杭州城區環境空氣中二英濃度狀況研究

鞏宏平，朱國華，周 欣，王 玲，張 睿，馮元群，劉勁松，龐曉露

浙江省環境監測中心，浙江 杭州 310015

鞏宏平，朱國華，周 欣，王 玲，張 睿，馮元群，劉勁松，龐曉露

浙江省環境監測中心，浙江 杭州 310015

1 實驗部分

1.1 樣品采集

2009年7月至2012年2月期間，在杭州城區2個固定監測點(A和B)進行了10批次24個空氣樣品采集。A監測點設在城市中心區域，周邊主要為居住區、商業區及旅游景區；B監測點設在城郊的結合部，周邊主要分布著交通物流中心、鋼鐵冶煉廠、燃煤電廠等企業。

1.2 樣品分析

1.3 質量控制結果

采樣的吸附材料(QFF、PUF)按照HJ 77.2—2008中方法分別進行了清洗和處理。全程空白樣品的質量濃度小于0.01 pg/m3；分析樣品中采樣內標(SS)回收率范圍為72%～130%，凈化內標(IS)回收率范圍為62%～150%。質量控制結果均滿足HJ 77.2—2008中質量控制與質量管理的要求。

2 結果與討論

表1 杭州城區環境空氣中二英檢測結果

注：H表示PUF和QFF合并分析；“空”表示無相應數據。

圖1 沙塵天氣和日常天氣環境空氣中二英同類物分布

圖2 環境空氣樣品聚類分析圖

3 結論

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Study on PCDD/Fs in the Ambient Air of Hangzhou City，China

GONG Hongping, ZHU Guohua, ZHOU Xin, WANG Ling, ZHANG Rui, FENG Yuanqun, LIU Jinsong, PANG Xiaolu

Zhejiang Environmental Monitoring Centre，Hangzhou 310015, China

According to the result of PCDD/Fs of the ambient air of Hangzhou city from July 2009 to February 2012, PCDD/Fs toxic equivalent concentrations range from 0.13 to 0.55 pg TEQ/m3and the average value is 0.34 pg TEQ/m3. It is manifested that the PCDD/Fs concentrations of the ambient air of Hangzhou city rarely change with seasons; the values in summer were slightly lower than those in winter; There were no significant changes among main administrative areas; annual trend was not found during 2009 to 2012; the PCDD/Fs concentrations increased significantly in sandstorm weather. The dioxin homologues distributions in ambient air of fireworks heavily setting off weather and normal weather were significantly different, The proportion of total mass concentration of OCDD was significantly increased Analyzing the 24 monitoring results by using software of IBM Statistics 19.0, it is manifested that distribution of PCDD/Fs congeners in the ambient air of Hangzhou city has significant source characteristics.

PCDD/Fs; ambient air; Hangzhou

2015-06-23;

2015-10-23

浙江省環保科研計劃項目(2008001，2012A010，2012A039)

鞏宏平(1979-)，男，山東濟寧人，碩士，高級工程師。

劉勁松

X823

A

1002-6002(2016)04- 0074- 05

10.19316/j.issn.1002-6002.2016.04.14