摘要
为研究煤焦化过程中焦化固废的潜在环境风险,利用GC-MS和ICP-MS等高精度测试技术研究了某煤焦化企业产生的煤焦化固废(焦油和焦油渣)中16种多环芳烃(PAHs)和7种典型有害元素的浓度特征,分别评价了PAHs和有害元素的潜在健康风险。结果表明:煤焦油和焦油渣中PAHs的总量为174650 mg/kg和69010 mg/kg,并主要以萘、苊烯、芴、菲、蒽、荧蒽和芘为主;煤焦油和焦化渣中的PAHs组成结构较为相似,均以2-4环的PAHs为主,占比分别为91.5%和93.2%,其中3环的PAHs的占比分别达41%和48.5%;单体PAHs的等效致癌毒性中,致癌毒性贡献较大的主要有苯并[a]芘、苯并[b]荧蒽、苯并[a]蒽和二苯并[a,h]蒽这些中高环的PAHs;与土壤环境质量标准GB36600-2018规定的有害元素风险筛选值相比,发现煤焦油和焦油渣中有害元素的含量远低于国家标准规定的风险筛选值。
The coal coking solid wastes including tar and tar slag were collected to determine the potential environmental risks of coal coking solid wastes.The concentrations of 16 priority controlled polycyclic aromatic hydrocarbons(PAHs)were determined by gas chromatography-mass spectrometry(GC-MS),and inductively coupled plasma mass spectrometry(ICP-MS)was conducted to analyze the concentrations of 7 heavy metals.The results showed that the total concentrations of PAHs in tar and tar slag are 174650 mg/kg and 69010 mg/kg,respectively,which are mainly composed by Nap,Ace,Flu,Phe,Ant,Fla and Pyr.The structural characterization of PAHs in tar is consistent with that of tar slag,and is mainly composed by 2-4 rings organic pollutants with 91.5%and 93.2%,respectively.Among them,the 3-ring PAHs account 41%and 48.5%of the total PAHs in tar and tar slag,respectively.The mainly contributors of BEQs are BaP,BbF,BaA and DahA.Heavy metals in the selected solid wastes are regarded as low environmental risks for the low concentrations of heavy metals when compared to that of the limits of Soil environmental quality-Risk control standard for soil concentration of development land.
作者
李达
李昕
任丽霞
车峰
高飞月
Li Da;Li Xin;Ren Lixi;Che Feng;Gao Feiyue(Linhuan Coking Incorporated Company,Huaibei 235141;Hefei University of Technology,School of Resources and Environmental Engineering,Hefei 230009,China)
出处
《广东化工》
CAS
2023年第2期135-137,共3页
Guangdong Chemical Industry
基金
本论文由临涣焦化股份有限公司科研项目支持。
关键词
煤焦化
固废
PAHS
有害元素
环境影响
coal coking
solid wastes
PAHs
toxic element
environmental risk
