西安交通大学学报
西安交通大學學報
서안교통대학학보
JOURNAL OF XI'AN JIAOTONG UNIVERSITY
2009年
11期
114-120
,共7页
沈振兴%周娟%曹军骥%韩志伟%李建军%刘随心%霍宗权%韩月梅
瀋振興%週娟%曹軍驥%韓誌偉%李建軍%劉隨心%霍宗權%韓月梅
침진흥%주연%조군기%한지위%리건군%류수심%곽종권%한월매
可吸入颗粒物%多环芳烃%苯并(a)芘(BaP)等效质量浓度%风险评价
可吸入顆粒物%多環芳烴%苯併(a)芘(BaP)等效質量濃度%風險評價
가흡입과립물%다배방경%분병(a)비(BaP)등효질량농도%풍험평개
PM_(10)%PAHs%BaPE%assessment
对2006-12-19~至2007-01-15采集的西安冬季昼夜大气可吸入颗粒物(PM_(10))样品,利用气相色谱-质谱联用仪(GS-MS)分析检测出美国EPA优先控制的12种多环芳烃(PAHs),结果显示,西安冬季大气PM_(10)中白天与夜晚总的PAHS平均质量浓度分别为312.0 ng·m~(-3)和346.0 ng·m~(-3),且PM_(10)中主要以4~5环的多环芳烃为主.采用苯并(a)芘(BaP)等效质量浓度(BaPE)评价PAHS的污染状况,结果表明,苯并(a)芘(BaP)白天及晚上的平均质量浓度分别为30.0 ng·m~(-3)和34.8 ng/m~3,计算得出西安冬季白天与晚上的BaPE平均值分别为45.3 ng·m~(-3)、51.0 ng·m~(-3),含量超过国家标准4.5倍以上.
對2006-12-19~至2007-01-15採集的西安鼕季晝夜大氣可吸入顆粒物(PM_(10))樣品,利用氣相色譜-質譜聯用儀(GS-MS)分析檢測齣美國EPA優先控製的12種多環芳烴(PAHs),結果顯示,西安鼕季大氣PM_(10)中白天與夜晚總的PAHS平均質量濃度分彆為312.0 ng·m~(-3)和346.0 ng·m~(-3),且PM_(10)中主要以4~5環的多環芳烴為主.採用苯併(a)芘(BaP)等效質量濃度(BaPE)評價PAHS的汙染狀況,結果錶明,苯併(a)芘(BaP)白天及晚上的平均質量濃度分彆為30.0 ng·m~(-3)和34.8 ng/m~3,計算得齣西安鼕季白天與晚上的BaPE平均值分彆為45.3 ng·m~(-3)、51.0 ng·m~(-3),含量超過國傢標準4.5倍以上.
대2006-12-19~지2007-01-15채집적서안동계주야대기가흡입과립물(PM_(10))양품,이용기상색보-질보련용의(GS-MS)분석검측출미국EPA우선공제적12충다배방경(PAHs),결과현시,서안동계대기PM_(10)중백천여야만총적PAHS평균질량농도분별위312.0 ng·m~(-3)화346.0 ng·m~(-3),차PM_(10)중주요이4~5배적다배방경위주.채용분병(a)비(BaP)등효질량농도(BaPE)평개PAHS적오염상황,결과표명,분병(a)비(BaP)백천급만상적평균질량농도분별위30.0 ng·m~(-3)화34.8 ng/m~3,계산득출서안동계백천여만상적BaPE평균치분별위45.3 ng·m~(-3)、51.0 ng·m~(-3),함량초과국가표준4.5배이상.
PM_(10) samples were collected in Xi'an from 19 Dec 2006 to 15 Jan 2007 and the polycy-clic aromatic hydrocarbons (PAHs) concentration was measured using a gas chromatography -mass spectrometric (GC-MS). The total PAHs concentration ranged 174. 6-455.0 ng·m~(-3) in the daytime and 193. 9-515.4 ng·m~(-3) in the night. PAHs profiles were predominated by high rings components with 4-5 rings. The carcinogenic power of atmospheric PM_(10) PAHs was evaluated u-sing benzo (a) pyrene (BaP) and benzo(a)pyrene-equivalent carcinogenic concentration(BaPE). The results show that the average concentration of BaP was 30. 0 ng·m~(-3) in the daytime and 34. 8 ng·m~(-3) in the night. The average concentration of BaPE was 45. 3 ng·m~(-3) in the daytime and 51. 0 ng·m~(-3) in the night. The concentration of BaP observed in Xi'an was 4. 5 times greater than that in Chinese standard of environment air quality. PAHs sources were identified using source profiles of previous studies and it is likely that diesel vehicle exhaust and coal combustion are the main sources of PM_(10) PAHs in Xi'an during winter.