鞏宏平，朱國(guó)華，周 欣，王 玲，張 睿，馮元群，劉勁松，龐曉露

浙江省環(huán)境監(jiān)測(cè)中心，浙江 杭州 310015

鞏宏平，朱國(guó)華，周 欣，王 玲，張 睿，馮元群，劉勁松，龐曉露

浙江省環(huán)境監(jiān)測(cè)中心，浙江 杭州 310015

1 實(shí)驗(yàn)部分

1.1 樣品采集

2009年7月至2012年2月期間，在杭州城區(qū)2個(gè)固定監(jiān)測(cè)點(diǎn)(A和B)進(jìn)行了10批次24個(gè)空氣樣品采集。A監(jiān)測(cè)點(diǎn)設(shè)在城市中心區(qū)域，周邊主要為居住區(qū)、商業(yè)區(qū)及旅游景區(qū)；B監(jiān)測(cè)點(diǎn)設(shè)在城郊的結(jié)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(yè)。

1.2 樣品分析

1.3 質(zhì)量控制結(jié)果

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

2 結(jié)果與討論

表1 杭州城區(qū)環(huán)境空氣中二英檢測(cè)結(jié)果

注：H表示PUF和QFF合并分析；“空”表示無(wú)相應(yīng)數(shù)據(jù)。

圖1 沙塵天氣和日常天氣環(huán)境空氣中二英同類物分布

圖2 環(huán)境空氣樣品聚類分析圖

3 結(jié)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(huán)?？蒲杏?jì)劃項(xiàng)目(2008001，2012A010，2012A039)

鞏宏平(1979-)，男，山東濟(jì)寧人，碩士，高級(jí)工程師。

劉勁松

X823

A

1002-6002(2016)04- 0074- 05

10.19316/j.issn.1002-6002.2016.04.14