摘要
选取重庆某地区3个页岩气田作为研究对象,研究了5个钻井平台页岩气开采过程中废水基和油基钻井岩屑中重金属、多环芳烃(PAHs)和石油烃的污染特性.结果表明,两类钻井岩屑中Ba元素平均含量明显高于其他重金属,废水基钻井岩屑的重金属以Zn、Ba、Cr、Ni、Cu、Pb为主,废油基钻井岩屑中的重金属以Ni、Cu、Zn、Pb、Ba、As、Cr为主且Ni、Cu、Zn、Pb平均含量超过《危险废物鉴别标准毒性物质含量鉴别》(GB5085.6-2007)标准限值.废水基和油基钻井岩屑中PAHs的范围分别为1.74～14.8mg/kg和302～595mg/kg,均未超过GB5085.6-2007标准限值.废油基钻井岩屑石油烃含量为112～213g/kg,远超GB5085.6-2007标准限值.同时,废水基和油基钻井岩屑中BaP超过《土壤环境质量农用地土壤污染风险管控标准(试行)》(GB15618-2018)标准限值;废油基钻井岩屑中部分PAHs(BaP、BbF、BkF、DahA)浓度超过《土壤环境质量建设用地土壤污染风险管控标准(试行)》(GB36600-2018)中筛选值,岩屑中石油烃含量远超管制值.
Three shale gas fields in Chongqing were selected. The pollution characteristics of heavy metals, polycyclic aromatic hydrocarbons (PAHs) and petroleum hydrocarbons in wastewater-based and waste oil-based drilling cuttings from the shale gas mining of five drilling platforms were studied. The concentration of Ba in wastewater-based and waste oil-based drilling cuttings was significantly higher than that of other heavy metals. Zn, Ba, Cr, Ni, Cu and Pb were the main heavy metals in the wastewater-based drilling cuttings. While Ni, Cu, Zn, Pb, Ba, As, Cr were the main heavy metals in the waste oil-based drilling cuttings and among which the concentration of Ni, Cu, Zn and Pb exceeded the corresponding limit. The concentration of PAHs in wastewater-based and waste oil-based drilling cuttings were 1.74~14.8mg/kg and 302~595mg/kg, respectively, which did not exceed the limit of the identification standards for hazardous wastes-identification for toxic substance content. The concentration of the petroleum hydrocarbon in waste oil-based drilling cuttings was 112~213g/kg, which was much higher than the limit of the identification standards for hazardous wastes-identification for toxic substance content. At the same time, the concentration of BaP in the wastewater-based and waste oil-based drilling cuttings was higher than the limit of the soil environmental quality-risk control standard for soil contamination of agricultural land;the concentration of BaP, BbF, BkF and DahA in the waste oil-based drilling cuttings were higher than the screening values of the soil environmental quality-risk control standard for soil contamination of development land and the concentration of the petroleum hydrocarbons in the drilling cuttings were much higher than the intervention values.
作者
吴娜
聂志强
李开环
孙英杰
蔡洪英
张曼丽
周琼
黄启飞
WU Na;NIE Zhi-qiang;LI Kai-huan;SUN Ying-jie;CAI Hong-ying;ZHANG Man-li;ZHOU Qiong;HUANG Qi-fei(School of Environmental and Municipal Engineer, QingdaoUniversity of Technology, Qingdao 266033, China;State Key Laboratory of Environmental Criteria and Risk Assessment, Soil andSolid Waste Environmental Research Institute, Chinese Research Academy of Environmental Sciences, Beijing 100012, China;Chongqing Solid Waste Management Center, Chongqing 401147, China)
出处
《中国环境科学》
EI
CAS
CSCD
北大核心
2019年第3期1094-1100,共7页
China Environmental Science
基金
中央级公益性科研院所基本科研业务专项(2018YSKY-009)
北京市自然科学基金资助项目(8172048)
关键词
页岩气
固体废物
重金属
PAHS
石油烃
污染特性
shale gas
solid waste
heavy metals
PAHs
petroleum hydrocarbons
pollution characteristics
