Monitoring gas- and particulate-phase short-chain polychlorinated paraffins in the urban air of Dalian by a self-developed passive sampler
Monitoring gas- and particulate-phase short-chain polychlorinated paraffins in the urban air of Dalian by a self-developed passive sampler
复制标题
自主研发的被动采样器监测大连城市空气中气相和颗粒相短链多氯烷烃
DOI：
10.1016/j.jes.2019.01.007
复制
发表时间：
2019
影响因子：
6.9
通讯作者：
Wei Wang
中科院分区：
文献类型：
--
作者：
Yifan Wang;Xiuhua Zhu;Yuan Gao;Hao Bai;Pengyuan Wang;Jiping Chen;Heping Yuan;Longxing Wang;Xiaoxiao Li;Wei Wang
2016年9月至2017年8月，利用自行研制的被动式采样器（PAS1）和主动式大容量采样器同时监测了中国大连城市空气中短链多氯代烷烃（SCCPs）的浓度。PAS1成功地收集了环境空气中的全部目标短链氯化石蜡。在181天的采样期间，PAS1采样的空气中短链氯化石蜡处于线性吸收阶段。被动和主动样本显示出相似的同系物特征，两种样本中短链氯化石蜡的主要贡献者相似。PAS1采样的短链氯化石蜡总浓度与主动采样器在四个季节的采样浓度之间存在显著的线性相关性。测量了PAS 1对短链氯化石蜡气相和颗粒相的被动采样率。研究了气相短链氯化石蜡的PAS 1（Rair）采样率的定量结构-性质关系。从分子角度来看，Rair主要受短链氯化石蜡的分子量和过冷液体蒸气压的影响。总的来说，大连城市空气中的短链氯化石蜡主要存在于气相中，低分子量的短链氯化石蜡主要存在于气相中，而高分子量的短链氯化石蜡主要吸附或吸收在空气颗粒物上。四季空气中短链氯化石蜡的浓度不同，并对空气中短链氯化石蜡的浓度与气象参数进行了相关性分析。根据欧洲风险评估标准，对采样点周围居民吸入空气中短链氯化石蜡的暴露风险进行了评估。
The concentration of short-chain polychlorinated paraffins (SCCPs) in the urban air of Dalian, China was monitored from September 2016 to August 2017 with a self-developed passive sampler (PAS1) and an active high-volume sampler, simultaneously. PAS1 successfully collected the entire target SCCPs in the ambient air. Air SCCPs sampled by PAS1 were found be in the linear uptake stage during 181 days of sampling. Passive and active samples showed comparable congener profiles, and the dominant contributors of SCCPs in the two kinds of samples were similar. A significant linear correlation was observed between the total concentration of SCCPs sampled by PAS1 and active sampler in the four seasons. The passive sampling rates of the PAS1 for the gas and particulate phases of SCCPs were measured. The quantitative structure–property relationship of the sampling rate of PAS1 (Rair) for gas-phase SCCPs was studied. From the molecular point of view,Rairwas mainly affected by the molecular weight and sub-cooled liquid vapor pressure of SCCPs. In general, SCCPs in the urban air of Dalian mainly existed in gas phase, lower molecular weight SCCPs primarily occurred in the gas phase, whereas higher molecular weight SCCPs were predominately adsorbed or absorbed on airborne particles. The air concentration of SCCPs in the four seasons were different, the correlation of the concentration of SCCPs in the air with the meteorology parameters was conducted. The exposure risk by intake air SCCPs of the residents around the sampling sites was evaluated according to the European risk assessment standards.