid-solid ratios were studied,and the environmental safety risk assessment of the application of roadbed materials was carried out.The results showed that after curing treatment,the leaching amount of As and Pb in the drilling mud decreased,while the leaching amount of Hg increased;the accumulative leaching amount of four heavy metals in the roadbed material made of drilling mud all increased with the increase of the liquid-solid ratio;the cumulative carcinogenic risk and the cumulative hazard quotient obtained by evaluating and calculating Cr(Ⅵ),As and Hg through the three exposure routes of oral intake,skin contact and inhalation were all at an acceptable level of environmental risk;the effective leaching of Pb in roadbed materials was 0.022 mg/kg,which was far less than the soil environmental lead reference value of 689.47 mg/kg calculated by the ALM(adult blood lead)model and was at an acceptable level of environmental risk.The research can provide a scientific basis for the environmental safety of drilling mud resource utilization.

关 键 词：钻井泥浆 固化 路基材料 重金属 风险评估 

分 类 号：X705[环境科学与工程—环境工程]