淮北矿区煤矸石多环芳烃污染特征及毒性评价  

Pollution characteristics and toxicity assessment of PAHs in coal gangue from mine aera in Huaibei

作　　者：陈雪 许丹丹 钱雅慧 洪秀萍 梁汉东[1,2] CHEN Xue;XU Dan-dan;QIAN Ya-hu;HONG Xiu-ping;LIANG Han-dong(State Key Laboratory of Coal Resources and Safe Mining,China University of Mining and Technology,Beijing 100083,China;College of Geoscience and Surveying Engineering,China University of Mining and Technology,Beijing 100083,China;College of Life Sciences,Huaibei Normal University,Huaibei 235000,China)

机构地区：[1]中国矿业大学(北京),煤炭资源与安全开采国家重点实验室,北京100083 [2]中国矿业大学(北京)地球科学与测绘工程学院,北京100083 [3]淮北师范大学生命科学学院,安徽淮北235000

出　　处：《中国环境科学》2022年第2期753-760,共8页China Environmental Science

基　　金：国家自然科学基金资助项目(41772157);国家自然科学青年基金资助项目(41902172)。

摘　　要：利用气相色谱-三重四级杆质谱(GC-MS/MS)对采自刘桥二矿的13件煤矸石样品(7件新鲜煤矸石样品,6件风化煤矸石样品)中16种优先级母体多环芳烃(16PAHs)和烷基多环芳烃(a-PAHs)进行了定性和定量分析.结果表明:煤矸石中不仅含有16PAHs,而且含有对应的a-PAHs,后者含量(均值587.88ng/g,n=13)普遍高于前者(均值505.23ng/g,n=13).16PAHs以萘,菲,为主,分别占16PAHs总和的15%,33%和15%;a-PAHs则以烷基萘与烷基菲为主,分别占a-PAHs总和的22%与40%.风化样品中Σ16PAHs及Σa-PAHs含量均高于新鲜样品,仅苯并[a]芘,二甲基取代菲风化后含量降低,相对应的一甲基苯并[a]芘(C_(1)-BaP),菲在风化后升高.特征比值法显示,煤矸石样品满足0<C_(0)/(C_(0)+C_(1)-C_(4))PHE<0.25,0.2<C_(0)/(C_(0)+C_(1)-C_(5))NAP<0.55,且运用这一比值对煤炭,石油,沉积物样品进行分析也有较好的分散度,能够用于区分煤矸石源PAHs.毒性评价显示煤矸石中BaP等效浓度达到194.60ng/g,a-PAH尤其是C_(1)-BaP贡献了大部分的毒性风险.本文为PAHs源解析提供了煤矸石来源的基础实验数据及判定此来源的特征比值,并揭示了煤矸石中PAHs可能具有的潜在生态风险.In this paper,we collected 13 gangue samples(7 fresh samples and 6 weathered samples)from Liuqiao Mine in Huaibei,and 16 parent polycyclic aromatic hydrocarbons(16 PAHs)and alkyl-polycyclic aromatic hydrocarbons(a-PAHs)were analyzed by GC-MS/MS on qualitative and quantitative.The results showed that 16PAHs and a-PAHs were generally contained in coal gangue,and the content level of a-PAHs(Σa-PAHs average 587.88ng/g,n=13)was generally higher than that of 16PAHs(Σ16PAHs average 505.23ng/g,n=13).The most abundant substance was naphthalene,phenanthrene and chrysene,accounted for 15%,33%and 15%ofΣ16PAHs,respectively.Alkyl-naphthalene and alkyl-phenanthrene in the content of the advantage,accounted for 22%and 40%ofΣa-PAHs.The contents ofΣ16PAHs andΣa-PAHs in the weathered samples was higher than those in the fresh samples.Only the contents of Benzoapyrene and C2-phenanthrene decreased after weathering,and the corresponding contents of C_(1)-Benzoapyrene and phenanthrene increased after weathering.The characteristic ratio shown that the coal gangue samples satisfy 0<C_(0)/(C_(0)+C_(1)-C_(4))PHE<0.25 and 0.2<C_(0)/(C_(0)+C_(1)-C_(5))NAP<0.55;apply these ratios to PAHs of coal,petroleum,sediment also have a good dispersion.Therefore,these ratios can be used for identify PAHs from coal gangue.Through the toxicity evaluation of coal gangue,the average Benzoapyrene toxicity equivalent concentration reached 194.60ng/g,in which a-PAH contributed most of the toxicity equivalent concentration.This study provides basic experimental data for the source of PAHs and reveals the possible ecological risks of PAHs in coal gangue.

关 键 词：煤矸石 烷基多环芳烃 风化 特征比值 毒性当量(TEQ) 

分 类 号：X503[环境科学与工程—环境工程]