摘要
文章研究运用GC/MS联用法对山西省某焦化厂焦化废水生化处理前后的16种EPA优控PAHs进行定量分析。结果表明,该焦化厂焦化废水中∑PAHs经过生化处理后去除效率为78.87%,尤其是对中环数(3环和4环)的去除效果最好。生化处理后的B[a]P平均浓度超出GB8978-1996《污水综合排放标准》中要求的排放限值。处理后的焦化废水中PAHs环数特征与炼焦过程排放的大气污染物特征相似,不同化合物的比值和之前研究的参考值有差异。应用BEQ潜在风险评价模型计算表明,生化处理后的焦化废水健康风险显著下降,但依然不能忽视。
Contents and compositions of polycyclic aromatic hydrocarbons(PAHs) listed for prior control by US EPA in a coking plant's coking wastewater in Shanxi province were detected with gas chromatography-mass spectrometry(GC/MS).The results showed that the removal efficiency of PAHs in coking wastewater by biochemical treatment was 78.87%,even better for 3 rings and 4 rings PAHs.The concentration of BaP exceeded the national sewage effluent discharge standards(GB8978-1996).The ring characteristic of PAHs in coking wastewater was similar with atmospheric pollutants during coking.The ratios of different PAHs compounds were different from previous studies,which could be consulted for PAHs source analysis in water.Potential risk evaluation model was BEQ(BaP equivalent concentration),and the results showed that the healthy risks of coking wastewater after treatment were declined,but still couldn't be ignored.
出处
《环境科学与技术》
CAS
CSCD
北大核心
2013年第S1期159-162,共4页
Environmental Science & Technology
基金
国家青年科学基金项目(40902098)
山西省青年科技研究基金(2011021025-2)
山西省高等学校青年学术带头人项目
关键词
多环芳烃
焦化废水
组成特征
处理研究
PAHs
coking wastewater
composition characteristics
treatment study
