全二维气相色谱—飞行时间质谱非靶向筛查页岩气场地不同样品中的微量有机污染物及溯源分析  

Comprehensive two-dimensional gas chromatography/time of flight mass spectrometry non-targeted screening of trace organic pollutants in different samples from shale gas sites and traceability fractionation

作　　者：罗毅豪 欧阳明慧 崔旺 徐茂源 任国发[1] LUO Yihao;OUYANG Minghui;CUI Wang;XU Maoyuan;REN Guofa(School of Environmental and Chemical Engineering,Shanghai University,Pollution and Health Research Institute,Baoshan Shanghai 201900)

机构地区：[1]上海大学环境与化学工程学院,污染与健康研究所,上海宝山201900

出　　处：《环境污染与防治》2024年第7期1002-1008,共7页Environmental Pollution & Control

基　　金：国家重点研发计划项目(No.2019YFC1805501);有机地球化学国家重点实验室开放基金课题(No.SKLOG202201)。

摘　　要：以全二维气相色谱—飞行时间质谱为技术手段,通过对某页岩气开采场地样品中微量有机污染物进行非靶向筛查,构建了基于实际样品分析的有机污染物清单。通过对不同样品中有机污染物特征分析,解析了部分有机污染物的来源。烷烃是钻井泥浆中被识别出的主要有机污染物类型。与钻井泥浆相比,脱油岩屑中烷烃占比显著降低而羰基、醇类化合物占比升高,说明热脱附技术对石油烃类具有良好的去除效果,但对极性更强的羰基和醇类化合物的去除效果可能欠佳。烷烃和羰基化合物是压裂液和返排液中的主要污染物。在压裂液和返排液中还可识别出大量被用作抗菌剂、增塑剂、表面活性剂和引发剂的有机污染物。Using comprehensive two-dimensional gas chromatography/time of flight mass spectrometry as a technical means,a list of organic pollutants based on actual sample analysis was constructed by non-targeted screening of trace organic pollutants in samples from a shale gas extraction site.The sources of some organic contaminants were identified by analyzing the characteristics of organic pollutants in different samples.Alkanes were the main organic pollutants identified in drilling mud.Compared with the drilling mud,the proportion of alkanes in the deoiled rock cuttings was significantly lower while the proportion of carbonyl and alcohol compounds was higher,showing that the thermal desorption technique had a good removal effect on petroleum hydrocarbons,but might be ineffective in removing the more polar carbonyl and alcohol compounds.Alkanes and carbonyl compounds were the main contaminants in fracking and flowback fluids.A large number of chemicals used as antimicrobials,plasticizers,surfactants,initiators,could be identified in fracking fluids and flowback water.

关 键 词：有机污染物 全二维气相色谱—飞行时间质谱 非靶向筛查 页岩气 

分 类 号：O657.63[理学—分析化学] X830.2[理学—化学] X741[环境科学与工程—环境工程]