【成果】我院何畅教授等在ES&T杂志上发表“利用PUF被动式采样器评价澳大利亚、中国与越南大气中的氯化石蜡”相关的最新学术论文-广东工业大学环境健康与污染控制研究院

近日，广东工业大学环境健康与污染控制研究院、环境科学与工程学院何畅教授与澳大利亚昆士兰大学Jochen Mueller教授、Xianyu (Fisher) Wang高级研究员团队，在持久性有机污染物的全球分布与时空趋势方面取得重大研究进展，研究成果以”Calibration and application of PUF disk passive air samplers to assessing chlorinated paraffins in ambient air in Australia, China and Vietnam”为题发表在期刊Environmental Science & Technology上。论文被期刊编辑部选为补充封面论文，受到了重点推介。该研究建立了利用PUF被动式采样器评价大气中氯化石蜡时空分布的监测系统，在澳大利亚、中国和越南建立了大尺度监测网络。通过长达8年的连续监测，揭示了不同地区大气中各种氯化石蜡的污染水平和变化趋势，反映了不同国家的管控措施对大气中氯化石蜡水平的影响，为进一步评价新污染物对环境和人体健康的风险提供了有力依据。

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论文地址：https://pubs.acs.org/doi/10.1021/acs.est.3c06703

氯化石蜡是一类在环境中被广泛检出的持久性有机污染物。随着短链氯化石蜡（SCCPs）在全球范围内的禁用，中链氯化石蜡（MCCPs）和长链氯化石蜡（LCCPs）在环境中的浓度呈上升趋势。然而，大尺度环境中CPs的时空趋势的研究非常有限。聚氨酯泡沫（PUF）被动空气采样器已经被用于大气中SCCPs的监测，但是现有研究关于PUF对SCCPs的采样效率（RS）的计算差异较大，而MCCPs与LCCPs的RS还未见报道。因此，本研究结合主动式与被动式大气采样技术，计算了PUF被动式采样器对CP的R_S，评估了被动式采样器对大气中CPs浓度测定的准确性。此外，通过采集澳大利亚、中国和越南2013-2018年不同季节的大气样品，分析CPs的水平分布，阐明CPs的时空分布趋势。

图文摘要

英文摘要

Ambient air samples were collected in Brisbane (Australia), Dalian (China), and Hanoi (Vietnam) during Mar 2013 – Feb 2018 using polyurethane foam based passive air samplers. A sampling rate calibration experiment was conducted for chlorinated paraffins (CPs, i.e. short-chain, medium-chain and long-chain CPs), where the sampling rates were 4.5±0.7, 4.8±0.3 and 4.8±2.1 m³ day^-1, for SCCPs, MCCPs, and LCCPs, respectively. The atmospheric concentration of CPs was then calculated and the medians of ∑CPs were 0.079, 1.0 and 0.89 ng m^-3 in Brisbane, Dalian, and Hanoi, respectively. The concentration of CPs in Brisbane’s air remained at low levels, with no significant differences observed between the city background site and the city centre site, indicating limited usage and production of CPs in this city. The highest concentration of MCCPs was detected in Dalian, while the highest concentration of SCCPs was detected in Hanoi. A decrease of SCCP concentration and an increase of MCCPs’ were found in Brisbane’s air from 2016 to 2018, while increasing trends for both SCCPs and MCCPs were observed in Dalian. These results indicated impacts from different sources of CPs in investigated cities.